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115-401: Tennis is a racket sport that is played either individually against a single opponent ( singles ) or between two teams of two players each ( doubles ). Each player uses a tennis racket strung with a cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court . The object is to manoeuvre the ball in such a way that the opponent is not able to play

230-535: A felt coating. Traditionally white, the predominant colour was gradually changed to optic yellow in the latter part of the 20th century to allow for improved visibility. Tennis balls must conform to certain criteria for size, weight, deformation , and bounce to be approved for regulation play. The International Tennis Federation (ITF) defines the official diameter as 65.41–68.58 mm (2.575–2.700 in). Balls must weigh between 56.0 and 59.4 g (1.98 and 2.10 oz). Tennis balls were traditionally manufactured in

345-409: A racket or paddle to hit a ball or other object. Rackets consist of a handled frame with an open hoop that supports a network of tightly stretched strings. Paddles have a solid face rather than a network of strings, but may be perforated with a pattern of holes, or be covered with a textured surface. Lawn mower Two main styles of blades are used in lawn mowers. Lawn mowers employing

460-472: A throttle control on the handlebar with which the operator can adjust the engine speed. Other mowers have a fixed, pre-set engine speed. All are equipped with a governor (often centrifugal/mechanical or air vane style) to open the throttle as needed to maintain the pre-selected speed when the force needed to cut the thicker or taller grass is encountered. Gasoline mowers have the advantages over electric mowers of greater power and distance range. They do create

575-608: A 21-and-under demonstration event in 1984. This reinstatement was credited by the efforts of then ITF president Philippe Chatrier , ITF general secretary David Gray and ITF vice president Pablo Llorens, with support from International Olympic Committee president Juan Antonio Samaranch . The success of the event was overwhelming, and the IOC decided to reintroduce tennis as a full-medal sport at Seoul in 1988. The Davis Cup , an annual competition between men's national teams, dates to 1900. The analogous competition for women's national teams,

690-541: A best-of-five, wins the match. Only in the final sets of matches at the Olympic Games and Fed Cup are tiebreaks not played. In these cases, sets are played indefinitely until one player has a two-game lead, occasionally leading to some remarkably long matches . In tournament play, the chair umpire announces the end of the match with the well-known phrase " Game, set, match " followed by the winning person's or team's name. A game point occurs in tennis whenever

805-405: A cylinder or reel mower are: A rotary mower rotates about a vertical axis with the blade spinning at high speed relying on impact to cut the grass. This tends to result in a rougher cut and bruises and shreds the grass leaf resulting in discolouration of the leaf ends as the shredded portion dies. This is particularly prevalent if the blades become clogged or blunt. Most rotary mowers need to be set

920-404: A dangerous electric shock . Installing a residual-current device (GFCI) on the outlet may reduce the shock risk. Cordless electric mowers are powered by a variable number (typically 1–4) of 12-to-80-volt rechargeable batteries . Typically, more batteries mean more run time and/or power (and more weight ). Batteries can be in the interior of the lawnmower or on the outside. If on the outside,

1035-557: A doubles team. The single player gets to utilize the alleys normally reserved only for a doubles team. Conversely, the doubles team does not use the alleys when executing a shot. The scoring is the same as for a regular game. This format is not sanctioned by any official body. "Australian doubles", another informal and unsanctioned form of tennis, is played with similar rules to the Canadian doubles style, only in this version, players rotate court position after each game, each player taking

1150-721: A game that combined elements of racquets and the Basque ball game pelota , which they played on Perera's croquet lawn in Birmingham , England. In 1872, along with two local doctors, they founded the world's first tennis club on Avenue Road, Leamington Spa . This is where "lawn tennis" was used as the name of an activity by a club for the first time. In Tennis: A Cultural History , Heiner Gillmeister reveals that on 8 December 1874, British army officer Walter Clopton Wingfield wrote to Harry Gem, commenting that he (Wingfield) had been experimenting with his version of lawn tennis "for

1265-417: A gasoline lawn mower can be 95 decibels or more. Corded electric mowers are limited in range by their trailing power cord, which may limit their use with lawns extending outward more than 100–150 feet (30–45 m) from the nearest available power outlet. There is the additional hazard with these machines of accidentally mowing over the power cable, which stops the mower and may put users at risk of receiving

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1380-946: A gear reduction, to fully integrated units containing a pump, motor and gear reduction. Hydrostatic transmissions are more expensive than mechanical transmissions, but they are easier to use and can transmit greater torque to the wheels compared to a typical mechanical transmission. The least common drive type, and the most expensive, is electric. There have been a number of attempts to replace hydrostatic transmissions with lower cost alternatives, but these attempts, which include variable belt types, e.g. MTD's "Auto Drive", and toroidal, have various performance or perception problems that have caused their market life to be short or their market penetration to be limited. Riding lawn mowers can often mount other devices, such as rototillers/rotavators, snow plows, snow blowers, yard vacuums, occasionally even front buckets or fork-lift tines (these are more properly known as "lawn tractors" in this case, being designed for

1495-404: A little higher than cylinder equivalents to avoid scalping and gouging of slightly uneven lawns, although some modern rotaries are fitted with a rear roller to provide a more formal striped cut. These machines will also tend to cut lower ( 13 mm or 1 ⁄ 2  in) than a standard four-wheeled rotary. The main parts of a rotary mower are: Extensive grass trimming was not common before

1610-562: A machine that could be drawn by animals, and sixty years before a steam-powered lawn mower was built. In the 1850s, Thomas Green & Son of Leeds introduced a mower called the Silens Messor (meaning silent cutter), which used a chain drive to transmit power from the rear roller to the cutting cylinder. These machines were lighter and quieter than the gear-driven machines that preceded them, although they were slightly more expensive. The rise in popularity of lawn sports helped prompt

1725-518: A major nation of the federation with enhanced voting power, and each now operated a major event. The comprehensive rules promulgated in 1924 by the ILTF have remained largely stable in the ensuing 80 years, the one major change being the addition of the tiebreak system designed by Jimmy Van Alen . That same year, tennis withdrew from the Olympics after the 1924 Games , but returned 60 years later as

1840-460: A number of older models used two-stroke engines ), running on gasoline (petrol) or other liquid fuels . Internal combustion engines used with lawn mowers normally have only one cylinder. Power generally ranges from four to seven horsepower . The engines usually have a carburetor and require a manual pull crank to start them, although an electric starter is offered on some models, particularly large riding and commercial mowers. Some mowers have

1955-433: A number of tasks). The ability to tow other devices is because they have multiple gears, often up to 5 or 6 and variable top speeds. Compact utility tractors equipped with a belly mower can look similar to riding lawn mowers, but they are typically larger, equipped with diesel engines, and feature a three-point hitch and rollover protection structure ; these features are generally absent on riding lawn mowers. The deck of

2070-577: A particular scale and purpose. The smallest types, non-powered push mowers, are suitable for small residential lawns and gardens. Electrical or piston engine-powered push-mowers are used for larger residential lawns (although there is some overlap). Riding mowers , which sometimes resemble small tractors, are larger than push mowers and are suitable for large lawns. However, commercial riding lawn mowers (such as zero-turn mowers ) can be "stand-on" types and often bear little resemblance to residential lawn tractors, being designed to mow large areas at high speed in

2185-485: A particularly exhausting game, Louis drank a large quantity of cooled wine and subsequently died of either pneumonia or pleurisy , although there was also suspicion of poisoning. Because of the contemporary accounts of his death, Louis X is history's first tennis player known by name. Another of the early enthusiasts of the game was King Charles V of France , who had a court set up at the Louvre Palace . It

2300-466: A player to contest the line call of a point, a system known as Hawk-Eye . Tennis is played by millions of recreational players and is a popular worldwide spectator sport. The four Grand Slam tournaments (also referred to as the majors) are especially popular and are considered the highest level of competition for the sport. These tournaments are the Australian Open , played on hardcourts ;

2415-461: A range of sizes were available, making the Standard the first truly mass-produced engine-powered mower. Rotary mowers were not developed until engines were small enough and powerful enough to run the blades at sufficient speed. Many people experimented with rotary blade mowers in the late 1920s and early 1930s, and Power Specialties Ltd. introduced a gasoline-powered rotary mower. Kut Kwick replaced

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2530-442: A rotary mower is typically made of steel. Lighter steel is used on less expensive models, and heavier steel on more expensive models for durability. Other deck materials include aluminium , which does not rust and is a staple of higher priced mowers, and hard composite plastic, which does not rust and is lighter and less expensive than aluminium. Electric mowers typically have a plastic deck. Riding mowers typically have an opening in

2645-476: A separate attachment to discharge grass onto the lawn. Some side discharge mower manufacturers also sell separate "mulching plates" that will cover the opening on the side discharge mower and, in combination with the proper blades, will convert the mower to a mulching mower. These conversions are impractical when compared with 2- or 3-in-1 mowers which can be converted in the field in seconds. There are two types of bagging mowers. A rear bag mower features an opening on

2760-413: A sequence of games played with service alternating between games, ending when the count of games won meets certain criteria. Typically, a player wins a set by winning at least six games and at least two games more than the opponent. If one player has won six games and the opponent five, an additional game is played. If the leading player wins that game, the player wins the set 7–5. If the trailing player wins

2875-492: A sequence of sets. The outcome is determined through a best of three or five sets system. On the professional circuit, men play best-of-five-set matches at all four Grand Slam tournaments, Davis Cup, and the final of the Olympic Games and best-of-three-set matches at all other tournaments, while women play best-of-three-set matches at all tournaments. The first player to win two sets in a best-of-three, or three sets in

2990-769: A significant amount of pollution due to the combustion in the engine, and their engines require periodic maintenance such as cleaning or replacement of the spark plug and air filter , and changing the engine oil. California passed Assembly Bill 1356 an air pollution control law on October 9, 2021. The California bill barred sales of spark ignited (gasoline fueled) internal combustion engines less than 25HP used for farm or construction machines as of January 1, 2024. The California bill does not ban turf care machines larger than 25HP or those powered by compression ignition (diesel) engines. Electric mowers are further subdivided into corded and cordless electric models. Both are relatively quiet, typically producing less than 75 decibels, while

3105-464: A single blade that rotates about a single vertical axis are known as rotary mowers, while those employing a cutting bar and multiple blade assembly that rotates about a single horizontal axis are known as cylinder or reel mowers (although in some versions, the cutting bar is the only blade, and the rotating assembly consists of flat metal pieces which force the blades of grass against the sharp cutting bar). There are several types of mowers, each suited to

3220-453: A small agricultural tractor , with the cutting deck mounted amidships between the front and rear axles. The drives for these mowers are in several categories. The most common transmission for tractors is a manual transmission. The second most common transmission type is a form of continuously variable transmission , called hydrostatic transmission. These transmissions take several forms, from pumps driving separate motors, which may incorporate

3335-433: A superior alternative to the scythe , and was granted a British patent on August 31, 1830. Budding's first machine was 19 inches (480 mm) wide with a frame made of wrought iron . The mower was pushed from behind. Cast-iron gear wheels transmitted power from the rear roller to the cutting cylinder, allowing the rear roller to drive the knives on the cutting cylinder; the ratio was 16:1. Another roller placed between

3450-459: A turn at playing alone against the other two. As such, each player plays doubles and singles over the course of a match, with the singles player always serving. Scoring styles vary, but one popular method is to assign a value of 2 points to each game, with the server taking both points if he or she holds serve and the doubles team each taking one if they break serve. Wheelchair tennis can be played by able-bodied players as well as people who require

3565-577: A valid return. If a player is unable to return the ball successfully, the opponent scores a point . Playable at all levels of society and at all ages, tennis can be played by anyone who can hold a racket, including wheelchair users . The original forms of tennis developed in France during the late Middle Ages . The modern form of tennis originated in Birmingham , England, in the late 19th century as lawn tennis . It had close connections to various field (lawn) games such as croquet and bowls as well as to

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3680-512: A wheelchair for mobility. An extra bounce is permitted. This rule makes it possible to have mixed wheelchair and able-bodied matches. It is possible for a doubles team to consist of a wheelchair player and an able-bodied player (referred to as "one-up, one-down"), or for a wheelchair player to play against an able-bodied player. In such cases, the extra bounce is permitted for the wheelchair users only. List of racket sports Racket sports (or racquet sports ) are games in which players use

3795-620: A wider swath, were built in the United States in 1919 by the Worthington Mower Company . In the 1920s one of the most successful companies to emerge during this period was Atco, at that time a brand name of Charles H Pugh Ltd. The Atco 'Standard' motor mower, launched in 1921 was an immediate success. Just 900 of the 22-inch-cut machines were made in 1921, each costing £75. Within five years, annual production had accelerated to tens of thousands. Prices were reduced and

3910-498: A year and a half". In December 1873, Wingfield designed and patented a game which he called sphairistikè ( Greek : σφαιριστική , meaning "ball-playing"), and which was soon known simply as "sticky" – for the amusement of guests at a garden party on his friend's estate of Nantclwyd Hall , in Llanelidan , Wales. According to R. D. C. Evans, turfgrass agronomist , "Sports historians all agree that [Wingfield] deserves much of

4025-405: Is a let or net service , which is void, and the server retakes that serve. The player can serve any number of let services in a point and they are always treated as voids and not as faults. A fault is a serve that falls long or wide of the service box, or does not clear the net. There is also a "foot fault" when a player's foot touches the baseline or an extension of the centre mark before the ball

4140-481: Is called the doubles alley, playable in doubles play. The line that runs across the centre of a player's side of the court is called the service line because the serve must be delivered into the area between the service line and the net on the receiving side. Despite its name, this is not where a player legally stands when making a serve. The line dividing the service line in two is called the centre line or centre service line. The boxes this centre line creates are called

4255-434: Is hit. If the second service, after a fault, is also a fault, the server double faults , and the receiver wins the point. However, if the serve is in, it is considered a legal service. A legal service starts a rally , in which the players alternate hitting the ball across the net. A legal return consists of a player hitting the ball so that it falls in the server's court, before it has bounced twice or hit any fixtures except

4370-518: Is not played, the set is referred to as an advantage set , where the set continues without limit until one player leads by a two-game margin. A "love set" means that the loser of the set won zero games, colloquially termed a "jam donut" in the US. In tournament play, the chair umpire announces the winner of the set and the overall score. The final score in sets is always read with the winning player's score first, e.g. "6–2, 4–6, 6–0, 7–5". A match consists of

4485-430: Is often available, but can be poor in some models. The quality of cut can be inferior if the grass is pushed away from the blade by the cushion of air. A robotic lawn mower is an autonomous robot used to cut lawn grass. A typical robotic lawn mower (in particular earlier generation models) requires the user to set up a border wire around the lawn that defines the area to be mowed. The robot uses this wire to locate

4600-416: Is often the same width as the others. The players or teams start on opposite sides of the net. One player is designated the server , and the opposing player is the receiver . The choice to be server or receiver in the first game and the choice of ends is decided by a coin toss before the warm-up starts. Service alternates game by game between the two players or teams. For each point, the server starts behind

4715-423: Is straight and definite, as if cut with a pair of scissors. This clean cut promotes healthier, thicker and more resilient lawn growth that is more resistant to disease, weeds and parasites. Lawn cut with a cylinder mower is less likely to result in yellow, white or brown discolouration as a result of leaf shredding. While the cutting action is often likened to that of scissors, it is neither necessary nor desirable for

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4830-421: Is unusual in that it is played on a variety of surfaces. Grass , clay , and hard courts of concrete or asphalt topped with acrylic are the most common. Occasionally carpet is used for indoor play, with hardwood flooring having been historically used. Artificial turf courts can also be found. The lines that delineate the width of the court are called the baseline (farthest back) and the service line (middle of

4945-807: The Fed Cup , was founded as the Federation Cup in 1963 to celebrate the 50th anniversary of the founding of the ITF. In 1926, promoter C. C. Pyle established the first professional tennis tour with a group of American and French tennis players playing exhibition matches to paying audiences. The most notable of these early professionals were the American Vinnie Richards and the Frenchwoman Suzanne Lenglen . Players turned pro would no longer be permitted to compete in

5060-588: The French Open , played on red clay courts ; Wimbledon , played on grass courts ; and the US Open , also played on hardcourts. Additionally, tennis was one of the original Olympic sports , and has been consistently competed in the Summer Olympic Games since 1988 . Historians believe that the game's ancient origin lay in 12th-century northern France, where a ball was struck with the palm of

5175-855: The United States Tennis Association ) in order to standardize the rules and organize competitions. The US National Men's Singles Championship, now the US Open , was first held in 1881 at the Newport Casino , Newport, Rhode Island . The US National Women's Singles Championships were first held in 1887 in Philadelphia . Tennis also became popular in France, where the French Championships date to 1891, although until 1925 they were open only to tennis players who were members of French clubs. Thus, Wimbledon,

5290-406: The 20th century until first metal and then composites of carbon graphite, ceramics, and lighter metals such as titanium were introduced. These stronger materials enabled the production of oversized rackets that yielded yet more power. Meanwhile, technology led to the use of synthetic strings that match the feel of gut yet with added durability. Under modern rules of tennis, the rackets must adhere to

5405-542: The Archimedean Lawn Mower Co. in 1871. In the United States, gasoline-powered lawn mowers were first manufactured in 1914 by Ideal Power Mower Co. of Lansing, Michigan , based on a patent by Ransom E. Olds . Ideal Power Mower also introduced the world's first self-propelled, riding lawn tractor in 1922, known as the "Triplex". The roller-drive lawn mower has changed very little since around 1930. Gang mowers , those with multiple sets of blades to cut

5520-522: The Oxford colleges. In an agreement between John Ferrabee and Edwin Budding dated May 18, 1830, Ferrabee paid the costs of enlarging the small blades, obtained letters of patent and acquired rights to manufacture, sell and license other manufacturers in the production of lawn mowers. Without patent, Budding and Ferrabee were shrewd enough to allow other companies to build copies of their mower under licence,

5635-766: The US Open, the French Open and the Australian Open (dating to 1905) became and have remained the most prestigious events in tennis. Together, these four events are called the Majors or Slams (a term borrowed from bridge rather than baseball ). In 1913, the International Lawn Tennis Federation (ILTF), now the International Tennis Federation (ITF), was founded and established three official tournaments as

5750-623: The United States and Europe. Although the process of producing the balls has remained virtually unchanged for the past 100 years, the majority of manufacturing now takes place in the Far East . The relocation is due to cheaper labour costs and materials in the region. Tournaments that are played under the ITF Rules of Tennis must use balls that are approved by the International Tennis Federation (ITF) and be named on

5865-465: The air cushion and typically have plastic bodies with an electric motor. The most significant disadvantage, however, is the cumbersome usability in rough terrain or on the edges of lawns, as the lifting air-cushion is destroyed by wide gaps between the chassis and the ground. Hover mowers are built to operate on steep slopes, waterfronts, and high-weeded areas, so they are often used by golf course greenskeepers and commercial landscapers. Grass collection

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5980-452: The arm than most strings. Most synthetic strings are made from monofilament or multifiliament nylon strings. Monofilament strings are cheap to buy, and are used widely by many recreational level players for their all round performance, while multifilament strings are created to mimic natural gut more closely by weaving together fibres, but are generally more expensive than their monofilament counterparts. Polyester strings allow for more spin on

6095-451: The back of the mower through which the grass is expelled into the bag. Hi-vac mowers have a tunnel that extends from the side discharge to the bag. Hi-vac is also the type of grass collection used on some riding lawn mowers and lawn tractors and is suitable for use in dry conditions but less suitable for long wet lush grass as they often clog up. Mulching and bagging mowers are not well suited to long grass or thick weeds. In some ride-on mowers,

6210-418: The back of the tractor. Riding mowers (U.S. and Canada) or ride-on mowers (U.K. and Canada) are a popular alternative for large lawns. The operator is provided with a seat and controls on the mower and literally rides on the machine. Most use the horizontal rotating blade system, though usually with multiple blades. A common form of ride-on mower is the lawn tractor . These are usually designed to resemble

6325-430: The ball than any other string, due to their firm strings, while keeping control of the ball, and this is why many players use them, especially higher player ones. Kevlar tennis strings are highly durable, and are mostly used by players that frequently break strings, because they maintain tension well, but these strings can be stiff on the arm. Hybrid stringing is when a tennis racket is strung with two different strings for

6440-410: The baseline, between the centre mark and the sideline. The receiver may start anywhere on their side of the net. When the receiver is ready, the server will serve , although the receiver must play to the pace of the server. For a service to be legal, the ball must travel over the net without touching it into the diagonally opposite service box. If the ball hits the net but lands in the service box, this

6555-404: The baselines, dividing it into two equal ends. It is held up by either a cord or metal cable of diameter no greater than 0.8 cm ( 1 ⁄ 3  in). The net is 3 feet 6 inches (1.07 m) high at the posts and 3 feet (0.91 m) high in the centre. The net posts are 3 feet (0.91 m) outside the doubles court on each side or, for a singles net, 3 feet (0.91 m) outside

6670-510: The best known English machines was the Ransomes ' Automaton, available in chain- or gear-driven models. Numerous manufacturers entered the field with petrol (gasoline) engine-powered mowers after the start of the 20th century. In 1902, The first was produced by Ransomes. JP Engineering of Leicester, founded after World War I , produced a range of very popular chain-driven mowers. About this time, an operator could ride behind animals that pulled

6785-505: The blades of the spinning cylinder to contact the horizontal cutting bar. When the reel touches the cutting bar the work required by the mower increases dramatically. When the gap between the blades is less than the thickness of the grass blades, a clean cut can still be made without additional friction. When the gap is greater than the thickness of the grass blades, grass will slip through the gap uncut. Reel mowers also have more difficulty mowing over uneven terrain. There are many variants of

6900-428: The boundary of the area to be trimmed and in some cases to locate a recharging dock. Robotic mowers are capable of maintaining up to 30,000 m (320,000 sq ft) of grass. Robotic lawn mowers are increasingly sophisticated, are self-docking and some contain rain sensors if necessary, nearly eliminating human interaction. Robotic lawn mowers represented the second largest category of domestic robots used by

7015-442: The chair umpire in tournament play. A break point occurs if the receiver, not the server , has a chance to win the game with the next point. Break points are of particular importance because serving is generally considered advantageous, with servers being expected to win games in which they are serving. A receiver who has one (score of 30–40 or advantage), two (score of 15–40) or three (score of love–40) consecutive chances to win

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7130-544: The clippings to small pieces. This function has the advantages of forgoing the additional work collecting and disposing of grass clippings while reducing lawn waste in such a way that also creates convenient compost for the lawn, forgoing the expense and adverse environmental effect of fertilizer . Mower manufacturers market their mowers as side discharge, 2-in-1, meaning bagging and mulching or side discharging and mulching, and 3-in-1, meaning bagging, mulching, and side discharge. Most 2-in-1 bagging and mulching mowers require

7245-562: The collection of the National Museum of Australia . The Victa mower is regarded as something of an Australian icon , appearing en masse, in simulated form, at the opening of the Sydney Olympic Games in 2000. The hover mower, first introduced by Flymo in 1964, is a form of rotary mower using an air cushion on the hovercraft principle. A cylinder mower or reel mower carries a fixed, horizontal cutting blade at

7360-424: The court). The short mark in the centre of each baseline is referred to as either the hash mark or the centre mark. The outermost lines that make up the length are called the doubles sidelines; they are the boundaries for doubles matches. The lines to the inside of the doubles sidelines are the singles sidelines, and are the boundaries in singles play. The area between a doubles sideline and the nearest singles sideline

7475-409: The credit for the development of modern tennis." According to Honor Godfrey, museum curator at Wimbledon, Wingfield "popularized this game enormously. He produced a boxed set which included a net, poles, rackets, balls for playing the game – and most importantly you had his rules. He was absolutely terrific at marketing and he sent his game all over the world. He had very good connections with the clergy,

7590-549: The cut grass is dropped onto the ground and then collected by a set of rotating bristles, allowing even long, wet grass to be collected. Rotary mowers with internal combustion engines come in three price ranges. Low priced mowers use older technology, smaller motors, and lighter steel decks. These mowers are targeted at the residential market and typically price is the most important selling point. Professional grass-cutting equipment, used by large establishments such as universities, sports stadiums and local authorities, usually take

7705-450: The cutting advantages of professional cylinder mowers. Their distinct environmental benefits, both in noise and air pollution, are also strong selling points, something not lost on many international zoos, animal sanctuaries and exclusive hotel groups. The basic push mower mechanism is also used in gangs towed behind a tractor . The individual mowers are arranged in a "v" behind the tractor with each mower's track slightly overlapping that of

7820-490: The cutting cylinder and the main or land roller could be raised or lowered to alter the height of cut. The grass clippings were hurled forward into a tray-like box. It was soon realized, however, that an extra handle was needed in front to help pull the machine along. Overall, these machines were remarkably similar to modern mowers. Two of the earliest Budding machines sold went to Regent's Park Zoological Gardens in London and

7935-512: The cylinder mower. Push mowers have no engine and are usually used on smaller lawn areas where access is a problem, where noise pollution is undesirable and where air pollution is unwanted. As the mower is pushed along, the wheels drive gears which rapidly spin the reel. Typical cutting widths are 10 to 16 inches (250 to 410 mm). Advances in materials and engineering have resulted in these mowers being very light and easy to operate and manoeuvre compared with their predecessors while still giving all

8050-423: The depleted batteries can be quickly swapped with recharged batteries. Cordless mowers have the maneuverability of a gasoline-powered mower and the environmental friendliness of a corded electric mower, but they are more expensive and come in fewer models (particularly the self-propelling type) than either. The eventual disposal of worn-out batteries is problematic (though some manufacturers offer to recycle them), and

8165-420: The desired height of cut. Over this is a fast-spinning reel of blades which force the grass past the cutting bar. Each blade in the blade cylinder forms a helix around the reel axis, and the set of spinning blades describes a cylinder. Of all the mowers, a properly adjusted cylinder mower makes the cleanest cut of the grass, and this allows the grass to heal more quickly. The cut of a well-adjusted cylinder mower

8280-402: The end of 2005. In 2012, the growth of robotic lawn mower sales was 15 times that of the traditional styles. Tractor pulled mowers are usually in the form of an attachment to a tractor . The attachments can simply function by the movement of the tractor similar to manual push cylinder mowers, but also sometimes may have powered moving blades. They are commonly mounted on either the side or

8395-448: The engine also propels the mower. Much smaller and lighter variants of the roller mower are sometimes used for small patches of ornamental lawns around flower beds, and these have no engine. Riding reel mowers are also produced. Typically, the cutting reels are ahead of the vehicle's main wheels, so that the grass can be cut before the wheels push the grass over onto the ground. The reels are often hydraulically powered. The main parts of

8510-405: The engine drives both the cylinder and the rear roller. Some variants have only three blades in a reel spinning at great speed, and these models are able to cut grass which has grown too long for ordinary push mowers. One type of reel mower, now largely obsolete, was a powered version of the traditional side-wheel push mower, which was used on residential lawns. An internal combustion engine sat atop

8625-466: The first lawn mower in Britain in 1830 is believed to have been a catalyst for the preparation of modern-style grass courts, sporting ovals, playing fields, pitches, greens, etc. This in turn led to the codification of modern rules for many sports, including lawn tennis, most football codes, lawn bowls and others. Between 1859 and 1865, Harry Gem , a solicitor, and his friend Augurio Perera developed

8740-567: The first steam-powered lawn mower in 1893. His machine burned petrol and/or paraffin ( kerosene ) as fuel. These were heavy machines that took several hours to warm up to operating pressure. After numerous advances, these machines were sold by the Stott Fertilizer and Insecticide Company of Manchester and Sumner. The company they both controlled was called the Leyland Steam Motor Company . Around 1900, one of

8855-494: The following guidelines; The rules regarding rackets have changed over time, as material and engineering advances have been made. For example, the maximum length of the frame had been 32 inches (81 cm) until 1997, when it was shortened to 29 inches (74 cm). Many companies manufacture and distribute tennis rackets. Wilson, Head and Babolat are three of the most commonly used brands; however, many more companies exist. The same companies sponsor players to use these rackets in

8970-471: The form of much larger, dedicated, ride-on platforms or attachments that can be mounted on, or behind, a standard tractor unit (a "gang-mower"). Either type may use rotating-blade or cylindrical-blade type cutters, although high-quality mowed surfaces demand the latter. Wide-area mowers (WAMs) are commercial grade mowers which have decks extended to either side, many to 12 feet (3.7 m). These extensions can be lowered for large area mowing or raised to decrease

9085-403: The game (tying the set 6–6) a tiebreak is played. A tiebreak, played under a separate set of rules, allows one player to win one more game and thus the set, to give a final set score of 7–6. A tiebreak game can be won by scoring at least seven points and at least two points more than the opponent. In a tiebreak, two players serve by 'ABBA' system which has been proven to be fair. If a tiebreak

9200-411: The game has break point , double break point or triple break point , respectively. If the receiver does, in fact, win their break point, the game is awarded to the receiver, and the receiver is said to have converted their break point. If the receiver fails to win their break point it is called a failure to convert. Winning break points, and thus the game, is also referred to as breaking serve , as

9315-550: The hand. Louis X of France was a keen player of jeu de paume ("game of the palm"), which evolved into real tennis , and became notable as the first person to construct indoor tennis courts in the modern style. Louis was unhappy with playing tennis outdoors and accordingly had indoor, enclosed courts made in Paris "around the end of the 13th century". In due course this design spread across royal palaces all over Europe. In June 1316 at Vincennes , Val-de-Marne, and following

9430-564: The hopes that the company name will become better known by the public. There are multiple types of tennis strings, including natural gut and synthetic stings made from materials such as nylon , kevlar , or polyester . The first type of tennis strings available were natural gut strings, introduced by Babolat. They were the only type used until synthetic strings were introduced in the 1950s. Natural gut strings are still used frequently by players such as Roger Federer. They are made from cow intestines, and provide increased power, and are easier on

9545-447: The large machines. These were the first riding mowers. The first United States patent for a reel lawn mower was granted to Amariah Hills on January 12, 1868. In 1870, Elwood McGuire of Richmond, Indiana designed a human-pushed lawn mower, which was very lightweight and a commercial success. John Burr patented an improved rotary-blade lawn mower in 1899, with the wheel placement altered for better performance. Amariah Hills went on to found

9660-565: The law profession, and the aristocracy and he sent thousands of sets out in the first year or so, in 1874." The world's oldest annual tennis tournament took place at Leamington Lawn Tennis Club in Birmingham in 1874. This was three years before the All England Lawn Tennis and Croquet Club would hold its first championships at Wimbledon, in 1877. The first Championships culminated in a significant debate on how to standardise

9775-551: The mains (the vertical strings) and the crosses (the horizontal strings). This is most commonly done with two different strings that are made of different materials, but can also be done with two different types of the same string. A notable example of a player using hybrid strings is Roger Federer, using natural gut strings in his mains and polyester strings in his crosses. Tennis balls were originally made of cloth strips stitched together with thread and stuffed with feathers. Modern tennis balls are made of hollow vulcanized rubber with

9890-542: The major (amateur) tournaments. In 1968, commercial pressures and rumours of some amateurs taking money under the table led to the abandonment of this distinction, inaugurating the Open Era , in which all players could compete in all tournaments, and top players were able to make their living from tennis. With the beginning of the Open Era, the establishment of an international professional tennis circuit, and revenues from

10005-574: The major championships of the day. The World Grass Court Championships were awarded to Great Britain. The World Hard Court Championships were awarded to France; the term "hard court" was used for clay courts at the time. Some tournaments were held in Belgium instead. And the World Covered Court Championships for indoor courts were awarded annually; Sweden, France, Great Britain, Denmark, Switzerland and Spain each hosted

10120-422: The most successful of these being Ransomes of Ipswich, which began making mowers as early as 1832. His machine was the catalyst for the preparation of modern-style sporting ovals, playing fields (pitches), grass courts , etc. This led to the codification of modern rules for many sports, including for football , lawn bowls , lawn tennis and others. It took ten more years and further innovations to create

10235-417: The motors in some cordless mowers tend to be less powerful than gasoline motors of the same total weight (including batteries). Lawn mowers powered by propane were also manufactured by Lehr. In hand-powered lawn mowers, the reel is attached to the mower's wheels by gears, so that when the mower is pushed forward, the reel spins several times faster than the plastic or rubber-tired wheels turn. Depending on

10350-471: The mower in front of it. Gang mowers are used over large areas of turf such as sports fields or parks. A gasoline engine or electric motor can be added to a cylinder mower to power the cylinder, the wheels, the roller, or any combination of these. A typical arrangement on electric powered machines for residential lawns is for the motor to power the cylinder while the operator pushes the mower along. The electric models can be corded or cordless. On petrol machines

10465-399: The net. A player or team cannot hit the ball twice in a row. The ball must travel over or round the net into the other players' court. A ball that hits the net during a rally is considered a legal return as long as it crosses into the opposite side of the court. The first player or team to fail to make a legal return loses the point. The server then moves to the other side of the service line at

10580-406: The official ITF list of approved tennis balls. Tennis is played on a rectangular, flat surface. The court is 78 feet (23.77 m) long, and 27 feet (8.2 m) wide for singles matches and 36 ft (11 m) for doubles matches. Additional clear space around the court is required in order for players to reach overrun balls. A net is stretched across the full width of the court, parallel with

10695-407: The older racket sport today called real tennis . The rules of modern tennis have changed little since the 1890s. Two exceptions are that until 1961 the server had to keep one foot on the ground at all times, and the adoption of the tiebreak in the 1970s. A recent addition to professional tennis has been the adoption of electronic review technology coupled with a point-challenge system, which allows

10810-414: The placement of the reel, these mowers often cannot cut grass very close to lawn obstacles. Hover mowers are powered rotary push lawn mowers that use an impeller above the spinning blades to drive air downward, thereby creating an air cushion that lifts the mower above the ground. The operator can then easily move the mower as it floats over the grass. Hover mowers are necessarily light in order to achieve

10925-488: The player who is in the lead in the game needs only one more point to win the game. The terminology is extended to sets (set point), matches (match point), and even championships (championship point). For example, if the player who is serving has a score of 40–love, the player has a triple game point (triple set point, etc.) as the player has three consecutive chances to win the game. Game points, set points, and match points are not part of official scoring and are not announced by

11040-410: The player's scores equal at 40 apiece, the score is not called out as "40–40", but rather as "deuce". If at least three points have been scored by each side and a player has one more point than his opponent, the score of the game is "advantage" for the player in the lead. During informal games, advantage can also be called "ad in" or "van in" when the serving player is ahead, and "ad out" or "van out" when

11155-449: The receiver has disrupted, or broken the natural advantage of the server. If in the following game the previous server also wins a break point it is referred to as breaking back . Except where tiebreaks apply, at least one break of serve is required to win a set (otherwise a two-game lead would never occur). Another, however informal, tennis format is called Canadian doubles . This involves three players, with one person playing against

11270-413: The receiving player is ahead; alternatively, either player may simply call out "my ad" or "your ad". The score of a tennis game during play is always read with the serving player's score first. In tournament play, the chair umpire calls the point count (e.g., "15–love") after each point. At the end of a game, the chair umpire also announces the winner of the game and the overall score. A set consists of

11385-402: The reel housing and drove the wheels, usually through a belt. The wheels in turn drove the reel, as in the push mower. Greens mowers are used for the precision cutting of golf greens and have a cylinder made up of at least eight, but normally ten, blades. The machine has a roller before and after the cutting cylinder which smooths the freshly cut lawn and minimizes wheel marks. Due to the weight,

11500-603: The rules. In the United States in 1874, Mary Ewing Outerbridge , a young socialite, returned from Bermuda with a sphairistikè set. She became fascinated by the game of tennis after watching British army officers play. She laid out a tennis court at the Staten Island Cricket Club at Camp Washington, Tompkinsville, Staten Island , New York. The first American National championship was played there in September 1880. An Englishman named O.E. Woodhouse won

11615-597: The sale of television rights, tennis's popularity has spread worldwide, and the sport has shed its middle-class English-speaking image (although it is acknowledged that this stereotype still exists). In 1954, Van Alen founded the International Tennis Hall of Fame , a nonprofit museum in Newport, Rhode Island. The building contains a large collection of tennis memorabilia as well as a hall of fame honouring prominent members and tennis players from all over

11730-700: The saw blade of the "Pulp Saw" with a double-edged blade and a cutter deck, converting the "Pulp Saw" into the first ever out-front rotary mower. One company that produced rotary mowers commercially was the Australian Victa company, starting in 1952. Its mowers were lighter and easier to use than similar ones that had come before. The first Victa mowers were made at Mortlake , an inner suburb of Sydney , by local resident Mervyn Victor Richardson. He made his first model out of scrap in his garage. The first Victa mowers were then manufactured, going on sale on 20 September 1952. The new company, Victa Mowers Pty Ltd,

11845-403: The service boxes; depending on a player's position, they have to hit the ball into one of these when serving. A ball is out only if none of it has hit the area inside the lines, or the line, upon its first bounce. All lines are required to be between 1 and 2 inches (25 and 51 mm) in width, with the exception of the baseline which can be up to 4 inches (100 mm) wide, although in practice it

11960-505: The shortest time possible. The largest multi-gang (multi-blade) mowers are mounted on tractors and are designed for large expanses of grass such as golf courses and municipal parks, although they are ill-suited for complex terrain. The lawn mower was invented in 1830 by Edwin Beard Budding of Stroud , Gloucestershire, England. Budding's mower was designed primarily to cut the grass on sports grounds and extensive gardens, as

12075-427: The side or rear of the housing where the cut grass is expelled, as do most rotary lawn mowers. Some have a grass catcher attachment at the opening to bag the grass clippings. Mulching mowers use special mulching blades which are available for rotary mowers. The blade is designed to keep the clippings circulating underneath the mower until the clippings are chopped quite small. Other designs have twin blades to mulch

12190-416: The singles court on each side. The modern tennis court owes its design to Major Walter Clopton Wingfield . In 1873, Wingfield patented a court much the same as the current one for his stické tennis (sphairistike). This template was modified in 1875 to the court design that exists today, with markings similar to Wingfield's version, but with the hourglass shape of his court changed to a rectangle. Tennis

12305-617: The singles title, and a silver cup worth $ 100, by defeating Canadian I. F. Hellmuth . There was also a doubles match which was won by a local pair. There were different rules at each club. The ball in Boston was larger than the one normally used in New York. On 21 May 1881, the oldest nationwide tennis organization in the world was formed, the United States National Lawn Tennis Association (now

12420-444: The spread of the invention. Lawn mowers became a more efficient alternative to the scythe and domesticated grazing animals. Manufacture of lawn mowers took off in the 1860s. By 1862, Ferrabee's company was making eight models in various roller sizes. He manufactured over 5000 machines until production ceased in 1863. The first grass boxes were flat trays but took their present shape in the 1860s. James Sumner of Lancashire patented

12535-467: The start of a new point. A game consists of a sequence of points played with the same player serving. A game is won by the first player to have won at least four points in total and at least two points more than the opponent. The running score of each game is described in a manner peculiar to tennis: scores from zero to three points are described as "love", "15", "30", and "40", respectively. If at least three points have been scored by each player, making

12650-468: The tournament. At a meeting held on 16 March 1923 in Paris, the title "World Championship" was dropped and a new category of "Official Championship" was created for events in Great Britain, France, the US and Australia – today's Grand Slam events. The impact on the four recipient nations to replace the "world championships" with "official championships" was simple in a general sense: each became

12765-466: The widespread application of the vertical shaft single cylinder gasoline/petrol engine. In the United States this development paralleled the market penetration of companies such as the Briggs & Stratton company of Wisconsin. Most rotary push mowers are powered by internal combustion engines . Such engines are usually four-stroke engines , used for their greater torque and cleaner combustion (although

12880-528: The world. Part of the appeal of tennis stems from the simplicity of equipment required for play. Beginners need only a racket and balls. The components of a tennis racket include a handle, known as the grip, connected to a neck which joins a roughly elliptical frame that holds a matrix of tightly pulled strings. For the first 100 years of the modern game, rackets were made of wood and of standard size, and strings were of animal gut . Laminated wood construction yielded more strength in rackets used through most of

12995-554: Was a big fan of this game, which is now known as real tennis . An epitaph in St Michael's Church, Coventry , written c.  1705 , read, in part: Here lyes an old toss'd Tennis Ball: Was racketted, from spring to fall, With so much heat and so much hast, Time's arm for shame grew tyred at last. During the 18th and early 19th centuries, as real tennis declined, new racket sports emerged in England. The invention of

13110-512: Was incorporated on 13 February 1953. The venture was so successful that by 1958 the company moved to much larger premises in Parramatta Road , Concord , and then to Milperra , by which time the mower incorporated an engine, designed and manufactured by Victa, which was specially designed for mowing, rather than employing a general-purpose engine bought from outside suppliers. Two Victa mowers, from 1958 and 1968 respectively, are held in

13225-460: Was not until the 16th century that rackets came into use and the game began to be called "tennis", from the French term tenez , which can be translated as "hold!", "receive!" or "take!", an interjection used as a call from the server to his opponent. It was popular in England and France, although the game was only played indoors, where the ball could be hit off the wall. Henry VIII of England

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