Who Invented Automatic Transmissions For Cars?

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In 1921, the first automatic transmission was invented by a Canadian steam engineer, Alfred Horner Munro. Alfred Horner Munro ended up with the patent to back-up his claim, a Canadian patent in 1923 followed by similar in the UK (1924) and United States (1927).

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According to Tech Historian, the automatic transmission was first developed in the early 1900s by Karl Benz, who also invented the modern automobile. However, General Motors Corporation employees Edward A. Deeds and Charles F. Kettering developed the first automatic transmission widely employed in automobiles in 1924.

Referred to as the "horseless carriage gearbox" at the time, the first


The automatic gearbox, a significant invention in the automotive industry, was the brainchild of two inventors - Alfred Horner Munro of Regina, Canada, and Oscar Adolphson, a native of Sweden. Munro, a steam engineer, patented an early version of the automatic gearbox in 1923 which was pneumatic rather than hydraulic.

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Earl A. Thompson Earl Avery Thompson in his youth (unknown year) Earl Avery Thompson (July 1, 1891 - April 20, 1967) was an American engineer and inventor who had a goal to make driving the automobile safer by reducing the effort required to shift the manual transmission of the day.

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Fernando Lehly Lemos and José Braz Araripe, two engineers from Brazil, created an hydraulic transmission in 1932. The model was bought by GMC, which turned it into a Hydra-Matic gearbox. The mass production of this transmission in 1940 altered the direction of the car industry.

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The Evolution of Automatic Transmissions: From Hydraulics to Electronics. Once considered the inferior option by true car and truck enthusiasts, automatic transmissions are now common even among serious gearheads, delivering performance that even manual transmission can't match. Many modern vehicles are only available with an automatic gearbox — and in most cases, they are more efficient.

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The inventor was a Canadian engineer by the name of Alfred Munro. His first-generation automatic transmission made use of compressed air, a far cry from those that make use of transmission fluid in the modern era. The first automatic transmission developed that made use of hydraulic fluid was the Hydra-Matic, created at General Motors.

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The first automatic transmission was invented in 1921 by a Canadian steam engineer, Alfred Horner Munro. Munro designed his device to use compressed air rather than hydraulic fluid so it lacked power and never became sold commercially.

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Inventions Richard Spikes patented or developed the following inventions: U.S. Patent 928,813, Beer Tapper (1908) U.S. Patent 972,277, Billiard Cue Rack (1910) U.S. Patent 1,362,197, U.S. Patent 1,362,198 Continuous contact trolley pole (1919) U.S. Patent 1,441,383 Brake Testing Machine (1923) U.S. Patent 1,461,988 Pantograph (1923)

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The automated gearbox, also acknowledged as the automatic transmission, was not invented by a solitary person. Rather, its improvement and evolution involved the contributions of a number of inventors and engineers more than time.

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Early Gearboxes. The first gearboxes were developed for use in horse-drawn carriages in the late 18th century. These early gearboxes allowed drivers to adjust the speed of their carriage by manually selecting different gears. However, these early gearboxes were not very efficient and often required a great deal of physical effort to operate.

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Other historians consider the first automatic transmission to be the one invented in 1923 by Alfred Horner Munro, a Canadian engineer. Munro was primarily a steam engineer, and his design was unique in that it used compressed air instead of hydraulic fluid to actuate the gears.

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The first synchromesh gearbox was pioneered by General Motors and appeared with the 1928 Cadillac. There have been many different designs of synchromesh transmissions since then, but, for the most part, they all owe their DNA to Earl Thompson from General Motors. What the synchromesh transmission allowed was the changing of gears by the driver.

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In France, Louis-Rene Panhard and Emile Levassor developed what they thought was a form of automatic transmission, but when they attempted to run a demonstration in 1894 the unit broke. They ended up talking through the theory of how it might work via a chalkboard demonstration. Good in theory…

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History of Building First Automatic Car Before the Sturtevant brothers of Boston attempted to build a horseless carriage gearbox in 1904, the manual transmission was the only option for driving. They invented a two-speed gearbox and engine-driven flyweights, which controlled the gear selection.

Who Invented Automatic Transmissions For Cars?


An automatic transmission (sometimes abbreviated AT) is a multi-speed transmission used in motor vehicles that does not require any input from the driver to change forward gears under normal driving conditions.