Adams

Adams and Hewitt set up the Adams Manufacturing Company, registering it on 1 April 1905. There first car was produced by the end of that year as a Adams-Hewitt. It was a "gas buggy" along the lines of an Oldsmobile and following agreement with Adams production of the car started in 1905 as the Adams-Hewitt. The car had a supposedly foolproof two, later three, speed-epicyclic transmission with a 1724 cc 10 hp single-cylinder engine located horizontally in the middle of the chassis driving the rear wheels by chain. Indeed, "Pedals to push, that's all" was used as the marque's slogan. Hewitt returned to the United States, setting up the Hewitt Motor Company of New York to manufacture similar cars under his own name and his name was dropped from the British produced cars.

In 1906 a range of more conventional cars was introduced with shaft-drive and vertical engines and from 1907 sliding mesh gearboxes. One of these was supplied to the Emperor of Abyssinia. Models offered included two- and four-cylinder ones and one of the first British V-8s; this last had a 7270 cc 35/40 hp engine based on the French Antoinette model (an aero engine for which Adams were agents). The V-8 seems to have been plagued by crankshaft breakages. The last single-cylinder cars were made in 1909.

In 1910, the company produced an advanced 16 hp four-cylinder model with front-wheel brakes; it came with compressed-air starting, tire-inflating, and jacking equipment. The "pedals-to-push" gear was still offered, as was a conventional four-speed transmission and an unusual planetary gearchange (three-speed), which was operated by a pedal that moved in a gate.

Adams also manufactured commercial vehicles, including taxicabs and three-quarter ton lorries; these were also based on Hewitt designs.