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The company was founded by Chicagoan George M. Willis in 1917 as the Checkometer Sales Company, based out of the historic Manhattan Building in downtown Chicago. [1] Willis, however, only saw modest local success with his office machine lines.
The lack of raw materials during World War II made the manufacture of new machines difficult and expensive. [6] The first all original amusement device made by Williams was a flipperless pinball machine called Suspense (1946). During the late 1940s and early 1950s, Williams continued to make pinball machines and the occasional bat-and-ball game.
The machine could add and subtract six-digit numbers, and indicated an overflow of this capacity by ringing a bell. The adding machine in the base was primarily provided to assist in the difficult task of adding or multiplying two multi-digit numbers. To this end an ingenious arrangement of rotatable Napier's bones were mounted on it.
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Jennings & Company was a leading manufacturer of slot machines in the United States and also manufactured other coin-operated machines, including pinball machines, from 1906 to the 1980s. It was founded by Ode D. Jennings as Industry Novelty Company, Incorporated of Chicago. On the death of its founder in 1953, the company was succeeded by ...
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The Mills Novelty Company, Incorporated of Chicago was once a leading manufacturer of coin-operated machines, including slot machines, vending machines, and jukeboxes, in the United States. Between about 1905 and 1930, the company's products included the Mills Violano-Virtuoso and its predecessors, celebrated machines that automatically played ...
The Curta was conceived by Curt Herzstark in the 1930s in Vienna, Austria.By 1938, he had filed a key patent, covering his complemented stepped drum. [3] [4] This single drum replaced the multiple drums, typically around 10 or so, of contemporary calculators, and it enabled not only addition, but subtraction through nines complement math, essentially subtracting by adding.