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The Adams & Richards engine featured one working cylinder plus another air-compressing cylinder attached to the same crankshaft. Compressed air and fuel were mixed in a separate chamber and then introduced into the engine cylinder. Ignition was by a constant flame igniter. Fuel consumption was claimed to be about 0.2 gallons of kerosene per. horsepower hour. By 1889 this engine was being built at Binghamton, New York, exclusively by Binghamton Hydraulic Power Company. By the early 1890s, it disappeared from the market.
On March 31, 1888, George M. Richards applied for a patent on his hydrocarbon engine. Letters Patent was granted on March 12, 1889, as No. 399,348. An article in the American Machinist of September 10, 1887, notes that Mr. Richards had devoted all his energies over the past eleven years to developing this engine. Als noted was the fact that eighteen engines were in operation in the New York City area at the time.
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