Innovation leads to early success at Cushman Motor Co.
That much is clear. Other aspects of the Cushman story are lost to time. Renowned historian C.H. Wendel in American Gasoline Engines Since 1872 identifies the two Cushman men as brothers. Several other sources attribute the early Cushman patents to Everett Cushman and his cousin, Clinton Cushman--but Clinton's name does not appear on any of the three earliest Cushman patents.
That bit of murkiness aside, it's clear that the Cushman company's early focus was on 2-cycle vertical marine engines (promoted as "the valveless, cussless motor") and their later adaptation to stationary and automotive use. In 1904, sensing the enormous market for stationary engines, Cushman introduced a 2-cycle horizontal engine. "Rated at 3 hp, it used a closed cylinder jacket as did most engines of 1904," Wendel notes. "Spark plug ignition was featured, and this along with the 2-cycle design made the engine a model of simplicity."
Built strong, but light
In 1910, Cushman launched a vertical 4 hp engine that became a popular power source for grain binders. The 4 hp vertical weighed 190 lbs, "about 50 lbs per hp," Wendel says, "at a time when most engines weighed 150-200 per hp." The 4 hp vertical remained in the Cushman line into the 1930s.
By 1914, Cushman had introduced an 8 hp vertical engine, essentially a double-cylinder version of the original 4 hp model. A 15 hp vertical unveiled a year later remained in the line into the 1930s (a 10 hp twin-cylinder was produced in the 1920s). A twin-cylinder 20 hp engine topped the line. A flyball governor on the camshaft characterized the 20 hp; all other models carried governor weights within the flywheel. The 20 hp engine was offered with a radiator; a tank-cooled version was also available.
Everett Cushman appears to have departed the company in 1919. But he left his fingerprints on engines across the country. The Cushman name is linked to Bean Spray Pump Co., San Jose, California (Bean engines appear to have been built under the supervision of E.B. Cushman. Read more about Bean Mfg. Co., on Pages 10-11 of this issue.); Fairfield Engine Co., Fairfield, Iowa (whose engines strongly resemble the Cushman vertical engine); and Pierson Mfg. Co., Topeka, Kansas (whose engines were designed by E.B. Cushman).
Tradition of innovation continues
In 1920, the Cushman company, which continued under other leadership, introduced a horizontal engine of 2-3 hp. "A radical departure from previous designs," Wendel says, it featured an open cylinder jacket with a large water hopper. The totally enclosed crankcase promoted longer life, less maintenance and less cleanup in milk houses and basements.
The Cushman Cub arrived on the scene in the late 1920s. Timken roller bearings carried the crankshaft on the Cub, greatly reducing friction, a major development in gas engine design. Cushman promoted the Cub as being "dependable power for fruit and paint sprayers, pumps, compressors, general farm and industrial demands." Many served as integral equipment on orchard spraying equipment, cement mixers and other machinery.
Cushman 4-stroke Husky engines were launched in about 1930 in 3/4, 1 and 1-1/2 hp sizes. Many were adapted to Husky light plants and Cushman's "Bob-a-Lawn" lawn mower. The company later moved into motor scooter and light vehicles, and is today a leading producer of commercial grade industrial vehicles, light utility and municipal vehicles, and passenger carts.
--Farm Collector staff
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|Date:||Aug 1, 2016|
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