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Robert Volker
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21,449. Volker, R. Oct. 6. Revolving-cylinder type of internal-combustion engines. Three cylinders g are mounted on a crank casing h which revolves about a fixed crank b. A four-stroke cycle is performed, and each exhaust valve cam m is rotated by a forked lever n on its ,spindle k engaging a fixed grooved cam j. The longer pin n' of the lever n makes electric contact with a conductor for igniting.