... required. The striker mechanisms illustrated areoperated by springs, cams, magnetic force, air and vacuumchambers, and centrifugal force. The drawings show only thestriking mechanisms. Fig. 5 ... simplicity, and cost.Fig. 1 A bimetallic sensor is simple, compact, and precise.Contacts mounted on low-expansion struts determine slow make- and- break action. A shell contracts or expands with ... speed. The pump is reversible and canbe driven by a gasoline engine or electric motor. The rubber cushions withstand theaction of oil, kerosene, and gasoline, and the pump operates at any angle....