APPARATUS FOR CONVERTING ROTATIONAL DISPLACEMENT INTO LINEAR DISPLACEMENT

摘要

Apparatus for converting rotational displacement into linear displacement comprising a rotatable member and two sets of stationary members bearing each against one surface of said rotatable member. The rotatable member has two surfaces comprising a plurality of alternating oppositely inclined surfaces joined together to form a plurality of apices and the sets of stationary surfaces comprise posts adapted to register with one pair of oppositely inclined surfaces and one apex. For a given rotational displacement the posts contact at the same height of the inclined surfaces and the inclined surfaces are inclined in the same direction. This apparatus is useful as a means for actuating a timer to supply electrical power for a time interval while preventing accidental interruption of electrical power during the time interval.