Adjustable timer having rotatinc cam and wide range variable dwell

Abstract

Abstract ASSEMBLY TO ASSUME ITS NORMAL DEACTUATED POSITION IN RESPONSE TO ENGAGEMENT WITH SAID SWITCH RESETTING MEANS WHEREBY SAID SWITCH CONTACT ASSEMBLY MAY BE SUCCESSIVELY, REPEATABLY ACTUATED AT THE SAME ANGULAR POSITION OF SAID SHAFT AND SAID CAM AS ROTATION THEREOF IS EFFECTED. 1. ADJUSTABLE TIMING APPARATUS HAVING VARIABLE DWELL SWITCHING COMPRISING IN COMBINATION, A. A ROTATABLE SHAFT, B. AT LEAST ONE CAM MEANS MOUNTED ON SAID SHAFT FOR ROTATION THEREWITH, SAID CAM MEANS HAVING A PERIPHERAL SURFACE INCLUDING A SUBSTANTIAL CIRCUMFERENTIALLY ELONGATED PORTION OF CONSTANTLY VARYING RADIUS AND A SHORT CIRCUMFERENTIALLY AND RADIALLY EXTENDING SWITCH RESETTING MEANS FOR NON-CONSTANTLY VARYING RADIUS DISPOSED INTERMEDIATE THE PORTIONS OF LARGEST AND SMALLEST RADIUS ON SAID SUBSTANTIAL CIRCUMFERENTIALLY ELONGATED PORTION SAID LAST NAMED MEANS BEING OPERABLE TO RESET A SWITCH CONTACT ASSEMBLY SUBSEQUENT TO ACTUATION THEREOF, C. MEANS OPERABLE TO ROTATE SAID SHAFT, D. AT LEAST ONE SPRING SWITCH CONTACT ASSEMBLY HAVING A NORMAL DEACTUATED POSITION, AND AN ACTUATED POSITION, AND INCLUDING A CAM FOLLOWER IN ENGAGEMENT WITH THE PERIPHERAL SURFACE OF SAID CAM, SAID CAM FOLLOWER BEING OPERABLE TO ACTUATE SAID SWITCH CONTACT ASSEMBLY AT A PREDETERMINED RADIAL POSITION OF SAID CAM AND SAID SHAFT AND TO RESET AND DEACTUATE SAID SWITCH CONTACT ASSEMBLY BY SAID RESETTING MEANS CAUSING SAID SWITCH CONTACT ASSEMBLY TO MOVE PAST ITS NORMAL DEACTUATED POSITION BEFORE ALLOWING THE SWITCH CONTACT

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