Multiple speed timing device with improved drive

Claim 1

A TIMING DEVICE COMPRISING A HOUSING; CAM SHAFT MEANS ROTATABLY SUPPORTED WITHIN SAID HOUSING AND INCLUDING AN OUTER SLEEVE AND AN INNER SHAFT ROTATABLE AS A UNIT AND MOUNTED FOR LIMITED RELATIVE AXIAL MOVEMENT; A PLURALITY OF SPACED DISC CAMS CARRIED BY SAID CAM SHAFT MEANS; AN END PLATE CAM CARRIED BY SAID SHAFT; A PLURALITY OF CONTROL MEMBERS DEFINING SWITCH MEANS, CAM FOLLOWER MEANS EACH ENGAGING A TRACK OF SAID CAMS AND CONNECTED TO SAID CONTROL MEMBERS TO ACTUATE SAID CONTROL MEMBERS; A CONTROL MEMBER RESPONSIVE TO AXIAL MOVEMENT OF SAID END CAM; AN ELECTRICAL DRIVE MOTOR HAVING A MOTOR PINION; A DRIVEN GEAR MOUNTED TO DRIVE SAID CAM SHAFT MEANS AND DEFINING A RATCHET GEAR; GEAR TRAIN MEANS INTERCONNECTING SAID PINION AND SAID DRIVEN GEAR AND INCLUDING A RATCHET COUPLING FOR PERMITTING MANUAL ROTATION OF SAID CAM SHAFT MEANS IN ONE DIRECTION ONLY; AND LOCK MEANS ENGAGING SAID RACHET COUPLING OPERATED BY THE AXIAL POSITION OF SAID INNER SHAFT FOR PRVENTING MANUAL ROTATION OF SAID CAM SHAFT MEANS IN SAID ONE DIRECTION.