Intermittent motion drive mechanism

Claim 1

IN A MACHINE FOR PERFORMING WORKING OPERATIONS ON BLANKS OF MATERIAL IN SUCCESSIVE STAGES AT A PLURALITY OF SPACED WORKING POSITIONS, BLANK TRANSFER MEANS FOR SEQUENTIALLY AND INTERMITTENTLY FEEDING BLANKS TO AND AWAY FROM A WORK STATION, BLANK WORK MEANS AT SAID STATION FOR INTERMITTENTLY PERFORMING A WORK OPERATION ON A SAID BLANK IN TIMED SEQUENCE WITH MOVEMENT OF SAID BLANK TRANSFER MEANS, BLANK DISCHARGE MEANS FOR DISENGAGING SAID BLANK AT A DISCHARGE STATION AND INTERMITTENT MOTION DRIVE MECHANISM TO START AND INDEX MOVEMENT OF SAID BLANK TRANSFER MEANS AND STOP THE SAME AUTOMATICALLY IN TIMED SEQUENCE WITH THE WORK STROKE OF SAID BLANK WORK MEANS, MEANS FOR SELECTIVELY CONTROLLING THE TIME CYCLE OF INTERMITTENT MOVEMENT BY CHANGING THE RATE OF ACCELERATION AND THEREBY DECELERATION OF MOVEMENT WITHOUT CHANGING THE WORK STORKE TIME OF THE MACHINE, SAID FLUID MOTOR BEING CONNECTED IN A HYDRAULIC CIRCUIT, PRESSURE TO SAID MOTOR BEING VARIABLE WHEREBY THE RATE OF ACCELERATION AND DECELERATION OF THE DRIVE MEANS CAN BE VARIED.