Vehicle speed regulating device

Claim 1

IN A CONTROL DEVICE FOR REGULATING THE SPEED OF AN AUTOMOTIVE VEHICLE INCLUDING AN INTERNAL COMBUSTION ENGINE HAVING AN INTAKE PASSAGE FOR THE FLOW FAIR THERETHROUGH, A THROTTLE OPERATIVELY MOUNTED IN SAID PASSAGE WHEREBY CLOSURE OF SAID THROTTLE INCREASES THE VACUUM IN SAID PASSAGE ON THE DOWNSTREAM SIDE OF THE THROTTLE AND CONVERSELY, THE COMBINATION OF MEANS TO EFFECT VEHICLE SPEED-CONTROLLING MOVEMENTS OF SAID THROTTLE COMPRISING, A PRESSURE-RESPONSIVE MEMBER OPERATIVELY CONNECTED TO SAID THROTTLE FOR ACTUATION THEREOF, A VACUUM CIRCUIT FOR THE FLOW OF AIR THERETHROUGH AND HAVING INLET AND OUTLET RESTRICTIONS THEREIN, SAID CIRCUIT COMMUNICATING WITH SAID PRESSURE-RESPONSIVE MEMBER ON ONE SIDE THEREOF AT A POINT BETWEEN SAID TWO RESTRICTIONS TO PROVIDE VACUUM ACTING ON SAID PRESSURE-RESPONSIVE MEMBER IN A THROTTLE-OPENING DIRECTION, SAID CIRCUIT HAVING ITS OUTLET COMMUNICATING WITH SAID INTAKE PASSAGE ON THE DOWNSTREAM SIDE OF SAID THROTTLE, SAID INLET RESTRICTION COMPRISING VALVE MEANS INCLUDING A FIRST MOVABLE VALVE PORTION TO MODULATE THE RESTRICTIVE EFFECT OF SAID INLET RESTRICTION FOR CONTROLLING SAID VACUUM ACTING ON SAID PRESSURE-RESPONSIVE MEMBER TO