Motion detecting device

Claim 1

IN A DEVICE OF THE CLASS DESCRIBED, IN COMBINATION, A SYSTEM OF ELEMENTS THAT MOVES IN ACCORDANCE WITH A QUANTITY BEING MEASURED, A STATIONARY FRAME SUPPORTING THE SYSTEM OF ELEMENTS, AND MEANS FOR DETECTING MOVEMENTS OF SAID ELEMENTS IN EXCESS OF A PRESCRIBED DISTANCE AND VELOCITY COMPRISING MEANS FOR GENERATING AN ELECTRICAL IMPULSE FOR EACH INCREMENT OF MOVEMENT OF THE SYSTEM RELATIVE TO THE FRAME, CIRCUIT MEANS RESPONSIVE TO SAID ELECTRICAL IMPULSES FOR GENERATING ELECTRICAL OUTPUT PULSES OF CONSTANT AMPLITUDE AND TIME DURATION, SAID TIME DURATION BEING GENERALLY EQUAL TO THE TIME BETWEEN PULSES AT SAID PRESCRIBED VELOCITY, SAID CIRCUIT MEANS BEING NONRESPONSIVE TO IMPULSES OCCURRING DURING THE PRODUCTION OF AN OUTPUT PULSE WHEREBY THE MAXIMUM FREQUENCY OF THE OUTPUT PULSES IS LIMITED TO A FREQUENCY CORRESPONDING TO SAID PRESCRIBED VELOCITY, MEANS FOR INTEGRATING ELECTRICAL CHARGES CORRESPONDING TO DISCHARGE THE INTEGRATOR MEANS, CONTINUOUSLY TENDING TO DISCHARGE THE INTEGRATOR MEANS, AND OUTPUT CONTROL MEANS CONNECTED TO SAID INTEGRATOR AND ADAPTED TO PROVIDE AN OUTPUT SIGNAL WHEN SAID INTEGRATOR ACCUMULATES A PREDETERMINED CHARGE.