Timing signal generator

Claim 1

APPARATUS FOR MAINTAINING THE OPERATION OF A CLOCK PULSE GENERATOR IN SYNCHRONISM WITH PULSES OF A SLOWLY VARYING FREQUENCY INCLUDING IN COMBINATION A SIGNAL CONTROLLABLE OSCILLATOR COUPLED TO THE CLOCK PULSE GENERATOR FOR PROVIDING REFERENCE PULSES FOR THE GENERATION OF CLOCK PULSES, A BISTABLE SIGNAL GENERATOR RESPONSIVE ON ONE INPUT TO THE SIGNALS OF VARYING FREQUENCY AND ON ANOTHER INPUT TO THE REFERENCE PULSES TO PROVIDE PULSES HAVING CONTROLLED DURATIONS DETERMINED BY THE TIMES OF OCCURRENCE OF SUCCESSIVE VARIABLE FREQUENCY AND REFERENCE PULSES, A CONTROL SIGNAL GENERATOR RESPONSIVE TO THE PULSES OF CONTROLLED DURATION AND COUPLED TO THE SIGNAL CONTROLLABLE OSCILLATOR FOR VARYING THE FREQUENCY OF THE OSCILLATOR, AND MEANS FOR DISABLING THE CONTROL SIGNAL GENERATOR UPON THE NON-OCCURRENCE OF ONE OF SAID VARYING FREQUENCY PULSES, THE VARIABLE DURATION PULSES FROM THE BISTABLE DEVICE AND THE SIGNAL CONTROLLABLE OSCILLATOR BEING COUPLED IN A FEEDBACK LOOP WHICH ACHIEVES EQUILIBRIUM WITH A DIFFERENT PHASE SHIFT BETWEEN THE VARYING FREQUENCY SIGNALS AND THE REFERENCE SIGNALS FOR EACH FREQUENCY.