Television camera sync generator which derives sync signals from the horizontal and vertical sweep circuits

Claim 1

A SYNCHRONIZING SIGNAL GENERATING CIRCUIT FOR A TELEVISION SYSTEM HAVING A HORIZONTAL SWEEP GENERATOR, A VERTICAL SWEEP GENERATOR, AND A BLACK LEVEL CLIPPER CIRCUIT FOR PASSING BLANKING SIGNALS BELOW A PRESET DC LEVEL AND GIVING A FLAT TOP TO THE OUTPUT BLANKING SIGNAL, SAID SYSTEM INCLUDING IN COMBINATION, A PULSE AMPLIFIER HAVING INPUT CIRCUIT MEANS AND OUTPUT CIRCUIT MEANS, SAID OUTPUT CIRCUIT MEANS COUPLED TO THE BLACK LEVEL CLIPPER CIRCUIT, A FIRST PULSE PROCESSING CIRCUIT COUPLED TO THE HORIZONTAL SWEEP GENERATOR, A SECOND PULSE PROCESSING CIRCUIT FOR FORMING PULSE SIGNALS OF PREDETERMINED WIDTH COUPLED TO THE VERTICAL SWEEP GENERATOR, SAID FIRST PULSE PROCESSING CIRCUIT AND SAID SECOND PULSE PROCESSING CIRCUIT COUPLED TO SAID INPUT CIRCUIT, SAID FIRST PULSE PROCESSING CIRCUIT INCLUDING DIFFERENTIATOR MEANS AND CLIPPING MEANS FOR FORMING DELAYED SPIKES WITH PREDETERMINED BASE WIDTH, SAID DELAYED SPIKES AND SAID PULSE SIGNALS APPLIED TO SAID INPUT CIRCUIT MEANS FOR COMPOSITION BY ADDING, AND SUPPLIED TO SAID PULSE AMPLIFIER FOR PRODUCING FLAT TOPPED PULSES WHICH PULSES BEING COMBINED WITH THE BLANKING SIGNALS PRODUCE BLANKING PULSES WITH SYNCHRONIZING PULSES AT THE TOP HAVING A PREDETERMINED FRONT AND BACK PORCH.