Photosensitive two state circuits and systems

Claim 1

A SWITCHING SYSTEM FOR PROVIDING A SEQUENCE OF TIMED PULSES COMPRISING A PAIR OF TWO STATE CIRCUITS, EACH OF SAID TWO STATE CIRCUITS INCLUDING A FIRST VOLTAGE RESPONSIVE LIGHT SOURCE, A CAPACITOR CONNECTED TO BE ENERGIZED THROUGH A RESISTIVE CIRCUIT PATH CONCURRENTLY WITH THE ENERGIZATION OF SAID FIRST LIGHT SOURCE, A SECOND VOLTAGE RESPONSIVE LIGHT SOURCE CONNECTED IN PARALLEL WITH SAID CAPACITOR FOR ILLUMINATION WHEN A SUFFICIENT CHARGE VOLTAGE IS ACHIEVED ON SAID CAPACITOR, A FIRST PHOTORESPONSIVE DEVICE POSTIONED TO RECEIVE ILLUMINATION FROM SAID SECOND LIGHT SOURCE AND CONNECTED IN PARALLEL WITH SAID FIRST LIGHT SOURCE, SAID FIRST PHOTORESPONSIVE DEVICE BEING OPERABLE WHEN ILLUMINATED TO EXTINGUISH SAID FIRST LIGHT SOURCE, A SECOND PHOTO-RESPONSIVE DEVICE RESPONSIVE TO ILLUMINATION FROM SAID FIRST LIGHT SOURCE OF EACH TWO-STATE CIRCUIT AND CONNECTED IN PARALLEL WITH SAID CAPACITOR OF THE OTHER TWO-STATE CIRCUIT TO PROVIDE, WHEN ILLUMINATED, A DISCHARGE PATH FOR SAID LAST-RECITED CAPACITOR, AND AN OUTPUT PHOTORESPONSIVE DEVICE RESPONSIVE TO ILLUMINATION FROM ONE OF SAID FIRST LIGHT SOURCES FOR PROVIDING SAID SEQUENCE OF TIMED PULSES.