Electronic photographic flash apparatus with photosensitive capacitor charge monitoring

Claim 1

ELECTRONIC PHOTOGRAPHIC FLASH APPARATUS COMPRISING A LOW VOLTAGE SOURCE, A FIRST AND A SECOND TRANSFORMER, EACH HAVING PRIMARY AND SECONDARY WINDINGS, A TRANSISTOR HAVING OUTPUT MEANS INCLUDING THE PRIMARY WINDINGS OF SAID FIRST AND SECOND TRANSFORMERS AND SAID LOW VOLTAGE SOURCE, AND HAVING INPUT FEEDBACK MEANS INCLUDING THE PRIMARY WINDING OF SAID FIRST TRANSFORMER, TO THEREBY FORM AN ELECTRONIC OSCILLATOR CIRCUIT, CAPACITOR MEANS, A FLASH TUBE CONNECTED TO SAID CAPACITOR MEANS, RECTIFIER MEANS INTERCONNECTING SAID CAPACITOR MEANS AND THE SECONDARY WINDING OF SAID SECOND TRANSFORMER, VOLTAGE RESPONSIVE LIGHT GENERATING MEANS, MEANS CONNECTING LIGHT GENERATING MEANS, CAPACITOR MEANS TO ENERGIZE THE SAME UPON SAID CAPACITOR MEANS RECEIVING A GIVEN CHARGE, A PHOTOSENSITIVE RESISTOR HAVING A HIGHT DARK RESISTANCE AND A LOW LIGHT RESISTANCE, SAID PHTOTOSENSITIVE RESISTOR BEING POSITIONED TO RECEIVE LIGHT FROM SAID LIGHT GENERATING MEANS, AND MEANS CONNECTING SAID PHOTOSENITIVE RESISTOR TO THE SECONDARY WINDING OF SAID FIRST TRANSFORMER TO THEREBY CONTROL SAID OSCILLATOR CIRCUIT.