Photoelectric light control system

Claim 1

A SYSTEM FOR CONTROLLING THE ENERGIZATION AND DEENERGIZATION OF A LAMP LOAD COMPRISING IN COMBINATION A PHOTOELECTRIC ELEMENT, A TRANSFORMER HAVING A PRIMARY WINDING AND TWO SECONDARY WINDINGS, A SOURCE OF ALTERNATING CURRENT, MEANS CONNECTING SAID PHOTOELECTRIC ELEMENT IN SERIES CIRCUIT RELATIONSHIP WITH SAID PRIMARY WINDING ACROSS SAID SOURCE, A LAMP LOAD, A SEMICONDUCTOR HAVING AN ANODE AND A CATHODE AND A GATE, MEANS CONNECTING SAID LOAD IN SERIES CIRCUIT RELATIONSHIP WITH SAID ANODE AND SAID CATHODE ACROSS SAID SOURCE, A SECOND SEMICONDUCTOR HAVING AN ANODE AND THE CATHODE AND A GATE MEANS CONNECTING THE ANODE AND THE CATHODE OF THE SECOND SEMICONDUCTOR IN REVERSED RELATIONSHIP ACROSS THE CATHODE AND THE ANODE OF THE FIRST SEMICONDUCTOR, A RECTIFIER, MEANS CONNECTING OF SAID SECONDARY WINDINGS AND SAID RECTIFIER IN SERIES CIRCUIT RELATIONSHIP ACROSS SAID SOURCE, MEANS CONNECTING SAID RECTIFIER TO THE GATE OF THE FIRST SEMICONDUCTOR TO APPLY A POSITIVE PULSE THERETO IN TIMED RELATION WITH THE POSITIVE PULSE APPLIED TO THE ANODE OPF THE FIRST SEMICONDUCTOR TO ENERGIZE SAID LOAD THROUGH A HALF CYCLE OF SAID SOURCE, A SECOND RECTIFIER, MEANS CONNECTING THE OTHER OF SAID SECONDARY WINDINGS TO SAID SECOND RECTIFIER IN SERIES CIRCUIT RELATIONSHIP ACROSS SAID SOURCE, MEANS CONNECTING SAID SECOND RECTIFIER TO THE GATE OF THE SECOND SEMICONDUCTOR TO APPLY A POSITIVE PULSE THERETO IN TIMED RELATION WITH A POSITIVE PULSE APPLIED TO THE ANODE OF THE SECOND SEMICONDUCTOR TO ENEERGIZE THE LOAD THROUGH THE NEXT HALF CYCLE OF SAID SOURCE WHEREBY THE LOAD REMAINS ENERGIZED UNTIL THE RESISTANCE OF SAID PHOTOELECTRIC ELEMENT BECAUSE OF NATURAL LIGHT FALLING THEREON DECREASES TO A VALUE THAT THE CURRENT THROUGH SAID PRIMARY WINDING INDUCES VOLTAGES IN SAID SECONDARY WINDINGS FOR NEUTRALIZING THE PULSES APPLIED TO SAISD GATE TO BLOCK THE FLOW OF CURRENT OF SAID LOAD.

Claim 2

A SYSTEM FOR CONTROLLING THE ENERGIZATION AND DEENERGIZATION OF A LAMP LOAD COMPRISING IN COMBINATION A PHOTOELECTRIC ELEMENT, A TRANSFORMER HAVING A PRIMARY WINDING AND TWO SECONDARY WINDINGS, A SOURCE OF ALTERNATING CURRENT, MEANS CONNECTING SAID PHOTOELECTRIC ELEMENT IN SERIES CIRCUIT RELATIONSHIP WITH SAID PRIMARY WINDING ACROSS SAID SOURCE, A LAMP LOAD, A SEMICONDUCTOR HAVING AN ANODE AND A CATHODE AND A GATE, MEANS CONNECTING SAID LOAD IN SERIES CIRCUIT RELATIONSHIP WITH SAID ANODE AND SAID CATHODE ACROSS SAID SOURCE, A SECOND SEMICONDUCTOR HAVING AN ANODE AND THE CATHODE AND A GATE MEANS CONNECTING THE ANODE AND THE CATHODE OF THE SECOND SEMICONDUCTOR IN REVERSED RELATIONSHIP ACROSS THE CATHODE AND THE ANODE OF THE FIRST SEMICONDUCTOR, A RECTIFIER, MEANS CONNECTING OF SAID SECONDARY WINDINGS AND SAID RECTIFIER IN SERIES CIRCUIT RELATIONSHIP ACROSS SAID SOURCE, MEANS CONNECTING SAID RECTIFIER TO THE GATE OF THE FIRST SEMICONDUCTOR TO APPLY A POSITIVE PULSE THERETO IN TIMED RELATION WITH THE POSITIVE PULSE APPLIED TO THE ANODE OPF THE FIRST SEMICONDUCTOR TO ENERGIZE SAID LOAD THROUGH A HALF CYCLE OF SAID SOURCE, A SECOND RECTIFIER, MEANS CONNECTING THE OTHER OF SAID SECONDARY WINDINGS TO SAID SECOND RECTIFIER IN SERIES CIRCUIT RELATIONSHIP ACROSS SAID SOURCE, MEANS CONNECTING SAID SECOND RECTIFIER TO THE GATE OF THE SECOND SEMICONDUCTOR TO APPLY A POSITIVE PULSE THERETO IN TIMED RELATION WITH A POSITIVE PULSE APPLIED TO THE ANODE OF THE SECOND SEMICONDUCTOR TO ENEERGIZE THE LOAD THROUGH THE NEXT HALF CYCLE OF SAID SOURCE WHEREBY THE LOAD REMAINS ENERGIZED UNTIL THE RESISTANCE OF SAID PHOTOELECTRIC ELEMENT BECAUSE OF NATURAL LIGHT FALLING THEREON DECREASES TO A VALUE THAT THE CURRENT THROUGH SAID PRIMARY WINDING INDUCES VOLTAGES IN SAID SECONDARY WINDINGS FOR NEUTRALIZING THE PULSES APPLIED TO SAISD GATE TO BLOCK THE FLOW OF CURRENT OF SAID LOAD.