Light controlled signal system

Claim 1

A LAMP SYSTEM FOR USE WHERE A LAMP MUST BE FLASHED INTERMITTENTLY UNDER CONDITIONS OF DARKNESS AND CUT OFF UNDER CONDITIONS OF DAYLIGHT, SAID SYSTEM COMPRISING A PHOTO-ELECTRIC CELL HAVING A CATHODE AND A ANODE AND ADAPTED TO GENERRATE A POTENTIAL UNEDER THE IMFLUENCE OF LIGHT, A FIRST TRANSISTOR OF THE PNP TYPE HAVING A BASE, COLLECTOR AND EMITTER ELECTRODE RESPECTIVELY, MEANS FOR CONNECTING THE CATHODE TO SAID BASE, MEANS FOR CONNECTING THE ANODE TO SAID EMITTER, A SECOND TRANSISTOR OF THE NPN TYPE, A DIRECT CONNECTION BETWEEN THE EMITTER OF THE FIRST TRANSISTOR AND THE BASE OF THE SECOND TRANSISTOR, A DIRECT CONNECTION BETWEEN THE COLLECTOR OF THE FIRST TRANSISTOR AND THE EMITTER OF THE SECOND TRANSISTOR, A FIRST RESISTOR DISPOSED BETWEEN THE BASE OF SAID SECOND TRANSISTOR AND THE EMITTER OF A THIRD PNP TRANSISTOR, A SECOND RESISTOR DISPOSED BETWEEN THE COLLECTOR OF THE SECOND TRANSISTOR AND THE BASE OF THE THIRD TRANSISTOR, A THIRD RESISTOR CONNECTED ACROSS THE BASE AND EMITTER OF THE THIRD TRANSISTOR, AN INCANDESCENT LAMP CONNECTED BETWEEN THE COLLECTOR OF THE THIRD TRANSISTOR AND THE EMITTER OF THE SECOND TRANSISTOR, AND A CIRCUIT BETWEEN THE BASE OF THE SECOND TRANSISTOR AND THE COLLECTOR OF THE THIRD TRANSISTOR, SAID LAST NAMED CIRCUIT INCLUDING A FOURTH RESISTOR, SAID SYSTEM BEING ADAPTED TO HAVE A BATTERY WHOSE POSITIVE TERMINAL IS CONNECTED TO THE EMITTER OF THE THIRD TRANSISTOR AND WHOSE NEGATIVE TERMINAL IS CONNECTED TO THE EMITTER OF THE SECOND TRANSISTOR, THE VALUE OF SAID FIRST RESISTOR BEING GREATER THAN THE SECOND RESISTOR, SAID SECOND AND THIRD RESISTORS HAVING GENERALLY VALUES OF THE SAME ORDER, SAID FOURTH RESISTOR HAVING A VALUE WHICH IS BETWEEN THAT OF THE FIRST RESISTOR AND THE VALUES OF THE SECOND AND THIRD RESISTORS, SAID SYSTEM BEING ADAPTED TO SWITCH SAID LIGHT ON OR OFF QUICKLY AS THE RESULT OF ACTION ON THE PHOTO-CELL THE SECOND AND THIRD TRANSISTORS COOPERATING WITH EACH OTHER TO EFFECT A QUICK CHANGE IN THE CONDUCTIVE OR NONCONDUCTIVE CONDITIONS, BOTH OF SAID TRANSISTORS BEING SUBSTANTIALLY CONDUCTIVE OR NON-CONDUCTIVE SIMULTANEOUSLY.