Condition control galvanometer with photoelectric limit sensing

Claim 1

CONDITION RESPONSIVE AUTOMATIC CONTROL APPARATUS COMPRISING, IN COMBINATION, A TRANSDUCER CONNECTABLE TO BE RESPONSIVE TO VARIATIONS IN A SELECTED CONDITION, SAID TRANSDUCER INCLUDING AN INDICATOR MOUNTED FOR SWINGING MOVEMENT ABOUT A PIVOT AXIS IN RESPONSE TO VARIATIONS IN SAID SELECTED CONDITION AND INCLUDING A FIRST POINTER EXTENDING FROM SAID AXIS AND SWINGABLE IN AN ARCUATE PATH ALONG AN ARCUATE SCALE; AT LEAST ONE ARCUATELY EXTENDING MASK MOUNTED ON SAID INDICATOR AND SWINGABLE IN AN ARCUAATE PATH UPON SWINGING OF SAID INDICATOR; AT LEAST ONE ARM MOUNTED FOR ADJUSTMENT ABOUT AN AXIS COAXIAL WITH THE PIVOT AXIS OF SAID INDICATOR; EACH ARM INCLUDING AN ARM PORTION EXTENDING FROM SAID PIVOT AXIS AND HAVING A SECONE POINTER AT ITS FREE END COOPERABLE WITH SAID SCALE; AT LEAST ONE PHOTOSENSITIVE SWITCH ADJUSTABLY MOUNTED ON AT LEAST ONE OF SAID ARMS FOR ADJUSTMENT THEREON, AND POSITIONED WITHIN THE ARCUATE PATH OF MOVEMENT OF SAID MASK; SAID PHOTOSENSITIIVE SWITCH COMPRISING A PHOTOSENITIVE ELEMENT AND A LIGHT SOURCE HAVING A LIGHT EMITTING SURFACE IN ADJACENT FACING SPACED RELATION TO SAID PHOTOSENSITIVE ELEMENT, FOR MOVEMENT OF SAID MASK THEREBETWEEN; CONTROL SWITCHING MEANS RESPONSIVE TO SAID PHOTOSENSITIVE SWITCH FOR OPERATION THEREBY IN ACCORDANCE WITH THE RELATIVE POSITION OF SAID MASK RELATIVE TO THE ASSOCIATED PHOTOSENSITIVE SWITCH; AND ADJUSTING MEANS CONNECTED TO EACH OF SAID ARMS AND PROJECTING FORWARDLY FROM SAID SCALE FOR SELECTIVE ADJUSTMENT OF SAID SECOND POINTER OF EACH ARM RELATIVE TO SAID SCALE.