Proximity responsive system
First Claim
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1. A SYSTEM SENSITIVE TO THE PROXIMITY OF AN EXTRANEOUS OBJECT FOR CONTROLLING AN EXTERNAL DEVICE, COMPRISING AN ELECTRICAL CIRCUIT INCLUDING AN OSCILLATOR AND A TANK CIRCUIT FOR CONTROLLING THE FREQUENCY OF THE OSCILLATOR, A SHUNT ACROSS SAID TANK CIRCUIT, A PROBE IN SAID SHUNT FOR SENSING THE PROXIMITY OF THE EXTRANEOUS OBJECT, AND A RESISTOR IN SAID SHUNT CONNECTED BETWEEN SAID TANK CIRCUIT AND SAID PROBE, SAID PROBE CHANGING THE Q OF THE TANK CIRCUIT IN RESPONSE TO THE PROXIMITY OF THE EXTRANEOUS OBJECT TO PRODUCE A CHANGE IN AMPLITUDE IN THE OUTPUT OF SAID OSCILLATOR, AND CONTROL MEANS RESPONSIVE TO THE SAID CHANGE IN OUTPUT AMPLITUDE TO CONTROL THE EXTERNAL DEVICE.
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1 Claim
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1. A SYSTEM SENSITIVE TO THE PROXIMITY OF AN EXTRANEOUS OBJECT FOR CONTROLLING AN EXTERNAL DEVICE, COMPRISING AN ELECTRICAL CIRCUIT INCLUDING AN OSCILLATOR AND A TANK CIRCUIT FOR CONTROLLING THE FREQUENCY OF THE OSCILLATOR, A SHUNT ACROSS SAID TANK CIRCUIT, A PROBE IN SAID SHUNT FOR SENSING THE PROXIMITY OF THE EXTRANEOUS OBJECT, AND A RESISTOR IN SAID SHUNT CONNECTED BETWEEN SAID TANK CIRCUIT AND SAID PROBE, SAID PROBE CHANGING THE Q OF THE TANK CIRCUIT IN RESPONSE TO THE PROXIMITY OF THE EXTRANEOUS OBJECT TO PRODUCE A CHANGE IN AMPLITUDE IN THE OUTPUT OF SAID OSCILLATOR, AND CONTROL MEANS RESPONSIVE TO THE SAID CHANGE IN OUTPUT AMPLITUDE TO CONTROL THE EXTERNAL DEVICE.
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