Miller

Claim 1

APPARATUS FOR CONTROLLING THE MAXIMUM TORQUE APPLIED BY A SERVO MECHANISM TO A CONTROL SURFACE OF AN AIRCRAFT AND MONITORING APPARATUS THEREFOR COMPRISING (1) A SOURCE OF POWER, (2) FIRST, SECOND AND THIRD RESISTORS, EACH HAVING ONE END CONNECTED TO SAID SOURCE OF POWER, SAID THIRD RESISTOR HAVING ITS OTHER END CONNECTED TO SAID SERVO MECHANISM, (3) FIRST AND SECOND AIRCRAFT CONDITION RESPONSIVE SWITCHES CONNECTED TO THE OTHER ENDS OF SAID FIRST AND SECOND RESISTORS RESPECTIVELY, SAID FIRST AND SECOND CONDITION RESPONSIVE SWITCHES HAVING FIRST AND SECOND OPERATING POSITIONS RESPECTIVELY, THE PARTICULAR POSITION DEPENDING UPON THE MAGNITUDE OF THE CONDITION EXPERIENCED BY SAID AIRCRAFT, (4) FIRST AND SECOND TEST SWITCHES CONNECTED TO SAID FIRST AND SECOND CONDITION RESPONSIVE SWITCHES RESPECTIVELY, EACH OF SAID FIRST AND SECOND TEST SWITCHES HAVING FIRST AND SECOND PAIRS OF OPERATING POSITIONS ADAPTED TO BE RESPONSIVE TO SAID FIRST AND SECOND OPERATING POSITIONS OF SAID FIRST AND SECOND CONDITION RESPONSIVE SWITCHES RESPECTIVELY, (5) FOURTH AND FIFTH RESISTORS, EACH HAVING ONE END CONNECTED TO RESPECTIVE FIRST AND SECOND TEST SWITCHES AND THE OTHER END CONNECTED TO A PREDETERMINED POTENTIAL, (6) AND MONITORING MEANS HAVING ONE END CONNECTED BETWEEN SAID FIRST TEST SWITCH AND SAID FOURTH RESISTOR AND ANOTHER END CONNECTED BETWEEN SAID SECOND TEST SWITCH AND SAID FIFTH RESISTOR WHEREBY AT ONE AIRCRAFT CONDITION THE FIRST, SECOND AND THIRD RESISTORS ARE CONNECTED IN PARALLEL TO FORM A LOW RESISTANCE NETWORK BETWEEN SAID SOURCE OF POWER AND SAID SERVO MECHANISM AND AT ANOTHER CONDITION ONLY THE THIRD RESISTOR IS CONNECTED BETWEEN SAID SOURCE OF POWER AND SAID SERVO MECHANISM TO FORM A HIGH RESISTANCE NETWORK THEREBETWEEN IN WHICH PORTIONS OF SAID CIRCUIT MAY BE SELECTIVELY MONITORED BY SAID MONITORING MEANS.