Malfunction indicator for semiconductor voltage regulators

Claim 1

IN COMBINATION, A GENERATOR HAVING A FIELD WINDING AND AN OUTPUT WINDING, A DIRECT CURRENT OUTPUT CIRCUIT ENERGIZED BY SAID OUTPUT WINDING, A TRANSISTOR VOLTAGE REGULATOR CIRCUIT HAVING A VOLTAGE SENSING CIRCUIT ARRANGEMENT AND AT LEAST ONE TRANSISTOR, FIRST MEANS FOR CONNECTING THE EMITTER AND COLLECTOR ELECTRODES OF SAID TRANSISTOR AND SAID FIELD WINDING IN SERIES ACROSS SAID DIRECT CURRENT OUTPUT CIRCUIT, SECOND MEANS FOR CONNECTING SAID VOLTAGE SENSING CIRCUIT ARRANGEMENT ACROSS SAID DIRECT CURRENT OUTPUT CIRCUIT, AN ELECTRICALLY ENERGIZABLE INDICATING LAMP, A FOUR LAYER DIODE HAVING A BREAKDOWN VOLTAGE RATING OF A SELECTED VALUE GREATER THAN THE DESIRED REGULATED VOLTAGE TO BE MAINTAINED BY SAID VOLTAGE REGULATOR CIRCUIT, AND MEANS FOR CONNECTING AT LEAST SAID ELECTRICALLY ENERGIZABLE INDICATING LAMP AND SAID FOUR LAYER DIODE IN SERIES ACROSS SAID DIRECT CURRENT OUTPUT CIRCUIT FOR PROVIDING A VISUAL INDICATION WHEN THE VOLTAGE ACROSS SAID DIRECT CURRENT OUTPUT CIRCUIT EXCEEDS THE VOLTAGE TO BE MAINTAINED BY SAID VOLTAGE REGULATOR CIRCUIT.