Electronic device for the control of relays and similar apparatus

Claim 1

AN ELECTRONIC RELAY CONTROL DEVICE COMPRISING A DIRECT-CURRENT AMPLIFIER INCLUDING A TRANSISTOR IN COMMONEMITTER CONNECTION, FIRST AND SECOND DIRECT-CURRENT SUPPLY TERMINALS FOR BIASING SAID TRANSISTOR, INPUT CIRCUIT MEANS INCLUDING FIRST AND SECOND INPUT TERMINALS FOR APPLYING A CONTROL VOLTAGE TO THE BASE-EMITTER CIRCUIT OF SAID TRANSISTOR, AN ELECTROMAGNETIC RELAY HAVING AT LEAST ONE WINDING AND PROVIDED WITH A CONTACT CONNECTED WITH A PAIR OF OUTPUT TERMINALS FOR OPERATING AN EXTERNAL UTILIZATION CIRCUIT, CONNECTION MEANS BETWEEN SAID FIRST INPUT TERMINAL AND THE BASE ELECTRODE OF SAID TRANSISTOR, A FIRST RESISTOR CONNECTING SAID BASE ELECTRODE WITH A COMMON POINT ITSELF CONNECTED WITH SAID SECOND INPUT TERMINAL AND WITH SAID SECOND DIRECT-CURRENT SUPPLY TERMINAL, A SECOND RESISTOR CONNECTING THE EMITTER OF SAID TRANSISTOR WITH SAID COMMON POINT, A SERIES CIRCUIT INCLUDING SAID WINDING AND A THIRD RESISTOR IN SERIES CONNECTION AND LINKING SAID FIRST DIRECT-CURRENT SUPPLY TERMINAL TO THE COLLECTOR OF SAID TRANSISTOR, AND FIRST AND SECOND FOUR-LAYER SEMICONDUCTOR DIODES RESPECTIVELY CONNECTED ACROSS SAID THIRD RESISTOR AND BETWEEN SAID COLLECTOR AND COMMON POINT.