Electrical interlock circuit

• US 3,160,793 A
• Filed: 05/24/1962
• Issued: 12/08/1964
• Est. Priority Date: 05/24/1962
• Status: Expired due to Term

• Current Assignee: Lionville Systems, Inc. (Emerson Electric Company)
• Original Assignee: Richard E. Wiley, Walter E. Colbarn
• Inventors: Colbarn, Walter E., Wiley, Richard E.
• Application Number:
  US04/197,488
• Time in Patent Office: 929 Days
• US Class Current: 361/192
• CPC Class Codes: H01H 47/001 Functional circuits, e.g. logic, sequencing, interlocking circuits

Claims

1. ELECTRICAL CIRCUIT MEANS FOR SELECTIVELY EFFECTING OPERATION OF ONLY ONE OF A PLURALITY OF DEVICES, COMPRISING:

(A) FIRST AND SECOND COMPONENT CIRCUITS EACH CONNECTIBLE TO A SOURCE OF VOLTAGE;

(B) SAID SECOND CIRCUIT HAVING A PLURALITY OF ELECTRICALLY RESPONSIVE MEANS, EACH FOR ACTUATING ONLY ONE OF SAID DEVICES WHEN ENERGIZED;

(C) SAID FIRST AND SECOND CIRCUITS HAVING SERIES CONNECTED FIRST AND SECOND SWITCH MEANS IN COMMON AND IN NORMALLY CLOSED CONDITION IN SAID FIRST CIRCUIT AND NORMALLY OPEN CONDITION IN SAID SECOND CIRCUIT;

(D) SAID FIRST SWITCH MEANS COMPRISING A PLURALITY OF SWITCHES EACH OPERABLE TO CONNECT ONLY ONE OF SAID ELECTRICALLY RESPONSIVE MEANS IN SAID SECOND CIRCUIT;

(E) ELECTRICALLY OPERATIVE MEANS FOR ACTUATING SAID SECOND SWITCH MEANS FROM ITS NORMALLY CLOSED CONDITION IN SAID FIRST CIRCUIT TO CLOSE ITS NORMALLY OPEN CONDITION IN SAID SECOND CIRCUIT THUS COOPERATING WITH SAID FIRST SWITCH MEANS TO CONNECT SAID SECOND CIRCUIT TO ITS VOLTAGE SOURCE TO ENERGIZE THE SELECTED ONE OF SAID ELECTRICALLY RESPONSIVE MEANS THUS TO EFFECT OPERATION OF THE DEVICE SELECTED BY SAID FIRST SWITCH MEANS;

(F) AND MEANS IN SAID FIRST CIRCUIT RENDERING SAID ELECTRICALLY OPERATIVE MEANS INOPERATIVE WHILE SAID FIRST AND SECOND SWITCH MEANS ARE CONNECTED IN SERIES CIRCUIT IN SAID FIRST CIRCUIT BUT TO RENDER IT OPERATIVE UPON THE CLOSURE OF ONE OF SAID PLURALITY OF SWITCHES IN SAID SECOND CIRCUIT.