Multiple conductor cable tester having rotatable annular switch means for testing insulation resistance, cross wiring and continuity

• US 3,217,244 A
• Filed: 12/27/1961
• Issued: 11/09/1965
• Est. Priority Date: 12/27/1961
• Status: Expired due to Term

• Current Assignee: George G. Glover
• Original Assignee: George G. Glover
• Inventors: Glover, George G.
• Application Number:
  US04/162,618
• Time in Patent Office: 1,413 Days
• US Class Current: 324/540
• CPC Class Codes: G01R 31/58 Testing of lines, cables or conductors testing of electric windings G01R31/72

Claims

1. A DEVICE TO TEST FOR INSULATION RESISTANCE, CONTINUITY AND CROSS WIRING OF AN ELECTRICAL CABLE HAVING A PLURALITY OF CONDUCTORS, COMPRISING A ROTATABLE ANNULAR SWITCHING MEANS HAVING A PLURALITY OF CONTACTS EQUAL IN NUMBER AND ADAPTED TO BE ELECTRICALLY CONNECTED TO SAID CONDUCTORS AT ONE END OF SAID CABLE WHEN SAID CABLE IS UNDER TEST;

SAID ANNULAR SWITCHING MEANS HAVING ROTATING MEANS ADAPTED TO BE ROTATED WITH RESPECT TO SAID CONTACTS;

SAID ROTATING MEANS BEING SO CONSTRUCTED AS TO SELECTIVELY CONNECT ANY ONE OF SAID CONTACTS TO AN INDICATING ARM WHILE CONNECTING ALL OTHER CONTACTS TO A SHUNT ARM;

A FIRST AND SECOND CIRCUIT MEANS, EACH HAVING A POWER SOURCE, INPUT TERMINALS, AND AN INDICATING MEANS;

A DOUBLE POLE, DOUBLE THROW SWITCH HAVING A COMMON PAIR OF TERMINALS CONNECTED BETWEEN SAID INDICATING ARM AND SAID SHUNT ARM RESPECTIVELY AND HAVING FIRST AND SECOND PAIR OF TERMINALS SELECTIVELY ENGAGING SAID COMMON PAIR OF TERMINALS IN A FIRST AND A SECOND POSITION OF SAID SWITCH;

SAID FIRST PAIR OF TERMINALS BEING CONNECTED TO THE INPUT TERMINALS OF SAID FIRST CIRCUIT MEANS FOR CONNECTING SAID FIRST CIRCUIT MEANS TO SAID ANNULAR SWITCHING MEANS IN THE FIRST POSITION OF SAID SWITCH;

SAID SECOND PAIR OF TERMINALS BEING CONNECTED TO THE INPUT TERMINALS OF SAID SECOND CIRCUIT MEANS FOR CONNECTING SAID SECOND CIRCUIT MEANS TO SAID ANNULAR SWITCHING MEANS IN THE SECOND POSITION OF SAID SWITCH;

A TEST ADAPTER MEANS HAVING INDICATING MEANS;

SAID TEST ADAPTER BEING DISPOSED FOR CONNECTING SAID PLURALITY OF CONDUCTORS AT THE OTHER END OF SAID CABLE IN SHUNT;

SAID TEST ADAPTER MEANS CONNECTING SAID CONDUCTOR IN SHUNT WHEN SAID SWITCH IS IN THE SECOND POSITION;

SAID FIRST CIRCUIT MEANS PROVIDING AN INDICATION OF THE INSULATION RESISTANCE OF SAID CABLE WHEN SAID SWITCH IS IN THE FIRST POSITION;

AND SAID SECOND INDICATING MEANS OF SAID CIRCUIT MEANS AND SAID TEST ADAPTER MEANS PROVIDING AN INDICATION OF THE CONTINUITY AND CROSS WIRING OF SAID CABLE WHEN SAID SWITCH IS IN THE SECOND POSITION.