Apparatus having a plurality of pairs of impedance elements for testing electrical wiring connections

Claim 1

APPARATUS FOR TESTING THE CONFORMITY OF CONNECTIONS BETWEEN TERMINALS OF A MULTITERMINAL TEST NETWORK WITH CONNECTIONS BETWEEN CORRESPONDING TERMINALS OF A MASTER NETWORK COMPRISING, A PLURALITY OF PAIRS OF IMPEDANCE ELEMENTS EACH PAIR BEING INTERCONNECTED, MEANS FOR CONNECTING ONE OF THE IMPEDANCE ELEMENTS OF EACH PAIR INDIVIDUALLY TO THE TERMINALS OF THE TEST NETWORK, MEANS FOR CONNECTING THE OTHER IMPEDANCE ELEMENT OF EACH PAIR INDIVIDUALLY TO THE CORRESPONDING TERMINALS OF THE MASTER NETWORK, FIRST MEANS FOR SUPPLYING A POTENTIAL OF ONE POLARITY TO A TERMINAL UNDER TEST OF THE TEST NETWORK FOR ENERGIZING A FIRST IMPEDANCE ELEMENT WHICH IS CONNECTED TO THAT TERMINAL, SECOND MEANS FOR SUPPLYING A POTENTIAL OF THE OPPOSITE POLARITY TO THE CORRESPONDING TERMINAL OF THE MASTER NETWORK FOR ENERGIZING A SECOND IMPEDANCE ELEMENT WHICH IS CONNECTED TO THAT TERMINAL, SAID FIRST AND SECOND POTENTIAL SUPPLYING MEANS BEING CONNECTED IN SERIES, AND MEANS RESPONSIVE TO THE ENERGIZATION OF A THIRD IMPEDANCE ELEMENT OF ANOTHER PAIR BY ONE OF SAID ENERGIZING POTENTIALS, CAUSED BY A CONNECTION FAULT OF THE TERMINAL UNDER TEST WHICH PLACES SAID THIRD IMPEDANCE ELEMENT IN CIRCUIT WITH SAID ONE OF SAID ENERGIZING POTENTIALS, FOR INDICATING NONCONFORMITY.