Marginal checking system employing switch means for selective and simultaneous introduction of auxiliary parallel loads

Claim 1

A MARGINAL CHECKING SYSTEM FOR A GROUP OF ELECTRONIC CIRCUITS EACH OF WHICH INCLUDES AN OUTPUT CONDUCTOR, AN OUTPUT TERMINAL CONNECTED TO SAID OUTPUT CONDUCTOR, A BIAS POTENTIAL, AND A LOAD IMPEDANCE CONNECTED BETWEEN SAID OUTPUT TERMINAL AND SAID BIAS POTENTIAL, WHEREBY A CURRENT FLOW IN ANY OF SAID OUTPUT CONDUCTORS HAS A FIXED DIRECTION WITH RESPECT TO ITS ASSOCIATED SAID OUTPUT TERMINAL, SAID SYSTEM SIMULTANEOUSLY PROVIDING A CHANGE OF LOAD FOR EACH SAID ELECTRONIC CIRCUIT, AND COMPRISING: A SINGLE CONDUCTOR, AUXILIARY LOAD CIRCUITS EACH CONNECTED ONE BETWEEN SAID SINGLE CONDUCTOR AND A RESPECTIVE ONE OF SAID OUTPUT TERMINALS, EACH SAID AUXILIARY LOAD CIRCUIT BEING COMPRISED OF AN AUXILIARY IMPEDANCE CONNECTED IN SERIES WITH A SUBSTANTIALLY UNIDIRECTIONAL CURRENT CONDUCTING DEVICE POLED TO ALLOW CURRENT TO FLOW THERETHROUGH IN A DIRECTION, WITH RESPECT TO ITS ASSOCIATED SAID OUTPUT TERMINAL, WHICH IS OPPOSITE TO SAID FIXED DIRECTION, A FIRST POTENTIAL, A COMMON IMPEDANCE CONNECTED BETWEEN SAID SINGLE CONDUCTOR AND SAID FIRST POTENTIAL, A SECOND POTENTIAL, AND SWITCH MEANS HAVING FIRST AND SECOND STATES FOR SELECTIVELY DISCONNECTING AND CONNECTING SAID SINGLE CONDUCTOR WITH SAID SECOND POTENTIAL WHEN IN ITS FIRST OR SECOND STATES, RESPECTIVELY WHERE THE MAGNITUDE AND POLARITY OF SAID FIRST POTENTIAL IS SUCH WITH RESPECT TO EACH SAID BIAS POTENTIAL SO AS TO REVERSE BIAS ALL OF SAID DEVICES WHEN SAID SWITCH MEANS IS IN ITS FIRST STATE, AND THE MAGNITUDE AND POLARITY OF SAID SECOND POTENTIAL IS SUCH WITH RESPECT TO SAID FIRST POTENTIAL AND EACH SAID BIAS POTENTIAL SO AS TO FORWARD BIAS ALL OF SAID DEVICES WHEN SAID SWITCH MEANS IS IN ITS SECOND STATE.