Automatic apparatus for checking multiconductor electrical cables

Claim 1

ELECTRICAL CIRCUIT CHECKING APPARATUS COMPRISING ROTARY SWITCH MEANS INCLUDING A CONDUCTIVE RING, A PLURALITY OF CONTACT MEMBERS IN NORMALLY CLOSED CONTACT THEREWITH, A PAIR OF OPPOSITELY EXTENDING SELECTOR ARMS ROTATIVELY MOUNTED AS A UNIT AT THE CENTER OF SAID RING AND MOVABLE AGAINST SUCCESSIVE INDIVIDUAL DIAMETRICALLY OPPOSED CONTACT MEMBERS TO ISOLATE THEM FROM SAID RING, DRIVE MEANS FOR AUTOMATICALLY MOVING SAID ARMS STEPWISE TO SUCCESSIVE CONTACT MEMBERS AROUND SAID RING, MEANS FOR INTERCONNECTING SAID CONTACT MEMBERS WITH RESPECTIVE CONDUCTORS OF AN ELECTRICAL CABLE AT ONE END THEREOF, ELECTRICAL SENSING MEANS FOR SENSING A PRESELECTED RESISTANCE IN THE RESPECTIVE CONDUCTOR CONNECTED TO EACH SUCH ISOLATED CONTACT MEMBERS AND FOR PROVIDING ELECTRICAL SWITCHING ACTION UPON SENSING OF SUCH PRESELECTED RESISTANCE, AND SELECTOR SWITCH MEANS ELECTRICALLY INTERCONNECTING SAID ROTARY SWITCH MEANS AND SAID SENSING MEANS FOR SELECTIVELY INTERCONNECTING AT LEAST ONE OF SAID ARMS ELECTRICALLY WITH SAID SENSING MEANS AND FOR ESTABLISHING A PREDETERMINED ELECTROMECHANICAL UTILIZATION FOR SAID SWITCHING ACTION OF SAID SENSING MEANS, SAID SENSING MEANS ELECTRICALLY INTERCONNECTED WITH SAID DRIVE MEANS FOR STOPPING SAID DRIVE MEANS BY SAID SWITCHING ACTION, AND SWITCH MEANS FOR INTERCONNECTING ONE OF SAID ARMS WITH SAID RING, AND INDICATOR MEANS INCLUDED WITH SAID SENSING MEANS AND ENERGIZABLE BY SAID SWITCHING ACTION UPON SENSING OF SAID PRESELECTED RESISTANCE AND CALIBRATION MEANS INCLUDED IN SAID SENSING MEANS FOR ADJUSTING THE SENSITIVITY OF THE SENSING MEANS TO SAID RESISTANCE MEANS COUPLED WITH SAID SENSING MEANS FOR ADJUSTING ITS SENSITIVITY TO SAID RESISTANCES.