Coil testing device having a source of pulsed energy and commutator means synchronized with the energy source for providing a visual indication and comparison

Claim 1

A TEST DEVICE FOR TESTING A PLURALITY OF WINDINGS, COILS, OR THE LIKE HAVING A COMMON CONNECTION FOR SIMILARITY WITH RESPECT TO ONE ANOTHER COMPRISING, (A) A SOURCE OF PULSES ELECTRICAL ENERGY CONNECTED TO A CONTACT, (B) INDICATING MEANS HAVING A CONTACT FOR CONNECTION THERETO FORM A REPRESENTATION OF THE VOLTAGE WAVE FORM OF A SIGNAL CONNECTED TO THE CONTACT, (C) A SET OF AT LEAST THREE TERMINALS FOR CONNECTION TO EACH OF A PLURALITY OF COILS TO BE TESTED, (D) TIMING MEANS CONNECTING SAID CONTACTS TO A PAIR OF SAID SET OF TERMINALS FOR A PERIOD OF TIME SUFFICIENT TO ALLOW AT LEAST ONE PULSE OF ENERGY FROM SAID SOURCE OF PULSED ELECTRICAL ENERGY TO BE FORMED, SAID TIMING MEANS THEN CONNECTING SAID CONTACTS TO ANOTHER PAIR OF SAID SETS OF TERMINALS, AND SO ON, SAID TIMING MEANS CONSECUTIVELY CONNECTING DIFFERENT PAIRS OF CONTACTS OF SAID SET TO PROVIDE A REPRESENTATION OF SEVERAL VOLTAGE WAVE FORMS FOR COMPARISON OF SEVERAL DIFFERENT PAIRS OF COILS TO BE TESTED, AND (E) SAID SET OF TERMINALS AND SAID TIMING MEANS CONSTITUTING THE SOLE MEANS PROVIDING THE SEVERAL VOLTAGE WAVE FORMS TO SAID INDICATING MEANS.