Variable resistance bridge

Claim 1

A BRIDGE FOR A SINGLE-TURN VARIABLE RESISTANCE DEVICE INCLUDING A RESITANCE ELEMENT FORMED OF A LENGTH OF HELICALLY COILED RESISTANCE WIRE HAVING ITS AXIS DISPOSED IN A SUBSTANTIALLY CLOSED LOOP WITH THE ENDS OF SAID COILED WIRE IN CLOSELY SPACED JUXTAPOSITION, A MOVABLE ELECTRICAL WIPER MOUNTED TO TRAVERSE A CLOSED PATH AROUND SAID RESISTANCE ELEMENT THEREBY TO SUCCESSIVELY ENGAGE ADJACENT TURNS OF SAID RESISTANCE WIRE, ELECTRICALLY CONDUCTIVE MEMBERS CONNECTED TO SAID RESISTANCE WIRE AT ELECTRICAL CONTACT POINTS A PREDETERMINED DISTANCE FROM THE ENDS THEREOF, SAID BRIDGE COMPRISING A PLURALITY OF TURNS OF RESISTANCE WIRE BETWEEN EACH ELECTRICAL CONTACT AND THE RESPECTIVE END OF SAID RESISTANCE WIRE, AT LEAST ONE OF SAID TURNS BEING SEVERED IN A REGION OUT OF THE PATH OF THE ENGAGEMENT BETWEEN SAID RESISTANCE WIRE AND SAID WIPER, SAID SEVERED TURNS FORMING A NON-CONDUCTIVE COILED SECTION HAVING AN ARCUATE LENGTH GREATER THAN THE CONTACT LENGTH OF SAID WIPER.