Contact-free rotary resistor arrangement

Claim 1

CONTACT-FREE ROTARY RESISTOR ARRANGEMENT COMPRISING A MAGNETIC CIRCUIT INCLUDING A PAIR OF MAGNETICALLY EXCITED STATIONARY POLE SHOES OF MAGNETIC MATERIAL DISPOSED IN OPPOSITE SPACED RELATIONSHIP AND DEFINING AN AIR GAP THEREBETWEEN, AT LEAST ONE SEMICONDUCTOR FIELD PLATE LOCATED ON ONE OF SAID POLE SHOES WITHIN SAID AIR GAP, A YOKE MOUNTED WITHIN SAID AIR GAP AND HAVING A ROTARY AXIS DISPOSED PERPENDICULARLY TO THE LINES OF FORCE OF SAID MAGNETIC CIRCUIT, SAID YOKE HAVING AT LEAST ONE END FACE LOCATED AT AN INCLINED ANGLE WITH RESPECT TO SAID AXIS, SAID POLE SHOES AND SAID YOKE HAVING PERIPHERAL SURFACES AT LEAST PARTLY OPPOSING ONE ANOTHER, SAID AIR GAP ADJACENT SAID FIELD PLATE BEING TRAVERSIBLE BY THE PERIPHERAL SURFACE OF SAID YOKE DURING EACH CYCLE OF ROTATION OF SAID YOKE ABOUT SAID AXIS SO AS TO PRODUCE A VARYING MAGNETIC FIELD IN SAID AIR GAP AND CONSEQUENTLY IN SAID FIELD PLATE,