Contact and terminal assembly for a brush wear indicator

A brush wear indicator contact and terminal assembly, for use with a self-winding brush-follower spring having a coil portion that operates as a contactor to complete an electrical circuit with the assembly thereby to actuate a signal responsive to the occurrence of a predetermined degree of brush wear, comprising, a sheet of flexible dielectric material fastened to said spring adjacent the uncoiled end thereof, a generally flat, bendable contact plate having a ridge on a first surface thereof and having a groove on a second surface thereof, said groove being adapted to receive an electrical conductor therein, an electrical conductor having a predetermined part thereof mounted in said groove and in electrical conducting relationship to the contact plate, said contact plate being mounted in fixed relation to said sheet of dielectric material and to the uncoiled end of said spring, with the groove in the plate facing said sheet to position the ridge on the contact plate in the path of movement of the coil portion of the spring so that the ridge is engaged by the coil responsive to the spring winding up and moving the coil a predetermined distance toward the fixed end of the spring, thereby to electrically connect the spring to said electrical conductor, said sheet of dielectric material being effective to electrically isolate the contact plate from the spring responsive to said coil being disengaged from said ridge.