Collector-ring assembly

Claim 1

A COLLECTOR-RING ASSEMBLY COMPRISING A PAIR OF ELEMENTS MOLDED OF INSULATING MATERIAL AND DISPOSED IN FACING RELATION, SAID ELEMENTS EACH HAVING A DISC-SHAPED PORTION AND AT LEAST ONE OF SAID ELEMENTS HAVING ALSO A CYLINDRICAL RIM EXTENDING TOWARD SAID OTHER ELEMENT, EACH OF SAID DISC PORTIONS HAVING AN INNER SURFACE AND AN OUTER SURFACE, THE INNER SURFACES BEING THOSE FACING ONE ANOTHER, EACH OF SAID DISC PORTIONS BEING ALSO PROVIDED WITH A CENTRAL APERTURE ADAPTED TO RECEIVE A ROTATABLE SHAFT, A PAIR OF ELECTRICALLY CONDUCTING RINGS FORMED OF STAMPED SHEET METAL AND SPACEDLY SECURED, AS BY RIVETING, TO THE INNER SURFACE OF ONE OF SAID DISC PORTIONS IN COAXIAL RELATION TO THE CENTRAL APERTURE THEREOF, A PLURALITY OF BRUSH-SUPPORTING MEANS SITUATED ON THE INNER SURFACE OF SAID OTHER DISC PORTION, A PAIR OF ELECTRICALLY CONDUCTING RESILIENT BRUSHES SECURED RESPECTIVELY TO SAID BRUSH-SUPPORTING MEANS AND POSITIONED TO BEAR RESPECTIVELY AGAINST DIFFERENT ONES OF SAID RINGS, SAID BRUSHES BEING INTEGRALLY FORMED OF RESILIENT SHEET METAL AND BEING ARCUATE IN SHAPE, MEANS ADAPTED TO SECURE ONE OF SAID ELEMENTS TO A SHAFT PASSING THROUGH THE CENTRAL APERTURE THEREOF, OPERATIVE TO CAUSE SAID ELEMENT TO ROTATE WITH SAID SHAFT, MEANS CARRIED BY SAID OTHER ELEMENT FOR ANCHORING THE SAME TO AN OBJECT SUCH AS THE FRAME OF AN ELECTRIC MOTOR, THEREBY HOLDING SAID ELEMENT STATIONARY, A FIRST PAIR OF WIRES RESPECTIVELY JOINED TO DIFFERENT ONES OF SAID RINGS AND PROJECTING EXTERNALLY OF SAID RING-CARRYING ELEMENT, AND A SECOND PAIR OF WIRES RESPECTIVELY CONNECTED TO DIFFERENT ONES OF SAID BRUSHES, SAID SECOND PAIR OF WIRES PROJECTING EXTERNALLY OF SAID BRUSH-CARRYING ELEMENT, THERE BEING ALSO FORMED INTEGRALLY ON THE INNER SURFACE OF SAID RING-CARRYING ELEMENT AN ANNULAR BOSS SEPARATING SAID RINGS AND EXTENDING BETWEEN SAID BRUSHES.