Abstract: A reverse-to-park windshield wiper crank arm assembly. The assembly includes a hub on the wiper motor shaft, a control member around and rotatable relative to the hub, an intermediate link having one end pivotally connected to a crank pin on the hub and including a slot which slidably receives a guide pin on the control member, a drive lug on the hub engageable on the side of the intermediate link and a coil torsion brake spring disposed in an annular space between the hub and a surrounding inner wall of the motor housing. When the hub rotates in one direction corresponding to normal windshield wiping, the intermediate link is captured in a folded position and rotates as a unit with the hub while a tang on the hub engages a first hook-like formation on one end of the brake spring and flexes the springs to flexed conditions.

Abstract: A dual snap-action electric switch is used in an electric motor antenna drive to stop antenna movement when predetermined force levels to longitudinal movement are encountered. The switch has two actuator arms operated by actuator tabs maintained in spaced relation by a primary spring. A secondary spring urges one actuator tab against the primary spring. The actuator tabs are movable longitudinally in response to longitudinal movement of an electric motor driven worm shaft to open one switch at a predetermined force level and the other switch at a higher predetermined force level, to stop the motor, such as when respective full extension or retraction of the antenna is reached.

Abstract: In a permanent magnet DC motor adapted for easy "drop-in" assembly within a generally cylindrical case having open and closed axial ends, a magnet retention member comprises a ring disposed within the case adjacent its closed end and provided with a plurality of resilient arms extending axially toward the open end, said arms grouped in pairs around the ring, each pair of arms disposed to receive an arcuate permanent magnet therebetween. The machine further includes an end cover adapted to close the open end of the case and provided with a plurality of fingers projecting axially between the pairs of resilient arms and being effective to bias the resilient arms to hold the arcuate magnets tightly against the inside of the case, the end cover further including a plurality of shoulders effective to cooperate with the ring to hold the arcuate magnets axially securely therebetween.

Abstract: A dynamoelectric machine includes a member rotatably receiving one end of the rotor and forming part of the case, the member having a plurality of brush boxes each having a first opening adjacent the commutator and a second opening through the outside of the case at a right angle to the first opening. Abrush is inserted into each brush box through the second opening and is biased toward the commutator to the first opening by a V-shaped spring inserted apex first through the second opening behind the brush, one leg of each V-shaped engaging the brush and the other end being attached to a terminal portion engaging the rotor receiving member to provide a base for the spring and an external electrical connection for the brush.