Abstract: A rotor for a D.C. electric motor is disclosed, in which the rotor has a frontally arranged collector on which brushes are active, which are oriented parallel to the rotor axis. This arrangement considerably reduces the diametrical bulk of the motor. The brush angle is adjustable by means of an annular ring, internally threaded to the yoke.

Abstract: A commutator motor brush mounting arrangement is arranged in an axial opening of an electric motor housing. The arrangement is provided with mounting bars which protrude axially from a support plate, the mounting bars being arranged at the interior of the motor housing. Hammer-shaped brush holders which are formed with half-open bearing shells are rotatably engaged with the mounting bars. Axial displacement of the brush holders in a first direction is prevented by the front plate, and in a second direction by an end plate. The end plate is provided with elastic openings for engaging posts arranged on the mounting bars in a self-locking manner. The support plate and the end plate are provided with respective complementary guide portions in the form of support ribs and corresponding depressions. Such guide portions rotatably secure the hammer-shaped brush holders to the mounting bars, so as to prevent canting and binding of the brush holders within the motor housing.

Abstract: A motor or generator of the direct current type includes a stator carrying permanent magnets that is rotatable between first and second operational positions. A rotor having a winding and cooperating with a commutator is rotatable in either direction. The orientation of the magnetic field with respect to the commutator, as determined by the position of the stator, establishes the direction of rotation. If the stator is off-center when the rotor winding is energized, the stator will move to one of its operational positions under the force of a reaction torque.

Abstract: The present invention provides an improved system for controlling the location of a ring of sliding electrical contacts relative to a rotor. A magnetic field is generated generally parallel to the axis of the rotor. An electrical conductor has a generally circular portion which is located proximate the ring of sliding electrical contacts and mechanically coupled thereto. An electric current is passed through the circular portion of the conductor to induce radial movement of the circular portion to thereby move the sliding contacts radially with respect to the rotor.

Abstract: A brush holding apparatus for a rotary electric machine permitting removal and replacement of brushes without stopping the rotation of the rotary electric machine comprises a brush holder which can be detached from a stationary unit, and a securing device for detachably securing the brush holder to the stationary unit. A manipulating lever is provided on the stationary unit to actuate the securing device. The brush holder can easily be mounted on or detached from the stationary unit by the manipulation of the manipulating lever for the puppose of removal and replacement of the brushes while the rotary electric machine is in operation.

Abstract: A motor brush for use in a miniature motor comprises a coil spring having both end portions extended to the outside, a contact member secured to the one end portion of the coil spring and biased to contact with a commutator by spring force, a stop member provided at a support member in a motor case for stopping the other end portion of the coil spring, and a column body secured to the support member for supporting the coil spring.

Abstract: A brush cage for an electric motor wherein the brush sets are mounted on two assemblies. One assembly is mounted to the frame and the second assembly is mounted to a removable frame end plate, which when removed, provides access to the first assembly and commutator. Each assembly includes an electrically conductive ring upon which the brushes are mounted. The brushes are electrically interconnected through the ring upon which they are mounted. The rings are in a spaced relation to each other along the commutator rotational axis and are on substantially parallel planes which are perpendicular to that axis. The brushes on one ring fit between the brushes on the other ring so as to be disposed around the commutator in an inter-leafed pattern within the space between the two rings.

Abstract: In order to facilitate the automated assembly of an electric motor, all of the major components and sub-assemblies thereof are successively brought together in one axial direction.

Abstract: A slip ring for the transfer of very large currents to the rotor of an electric power generator is provided with a slip contact surface in the form of a surface of revolution oblique to the axis of rotation that is a ruled surface, which is to say straight lines (known as generatrices) can be drawn on it, whether the surface be flat, as a conical surface, or curved as, for example, a hyperboloidal surface. Cooling grooves centered on straight lines are provided, as well as cooling channels beneath the surface and parallel to it, through which air passes and may thereafter be used to cool the brushes and their supports. The brushes are arranged on self-adjusting ring-shaped carriers hung on centering arms rolling on axially directed guides and urged by a spring arrangement so as to press the brushes towards the slip ring. When one ring of brushes is worn away, it is carried beyond the slip ring where it can be removed for renewal and new rings of brushes can be added, all without stopping the generator.

Abstract: A commutated electric motor, which motor is cooled by the fluid which it pumps. The motor has a molded end cover construction, the material being the bearing material, and providing for guiding of the brushes. Torsion springs are utilized as the sole biasing means and current carrying members for the brushes. Also, the fluid is pumped along a closed channel structure and directed against the brushes to increase endurance.

Abstract: A dynamoelectric machine having a rotatable commutator and a plurality of brushes mounted in brush holders is provided with a rigging assembly that operates to prevent the commutator from being forced into contact with the brush holders when the machine is subjected mechanical shocks. The brush holders are mounted on a yoke member that is resiliently biased to a predetermined spacing relative to the commutator. A limit stop on the yoke member is positioned to contact a spacer ring on the commutator when a mechanical shock forces the commutator toward the brush assemblies, thereby to prevent the commutator from contacting the brush assemblies.