Abstract: A brush assembly structure for a motor has a brush holder integrally formed in substantially a C-shape so that free ends of leg portions of the brush holder are positioned at diametrically opposed side positions of a commutator. Brush accommodation units are formed at the free ends of the leg portions. Brush springs are attached to the cylindrical bottom portion of a holder stay unit. The brush springs elastically depress brushes accommodated in the brush accommodation units at the moment when the brushes reach the diametrical side positions of the commutator. When the brush unit is assembled to the holder stay unit in accordance with the invention, the brushes are protected during assembly and an assembly job is simplified.

Abstract: The apparatus for feeding an electrolyte fluid medium includes a housing and, mounted in the housing, an electric drive motor and a pump driven by it. The electric drive motor has a commutator device connectable electrically to a conductor supplying current to it. The commutator device includes a commutator attached to the armature spindle of the drive motor, at least two contacting brushes engaged with contacting surfaces of the commutator and prestressed spring devices for holding the brushes against the commutator. To meet the operating requirements and combat the erosion, the prestressed spring devices are leaf springs (42,44). One end (46) of each leaf spring is held fast against the housing and the other end (72) supports one of the contacting brushes (38,40). Each contacting brush (38,40) has a protruding portion (50) engaging in a throughgoing opening (52) of a leaf spring (42,44).

Abstract: The present invention offers a retaining structure of a brush spring of an electric motor, whereby a brush spring is allowed to be mounted in a normal direction only, thus avoiding abrasion of a brush or unexpected halt of the electric motor.

Abstract: An end frame of a small motor comprises an outer frame constructed of a yoke and the end frame which is fixed at an end of the yoke and has various directions and/or positions for extraction of terminals to be fixedly provided in the end frame, the end frame (1) of the small motor being characterized in that inserting holes (3.about.10) for forcedly fixing the terminals (2) serving as brush holders, (14a) are made previously in the end frame (20) in multiple positions and/or directions based on multiple usages of the small motor.

Abstract: A combined support and end cover for electric motors, and for small permanent magnet dc units in particular, which is molded in one piece from insulating plastic material and formed essentially as a flat disk of which the inner surface affords a central socket serving to support the corresponding end of the rotor shaft, a set of slotted holders for the brush contacts, and a number of posts projecting perpendicularly from the periphery of the disk between which the permanent magnet pole pieces are supported.

Abstract: In an electric motor having a commutator, when a brush wears the associated brushleaf carrying the brush may snag in gap between commutator segments of the commutator, the rotating commutator dragging a bushleaf around into electrical contact with the other brushleaf. To prevent electrical contact being made directly, or via a common commutator segment, a stop is integrally formed with a holder carrying the brushleaves to limit the movement of the brushleaf.

Abstract: A removable ganged, inside-out brushholder for a dynamoelectric machine slidably supports brushes on pairs of cylindrical brush pins which engage mating pairs of holes in respective brushes. A septum between an adjacent pair of brushes supports the ends of a pair of constant-force springs on opposite sides thereof. The constant-force springs include coiled portions which engage the upper ends of the adjacent brushes between the pairs of cylindrical brush pins thus urging the brushes into contact with the surface of a collector ring. All surfaces of brushes in the vicinity of the collector ring are open for air cooling in this critical region. In addition, at least one full surface of each brush is fully exposed for air cooling and a predetermined amount of free space is provided between adjacent brushes and between each brush and a back plate for permitting substantial air flow thereover.

Abstract: A brush assembly for an electrical machine has a holder having a pair of generally parallel side walls having confronting inner faces, a guide wall extending along and between the inner faces and in turn having an inner face defining with the faces of the side walls a passage extending in a longitudinal direction and having a longitudinally forwardly open front end, and an angled surface adjacent the front end. The brush in the passage has a longitudinal guide face longitudinally slidable on the inner face of the guide wall but out of contact with the side walls, an opposite longitudinal face turned away from the guide wall, and axially opposite front and rear ends. A coil spring has a coiled part engaged between the angled surface and the opposite brush face at the front end of the brush to transversely urge the brush against the inner face of the guide wall and a free end extending longitudinally back along the opposite face longitudinally past the rear end of the brush.

Abstract: A miniature D.C. motor for a toy allows the arrangement of a brush base in a housing of the motor to be readily and positively positioned to improve the manufacturing efficiency of the motor and to ensure the actuation of the motor without trouble for a long period of time.The motor includes a housing, a brush base which holds brushes therein and which detachably fits in the housing, and a detachable connection member for permitting a connection between the housing and the brush base. A motor further includes a commutator having an outer end formed into a truncated conical shape, wherein the brushes each are provided with a contact section having a convexly curved surface, to allow the outer end of the commutator to be pressedly interposed between the convexly curved surfaces of the brushes.

Abstract: A brush-holder for the disc commutator of rotating electric machines, in which axially-disposed brushes are maintained in abutment against the disc commutator by a spring constituted by two windings housed in a cavity located in the brush-holder opposite the brush guides. The two windings are separated by a median loop which engages elastically behind a retaining catch. The invention is particularly applicable to electric starters for internal combustion engines.

Abstract: A commutator motor specifically designed for incorporation into portable machine tools such as a hand drill includes a stator winding arranged in a machine housing, and a rotor winding including a rotor shaft with a commutator ring journalled in the housing. Electrical connection between the commutator and current supply is ensured by multiple pairs of diametrically opposed carbon brushes of opposite polarity, the brushes being supported in the machine housing such that each respective pair of brushes can be separately brought into contact with the commutator by a lever capable of engaging the respective pairs of brushes. Various holder configurations support the brushes.

Abstract: A brush holder for an electric motor having a commutator. The brush holder includes a simple flat plate (10) cut or stamped to provide slots (20) for sliding of the brushes (12) and openings (26) for holding the brush springs (14). The springs (14) normally engage the ends of the associated brushes (12) to bias them inwardly towards the motor commutator. When the brushes are retracted, the springs engage the sides of the brushes to lock the brushes in the slots.

Abstract: A brush holder for dynamo-electric machine has the following parts: a brush making sliding contact with the surface of a rotary collector; a stationary holder part fixed to the stationary part of the dynamo-electric machine opposite to the collector; and a detachable holder part detachably secured to the stationary holder part and holding the brush when separated from the stationary holder part, the detachable holder part being provided with a retainer that clamps the brush when the detachable holder part is separated from the stationary holder part and unclamps the brush when it is attached to the stationary holder part, the brush clamping portion and the portion of the retainer therearound being coated with a coating film of a material having a friction coefficient smaller than the material of the retainer. This arrangement obviates various unfavorable phenomena such as jumping of the brush, sparking on the sliding surface, cracking in the brush and so forth.

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 commutator brush holder mounts a pair of tension band springs in quadrature relation. Both springs contact the brush end remote from the commutator and urge the brush into contact with the commutator, with constant force. The quadrature springs promote full and intimate contact between the brush and commutator, thereby minimizing brush bounce and tilt and resultant transient signal generation.

Abstract: A brush holding device for an electric rotary machine for holding a brush electrically connecting the stationary part of the electric rotary machine to a rotating slip ring, the device comprising a brush box supported on the stationary part to accommodate the brush therein, a main wall detachably mounted on a main post extending from the brush box, a brush retaining element in the form of a band for retaining the brush in the brush box, a handle for carrying the main wall together with the brush, and a manipulating lever for unlockably locking the main wall to the brush box, whereby the brush can be easily and simply replaced.

Abstract: A brush device for a miniature electric motor of a type, wherein the commutator brush is inserted into a brush holding member made of a leaf spring which is generally bent in the form of a letter "L", one side of which is in a slightly bent form at about the middle portion thereof with a brush fitting portion being provided at the extreme end thereof, and the other side of which is rectilinear with a fitting portion to the main body of the motor being provided at the extreme end thereof.

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: To provide an inexpensive assembly of a brush-holder and brush to engage the slip rings of an automotive-type alternator, particularly for low-cost, high-quantity mass production, a brush carrier arm, for example of leaf spring or circular spring material, is directly connected to hold a brush at one end thereof, for example by clamping the brush, securing it in a socket, or carrying an insulated brush-holder plate to which the brushes themselves are attached, the brush-holder arm being secured to a base which may be integral with, or form the cover of a housing for an electronic voltage regulator, so that the brush-holder itself will provide the spring engagement force for reliable electrical contact while permitting functioning also as an electrical connection and permitting inexpensive manufacture.

Abstract: A brush device for a miniature electric motor of a construction, in which a brush comprising a brush main body and a brush head part having a smaller size than the brush main body is forcibly inserted into an opening of a substantially corresponding size shape to the brush head part which is perforated in one part of a brush holder made of a leaf spring in a strip of narrow breadth, and an electrically conductive adhesive agent is applied to a fitted portion of the brush head part and the perforated opening, depending on necessity, stages or shelves formed at the boundary of the brush head part and the brush main body due to difference in size therebetween serving as stopper means which stops further insertion of the brush upon full, forced insertion of the brush head part into and through the perforated opening.

Abstract: A brush device for a miniature electric motor constructed with a brush holder made of a leaf spring having a pair of flaps for holding a commutator brush, which are opposed each other along the longitudinal direction of a flat surface part, and which are formed in an inwardly bent shape, a guide member for insertion of the commutator brush formed at a corner of each of the pair of flaps, and a fitting member for the brush holder onto the main body of the motor; and a commutator brush having a head part to be inserted and held between said pair of flaps provided along the side edges of the flat surface part of the brush holder.

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.