Abstract: An electrical drive unit for windshield wipers of a motor vehicle, including a drive motor which has an armature accommodated in a substantially cup-shaped housing, and a substantially cup-shaped gearbox for receiving gear elements which is secured on a face end to the housing and is closable by a gearbox cover. A closable opening is provided in the gearbox or housing, through which opening a brush holder support that holds commutator brushes can be pushed in a radial direction onto the commutator of the drive motor.

Abstract: A structure for mounting a brush on an electric motor, including a mounting bracket having an opening at one end for allowing the brush to slide out of the mounting bracket and abut a moving conductor, a slot formed in a side wall of the mounting bracket for passing a pigtail wire, a tab portion in the side wall extending across the slot near the opening of the mounting bracket, and wherein the tab portion forms a space between the side wall and the brush for accommodating the wire as the brush slides out of the mounting bracket.

Abstract: A brush block assembly, for providing stationary mounting of electrically conductive brushes in contact registration with associated slip rings of a rotating interface, comprises a main housing adapted for mounting in proximity to the rotating interface and having a recess portion for releasably engaging a brush holder, and a brush holder formed from a thermoplastic molding compound comprising an organic polytetrafluoroethylene (PTFE) filler distributed within a polyetheretherketone (PEEK) thermoplastic resin, for securing the brushes within the recess in contact registration with their associated slip rings.

Abstract: A brush system for an electric motor is adapted to electrically connect a commutator with at least one field terminal of the motor. The system is provided in a housing of the motor and is accessible via an opening in the housing. In this system, at least one electrically conductive brush is held in contact with the commutator by an electrically conductive brush box, which has an electrically conductive connecting tab depending therefrom. The connecting tab is adapted to be connected to the field terminal. Also included is a frame which is configured and adapted to fixedly receive the brush box. A through hole is provided on the frame for allowing the connector tab to extend through the frame and connect to the field terminal. Further, an access door is configured and adapted to be latched to the opening in the housing by a latch device attached to the access door.

Abstract: The invention is based on an electrically operated motor, having a shaft with a magnet rotor body, the RPM of the shaft can be picked up by a Hall sensor disposed on a circuit board. The circuit board is embodied with soldered pins or contact shoes and is integrated into a component of the motor, and that contacts, supply and signal lines for the circuit board are injected and/or plugged into the component of the motor.

Abstract: A power tool has a mechanism to reverse a motor. The mechanism includes a first member secured with the motor surrounding the motor commutator. A pair of electrical contacts are supported in the first member. A second member is rotatable on the fist member. The second member carries a pair of brush holders which include electrical contacts. As the second member is rotated in the first member, the electrical contacts of the brush holders, as well as the electrical contacts in the first member, electrically couple with one another from a first position to a second position which relates to a forward and reverse direction of the motor. A lever moves the second member between its first and second positions.

Abstract: The invention relates to an electric motor having a preferably cup-shaped motor housing and a contacting device for supplying electrical energy from outside to corresponding motor parts. The contacting device includes a busbar, which is disposed in the interior of the housing and can be shifted at least partially through an opening in a housing wall, and the outer end of the busbar is electrically connectable to a connection line and the inner end of the busbar is electrically connectable to corresponding motor parts.

Abstract: In order to reduce the wear on the brushes (6) and thus extend the operating lives of the brushes and of the commutator motor, brush sparking on the trailing edges (6.2) of the brushes (6) is reduced a commutation magnetic field (M), produced for example by an additional magnet (4) placed axially behind the brushes (6), such that the magnetic field (M) deflects the moving charge carriers in the brushes (6), to thereby reduce the current density at the trailing edges (6.2) of the brushes (6).

Abstract: An electric noise suppressor for a direct current motor comprises a grommet, a choke coil and an electrical terminal. The grommet has an accommodating portion for accommodating the choke coil, an engaging portion for being engaged with a brush holding board of the motor, and a holding portion for holding the terminal. A pair of supporting portions for supporting a pigtail connector are formed to symmetrically protrude from an upper peripheral portion of the accommodating portion. Therefore, the terminal and the pigtail connector are disposed outside the accommodating portion of the grommet, thereby enabling inductance of the choke coil to increase. Further, the pigtail connector, the choke coil and the terminal are restricted from moving and chattering. As a result, the electrical noise suppressor requires less mounting space and is highly reliable.

Abstract: A dust guard for a universal motor has a body with an aperture for press-fit mounting to a brush holder. A hood extends from the body to give the dust guard a cup-like shape. The edge of the hood is shaped to follow a commutator surface. The hood has a passageway in each lateral side for drawing dust laden air into the flow of cooling air for the motor. Air guides formed on the outside of the dust guard adjacent the exits of the passageways assist in drawing out the dust laden air from the interior of the hood. Oil reservoirs form dust collection sites within the dust guard. The oil reservoirs include recesses filled with closely spaced projections to retain oil in the recesses by capillary action.

Abstract: A device for supporting and electrically contacting brushes, with which an electrical loop contact can be established with slip-rings on a shaft of a current generator or an electric motor. The device includes a support having a support base and a plurality of pins fastened thereto, through which at least one brush can be connected supportively with the support base. The device has at least one current distributor which can be electrically contacted in a short-circuiting manner with at least two brushes and can be connected to at least one electrical connection line. More than one of the pins function as an electrical contact pin with a contact surface and are integral components of at least one current distributor, so that at least one brush can be connected supportively through it and electrically contacted. The supporting base is electrically insulated at least in regions of connecting locations to the contact pins.

Abstract: An end cap assembly is configured as an electronic conducted noise filter and/or radiated field shield for incorporation as the end cap of a motor housing case as original equipment. The assembly includes a conductive panel having conductive members which interconnect discrete electrical components of a filter network array. Alternatively, various types of printed circuit boards, wireframe assemblies, wirewrap assemblies, and lead frame assemblies may be used. These assemblies include the conductive members which are held in position within an electrically insulative component member or housing of the end cap assembly by such means as insertion of tabs into captivating slots, insert overmolding, encapsulation, heat staking, mechanical., fasteners, and/or adhesives.

Abstract: The present invention discloses a combination of an electric motor and a pump with a compact design. It is important that the pump housing 9 is made of plastic material and slid into the housing periphery 2 of the electric motor so that it embraces the pump housing from the outside and thereby imparts stability to it.The pump bores 15, 16 extend radially outwardly and are closed by plugs 22, 23 which bear against the inside of the electric motor housing 2.Because the pump housing is made of plastic material, it can additionally be used as a brush support plate for the brushes 24, 25 of the electric motor.

Abstract: The brush block housing for providing stationary mounting of graphite composition brushes in contact registration with the rotating interface slip rings of an aircraft propeller deicing system, is formed from a thermoplastic molding compound comprising an organic polytetrafluoroethylene (PTFE) filler distributed within a polyetheretherketone (PEEK) thermoplastic resin, thereby minimizing non-functional abrasion of the brushes.

Abstract: In a starter having a motor yoke, a housing and an end frame forming a cylindrical starter frame, a cylindrical thermal insulation cover is fitted around the starter frame through rubber-made elastic rings. The rings are tightly fitted in V-shaped grooves formed circumferentially on fitting faces, one being between the housing and the yoke and the other being between the yoke and the end frame. Each ring is pressed radially inward by a large diameter part of the thermal insulation cover to fill in the V-shaped groove and contact the fitting face. Further, in a motor for the starter, a resilient plate sheet is disposed between a commutator and a brush holder to return a brush passing therethrough to the original position when the brush tends to move during sliding contact with the commutator.

Abstract: A cooling fin is fixed to a frame and mounts a plurality of rectifying elements. The cooling fin is configured into a circular ring shape separated at a cutout section. A brush holder, a connector casing and an IC regulator are disposed in this cutout section. A circumferential gap of the cutout section is smaller than three times a circumferential width of the brush container.

Abstract: An electric motor with a sensor, in particular an rpm sensor, is proposed. The sensor contains at least one means (20), generating a magnetic field, as the signal emitter, at least one magnetic field sensor (28, 30) as the signal receiver, and signal conducting means (22, 24, 26). The signal conducting means (22, 24, 26) contain magnetically conducting material and conduct the signal of the at least one magnetic field-generating means (20) to the at least one magnetic field sensor (28, 30). At least one current conducting means (40, 42, 44) is arranged essentially along the signal conducting means (22, 24, 26).

Abstract: In a brush holder device, in which an action-side end portion 22a of a torsion spring 22 is engaged with a torsion spring engaging groove 25 recessedly provided in an end surface of the brush 24 on the side opposite to a commutator 23, so that the elastic force of the torsion spring presses the brush against the commutator 23, a first inclined surface 26 is formed in the end surface of the brush 24 so as to incline at an angle of 15.degree. relative to a plane perpendicular to the axis of the brush, and second inclined surface 27 is formed in the engaging groove 25, being superposed on the first inclined surface 26. Further, a pigtail 28 is connected to the brush at an offset point relative to the engaging groove 25. Because of the second inclined surface, the torsion spring can suppress so-called "wild behavior" of the brush, and thereby, can prevent brush sound. The angle of inclination of the first inclined surface can be set at a small value, the brush can be molded using a molding die.

Abstract: A brush holder assembly for mounting on an electric machine casing. The brush holder assembly includes a brush, a brush guide that supports and guides the brush for travel, a spring for biasing the brush in a direction toward a commutator, and an electric insulator mounting for mounting the brush guide on a casing. The electric insulator mounting has electric insulator elements containing grooves engaging the side edges of the brush guide to support the brush guide and the brush in spaced relation to a casing when the brush holder assembly is mounted thereon. The brush guide has at least one wiring tab. Several forms for attaching the insulator elements to the casing are disclosed including threaded fasteners; integral grommet formations of the insulator elements; and the insulator elements being integral formations of the casing.

Abstract: A carbon brush for an electric machine, resiliently acting on a collector, is arranged within a guideway so as to be movable radially to the collector and is inflexibly connected with a bending leg. The carbon brush allows easy and cost-saving assembly in a motor and electric contacting. The bending leg serves the resilient advance of the carbon brush towards the collector, on the one hand, and the electric power supply, on the other hand.

Abstract: A DC motor has a projection which projects from the bottom surface of the brush-holder plate. The projection extends to outside in the axial direction of the motor. A terminal conductor is inserted into a perforated hole formed in the projection. One end of the terminal conductor is exposed to the outside of the motor from the tip of the projection, while another end of the terminal conductor is connected electrically to the brush. The projection functions as the built in type electrical connector to the motor, which when coupled to a power supply, powers the DC motor.

Abstract: The invention relates to a brush holding device used in a motor, and a method of assembling a brush holding frame onto a base plate in the brush holding device. In the brush holding device, flanged portions are protruded from both sides of a lower portion of a brush holding frame, and a pair of fixing portions each having a recessed portion substantially identical in shape to a cross-sectional shape of a corresponding one of said flanged portions are provided. The brush holding frame is inserted between the fixing portions while being slid on and along a base plate surface until the flanged portion on both sides of the brush holding frame are respectively fitted to the recessed portions of the fixing portions. Cover portions are provided on the brush holding frame at a level lower than the guide hole so as to cover the fixing portions when the fixing portions and flanged portions are fitted together.

Abstract: An electric rotating machine has an armature coil comprising outer and inner coil trunks disposed in slots of an armature core as well as outer and inner coil arms disposed along an axial side surface of the armature core. The outer coil arms are arranged to operate as a commutator and in slidable contact with brushes. The diameters of the radially outermost parts of the outer coil arms and the brushes are larger than that of the radially outermost surface of the outer conductor. This arrangement assures a larger commutator-brush contact area that reduces current density as well as heat generation in the commutator-brush contact area. As the radially outwardly extending parts of the outer coil arms are exposed to the surrounding air, the outer coil trunk, the outer coil arm and the brushes as well as the radially outwardly extending part are cooled effectively during rotation of the armature core.

Abstract: An electrical motor for a submersible well pump assembly has a brush for preventing arcing across the bearings. The motor has a housing and a stator stationarily mounted in the housing. A shaft extends through a cavity in the stator, the shaft carrying a rotor. Bearings are located at the base and head of the pump for stabilizing the shaft in the housing. A brush is stationarily carried by the housing in electrical common with the stator in the housing. The brush is also in sliding engagement with the shaft. The brush is located near one of the ends of the housing to reduce arcing across the bearing because of voltage differential between the shaft and the stator.

Abstract: A combined commutator brush retainer clip and electrical connector includes a main body portion and a terminal portion. The main body portion has a recessed portion with a plurality of dimples therein. A commutator brush is electrically connected to a brush holder sleeve, and the brush holder sleeve is, in turn, clampingly engaged to the commutator housing with the retainer. The brush holder sleeve is disposed within the recessed portion of the retaining clip and is frictionally engaged by the dimples. The terminal portion of the retainer engages a corresponding terminal member on the motor stator such that an electrical connection is established between said commutator brush and said stator by way of said retainer.

Abstract: An electric motor in which polarities of a stator and the number of polarities thereof are converted by converting the polarity of current depending on a rotation position of a rotor made of a permanent magnet so as to enhance attraction and repulsion occurring between the rotor and the stator, so that a rotative force of the rotor can be achieved with minimum power.

Abstract: An improved method for the manufacture of a compact brush guide holder assembly which is commonly found on machines in which electricity is to be transferred between an electrically conductive brush element as it moves and makes contact with a rotatable conductor such as a commutator. The brush holder assembly constructed of material that reduces antifrictional forces having a guiding channel or chamber defined by upper and lower curvilinear surface for supporting the electrically conductive brush element which receives compressed tension from a fixed non-removable constant force spring which is composed of a beam uncoiled section in addition to a coiled section having integrally fixed mounted Teflon bushings that are free to ride and float horizontally and vertically on mounting post that pass through its center.

Abstract: A brush support plate (1) is disclosed. The current supply to the brush (21) is effected by way of conductor paths (10, 11) which are almost completely embedded into the material of the support plate. Recesses (30, 31, 32, 33) permit welding or soldering the strands (20) of the brush (21) to the conductor paths (10, 11).

Abstract: In a permanent magnet field starter motor, a ring shaped enlarged portion is formed at an end of a yoke and has an inner diameter Da which is larger than an inner diameter of the yoke. The inner diameter Da of the enlarged portion is at least as large as an outer diameter Db of a brush member holder plate which is inserted to an inner side of the enlarged portion, so that the radial position between the yoke and the brush member holder plate is directly aligned. A cut-out groove is formed on the yoke for inserting a bush member. The bush member is inserted into the cut-out groove, so that a thrust direction position of an outside portion lead wire, a lead terminal, and a lead wire is determined. A projection formed on the brush member holder plate has a width Wb which is at least as large as the width Wa of the cut-out groove. By inserting projection into the cut-out groove, the circumferential position between the yoke and the brush member holder plate is aligned.

Abstract: A power tool has a mechanism to reverse a motor. The mechanism includes a first member secured with the motor surrounding the motor commutator. A pair of electrical contacts are supported in the first member. A second member is rotatable on the fist member. The second member carries a pair of brush holders which include electrical contacts. As the second member is rotated in the first member, the electrical contacts of the brush holders, as well as the electrical contacts in the first member, electrically couple with one another from a first position to a second position which relates to a forward and reverse direction of the motor. A lever moves the second member between its first and second positions.

Abstract: A brush holder plate includes plugs with a blade terminal and an extension connected thereto. The plugs with their extension are inserted from below into the brush holder plate which is provided with sleeves on its top surface. The extension is passed through the sleeve, and a strand is slipped from the other side into the sleeve. An electrical connection between the strand and the plug is produced by pinching the sleeve, on the one hand, and the plug is fixed mechanically on the brush holder plate, on the other hand.

Abstract: A brush holder assembly having a housing die cast from zinc which includes a plurality of integrally formed heat-sinking fins and an integrally formed mounting wall. The heat-sinking fins permit the housing of the brush holder assembly to dissipate heat generated during operation of a motor to which the brush holder assembly is secured. The integrally formed mounting wall enables the entire brush holder assembly to be quickly and easily secured to a housing of a motor. The heat-sinking fins further help to prolong the life of the brush housed within the brush holder assembly.

Abstract: Disclosed is an improvement to the stability of D.C. motor brushes mounted in brush boxes with wings is improved by angling the wings toward the commutator such that the brush spring contacts the brush at one or more points intermediate the ends of the brush. Improved cooling is provided by utilizing an end plate with apertures and a brush plate which in combination with the commutator, provides a brush plate aperture for cooling air flow. In a preferred embodiment, speed variations of the motor can be achieved by selectively disconnecting one or more brushes in a four brush embodiment reducing the torque and rotating speed of the motor. In a preferred embodiment, the use of a diode to interconnect same polarity brushes permits a speed change to be accomplished by selectively connecting one or the other end of the diode.

Abstract: A combination motor brush support and electromagnetic suppression circuit comprises an assembly having a base which is affixable to a portion of a motor housing and which supports all components requiring precise mechanical alignment, including motor brushes, brush guides and brush springs. The base can also support the choke coils, and at least some of the capacitors of the noise suppression circuitry. The base includes a terminal support board affixed to, and projecting therefrom. The terminal support board has at least one of the capacitors of the noise suppression circuitry retained thereupon, and provides a set of motor contact terminals which are in electrical communication with the motor brushes supported on the base. The support member of the present invention functions as its own assembly tool for supporting and retaining the coils, capacitors, springs and the like.

Abstract: An electric motor structure is shown in which a yoke supporting an armature shaft is fixedly secured to a bracket with set bolts passing through the yoke in the axial direction and in which the distances between a pair of brushes and a pair of internal terminals connected thereto are substantially equal to each other. In a base unit, set bolt through holes for allowing the penetration of a pair of set bolts and a pair of brush holders are disposed on diameter lines perpendicular to each other, and further, a pair of internal terminal plates are disposed to straddle the outer circumference of one set bolt. The inserting tip portion of a coupler unit equipped with external terminal plates electrically connected to the internal terminal plates is branched into two sections. When the coupler unit is connected to the internal terminal plates the set bolt is positioned between the branched sections of the coupler unit.

Abstract: The invention relates to a collector machine, in particular an electric motor, having a rotor, rotatably supported in a housing and having an armature winding and a collector. The collector for electrically contacting the armature winding cooperates with at least two brushes resting slidingly on the collector, which are each displaceably guided counter to an initial tension in a respective quiver provided for each brush on a brush carrier plate. In accordance with the improvement according to the invention, at least one contact element, which is part of an associated quiver and for one pole of the electrical contacting establishes an electrically conductive contact with the housing.

Abstract: The present invention offers a commutation assembly for an electrical motor, whereby a constant optimal pressure is maintained upon the commutator of the motor.

Abstract: In a starter, a power supply terminal connected to a solenoid coil of a magnet switch and connectable to a starter external circuit is provided on an end cover. The power supply terminal includes a terminal metal member, a bimetal which interrupts electric conduction between the solenoid coil and the terminal metal member at the time of temperature rise above a predetermined temperature, and a casing contacting a foot part of the terminal metal member and encasing the bimetal therein. The bimetal responds to each of the excessive heating of the terminal metal member and excessive energization current to interrupt the conduction. In case of a single axis-type starter, the power supply terminal is provided on a recess so that the terminal metal member does not extend axially beyond the rear end face of the end cover.

Abstract: An improved method for the manufacture of a compact brush guide holder assembly which is commonly found on machines in which electricity is to be transferred between an electrically conductive brush element as it moves and makes contact with a rotatable conductor such as a commutator. The brush holder assembly has an open body guiding channel, or chamber, for supporting the electrically conductive brush element which receives compressed tension from a fixed non-removable constant force spring which is composed of a beam uncoiled section in addition to a coiled section having fixed mounted Teflon bushings that are free to ride and float horizontally and vertically on mounting post that pass through its center. Upon compression, the contour structural integrity and memory characteristics of the constant force spring are maintained as it self adjusts to the dynamic loads and tension requirements of a rush as it biases a commutator.

Abstract: A brush holder holding a brush has a brush-accommodating hole accommodating the brush. A heat release groove is formed on one surface of peripheral surfaces forming the brush-accommodating hole. The heat release groove is formed at the side of the peripheral surface, of the brush holder, confronting a side surface of the brush at which a pig tail is fixed such that the heat release groove extends in a thickness direction of the brush holder which partitions a first space located at a side in which an armature is accommodated from a second space located at an opposite side in which an electromagnetic switch is accommodated. The heat release groove communicates the first and second spaces with each other. A wall surface of the heat release groove confronting the side surface of the brush is inclined such that the distance between the side surface and the wall surface becomes gradually greater rearward from the commutator surface in a thickness direction of the brush holder.

Abstract: A feeding coupler is shown, formed as part of a brush holder. Feeding terminals are positioned within the feeding coupler rather than being embedded at the time of molding the brush holder using a resin.The feeding coupler is shaped like a cylinder having a closed end and an opening on a side thereof that is in facing relationship with a yoke. The feeding terminals and a retainer for positioning and supporting the feeding terminals are positioned within the opening. The retainer has a holding portion, which is sandwiched between the brush holder and yoke to prevent the retainer from coming off through the opening.

Abstract: In a starter for an internal combustion engine, comprising: a pinion; shift mechanism for moving the pinion into mesh with a ring gear of the engine; a housing for accommodating the pinion and the shift mechanism; an electric motor for rotating the pinion; a substantially cylindrical motor casing for accommodating the electric motor; a contact unit for selectively providing electric power to the electric motor; a brush holder stay disposed between the housing and the motor casing, the brush holder stay having a cavity opened toward the motor casing and the contact unit being mounted in the cavity; and a cover for covering the cavity of the brush holder stay, the cover is made of a flexible member so that the cover is naturally curved, and the cover is disposed between the brush holder stay and the motor casing with its concave surface facing the brush holder stay so that the cover is pushed toward the brush holder stay by an axial end of the motor casing.

Abstract: A D.C. motor and an associated switch circuit for selecting between forward and reverse motor rotation about a motor axis. Two armature winding portions are disposed on an armature core, A magnetic flux source on the stator provides magnetic flux across an air gap for interaction with these winding portions. One winding portion, when energized, causes armature rotation in a forward sense; the other winding portion, when energized, causes armature rotation in a reverse sense. The associated switch circuit contains first circuit branch, including a first selectively operable switch, connected via certain brushes and commutator to include the one winding portion, and a second circuit branch, including a second selectively operable switch, connected via certain brushes and commutator to include the other winding portion.

Abstract: In a starter, an armature is covered with a cylindrical yoke. A rear end opening portion of the yoke is spread perpendicularly outward so as to form a flange. A disc portion having a larger outer circumferential portion than the outer diameter of the cylindrical portion of the yoke is formed. A spigot portion provided in the outer circumference of the disc portion is fitted to a spigot portion provided in the frontmost of a cylindrical portion of a metal rear bracket so that the yoke and the rear bracket are fixedly connected to each other. Therefore, a brush device not limited by the outer diameter of the yoke can be provided. Accordingly, a long-life starter can be obtained by using sufficiently long brushes.

Abstract: Power supply is accomplished via two rails, which are arranged in one plane and which in each case have lugs, which can be bent out from the rail plane. In this case, contact arm of at least one lug is run away over a rail. In this way, a system which is quick to install and which, moveover, is quickly extended in the axial direction is produced.

Abstract: A brush holder is held between a yoke of a starter motor and an end frame made of resin. The brush holder has an engaging guide portion projecting axially therefrom and engaging the yoke and the end frame and a projected peripheral portion projecting outside from peripheral surfaces of the yoke and that of the end frame. The brush holder contacts the yoke and the end frame at cylindrical surfaces thereof and surfaces perpendicular to the cylindrical surfaces. This construction allows the brush holder to be prevented from loosening, thus improving the vibration proof and durability of the brush holder. Further, the brush holder contacts the yoke and the end frame at the cylindrical surfaces thereof and the surfaces perpendicular to the cylindrical surfaces, thus dissipating the heat of a brush through the brush holder and the yoke more efficiently.

Abstract: A series motor armature support assembly comprises a bearing receiving member (60), a pair of legs (62, 64) extending from the bearing receiving member (60), and a brush holding assembly receiving member (66, 68) coupled with each leg. The brush holding assembly receiving member (66, 68) includes a ledge (110, 110') coupled with a leg (62, 64), a stop (114, 114') coupled with the ledge (110, 110'), and a support (122, 122') extending from the bearing receiving member (60) towards the ledge (110, 110'). A securing member (70, 72) is coupled with the legs and secures the support to a stator (34), which is secured to a base (32). A brush holding assembly (80) is received in the brush holding member (66, 68). The brush holding assembly (80) includes a brush receiving member (160), a terminal connector (162) coupled with the brush receiving member (160), and a biasing retention member (164) coupled with the brush receiving member (160).

Abstract: A miniature electric motor having a wound rotor uses brush gear 20 comprising strips 23 formed from flexible printed circuit board material 22 having a conductive layer 24 and a supporting layer 25. The conductive layer 24 is electrically connected to motor terminals 19 and to a contact portion 26 arranged for making sliding contact with a commutator of the motor. The contact portion 26 of the brush 21 may be coated with a precious metal for contact or corrosion resistance requirements. The backing material 25, preferably polyimide, is chosen of a desired thickness to provide strength, resilience and vibration damping characteristics while remaining flexible.

Abstract: A brush holder assembly comprises a non-conductive brush holder body covered by a printed wiring board cover. The brush holder body includes a brush cavity for holding a brush, a spring cavity for holding a spring and a shunt wire cavity for holding a shunt wire. The spring is configured to hold the brush in contact with a commutator at a constant brush pressure throughout the entire length of brush travel. The brush holder body and printed wiring board cover are configured to enclose the brush, spring and shunt wire thus protecting the brush, spring and shunt wire.

Abstract: A brush assembly for an electric motor comprises a brush for making sliding contact with a commutator, the brush being fitted to an end of an elongate resilient electrically conductive brush arm fixed to a brush mounting plate. The brush and brush arm are arranged to ensure that the brush contacts the commutator at a single point in the vicinity of a side face of the brush so that the resilient urgings of the brush arm causing the brush to bear on the commutator surface creates a lateral twist in the elongate brush arm.