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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7675216 | Brush spring retainers Brush spring assemblies for heavy-duty use are addressed. Such assemblies may include constant-force springs used to bias carbon brushes into contact with commutator surfaces. They additionally may include temporary capture mechanisms for the springs, allowing the s... | 03/09/2010 |
| 7466056 | Dynamoelectric machine brush holder assembly and method Disclosed herein is an apparatus that relates to a dynamoelectric machine brush holder assembly. The apparatus includes, a plurality of brushes, a plurality of brush holders each having a cavity receptive of one of the plurality of brushes and having two protrusions... | 12/16/2008 |
| 7420311 | Brush arrangement for an electric machine A brush device for an electric machine having at least one brush and at least one element such as a helical, scroll, or plunger spring for pressing each brush against a rotating contact element, for example a commutator. In at least one further element for example a... | 09/02/2008 |
| 7417354 | Brush holder apparatus, brush assembly, and method Devices and methods of use for brush holder assemblies are disclosed. Brush holder assemblies including a mounting block and a brush holder are disclosed. Also illustrated is a brush holder assembly including a first portion in sliding engagement with a second porti... | 08/26/2008 |
| 7414346 | Brush holder for dynamo-electric machine Terminal plates are located in a brush holder base, a spring and a brush are located in the brush holder base, and the terminal plates are connected to pigtails in an area within 90° in a backside of an introducing portion of the pigtails in the brush, whereby oper... | 08/19/2008 |
| 7358641 | Brush device for rotary electric machine A brush device assembled in a vehicular alternator is composed mainly of a pair of brushes, a pair of springs, and a brush holder. The brush holder accommodates the brushes and the springs. The springs push the brushes toward slip rings placed on and fixed to a rota... | 04/15/2008 |
| 7358640 | Automotive rotary electric machine The present invention provides an automotive rotary electric machine enabling brush abrasion limit detection reliability to be increased and stable brush abrasion limit detection indication to be performed. The construction thereof is provided with a detecting termi... | 04/15/2008 |
| 7298065 | Brush assembly A brush assembly 22 for an electric motor 10 has brush holder 24 supporting a brush 26 and a brush spring. The brush holder 24 has a strip of brass having a central portion and two end portions 28, 40. The central portion ha... | 11/20/2007 |
| 7282125 | Contact element holder A contact element holder, in particular a brush holder for commutator or wiper ring machines, has a carrier that can be secured to the machine housing and at least one quiver, held on the carrier and pointing toward the rotor, for displaceably receiving a contact el... | 10/16/2007 |
| 7274127 | Automotive alternator and automotive alternator brush abrasion detection system A brush holding apparatus is mounted to an inner wall surface of a rear bracket and a cap mounted to a head portion of a brush holder portion is exposed through an opening in the rear bracket. Brushes are housed inside brush insertion apertures of the brush holder p... | 09/25/2007 |
| 7193349 | Brush holder for a carbon brush An electric motor, in particular a motor and gear box unit for activating functional equipment in a vehicle, includes a rotor shaft carrying a commutator co-operating with conductive brushes disposed in brush supports fixed to a printed circuit card; the motor is pr... | 03/20/2007 |
| 7180219 | DC motor with externally mounted carbon brush This invention discloses a DC motor with externally mounted carbon brushes, comprising a front end cover, a housing, magnet, a rotor, a commutator and a back end cover, characterized in that the outer wall of the back end cover is provided with two mounting holes fo... | 02/20/2007 |
| 7179090 | Integral dual-component current collection device A dual-nature, uni-constructed device, suitable for conducting electricity between two objects in relative motion, comprises two compatible elements each having a straight section and a sinuous section. The two elements are combined to form a unified whole whereby t... | 02/20/2007 |
| 7173359 | Brush holder assembly for an electric motor A universal motor has a brush cage assembly in which a U-shaped clip 34 is located about a wall of a through hole 28 of a bearing bracket 24 for receiving a brush cage 30. The clip 34 has an outer limb 42 with inwardly and r... | 02/06/2007 |
| 7148600 | Electrical current transferring and brush pressure exerting interlocking slip ring assembly An annular stator holder within a homopolar motor housing is positioned within magnetic fields established by magnet coils positioned in surrounding relation to brushes in sliding contact with the motor rotor. Also enclosed within the stator holder is a slip ring pr... | 12/12/2006 |
| 7141906 | Brush holder apparatus, brush assembly, and method Devices and methods of use for brush holders are disclosed. A brush holder assembly including a brush catch and a brush release is disclosed. Also illustrated is a brush holder assembly including a first portion in sliding engagement with a second portion. Sliding e... | 11/28/2006 |
| 7132777 | Electric motor and brush retaining assembly The present invention generally provides a motor-fan unit including a motor assembly having a shaft, a commutator supported on the shaft, and a pair of brushes in electrical contact with the commutator, a fan assembly having an impeller coupled to the shaft, an end ... | 11/07/2006 |
| 7122935 | Brush holder apparatus, brush assembly, and method Devices and methods of use for brush holders are disclosed. A brush holder assembly including a brush catch and a brush release is disclosed. Also illustrated is a brush holder assembly including a first portion in sliding engagement with a second portion. Sliding e... | 10/17/2006 |
| 7119467 | Current limiting means for a generator The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding, a leak impedance can be achieved which may be used, according to the ... | 10/10/2006 |
| 7116032 | Automotive alternator and automotive alternator brush abrasion detection system A brush holding apparatus is mounted to an inner wall surface of a rear bracket and a cap mounted to a head portion of a brush holder portion is exposed through an opening in the rear bracket. Brushes are housed inside brush insertion apertures of the brush holder p... | 10/03/2006 |
| 7095151 | Segmented brush tube structure for acoustic energy dissipation A brush tube structure 10 is provided for holding a brush 14 of a motor. The brush tube structure includes a base 15 and a plurality of fingers 12 extending from the base in a cantilevered manner and in direction of travel of the brush. T... | 08/22/2006 |
| 7042119 | Linear motor A linear motor includes a row of permanent magnets fixed at a position above a stator, and a plurality of magnetic pole members fixed at a position below a movable member. The row of permanent magnets is formed from N poles and S poles alternately arranged at given ... | 05/09/2006 |
| 7034431 | Brush holding plate for an electric motor, corresponding electric motor and assembly method A brush holding plate includes cartridges and brushes, which are guided into the cartridges. The brushes are guided in a spring-loaded manner in the radial direction towards a central opening in the brush holding plate. The cartridges are arranged on the brush holdi... | 04/25/2006 |
| 7034430 | Brush holder apparatus, brush assembly, and method Devices and methods of use for brush holders are disclosed. A brush holder including an over-center locking device is disclosed. Also illustrated are methods and devices for maintaining brush pressure against a moving conductive surface using a spring without a back... | 04/25/2006 |
| 7014432 | Fuel pumping unit, with a plurality of commutator brush assemblies with engaging members for restricting brush movement toward the pump motor section A fuel pump includes a housing, a pump section, a motor section including a commutator, a cover disposed at one end of the housing, a pair of brushes disposed in a pair of brush holes formed in the cover to be in contact with the commutator; and a pair of brush spri... | 03/21/2006 |
| 6949861 | Carbon brush holder A carbon brush holder includes a tubular copper conducting receptacle, a lead wire terminal riveted to the outside wall of the copper conducting receptacle, and an electrically insulative hollow holder base holding the copper conducting receptacle, the electrically ... | 09/27/2005 |
| 6936949 | Rotation angle detecting apparatus A rotation angle detector includes a stator core (2) comprised of a plurality of core sheets (4) each having plural core members (4a) each including a tooth and a yoke portion (5a, . . . , 5h, 4b)... | 08/30/2005 |
| 6933650 | Wear indicator The present invention relates to a wear indicator for a motor carbon brush which includes a housing, carbon brushes, an elastic element, a circuit board with an alarm indicator light and an electric probe disposed on the circuit board. The electric probe is connecte... | 08/23/2005 |
| 6924577 | Brush box assembly A brush box assembly for use in an electric motor and an electric motor having a brush biasing mechanism that also retains the brushes to allow installation of a sliding electrical contact assembly is described. The brush box assembly has a plurality of brush holder... | 08/02/2005 |
| 6909218 | End cap and brush box assembly A end cap and brush box assembly for a mechanically commutated electric motor including an end cap constructed from high temperature material which also has resilient mechanical properties. The end cap and brush box assembly includes a two piece brush box having a f... | 06/21/2005 |
| 6873083 | Double brush assembly A multi-brush cage assembly for a subfractional horsepower electric motor has two brushes 22, 23 received in separate chambers 24, 25 of the cage and urged by springs 26, 27 towards a commutator 15 of the motor. An L-shaped changeover lev... | 03/29/2005 |
| 6867528 | Dynamoelectric machine and method for mounting a brush assembly to a brush holder A brush assembly is constructed such that a brush and a brush terminal are linked by means of a pigtail, a brush spring is disposed under compression between the brush and the brush terminal, and a cylindrical guide is disposed near the brush terminal inside the bru... | 03/15/2005 |
| 6856066 | Brush device A brush device has a brush that slides against an outer circumferential surface of a cylindrical rotor. The brush device includes a base member, a terminal retained by the base member, an electric wire, which connects the brush to the terminal, and a cylindrical bru... | 02/15/2005 |
| 6836050 | Terminal structures for motor with brush to connect motor to external circuit A motor with brush includes a rotor having a rotary shaft and a commutator retained at the rotary shaft, two brush sections each having a plane surface in an axial direction of the rotor and in sliding contact with the commutator, and two brush terminals that are in... | 12/28/2004 |
| 6831381 | Electric drive, especially for motor vehicles In an electrical drive mechanism, in particular for motor vehicles, having a commutator motor (14) disposed in a housing (10), which commutator motor (14) has a rotor shaft (17) with a commutator (22) non-rotatably supported on it ... | 12/14/2004 |
| 6800981 | Tubular brush holder A brush holder including a tubular brush box, a baseplate configured to be fastened to an electrical brush and movable in the brush box, a resilient multi-contact lining disposed in the brush box between the baseplate and an inner wall of the brush box, and a spring... | 10/05/2004 |
| 6787962 | Starter with overheat protection device including brush device The brush device of a starter with an overheat protection device of the present invention is provided with brush holders, brushes slidably supported in the brush holders, respectively, springs contacting one sides of the brushes to press the brushes in the radial, i... | 09/07/2004 |
| 6750585 | Brush assembly of alternator for vehicle having improved brush and wiring to prevent lead wire interference during brush extraction and retraction Disclosed is a brush assembly of an alternator for a vehicle including a brush holder including a hollow brush holder body, and wired brushes each received in the brush holder, and adapted to be urged against a slip ring fitted around a rotor shaft by a spring along... | 06/15/2004 |
| 6731040 | Brush motor for electric power steering system A brush motor for an electric power steering system comprises a four-pole field portion 3, an armature 4 having windings 9 wound around a core 5 with 22 slots 8 to constitute a lap winding, hooks 12 which are formed on one e... | 05/04/2004 |
| 6680556 | Base plate for a carbon brush including means for engaging and disengaging the brush A brush holding apparatus for at least one carbon brush includes a support plate with at least one brush guide, a spring element constructed and arranged for urging a carbon brush having a longitudinal axis mounted in the brush guide in a direction toward... | 01/20/2004 |
