# US 4,396,850 A · Brush board assembly for dynamoelectric machine with flat end commutator

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- Number: US 4,396,850 A
- Document ID: US4396850A
- Status: Granted
- Kind: A
- Application number: 06/338,933
- Filed: 1982-01-12
- Granted: 1983-08-02
- Earliest claimed: 1982-01-12
- Assignees: The Singer Company
- Inventors: John A. Herr
- Web page: https://patentgrep.com/patent/US4396850A

## CPC

- H02K 5/145: {Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes}
- H01R 39/06: other than with external cylindrical contact surface, e.g. flat commutators
- Y10S 310/06: Printed-circuit motors and components
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A brush board for a dynamoelectric machine is formed with resilient arms which are an integral part of the board and have commutator engageable brushes affixed at the free ends thereof. The board carries printed circuitry which extends to the free end of the arms and connects with the brushes.

## Claims

### Claim 1

A brush board assembly for a dynamoelectric machine comprising a mounting board of a resilient non-conductive material in the form of a ring including as an integral part of the board, a pair of cresent shaped flexible arms which are separate from an outer annular portion of the board by arcuate gaps and which have diametrically opposite free end portions that are movable out of the plane of the outer annular portion of the board; a commutator engageable brush on each end portion of the arms; and printed circuitry on the outer annulr portion of the board extending therefrom along each of the arms to connect with the brush thereon.

### Claim 2 (depends on 1)

A brush board assembly according to claim 1 wherein the brushes are cemented to the printed portions of the circuitry on said arms with a conductive epoxy cement.