US4881000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armature for an electric motor
Assignee: Johnson Electric SA
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Filing: 1987-07-29
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Granted: 1989-11-14
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Expires: 2007-07-29
Abstract
Abstract An armature for an electric motor comprises a winding having connector portions and a plurality of combined commutator segments and terminals. The terminals each have at least one slot which straddles and grips a respective connector portion to electrically connect the connector portion to a commutator segment. A base supports the commutator segments and a separate terminal support has a plurality of housing locating the terminals. By making the base separate to the terminal support, the armature may be wound with only the terminal support in position, the base being added afterwards, thus giving more room during winding. In a preferred embodiment, the support is formed of thermoplastics material, e.g. thermosoftening nylon, so that it is able to flex during insertion of the terminals and the base is of a material which will withstand higher temperatures, e.g. thermosetting plastics material or anodised aluminum.
Inventors
- 👤 Patrick S. Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/32; H02; H02K; H02K13/00; H02K13/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011; Y10T29/49012
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
65 words
An armature for an electric motor, comprising a winding having connector portions, a plurality of commutator segments, each commutator segment having an integral terminal provided with a slot which straddles and grips a respective connector portion, a commutator base for supporting said commutator segments, and a terminal support separate from the base, aid support having a plurality of housings in which the terminals are located.
Claim 2
Dependent Claim
65 words
An armature for an electric motor, comprising a winding having connector portions, a plurality of commutator segments, each commutator segment having an integral terminal provided with a slot which straddles and grips a respective connector portion, a commutator base for supporting said commutator segments, and a terminal support separate from the base, aid support having a plurality of housings in which the terminals are located.
Claim 3
Dependent Claim
74 words
An armature for an electric motor, comprising a winding having connector portions, a plurality of commutator segments, each commutator segment having an integral terminal provided with a slot which straddles and grips a respective connector portion, a commutator base for supporting said commutator segments, and a separate terminal support having plurality of housings in which the terminals are located, wherein the base and the support are separately mountable on a shaft of the armature.
Claim 4
Dependent Claim
74 words
An armature for an electric motor, comprising a winding having connector portions, a plurality of commutator segments, each commutator segment having an integral terminal provided with a slot which straddles and grips a respective connector portion, a commutator base for supporting said commutator segments, and a separate terminal support having plurality of housings in which the terminals are located, wherein the base and the support are separately mountable on a shaft of the armature.
Claim 5
Dependent Claim
90 words
An armature for an electric motor, comprising a winding having connector portions, a plurality of commutator segments, each commutator segment having an integral terminaI provided with a slot which straddles and grips a respective connector portion, a commutator base for supporting said commutator segments, and a separate terminal support having plurality of housings in which the terminals are located, wherein the terminal support is formed of thermoplastics material and the commutator base is made of a material which will withstand higher temperatures than the thermoplastics material of the terminal support.
Claim 6
Dependent Claim
90 words
An armature for an electric motor, comprising a winding having connector portions, a plurality of commutator segments, each commutator segment having an integral terminaI provided with a slot which straddles and grips a respective connector portion, a commutator base for supporting said commutator segments, and a separate terminal support having plurality of housings in which the terminals are located, wherein the terminal support is formed of thermoplastics material and the commutator base is made of a material which will withstand higher temperatures than the thermoplastics material of the terminal support.
Claim 7
Dependent Claim
66 words
An armature as claimed in claim 1, wherein the connector portions are coated with insulation and the slot in each terminal has two cutting edges for cutting through the insulation of the connector portion as it is drawn into the slot to establish electrical contact between the connector portion and the terminal, the slot maintaining said electrical contact as it straddles and grips said connector portion.
Claim 8
Dependent Claim
28 words
An armature as claimed in claim 1, wherein each terminal has at least two parallel arms, each arm having a slot which straddles and grips said connector portion.
Claim 9
Dependent Claim
21 words
An armature as claimed in claim 1, wherein each terminal has a barb for retaining said terminal in a respective housing.
Claim 10
Dependent Claim
16 words
An armature as claimed in claim 1, wherein the commutator base is of thermosetting plastics material.
Claim 11
Dependent Claim
22 words
An armature as claimed in claim 1, wherein the commutator base is of metal provided with an insulating layer of metal oxide.
Claim 12
Dependent Claim
65 words
An electric motor provided with an armature comprising a winding having connector portions, a plurality of commutator segments, each commutator segments having an integral terminal provided with a slot which straddles and grips a respective connector portion, a commutator base for supporting said commutator segments, and a terminal separate from the base, said support having a plurality of housings in which the terminals are located.
Claim 13
Dependent Claim
65 words
An electric motor provided with an armature comprising a winding having connector portions, a plurality of commutator segments, each commutator segments having an integral terminal provided with a slot which straddles and grips a respective connector portion, a commutator base for supporting said commutator segments, and a terminal separate from the base, said support having a plurality of housings in which the terminals are located.
Claim 14
Dependent Claim
109 words
A commutator for an electric motor, comprising a plurality of commutator segments, each commutator segment having an integral terminal provided with a slot, a terminal support mountable on a shaft of the motor, said terminal support having a plurality of housings each for receiving a said terminal, a base separate to said support, said base being mountable on said shaft adjacent the support and being arranged to support said commutator segments, wherein said support may be mounted on a shaft of a motor and wire of an armature winding may be wound through a said housing, and thereafter said base and said segments may be mounted on the shaft.
Claim 15
Dependent Claim
109 words
A commutator for an electric motor, comprising a plurality of commutator segments, each commutator segment having an integral terminal provided with a slot, a terminal support mountable on a shaft of the motor, said terminal support having a plurality of housings each for receiving a said terminal, a base separate to said support, said base being mountable on said shaft adjacent the support and being arranged to support said commutator segments, wherein said support may be mounted on a shaft of a motor and wire of an armature winding may be wound through a said housing, and thereafter said base and said segments may be mounted on the shaft.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |