US3584283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature direct-current motor
Assignee: Individual
•
Filing: 1969-03-11
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Granted: 1971-06-08
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Expires: 1989-03-11
Abstract
Abstract A miniature DC motor the speed of which is controlled in response to centrifugal force and which has two commutators, one of which is provided for supplying the current to the rotor winding, while the other has three segments and two diametrically opposite brushes for electrically connecting two adjacent of these three segments to each other by at least two and preferably three centrifugal contactors.
Inventors
- 👤 Josef Lindner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:07
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/26; H02K23/36; H02K11/00; H02K11/20; H02K11/21; H02K11/23; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/924; Y10S388/925
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A miniature direct-current motor, comprising a rotor having a winding and a shaft, a first commutator fixed upon the rotor shaft and supplying current to the rotor winding, said commutator having two fixed diametrically opposed brushes, a second commutator fixed upon the rotor shaft and having two fixed diametrically opposed brushes, three segments, and at least two centrifugal contactors interconnecting electrically the three segments, means electrically connecting one brush of the firstmentioned commutator with one brush of the second commutator, a source of direct current and means connecting one pole of said source to the other brush of the first-mentioned commutator and connecting the other pole of said source to the other brush of the second-mentioned commutator.
Claim 2
Dependent Claim
117 words
A miniature direct-current motor, comprising a rotor having a winding and a shaft, a first commutator fixed upon the rotor shaft and supplying current to the rotor winding, said commutator having two fixed diametrically opposed brushes, a second commutator fixed upon the rotor shaft and having two fixed diametrically opposed brushes, three segments, and at least two centrifugal contactors interconnecting electrically the three segments, means electrically connecting one brush of the firstmentioned commutator with one brush of the second commutator, a source of direct current and means connecting one pole of said source to the other brush of the first-mentioned commutator and connecting the other pole of said source to the other brush of the second-mentioned commutator.
Claim 3
Dependent Claim
33 words
A miniature direct-current motor as defined in claim 1, in which three centrifugal contactors are provided each of which is adapted to connect two adjacent of said three segments electrically to each other.
Claim 4
Dependent Claim
43 words
A miniature direct-current motor as defined in claim 1, further comprising a transistor, the collector-emitter line of said transistor being connected in series with said first commutator, said two brushes of said second commutator being connected into the base circuit of said transistor.
References Cited (Backward Citations)
US2812454A
Cited
US3202898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |