Patent US3221236A successfully refreshed from Google Patents.
US3221236A
Expired / Lapsed
US
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Centrifugal switch for motor speed control system
Assignee: Buehler GmbH
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Filing: 1963-02-21
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Granted: 1965-11-30
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Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Scholl Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:22
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/063; H01; H01H; H01H35/00; H01H35/06; H01H35/10; H01H36/00; H02K; H02K11/00; H02K11/20; H02K11/21; H02K11/23; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/924; Y10S388/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
APPARATUS FOR REGULATING THE SPEED OF A DIRECT CURMENT MOTOR COMPRISING, IN COMBINATION, A CENTRIFUGAL GOVERNOR DRIVEN BY THE ARMATURE OF THE MOTOR AND HAVING NORMALLY CLOSED CONTACTS, A COIL ROTATING WITH THE MOTOR ARMATURE, AN AUXILIARY CIRCUIT CONNECTING SAID COIL IN SERIES WITH SAID GOVERNOR CONTACTS, VOLTAGE GENERATING MEANS DRIVEN BY SAID MOTOR ARMATURE FOR SUPPLYING ALTERNATING CURRENT TO SAID AUXILIARY CIRCUIT, A CIRCUIT FOR SUPPLYING OPERATING CURRENT TO SAID MOTOR INCLUDING A DEVICE FOR CONTROLLING SAID OPERATING CURRENT, AND MEANS CONTROLLED BY SAID ROTATING COIL FOR CONTROLLING SAID DEVICE.
Claim 2
Dependent Claim
91 words
APPARATUS FOR REGULATING THE SPEED OF A DIRECT CURMENT MOTOR COMPRISING, IN COMBINATION, A CENTRIFUGAL GOVERNOR DRIVEN BY THE ARMATURE OF THE MOTOR AND HAVING NORMALLY CLOSED CONTACTS, A COIL ROTATING WITH THE MOTOR ARMATURE, AN AUXILIARY CIRCUIT CONNECTING SAID COIL IN SERIES WITH SAID GOVERNOR CONTACTS, VOLTAGE GENERATING MEANS DRIVEN BY SAID MOTOR ARMATURE FOR SUPPLYING ALTERNATING CURRENT TO SAID AUXILIARY CIRCUIT, A CIRCUIT FOR SUPPLYING OPERATING CURRENT TO SAID MOTOR INCLUDING A DEVICE FOR CONTROLLING SAID OPERATING CURRENT, AND MEANS CONTROLLED BY SAID ROTATING COIL FOR CONTROLLING SAID DEVICE.
References Cited (Backward Citations)
US2250141A
Cited
US2981089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |