Patent US3221235A successfully refreshed from Google Patents.
US3221235A
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Oscillator controlled by centrifugal switch for regulating motor speed
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
2026-10-25 17:44
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/06; H01H35/10; H02; H02P; H02P7/00; H02P7/06; H02P7/063; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/924; Y10S388/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
APPARATUS FOR REGULATING THE SPEED OF A DIRECT CURRENT MOTOR HAVING A ROTARY ARMATURE, COMPRISING, IN COMBINATION, A CURRENT REGULATOR CONTROLLING THE CURRENT SUPPLIED TO THE ARMATURE, AN ATTENUATABLE OSCILLATOR SUPPLYING CURRENT TO CONTROL SAID REGULATOR FOR REDUCING THE CURRENT SUPPLIED TO THE ARMATURE, DAMPING MEANS FOR ACTING ON SAID OSCILLATOR TO STOP OSCILLATION THEREOF, AND MEANS RESPONSIVE TO THE SPEED OF SAID ARMATURE AND BEING EFFECTIVE AT A PREDETERMINED SPEED TO RENDER SAID DAMPING MEANS EFFECTIVE TO STOP SAID OSCILLATOR.
Claim 2
Dependent Claim
81 words
APPARATUS FOR REGULATING THE SPEED OF A DIRECT CURRENT MOTOR HAVING A ROTARY ARMATURE, COMPRISING, IN COMBINATION, A CURRENT REGULATOR CONTROLLING THE CURRENT SUPPLIED TO THE ARMATURE, AN ATTENUATABLE OSCILLATOR SUPPLYING CURRENT TO CONTROL SAID REGULATOR FOR REDUCING THE CURRENT SUPPLIED TO THE ARMATURE, DAMPING MEANS FOR ACTING ON SAID OSCILLATOR TO STOP OSCILLATION THEREOF, AND MEANS RESPONSIVE TO THE SPEED OF SAID ARMATURE AND BEING EFFECTIVE AT A PREDETERMINED SPEED TO RENDER SAID DAMPING MEANS EFFECTIVE TO STOP SAID OSCILLATOR.
References Cited (Backward Citations)
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 |