US3264538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brushless transistor commutated motor
Assignee: Individual
•
Filing: 1961-12-06
•
Granted: 1966-08-02
•
Expires: 1981-12-06
Abstract
No abstract record available.
Inventors
- 👤 Harrison D Brailsford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:07
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/12; H02K33/14; H02K29/00; H02K29/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
AN MOTOR COMPRISING AN ARMATURE HAVING AT LEAST ONE PAIR OF MAGNETIC POLES; A STATOR COMPRISING AT LEAST ONE PAIR OF COILS; A RUNNING CIRCUIT COMPRISING A PAIR OF SOLID STATE AMPLIFYING DEVICES EACH HAVING A LOAD CIRCUIT AND A CONTROL CIRCUIT, THE LOAD CIRCUIT OF ONE OF SAID DEVICES BEING CONNECTED IN SERIES WITH ONE OF SAID COILS AND THE LOAD CIRCUIT OF THE OTHER OF SAID DEVICES BEING CONNECTED IN SERIES WITH THE OTHER OF SAID COILS; A PAIR OF COUPLING CIRCUITS CONNECTING, RESPECTIVELY, THE LOAD CIRCUITS OF EACH OF SAID DEVICES TO THE CONTROL CIRCUITS OF THE OTHER OF SAID DEVICES TO RENDER SAID RUNNING CIRCUIT SELFOSCILLATORY; AND STARTING MEANS COMPRISING RESILIENTLY BIASED ELECTRICAL CONTACT MEANS CONNECTED TO THE CONTROL CIRCUIT OF SAID DEVICES, AND MEANS TO ACTUATE SAID CONTACT MEANS AT PREDETERMINED POSITIIONS OF SAID ARMATURE AT LOW ARMATURE SPEEDS TO ENERGIZE SAID DEVICES ALTERNATELY.
Claim 2
Dependent Claim
149 words
AN MOTOR COMPRISING AN ARMATURE HAVING AT LEAST ONE PAIR OF MAGNETIC POLES; A STATOR COMPRISING AT LEAST ONE PAIR OF COILS; A RUNNING CIRCUIT COMPRISING A PAIR OF SOLID STATE AMPLIFYING DEVICES EACH HAVING A LOAD CIRCUIT AND A CONTROL CIRCUIT, THE LOAD CIRCUIT OF ONE OF SAID DEVICES BEING CONNECTED IN SERIES WITH ONE OF SAID COILS AND THE LOAD CIRCUIT OF THE OTHER OF SAID DEVICES BEING CONNECTED IN SERIES WITH THE OTHER OF SAID COILS; A PAIR OF COUPLING CIRCUITS CONNECTING, RESPECTIVELY, THE LOAD CIRCUITS OF EACH OF SAID DEVICES TO THE CONTROL CIRCUITS OF THE OTHER OF SAID DEVICES TO RENDER SAID RUNNING CIRCUIT SELFOSCILLATORY; AND STARTING MEANS COMPRISING RESILIENTLY BIASED ELECTRICAL CONTACT MEANS CONNECTED TO THE CONTROL CIRCUIT OF SAID DEVICES, AND MEANS TO ACTUATE SAID CONTACT MEANS AT PREDETERMINED POSITIIONS OF SAID ARMATURE AT LOW ARMATURE SPEEDS TO ENERGIZE SAID DEVICES ALTERNATELY.
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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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |