US3375384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous motor having permanent magnetic rotors
Assignee: US Philips Corp
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Filing: 1963-10-09
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Granted: 1968-03-26
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Expires: 1983-10-09
Abstract
No abstract record available.
Inventors
- 👤 Thees Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:59
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/14; H02K21/18; H02K21/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A SYNCHRONOUS MOTOR COMPRISING A STATOR COMPOSED OF MAGNETIC MATERIAL, AT LEAST ONE STATOR WINDING MOUNTED THEREON, A PERMANENT MAGNET ROTOR HAVING AT LEAST ONE PAIR OF POLES AND MOUNTED TO ROTATE WITHIN SAID STATOR, A PAIR OF INPUT TERMINALS FOR SUPPLYING ALTERNATING CURRENT ENERGY TO SAID STATOR WINDING, SAID STATOR WINDING HAVING AN EFFECTIVE RATIO OF REACTANCE X TO RESISTANCE R BETWEEN THE VALUES ZERO AND FIVE AND GREATER THAN THE VALUE 4 MINUS 6.5 E/U, WHEREIN X IS THE EFFECTIVE REACTANCE AND R IS THE EFFECTIVE RESISTANCE LOOKING INTO THE STATOR WINDING FROM SAID INPUT TERMINALS, E IS THE ELECTROMOTIVE FORCE INDUCED IN SAID STATOR WINDING AND U IS THE A.C. TERMINAL VOLTAGE AT SAID INPUT TERMINALS, AND WHEREIN THE RATIO E/U LIES BETWEEN THE VALUES ZERO AND 1.2.
Claim 2
Dependent Claim
131 words
A SYNCHRONOUS MOTOR COMPRISING A STATOR COMPOSED OF MAGNETIC MATERIAL, AT LEAST ONE STATOR WINDING MOUNTED THEREON, A PERMANENT MAGNET ROTOR HAVING AT LEAST ONE PAIR OF POLES AND MOUNTED TO ROTATE WITHIN SAID STATOR, A PAIR OF INPUT TERMINALS FOR SUPPLYING ALTERNATING CURRENT ENERGY TO SAID STATOR WINDING, SAID STATOR WINDING HAVING AN EFFECTIVE RATIO OF REACTANCE X TO RESISTANCE R BETWEEN THE VALUES ZERO AND FIVE AND GREATER THAN THE VALUE 4 MINUS 6.5 E/U, WHEREIN X IS THE EFFECTIVE REACTANCE AND R IS THE EFFECTIVE RESISTANCE LOOKING INTO THE STATOR WINDING FROM SAID INPUT TERMINALS, E IS THE ELECTROMOTIVE FORCE INDUCED IN SAID STATOR WINDING AND U IS THE A.C. TERMINAL VOLTAGE AT SAID INPUT TERMINALS, AND WHEREIN THE RATIO E/U LIES BETWEEN THE VALUES ZERO AND 1.2.
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) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |