US3421033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-phase induction electric motor
Assignee: General Electric Co
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Filing: 1966-06-07
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Granted: 1969-01-07
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Expires: 1986-06-07
Abstract
No abstract record available.
Inventors
- 👤 William R Hoffmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:05
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A SINGLE PHASE INDUCTION ELECTRIC MOTOR HAVING A ROTATABLE MEMBER, A STATOR COMPRISING A CORE FORMED OF MAGNETIZABLE MATERIAL HAVING A YOKE SECTION AND HAVING A PLURALITY OF SPACED APART TEETH SECTIONS JOINED TO SAID YOKE SECTION TO PROVIDE A PLURALITY OF COIL ACCOMODATING SLOTS, SAID TEETH SECTIONS INCLUDING TERMINATIONS REMOTE FROM SAID YOKE SECTION FORMING A BORE FOR RECEIVING THE ROTATABLE MEMBER; AND A NUMBER OF COIL GROUPS DISPOSED IN THE SLOTS, WITH EACH COIL GROUP SPANNING A NUMBER OF TEETH SECTIONS AND HAVING A COIL GROUP AXIS; AT LEAST ONE PRESELECTED TOOTH SECTION IN EACH SPANNED NUMBER HAVING MAGNETIC RESTRICTION MEANS IN SPACED RELATION TO THE ASSOCIATED TERMINATION THEREOF; AND SAID PRESELECTED TOOTH SECTION BEING LOCATED IN THE REGION OF A QUADRATURE AXIS DISPOSED AT A DESIRED ELECTRICAL ANGLE WITH RESPECT TO THE COIL GROUP AXIS IN THE DIRECTION OPPOSITE TO THE ROTATIONAL DIRECTION OF THE ROTATABLE MEMBER.
Claim 2
Dependent Claim
151 words
IN A SINGLE PHASE INDUCTION ELECTRIC MOTOR HAVING A ROTATABLE MEMBER, A STATOR COMPRISING A CORE FORMED OF MAGNETIZABLE MATERIAL HAVING A YOKE SECTION AND HAVING A PLURALITY OF SPACED APART TEETH SECTIONS JOINED TO SAID YOKE SECTION TO PROVIDE A PLURALITY OF COIL ACCOMODATING SLOTS, SAID TEETH SECTIONS INCLUDING TERMINATIONS REMOTE FROM SAID YOKE SECTION FORMING A BORE FOR RECEIVING THE ROTATABLE MEMBER; AND A NUMBER OF COIL GROUPS DISPOSED IN THE SLOTS, WITH EACH COIL GROUP SPANNING A NUMBER OF TEETH SECTIONS AND HAVING A COIL GROUP AXIS; AT LEAST ONE PRESELECTED TOOTH SECTION IN EACH SPANNED NUMBER HAVING MAGNETIC RESTRICTION MEANS IN SPACED RELATION TO THE ASSOCIATED TERMINATION THEREOF; AND SAID PRESELECTED TOOTH SECTION BEING LOCATED IN THE REGION OF A QUADRATURE AXIS DISPOSED AT A DESIRED ELECTRICAL ANGLE WITH RESPECT TO THE COIL GROUP AXIS IN THE DIRECTION OPPOSITE TO THE ROTATIONAL DIRECTION OF THE ROTATABLE MEMBER.
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |