Patent US3394296A successfully refreshed from Google Patents.
US3394296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous motor stator circuit employing commutator and rectifier during starting
Assignee: Duracell Inc USA
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Filing: 1966-05-31
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Granted: 1968-07-23
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Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Gianni A Dotto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:13
CPC Classifications
H; H02; H02K; H02K27/00; H02K27/04; H02K27/10; H02K21/00; H02K21/12; H02K21/14; H02K21/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A MOTOR COMPRISING: A ROTOR; A PLURALITY OF STATOR POLES CIRCUMSCRIBING SAID ROTOR; A FIELD COIL FOR ESTABLISHING THE POLARITY OF SAID STATOR POLES; COMMUTATOR MEANS FOR CONTROLLING THE DIRECTION OF CURRENT FLOW THROUGH SAID FIELD COIL, SAID COMMUTATOR MEANS COMPRISING, A FIRST AND SECOND BRUSHES, A THIRD BRUSH, A ROTATING COMMUTATOR ELEMENT FOR ALTERNATELY CONNECTING SAID FIRST AND SECOND BRUSHES TO SAID THIRD BRUSH, SAID ROTATING COMMUTATOR ELEMENT BEING MOUNTED ON A COMMON SHAFT WITH SAID ROTOR, MEANS FOR CONNECTING SAID THIRD BRUSH TO A FIRST SIDE OF AN ALTERNATING CURRENT POWER SOURCE, FIRST AND SECOND UNIDIRECTIONAL SEMICONDUCTOR DEVICES, EACH OF SAID DEVICES HAVING A CATHODE ELECTRODE AND ANODE ELECTRODE, MEANS FOR CONNECTING SAID ANODE ELECTRODE OF SAID FIRST SEMICONDUCTOR DEVICE TO SAID FIRST BRUSH AND SAID CATHODE ELECTRODE OF SAID FIRST SEMICONDUCTOR DEVICE TO A FIRST SIDE OF SAID FIELD COIL, MEANS FOR CONNECTING SAID CATHODE ELECTRODE OF SAID SECOND SEMICONDUCTOR DEVICE TO SAID SECOND BRUSH AND SAID ANODE ELECTRODE OF SAID SECOND SEMICONDUCTOR DEVICE TO SAID FIRST SIDE OF SAID FIELD COIL; AND MEANS FOR CONNECTING A SECOND SIDE OF SAID FIELD COIL TO A SECOND SIDE OF SAID ALTERNATING CURRENT POWER SOURCE.
Claim 2
Dependent Claim
196 words
A MOTOR COMPRISING: A ROTOR; A PLURALITY OF STATOR POLES CIRCUMSCRIBING SAID ROTOR; A FIELD COIL FOR ESTABLISHING THE POLARITY OF SAID STATOR POLES; COMMUTATOR MEANS FOR CONTROLLING THE DIRECTION OF CURRENT FLOW THROUGH SAID FIELD COIL, SAID COMMUTATOR MEANS COMPRISING, A FIRST AND SECOND BRUSHES, A THIRD BRUSH, A ROTATING COMMUTATOR ELEMENT FOR ALTERNATELY CONNECTING SAID FIRST AND SECOND BRUSHES TO SAID THIRD BRUSH, SAID ROTATING COMMUTATOR ELEMENT BEING MOUNTED ON A COMMON SHAFT WITH SAID ROTOR, MEANS FOR CONNECTING SAID THIRD BRUSH TO A FIRST SIDE OF AN ALTERNATING CURRENT POWER SOURCE, FIRST AND SECOND UNIDIRECTIONAL SEMICONDUCTOR DEVICES, EACH OF SAID DEVICES HAVING A CATHODE ELECTRODE AND ANODE ELECTRODE, MEANS FOR CONNECTING SAID ANODE ELECTRODE OF SAID FIRST SEMICONDUCTOR DEVICE TO SAID FIRST BRUSH AND SAID CATHODE ELECTRODE OF SAID FIRST SEMICONDUCTOR DEVICE TO A FIRST SIDE OF SAID FIELD COIL, MEANS FOR CONNECTING SAID CATHODE ELECTRODE OF SAID SECOND SEMICONDUCTOR DEVICE TO SAID SECOND BRUSH AND SAID ANODE ELECTRODE OF SAID SECOND SEMICONDUCTOR DEVICE TO SAID FIRST SIDE OF SAID FIELD COIL; AND MEANS FOR CONNECTING A SECOND SIDE OF SAID FIELD COIL TO A SECOND SIDE OF SAID ALTERNATING CURRENT POWER SOURCE.
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) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |