US3354367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase drive system including a shift register
Assignee: Digital Equipment Corp
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Filing: 1965-01-12
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Granted: 1967-11-21
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Expires: 1985-01-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Stockebrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:31
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/14; H02P8/20; G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A POLYPHASE POWER SOURCE FOR DRIVING AN ALTERNATING CURRENT MOTOR COMPRISING A RECIRCULATING SHIFT REGISTER HAVING A PLURALITY OF ELECTRICAL STORAGE ELEMENTS, THE NUMBER OF SAID ELEMENTS CORRESPONDING TO THE NUMBER OF PHASE WINDINGS IN SAID MOTOR, EACH OF SAID ELEMENTS PRODUCING AN OUTPUT SIGNAL HAVING EITHER ONE OF TWO DETERMINED VALUES, MEANS DEFINING A DIRECT CURRENT PATH FOR ELECTRICALLY CONNECTING THE OUTPUTS SIGNALS FROM SAID ELEMENTS TO SAID MOTOR, AND MEANS FOR SUPPLYING SUCCESSIVE CLOCK SIGNALS TO SAID SHIFT REGISTER, THE ELEMENTS OF SAID SHIFT REGISTER BEING INTERCONNECTED SUCH THAT UPON APPLICATION OF SAID CLOCK SIGNALS SAID ELEMENTS PRODUCE SIGNALS HAVING A DETERMINED PHASE RELATIONSHIP WITH ONE ANOTHER AND UPON CESSATION OF SAID CLOCK SIGNALS SAID ELEMENTS PRODUCE CONSTANT D.C. SIGNALS.
Claim 2
Dependent Claim
122 words
A POLYPHASE POWER SOURCE FOR DRIVING AN ALTERNATING CURRENT MOTOR COMPRISING A RECIRCULATING SHIFT REGISTER HAVING A PLURALITY OF ELECTRICAL STORAGE ELEMENTS, THE NUMBER OF SAID ELEMENTS CORRESPONDING TO THE NUMBER OF PHASE WINDINGS IN SAID MOTOR, EACH OF SAID ELEMENTS PRODUCING AN OUTPUT SIGNAL HAVING EITHER ONE OF TWO DETERMINED VALUES, MEANS DEFINING A DIRECT CURRENT PATH FOR ELECTRICALLY CONNECTING THE OUTPUTS SIGNALS FROM SAID ELEMENTS TO SAID MOTOR, AND MEANS FOR SUPPLYING SUCCESSIVE CLOCK SIGNALS TO SAID SHIFT REGISTER, THE ELEMENTS OF SAID SHIFT REGISTER BEING INTERCONNECTED SUCH THAT UPON APPLICATION OF SAID CLOCK SIGNALS SAID ELEMENTS PRODUCE SIGNALS HAVING A DETERMINED PHASE RELATIONSHIP WITH ONE ANOTHER AND UPON CESSATION OF SAID CLOCK SIGNALS SAID ELEMENTS PRODUCE CONSTANT D.C. SIGNALS.
References Cited (Backward Citations)
US3297927A
Cited
US3293459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |