US3444447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-phase step motor control circuits including means for supplementing the normal energization of the windings
Assignee: MESUR MATIC ELECTRONICS CORP
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Filing: 1966-09-22
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Granted: 1969-05-13
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Expires: 1986-09-22
Abstract
No abstract record available.
Inventors
- 👤 Harold R Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:32
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/12; H02P8/14; H02P8/16; H02P8/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
CONTROL CIRCUITRY FOR EXCITING THE FIELD WINDINGS OF A MULTI-PHASE STEP MOTOR, COMPRISING A DRIVER CIRCUIT FOR APPLYING ENERGIZING CURRENTS TO SAID FIELD WINDINGS IN A PREDETERMINED SEQUENTIAL SWITCHING FORMAT, SO THAT EACH FIELD WINDING IS ENERGIZED DURING CERTAIN PRESELECTED TIME INCREMENTS OF SAID SWITCHING FORMAT AND DE-ENERGIZED DURING CERTAIN OTHER PRESELECTED TIME INCREMENTS OF SAID SWITCHING FORMAT; A POWER SUPPLY FOR SAID DRIVER CIRCUIT; SAID DRIVER CIRCUIT INCLUDING A PLURALITY OF SWITCHING CIRCUITS CORRESPONDING IN NUMBER TO THE NUMBER OF STEPPING PHASES TO WHICH SAID MOTOR IS TO BE SUBJECTED DURING ONE COMPLETE PERIOD OF ROTOR ROTATION, EACH OF SAID SWITCHING CIRCUITS INCLUDING MEANS FOR STORING ENERGY FROM SAID POWER SUPPLY DURING TIME INCREMENTS IN WHICH THE ASSOCIATED FIELD WINDING IS DE-ENERGIZED AND FOR SUPPLYING THE STORED ENERGY IN THE FORM OF ADDITIONAL ENERGIZING CURRENT TO SAID ASSOCIATED FIELD WINDING DURING TIME INCREMENTS IN WHICH SAID ASSOCIATED FIELD WINDING IS ENERGIZED.
Claim 2
Dependent Claim
152 words
CONTROL CIRCUITRY FOR EXCITING THE FIELD WINDINGS OF A MULTI-PHASE STEP MOTOR, COMPRISING A DRIVER CIRCUIT FOR APPLYING ENERGIZING CURRENTS TO SAID FIELD WINDINGS IN A PREDETERMINED SEQUENTIAL SWITCHING FORMAT, SO THAT EACH FIELD WINDING IS ENERGIZED DURING CERTAIN PRESELECTED TIME INCREMENTS OF SAID SWITCHING FORMAT AND DE-ENERGIZED DURING CERTAIN OTHER PRESELECTED TIME INCREMENTS OF SAID SWITCHING FORMAT; A POWER SUPPLY FOR SAID DRIVER CIRCUIT; SAID DRIVER CIRCUIT INCLUDING A PLURALITY OF SWITCHING CIRCUITS CORRESPONDING IN NUMBER TO THE NUMBER OF STEPPING PHASES TO WHICH SAID MOTOR IS TO BE SUBJECTED DURING ONE COMPLETE PERIOD OF ROTOR ROTATION, EACH OF SAID SWITCHING CIRCUITS INCLUDING MEANS FOR STORING ENERGY FROM SAID POWER SUPPLY DURING TIME INCREMENTS IN WHICH THE ASSOCIATED FIELD WINDING IS DE-ENERGIZED AND FOR SUPPLYING THE STORED ENERGY IN THE FORM OF ADDITIONAL ENERGIZING CURRENT TO SAID ASSOCIATED FIELD WINDING DURING TIME INCREMENTS IN WHICH SAID ASSOCIATED FIELD WINDING IS ENERGIZED.
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) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |