US3143694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor controlling apparatus
Assignee: Weltronic Co
•
Filing: 1957-09-16
•
Granted: 1964-08-04
•
Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Wilbert A Chiasson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:03
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/26; H02P1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A CONTROL CIRCUIT FOR SUPPLYING POWER TO A LOAD DEVICE FROM A THREE-PHASE POWER LINE, SAID LOAD DEVICE HAVING A PLURALITY OF INPUT TERMINALS, THE COMBINATION WHICH COMPRISES TWO BANKS OF IGNITRON TUBES CONNECTED BETWEEN SAID LINE AND SAID INPUT TERMINALS TO PROVIDE GOING AND RETURN CURRENT PATHS FOR LOAD CURRENT, ADJUSTABLE PHASING MEANS CONNECTED IN CIRCUIT WITH THE IGNITOR ELECTRODES OF THE NIGITRONS IN ONE OF SAID BANKS FOR INITIATING THE CONDUCTION PERIODS OF SUCH IGNITRONS IN PREDETERMINED PHASE RELATION TO THE POWER-LINE VOLTAGE, AND CHARGE-RESPONSIVE MEANS CONNECTED IN CIRCUIT RESPECTIVELY BETWEEN SAID INPUT TERMINALS AND THE IGNITOR ELECTRODES OF THE IGNITRONS IN SAID OTHER BANK OPERATIVE TO INITIATE CONDUCTION
Claim 2
Dependent Claim
112 words
IN A CONTROL CIRCUIT FOR SUPPLYING POWER TO A LOAD DEVICE FROM A THREE-PHASE POWER LINE, SAID LOAD DEVICE HAVING A PLURALITY OF INPUT TERMINALS, THE COMBINATION WHICH COMPRISES TWO BANKS OF IGNITRON TUBES CONNECTED BETWEEN SAID LINE AND SAID INPUT TERMINALS TO PROVIDE GOING AND RETURN CURRENT PATHS FOR LOAD CURRENT, ADJUSTABLE PHASING MEANS CONNECTED IN CIRCUIT WITH THE IGNITOR ELECTRODES OF THE NIGITRONS IN ONE OF SAID BANKS FOR INITIATING THE CONDUCTION PERIODS OF SUCH IGNITRONS IN PREDETERMINED PHASE RELATION TO THE POWER-LINE VOLTAGE, AND CHARGE-RESPONSIVE MEANS CONNECTED IN CIRCUIT RESPECTIVELY BETWEEN SAID INPUT TERMINALS AND THE IGNITOR ELECTRODES OF THE IGNITRONS IN SAID OTHER BANK OPERATIVE TO INITIATE CONDUCTION
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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |