US3181048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor drive system for a control circuit
Assignee: Individual
•
Filing: 1961-06-26
•
Granted: 1965-04-27
•
Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 John A Ficek
- 👤 Francis A Wissel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:08
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/125; G05D3/127
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A MOTOR DRIVE SYSTEM OPERATING A CONTROL CIRCUIT, A POWER SOURCE, A MOTOR HAVING A SERIES FIELD WINDING AND A ROTOR, A MOTOR SWITCH AND A CONTROL CIRCUIT SWITCH CONNECTED IN SERIES WITH SAID POWER SOURCE, SAID ROTOR AND SAID FIELD WINDING, FIRST MEANS CONNECTED TO SAID ROTOR FOR INTERMITTENTLY OPENING SAID MOTOR SWITCH, MEANS SHUNTED ACROSS SAID FIELD WINING FOR USING THE STORED ENERGY IN SAID FIELD WINDING TO DRIVE SAID ROTOR DURING PERIODS OF INTERRUPTION OF SAID POWER SOURCE, AND SECOND MEANS CONNECTED TO SAID ROTOR FOR OPENING SAID CONTROL CIRCUIT SWITCH AFTER SAID MOTOR SWITCH HAS BEEN ACTUATED A PREDETERMINED NUMBER OF TIMES AND OPENING ONLY WHEN SAID MOTOR SWITCH IS IN THE OPEN POSITION.
Claim 2
Dependent Claim
119 words
IN A MOTOR DRIVE SYSTEM OPERATING A CONTROL CIRCUIT, A POWER SOURCE, A MOTOR HAVING A SERIES FIELD WINDING AND A ROTOR, A MOTOR SWITCH AND A CONTROL CIRCUIT SWITCH CONNECTED IN SERIES WITH SAID POWER SOURCE, SAID ROTOR AND SAID FIELD WINDING, FIRST MEANS CONNECTED TO SAID ROTOR FOR INTERMITTENTLY OPENING SAID MOTOR SWITCH, MEANS SHUNTED ACROSS SAID FIELD WINING FOR USING THE STORED ENERGY IN SAID FIELD WINDING TO DRIVE SAID ROTOR DURING PERIODS OF INTERRUPTION OF SAID POWER SOURCE, AND SECOND MEANS CONNECTED TO SAID ROTOR FOR OPENING SAID CONTROL CIRCUIT SWITCH AFTER SAID MOTOR SWITCH HAS BEEN ACTUATED A PREDETERMINED NUMBER OF TIMES AND OPENING ONLY WHEN SAID MOTOR SWITCH IS IN THE OPEN POSITION.
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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |