US3172020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current-controlling circuit for directcurrent electromagnetic devices
Assignee: Automatic Switch Co
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Filing: 1962-02-12
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Granted: 1965-03-02
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Expires: 1982-02-12
Abstract
No abstract record available.
Inventors
- 👤 Frank P Spinelli
- 👤 Frank S Nolt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:05
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/02; H01H47/04; H01H47/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
IN AN ELECTRIC CIRCUIT FOR CONTROLLING THE OPERATION OF AN ELECTROMAGNETIC DEVICE COMPRISING A MAIN WINDING AND AN ARMATURE FORMING PART OF THE FLUX PATH AND MOVABLE, UPON MAGNETIZATION OF THE DEVICE, FROM ONE POSITION TO ANOTHER, THE RELUCTANCE OF THE FLUX PATH BEING ALTERED DURING THE COURSE OF SAID MOVEMENT: A SOURCE OF CONSTANT D.C. VOLTAGE, A RESISTOR CONNECTED IN SERIES WITH SAID MAIN WINDING ACROSS SAID VOLTAGE SOURCE, A CONTROL WINDING INDUCTIVELY COUPLED WITH SAID MAIN WINDING, A CURRENT BEING INDUCED IN SAID CONTROL WINDING UPON CONNECTION OF SAID SOURCE TO SAID MAIN WINDING, A SHORT-CIRCUITING BY-PASS FOR SAID RESISTOR, AND MEANS IN SAID BY-PASS RESPONSIVE TO FLOW OF SAID INDUCED CURRENT IN SAID CONTROL WINDING FOR RENDERING SAID BY-PASS CONDUCTIVE THEREBY SHORT-CIRCUITING SAID RESISTOR AND ALLOWING INCREASED CURRENT FROM SAID SOURCE TO FLOW THROUGH SAID MAIN WINDING, SAID MEANS BEING ADAPTED TO RENDER SAID BY-PASS NONCONDUCTIVE AFTER SAID ARMATURE COMES TO REST IN ORDER TO PERMIT ONLY A REDUCED CURRENT TO FLOW FROM SAID SOURCE THROUGH SAID MAIN WINDING.
Claim 2
Dependent Claim
172 words
IN AN ELECTRIC CIRCUIT FOR CONTROLLING THE OPERATION OF AN ELECTROMAGNETIC DEVICE COMPRISING A MAIN WINDING AND AN ARMATURE FORMING PART OF THE FLUX PATH AND MOVABLE, UPON MAGNETIZATION OF THE DEVICE, FROM ONE POSITION TO ANOTHER, THE RELUCTANCE OF THE FLUX PATH BEING ALTERED DURING THE COURSE OF SAID MOVEMENT: A SOURCE OF CONSTANT D.C. VOLTAGE, A RESISTOR CONNECTED IN SERIES WITH SAID MAIN WINDING ACROSS SAID VOLTAGE SOURCE, A CONTROL WINDING INDUCTIVELY COUPLED WITH SAID MAIN WINDING, A CURRENT BEING INDUCED IN SAID CONTROL WINDING UPON CONNECTION OF SAID SOURCE TO SAID MAIN WINDING, A SHORT-CIRCUITING BY-PASS FOR SAID RESISTOR, AND MEANS IN SAID BY-PASS RESPONSIVE TO FLOW OF SAID INDUCED CURRENT IN SAID CONTROL WINDING FOR RENDERING SAID BY-PASS CONDUCTIVE THEREBY SHORT-CIRCUITING SAID RESISTOR AND ALLOWING INCREASED CURRENT FROM SAID SOURCE TO FLOW THROUGH SAID MAIN WINDING, SAID MEANS BEING ADAPTED TO RENDER SAID BY-PASS NONCONDUCTIVE AFTER SAID ARMATURE COMES TO REST IN ORDER TO PERMIT ONLY A REDUCED CURRENT TO FLOW FROM SAID SOURCE THROUGH SAID MAIN WINDING.
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |