US3123786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load protector comprising an air gap shunted
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:45
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
AN ELECTRICAL LOAD PROTECTOR COMPRISING A FIRST CORE HAVING A SUBSTANTIALLY CLOSED LOOP OF FERROMAGNETIC MATERIAL DEFINING A WINDOW, A PRIMARY COIL COMPRISING FIRST AND SECOND WINDINGS, SAID FIRST AND SECOND PRIMARY WINDINGS BEING CONNECTED IN SERIES AND SO SPACED APART ON SAID FIRST CORE AS TO PRODUCE WITHIN SAID WINDOW A REGION OF SUBSTANTIALLY ZERO MAGNETIC FIELD, SAID CORE HAVING AN AIR GAP, A SECOND CORE OF FERROMAGNETIC MATERIAL, SAID SECOND CORE BEING C-SHAPED AND HAVING FIRST AND SECOND ENDS, THE ENDS OF SAID SECOND CORE BEING, RESPECTIVELY, IN GOOD MAGNETIC CONTACT WITH SAID FIRST CORE ON OPPOSITE SIDES OF SAID AIR GAP, A SECONDARY WINDING DISPOSED ON SAID SECOND CORE, SAID SECONDARY WINDING BEING POSITIONED SUBSTANTIALLY IN SAID REGION OF ZERO FIELD, AND SAID FIRST CORE HAVING A SATURATION INDUCTION HIGHER THAN THE SATURATION INDUCTION OF SAID SECOND CORE.
Claim 2
Dependent Claim
141 words
AN ELECTRICAL LOAD PROTECTOR COMPRISING A FIRST CORE HAVING A SUBSTANTIALLY CLOSED LOOP OF FERROMAGNETIC MATERIAL DEFINING A WINDOW, A PRIMARY COIL COMPRISING FIRST AND SECOND WINDINGS, SAID FIRST AND SECOND PRIMARY WINDINGS BEING CONNECTED IN SERIES AND SO SPACED APART ON SAID FIRST CORE AS TO PRODUCE WITHIN SAID WINDOW A REGION OF SUBSTANTIALLY ZERO MAGNETIC FIELD, SAID CORE HAVING AN AIR GAP, A SECOND CORE OF FERROMAGNETIC MATERIAL, SAID SECOND CORE BEING C-SHAPED AND HAVING FIRST AND SECOND ENDS, THE ENDS OF SAID SECOND CORE BEING, RESPECTIVELY, IN GOOD MAGNETIC CONTACT WITH SAID FIRST CORE ON OPPOSITE SIDES OF SAID AIR GAP, A SECONDARY WINDING DISPOSED ON SAID SECOND CORE, SAID SECONDARY WINDING BEING POSITIONED SUBSTANTIALLY IN SAID REGION OF ZERO FIELD, AND SAID FIRST CORE HAVING A SATURATION INDUCTION HIGHER THAN THE SATURATION INDUCTION OF SAID SECOND CORE.
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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |