US3280375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tripping device
Assignee: ABB Inc USA
•
Filing: 1963-01-17
•
Granted: 1966-10-18
•
Expires: 1983-01-17
Abstract
No abstract record available.
Inventors
- 👤 Jensen Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:14
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/24; H01H71/2472; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/14; H01H71/2454
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN COMBINATION; A CIRCUIT BREAKER HAVING A CURRENT RESPONSIVE TRIP MEANS AND A CURRENT TRANSFORMER; SAID CURRENT TRANSFORMER COMPRISING A MAGNETIC CORE FORMING A PORTION OF A CLOSED MAGNETIC CIRCUIT, AN ARMATURE CORE PORTION MOVABLE WITH RESPECT TO SAID MAGNETIC CORE AND BEING MOVABLE TO A POSITION WITH RESPECT TO SAID MAGNETIC CORE TO COMPLETE SAID CLOSED MAGNETIC CIRCUIT; AND A PRIMARY AND A SECONDARY WINDING ON SAID CLOSED MAGNETIC CORE; SAID PRIMARY WINDING BEING CONNECTED IN SERIES WITH SAID CIRCUIT BREAKER; SAID MAGNETIC CORE POR-
Claim 2
Dependent Claim
86 words
IN COMBINATION; A CIRCUIT BREAKER HAVING A CURRENT RESPONSIVE TRIP MEANS AND A CURRENT TRANSFORMER; SAID CURRENT TRANSFORMER COMPRISING A MAGNETIC CORE FORMING A PORTION OF A CLOSED MAGNETIC CIRCUIT, AN ARMATURE CORE PORTION MOVABLE WITH RESPECT TO SAID MAGNETIC CORE AND BEING MOVABLE TO A POSITION WITH RESPECT TO SAID MAGNETIC CORE TO COMPLETE SAID CLOSED MAGNETIC CIRCUIT; AND A PRIMARY AND A SECONDARY WINDING ON SAID CLOSED MAGNETIC CORE; SAID PRIMARY WINDING BEING CONNECTED IN SERIES WITH SAID CIRCUIT BREAKER; SAID MAGNETIC CORE POR-
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |