Patent US3104384A successfully refreshed from Google Patents.
US3104384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm system
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1959-06-04
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Granted: 1963-09-17
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Expires: 1979-06-04
Abstract
No abstract record available.
Inventors
- 👤 Matthew W Slate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:03
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/06; Y; Y10; Y10T; Y10T74/00; Y10T74/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE COMBINATION COMPRISING A PERMANENTLY MAGNETIZED MAGNETIC CORE, A MOVABLE ARMATURE NORMALLY ASSOCIATED WITH SAID CORE IN A POSITION SUBSTANTIALLY CLOSING THE MAGNETIC CIRCUIT OF SAID CORE AND HELD THEREBY IN SAID POSITION, SIGNALLING MEANS CONNECTED TO SAID ARMATURE, SAID SIGNALLING MEANS BEING OPERABLE BY MOVEMENT OF THE ARMATURE FROM SAID POSITION IN A DIRECTION TO OPEN SAID MAGNETIC CIRCUIT, MEANS BIASING SAID ARMATURE IN OPPOSITION TO THE HOLDING ACTION THEREON OF SAID MAGNETIC CORE, A WINDING ASSOCIATED WITH SAID CORE AND ADAPTED TO BE ENERGIZED TO PRODUCE A FIELD NEUTRALIZING THE PERMANENT FIELD THEREOF, THEREBY TO EFFECT RELEASE OF THE ARMATURE AND OPERATION OF SAID SIGNALLING MEANS, A SECOND PERMANENTLY MAGNETIZED MAGNETIC CORE, A MOVABLE ARMATURE NORMALLY ASSOCIATED WITH SAID SECOND CORE IN A POSITION SUBSTAN-
Claim 2
Dependent Claim
127 words
THE COMBINATION COMPRISING A PERMANENTLY MAGNETIZED MAGNETIC CORE, A MOVABLE ARMATURE NORMALLY ASSOCIATED WITH SAID CORE IN A POSITION SUBSTANTIALLY CLOSING THE MAGNETIC CIRCUIT OF SAID CORE AND HELD THEREBY IN SAID POSITION, SIGNALLING MEANS CONNECTED TO SAID ARMATURE, SAID SIGNALLING MEANS BEING OPERABLE BY MOVEMENT OF THE ARMATURE FROM SAID POSITION IN A DIRECTION TO OPEN SAID MAGNETIC CIRCUIT, MEANS BIASING SAID ARMATURE IN OPPOSITION TO THE HOLDING ACTION THEREON OF SAID MAGNETIC CORE, A WINDING ASSOCIATED WITH SAID CORE AND ADAPTED TO BE ENERGIZED TO PRODUCE A FIELD NEUTRALIZING THE PERMANENT FIELD THEREOF, THEREBY TO EFFECT RELEASE OF THE ARMATURE AND OPERATION OF SAID SIGNALLING MEANS, A SECOND PERMANENTLY MAGNETIZED MAGNETIC CORE, A MOVABLE ARMATURE NORMALLY ASSOCIATED WITH SAID SECOND CORE IN A POSITION SUBSTAN-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |