Patent US3250868A successfully refreshed from Google Patents.
US3250868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercury time delay switches
Assignee: Elco Corp
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Filing: 1963-04-02
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Granted: 1966-05-10
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Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Sidney V Worth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:23
CPC Classifications
H; H01; H01H; H01H29/00; H01H29/02; H01H29/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AN ELECTRICAL SWITCH COMPRISING A SYMMETRICAL PEAR SHAPED ANNULAR HOLLOW HOUSING, SAID HOUSING INCLUDING TWO LEGS FORMED AT AN ANGLE WITH RESPECT TO EACH OTHER, A CONDUCTIVE LIQUID FILLING A PORTION OF SAID HOUSING INTO DIVIDING THE REMAINDER OF THE INTERIOR OF SAID HOUSING INTO FIRST AND SECOND SPACED CHAMBERS ON OPPOSITE SIDES OF SAID LIQUID, A NON-CONDUCTIVE FLUID IN SAID CHAMBERS, A PAIR OF SPACED CONNECTORS IN ELECTRICAL CONDUCTIVE RELATION WITH THE INTERIOR OF SAID HOUSING, EACH OF SAID CONNECTORS BEING PLACED IN A SEPARATE LEG OF SAID HOUSING AND EQUALLY SPACED FROM THE APEX OF SAID ANGLE, SAID LIQUID BEING OF SUFFICIENT VOLUME TO FILL THE SPACE IN SAID HOUSING BETWEEN SAID CONNECTORS, SAID CHAMBER BEING A FLUID COMMUNICTION, AND TIME DELAY MEANS FOR CONTROLLING FLUID COMMUNICATION BETWEEN SAID CHAMBERS.
Claim 2
Dependent Claim
132 words
AN ELECTRICAL SWITCH COMPRISING A SYMMETRICAL PEAR SHAPED ANNULAR HOLLOW HOUSING, SAID HOUSING INCLUDING TWO LEGS FORMED AT AN ANGLE WITH RESPECT TO EACH OTHER, A CONDUCTIVE LIQUID FILLING A PORTION OF SAID HOUSING INTO DIVIDING THE REMAINDER OF THE INTERIOR OF SAID HOUSING INTO FIRST AND SECOND SPACED CHAMBERS ON OPPOSITE SIDES OF SAID LIQUID, A NON-CONDUCTIVE FLUID IN SAID CHAMBERS, A PAIR OF SPACED CONNECTORS IN ELECTRICAL CONDUCTIVE RELATION WITH THE INTERIOR OF SAID HOUSING, EACH OF SAID CONNECTORS BEING PLACED IN A SEPARATE LEG OF SAID HOUSING AND EQUALLY SPACED FROM THE APEX OF SAID ANGLE, SAID LIQUID BEING OF SUFFICIENT VOLUME TO FILL THE SPACE IN SAID HOUSING BETWEEN SAID CONNECTORS, SAID CHAMBER BEING A FLUID COMMUNICTION, AND TIME DELAY MEANS FOR CONTROLLING FLUID COMMUNICATION BETWEEN SAID CHAMBERS.
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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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |