Patent US3260820A successfully refreshed from Google Patents.
US3260820A
Expired / Lapsed
US
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Magnetic flow switch
Assignee: OBrien Corp
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Filing: 1964-09-08
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Granted: 1966-07-12
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward J O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:09
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/40; H01H35/405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN COMBINATION, AN EXPLOSION-PROOF FLOW SWITCH COMPRISING A COMPACT CASING, SUPPORTING MEANS CONNECTED TO SAID CASING, A MAGNETIC REED SWITCH SEALED WITHIN SAID CASING, ELECTRICAL WIRES OPERATIVELY CONNECTED TO SAID MAGNETIC REED SWITCH AND EXTENDING FROM SAID CASING, A FLEXIBLE HINGE MEMBER CONNECTED TO SAID CASING AND EXTENDING THEREFROM, A MATERIALS ENGAGING PADDLE CONNECTED TO SIAD HINGE MEMBER AND EXTENDING THEREFROM, A PERMANENT MAMGNET MOUNTED ON SAID PADDLE FOR MOVEMENT THEREWITH ADAPTED TO MOVE THE MAGNETIC REED SWTICH IN ONE POSITION THEREOF, AND A MAGNET HOLDER REMOVABLY AND ADJUSTABLE TRAPPING SAID PERMANENT MAGNET AGAINST SAID PADDLE FOR QUICK REMOVAL AND ADJUSTMENT, THE MAGNET HOLDER BEING ADJUSTABLE VERTICALLY ON THE PADDLE TO VARY THE SWITCHING MOMENT.
Claim 2
Dependent Claim
115 words
IN COMBINATION, AN EXPLOSION-PROOF FLOW SWITCH COMPRISING A COMPACT CASING, SUPPORTING MEANS CONNECTED TO SAID CASING, A MAGNETIC REED SWITCH SEALED WITHIN SAID CASING, ELECTRICAL WIRES OPERATIVELY CONNECTED TO SAID MAGNETIC REED SWITCH AND EXTENDING FROM SAID CASING, A FLEXIBLE HINGE MEMBER CONNECTED TO SAID CASING AND EXTENDING THEREFROM, A MATERIALS ENGAGING PADDLE CONNECTED TO SIAD HINGE MEMBER AND EXTENDING THEREFROM, A PERMANENT MAMGNET MOUNTED ON SAID PADDLE FOR MOVEMENT THEREWITH ADAPTED TO MOVE THE MAGNETIC REED SWTICH IN ONE POSITION THEREOF, AND A MAGNET HOLDER REMOVABLY AND ADJUSTABLE TRAPPING SAID PERMANENT MAGNET AGAINST SAID PADDLE FOR QUICK REMOVAL AND ADJUSTMENT, THE MAGNET HOLDER BEING ADJUSTABLE VERTICALLY ON THE PADDLE TO VARY THE SWITCHING MOMENT.
References Cited (Backward Citations)
US1830673A
Cited
US2307304A
Cited
US2600011A
Cited
US2600309A
Cited
US2628296A
Cited
US3104289A
Cited
US3148254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |