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US3437770A
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Automatic underwater "and" gate switch
Assignee: Individual
•
Filing: 1966-10-12
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Granted: 1969-04-08
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Expires: 1986-10-12
Abstract
No abstract record available.
Inventors
- 👤 Edward Piernik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:28
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/02; H01H29/00; H01H29/20; Y; Y10; Y10S; Y10S200/00; Y10S200/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
AN AND GATE SWITCH UNIT FOR OPERATION IN AN IMMERSIBLE FLUID COMPRISING: A MASS OF ELECTRICALLY NON-CONDUCTIVE MATERIAL FORMING THE BODY OF SAID UNIT, FIRST AND SECOND GRAVITY OPERABLE SWITCHES CARRIED BY SAID BODY AND ELECTRICALLY CONNECTED IN SERIES RELATIONSHIP, AND MEANS INCLUDED IN SAID SECOND SWITCH RESPONSIVELY OPERABLE TO FLUID PRESSURE TO MAINTAIN SAID SECOND SWITCH IN CLOSED CIRCUIT CONDITION WHEN SAID UNIT IS IMMERSED IN FLUID IN A PREDETERMINED POSITION, SAID SWITCHES BEING ORIENTED ON SAID BODY IN SUCH MANNER THAT GRAVITY WILL RETAIN AT LEAST ONE OF SAID SWITCHES IN AN OPEN CONDITION FOR ANY POSITION OF SAID UNIT WHEN NOT IMMERSED IN A FLUID.
Claim 2
Dependent Claim
108 words
AN AND GATE SWITCH UNIT FOR OPERATION IN AN IMMERSIBLE FLUID COMPRISING: A MASS OF ELECTRICALLY NON-CONDUCTIVE MATERIAL FORMING THE BODY OF SAID UNIT, FIRST AND SECOND GRAVITY OPERABLE SWITCHES CARRIED BY SAID BODY AND ELECTRICALLY CONNECTED IN SERIES RELATIONSHIP, AND MEANS INCLUDED IN SAID SECOND SWITCH RESPONSIVELY OPERABLE TO FLUID PRESSURE TO MAINTAIN SAID SECOND SWITCH IN CLOSED CIRCUIT CONDITION WHEN SAID UNIT IS IMMERSED IN FLUID IN A PREDETERMINED POSITION, SAID SWITCHES BEING ORIENTED ON SAID BODY IN SUCH MANNER THAT GRAVITY WILL RETAIN AT LEAST ONE OF SAID SWITCHES IN AN OPEN CONDITION FOR ANY POSITION OF SAID UNIT WHEN NOT IMMERSED IN A FLUID.
References Cited (Backward Citations)
US1925633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |