Patent US3132331A successfully refreshed from Google Patents.
US3132331A
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Fluid level signal system
Assignee: King Seeley Thermos Co
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Filing: 1956-10-10
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Granted: 1964-05-05
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Expires: 1976-10-10
Abstract
No abstract record available.
Inventors
- 👤 Boddy Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:34
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/161; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7834; Y10T137/8158; Y10T137/8342
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A SIGNAL SYSTEM FOR RESPONDING TO A CRITICAL LIQUID LEVEL CONDITION, COMPRISING A FLUID PRESSURE RESPONSIVE CONTROL ELEMENT, MEANS FOR APPLYING A FLUID PRESSURE DIFFERENTIAL TO SAID CONTROL ELEMENT, MEANS INCLUDING A FLUID PASSAGE OPENED AND CLOSED BY CHANGES IN LIQUID LEVEL FOR SO MODIFYING SAID FLUID PRESSURE DIFFERENTIAL AS TO ACTUATE SAID CONTROL ELEMENT, AND MEANS CONTROLLED BY SAID CONTROL ELEMENT FOR LIMITING SAID FLUID PRESSURE DIFFERENTIAL AND MAINTAINING SAID FLUID PRESSURE DIFFERENTIAL AT A PREDETERMINED VALUE.
Claim 2
Dependent Claim
78 words
A SIGNAL SYSTEM FOR RESPONDING TO A CRITICAL LIQUID LEVEL CONDITION, COMPRISING A FLUID PRESSURE RESPONSIVE CONTROL ELEMENT, MEANS FOR APPLYING A FLUID PRESSURE DIFFERENTIAL TO SAID CONTROL ELEMENT, MEANS INCLUDING A FLUID PASSAGE OPENED AND CLOSED BY CHANGES IN LIQUID LEVEL FOR SO MODIFYING SAID FLUID PRESSURE DIFFERENTIAL AS TO ACTUATE SAID CONTROL ELEMENT, AND MEANS CONTROLLED BY SAID CONTROL ELEMENT FOR LIMITING SAID FLUID PRESSURE DIFFERENTIAL AND MAINTAINING SAID FLUID PRESSURE DIFFERENTIAL AT A PREDETERMINED VALUE.
Claim 3
Dependent Claim
103 words
A SWITCH FOR USE IN A SIGNAL SYSTEM ADAPTED TO RESPOND TO THE EXISTANCE OF A CRITICAL LIQUID LEVEL CONDITIONS, SAID SWITCH COMPRISING A HOUSING, A FIRST ELECTRIC CONTACT CARRIED BY SAID HOUSING, DIAPHRAGM MEANS IN SAID HOUSING DIVIDING SAID HOUSING INTO FIRST AND SECOND CHAMBERS, VALVE MEANS INTERCONNECTING SAID CHAMBERS AND MOVABLE RELATIVE TO SAID DIAPHRAGM, A SECOND ELECTRICAL CONTACT ADAPTED TO MAKE AND BREAK WITH SAID FIRST CONTACT AND ACTUATE BY SAID VALVE MENS, MEANS FOR LIMITING THE MOVEMENT OF SAID VALVE MEANS RELATIVE TO SAID DIAPHRAGM MEANS, AND MEANS FOR CREATING AND MAINTAINING A PREDETERMINED PRESSURE DIFFERENTIAL BETWEEN SAID CHAMBERS.
Claim 4
Dependent Claim
103 words
A SWITCH FOR USE IN A SIGNAL SYSTEM ADAPTED TO RESPOND TO THE EXISTANCE OF A CRITICAL LIQUID LEVEL CONDITIONS, SAID SWITCH COMPRISING A HOUSING, A FIRST ELECTRIC CONTACT CARRIED BY SAID HOUSING, DIAPHRAGM MEANS IN SAID HOUSING DIVIDING SAID HOUSING INTO FIRST AND SECOND CHAMBERS, VALVE MEANS INTERCONNECTING SAID CHAMBERS AND MOVABLE RELATIVE TO SAID DIAPHRAGM, A SECOND ELECTRICAL CONTACT ADAPTED TO MAKE AND BREAK WITH SAID FIRST CONTACT AND ACTUATE BY SAID VALVE MENS, MEANS FOR LIMITING THE MOVEMENT OF SAID VALVE MEANS RELATIVE TO SAID DIAPHRAGM MEANS, AND MEANS FOR CREATING AND MAINTAINING A PREDETERMINED PRESSURE DIFFERENTIAL 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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |