US3132515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid gauge system
Assignee: Simmonds Precision Products Inc
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Filing: 1962-11-14
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Granted: 1964-05-12
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Expires: 1982-11-14
Abstract
No abstract record available.
Inventors
- 👤 Urban Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:27
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/241; G01F23/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
IN A SYSTEM OF GAUGING THE LEVEL OF FLUID IN A CONTAINER THE CONDUCTIVITY OF SAID FLUID VARYING WITH TEMPERATURE, A SOURCE OF ELECTRICAL SUPPLY, AN ELECTRICAL BRIDGE CIRCUIT CONNECTED TO SAID SOURCE OF SUPPLY AND HAVING AT LEAST ONE FIRST SENSING DEVICE CONNECTED IN ONE ARM OF THE BRIDGE AND LOCATED IN SID CONTAINER AT A PREDETERMINED LEVEL, SAID FIRST DEVICE EXHIBITING A CHANGE IN RESISTANCE WITH A CHANGE IN THE PROXIMITY THERETO OF SAID FLUID, SAID RESISTANCE CHANGE BEING GREATER THE LOWER IS THE TEMPERATURE OF SAID FLUID, AT LEAST ONE SECOND SENSING DEVICE CONNECTED IN ANOTHER ARM OF THE BRIDGE CIRCUIT AND LOCATED AT SAID PREDETERMINED LEVEL, SAID SECOND DEVICE EXHIBITING A CHANGE IN RESISTANCE WITH A CHANGE IN THE PROXIMITY THERETO OF SAID FLUID, SAID RESISTANCE CHANGE BEING GREATER THE HIGHER THE TEMPERATURE F SAID FLUID, AND AN INDICATOR MEANS CONNECTED IN SAID BRIDGE CIRCUIT FOR INDICATING BALANCE AND UNBALANCE CONDITIONS IN SAID BRIDGE, SAID CONDITIONS BEING DEPENDENT ON THE RESISTANCE EXHIBITED BY SAID SENSING DEVICES.
Claim 2
Dependent Claim
170 words
IN A SYSTEM OF GAUGING THE LEVEL OF FLUID IN A CONTAINER THE CONDUCTIVITY OF SAID FLUID VARYING WITH TEMPERATURE, A SOURCE OF ELECTRICAL SUPPLY, AN ELECTRICAL BRIDGE CIRCUIT CONNECTED TO SAID SOURCE OF SUPPLY AND HAVING AT LEAST ONE FIRST SENSING DEVICE CONNECTED IN ONE ARM OF THE BRIDGE AND LOCATED IN SID CONTAINER AT A PREDETERMINED LEVEL, SAID FIRST DEVICE EXHIBITING A CHANGE IN RESISTANCE WITH A CHANGE IN THE PROXIMITY THERETO OF SAID FLUID, SAID RESISTANCE CHANGE BEING GREATER THE LOWER IS THE TEMPERATURE OF SAID FLUID, AT LEAST ONE SECOND SENSING DEVICE CONNECTED IN ANOTHER ARM OF THE BRIDGE CIRCUIT AND LOCATED AT SAID PREDETERMINED LEVEL, SAID SECOND DEVICE EXHIBITING A CHANGE IN RESISTANCE WITH A CHANGE IN THE PROXIMITY THERETO OF SAID FLUID, SAID RESISTANCE CHANGE BEING GREATER THE HIGHER THE TEMPERATURE F SAID FLUID, AND AN INDICATOR MEANS CONNECTED IN SAID BRIDGE CIRCUIT FOR INDICATING BALANCE AND UNBALANCE CONDITIONS IN SAID BRIDGE, SAID CONDITIONS BEING DEPENDENT ON THE RESISTANCE EXHIBITED BY SAID SENSING DEVICES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |