US3308665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid depth indicator
Assignee: TRANS SONICS Inc
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Filing: 1966-02-18
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Granted: 1967-03-14
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Expires: 1986-02-18
Abstract
No abstract record available.
Inventors
- 👤 Sidney B Williams
- 👤 Vernon C Westcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:52
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G01F23/247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
227 words
A SYSTEM FOR PROVIDING A MULTIPLE DIGIT REPRESENTATION OF THE POSITION OF THE SURFACE OF A LIQUID, SAID SYSTEM COMPRISING (A) A PLURALITY OF STACKS OF IMMERSIBLE THERMOELECTRIC JUNCTIONS, (B) EACH STACK EXTENDING THROUGH A RANGE OF LIQUID LEVEL TO BE MEASURED BY IT, (C) AT LEAST A FIRST STACK HAVING A FIRST PAIR OF TERMINAL MEANS AND AT LEAST TWO JUNCTIONS THAT CAN BE IMMERSED IN SAID LIQUID AND THAT ARE (1) VERTICALLY SPACED APART TO BE SUCCESSIVELY IMMERSED BY A RISING LIQUID LEVEL, (2) ARRANGED IN CIRCUIT BETWEEN SAID FIRST TERMINAL MEANS TO DEVELOP A NET THERMOELECTRIC VOLTAGE THEREBETWEEN WHICH CHANGES BACK AND FORTH BETWEEN AT LEAST FIRST AND SECOND VALUES AS THE LEVEL OF SAID LIQUID RISES OR DESCENDS PAST EACH IMMERSIBLE JUNCTION OF SAID FIRST STACK, (D) AT LEAST A SECOND STACK HAVING A SECOND PAIR OF TERMINAL MEANS AND AT LEAST TWO FURTHER JUNCTIONS, AT LEAST ONE OF WHICH CAN BE IMMERSED IN SAID LIQUID, AND THAT ARE (1) VERTICALLY SPACED APART, (2) ARRANGED IN CIRCUIT BETWEEN SAID SECOND TERMINAL MEANS TO DEVELOP A NET THERMOELECTRIC VOLTAGE THEREBETWEEN WHICH CHANGES BACK AND FORTH BETWEEN AT LEAST TWO DIFFERENT VALUES AS A THE LEVEL OF SAID LIQUID RISES OR DESCENDS PAST EACH IMMERSIBLE JUNCTION OF SAID SECOND STACK, AND (E) OUTPUT MEANS RESPONSIVE TO THE NET THERMOELECTRIC VOLTAGES DEVELOPED BY THE RESPECTIVE STACKS.
Claim 2
Independent Claim
227 words
A SYSTEM FOR PROVIDING A MULTIPLE DIGIT REPRESENTATION OF THE POSITION OF THE SURFACE OF A LIQUID, SAID SYSTEM COMPRISING (A) A PLURALITY OF STACKS OF IMMERSIBLE THERMOELECTRIC JUNCTIONS, (B) EACH STACK EXTENDING THROUGH A RANGE OF LIQUID LEVEL TO BE MEASURED BY IT, (C) AT LEAST A FIRST STACK HAVING A FIRST PAIR OF TERMINAL MEANS AND AT LEAST TWO JUNCTIONS THAT CAN BE IMMERSED IN SAID LIQUID AND THAT ARE (1) VERTICALLY SPACED APART TO BE SUCCESSIVELY IMMERSED BY A RISING LIQUID LEVEL, (2) ARRANGED IN CIRCUIT BETWEEN SAID FIRST TERMINAL MEANS TO DEVELOP A NET THERMOELECTRIC VOLTAGE THEREBETWEEN WHICH CHANGES BACK AND FORTH BETWEEN AT LEAST FIRST AND SECOND VALUES AS THE LEVEL OF SAID LIQUID RISES OR DESCENDS PAST EACH IMMERSIBLE JUNCTION OF SAID FIRST STACK, (D) AT LEAST A SECOND STACK HAVING A SECOND PAIR OF TERMINAL MEANS AND AT LEAST TWO FURTHER JUNCTIONS, AT LEAST ONE OF WHICH CAN BE IMMERSED IN SAID LIQUID, AND THAT ARE (1) VERTICALLY SPACED APART, (2) ARRANGED IN CIRCUIT BETWEEN SAID SECOND TERMINAL MEANS TO DEVELOP A NET THERMOELECTRIC VOLTAGE THEREBETWEEN WHICH CHANGES BACK AND FORTH BETWEEN AT LEAST TWO DIFFERENT VALUES AS A THE LEVEL OF SAID LIQUID RISES OR DESCENDS PAST EACH IMMERSIBLE JUNCTION OF SAID SECOND STACK, AND (E) OUTPUT MEANS RESPONSIVE TO THE NET THERMOELECTRIC VOLTAGES DEVELOPED BY THE RESPECTIVE STACKS.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |