Cryogenic liquid sensor
Abstract
Abstract A SENSOR UNIT FOR USE IN CONJUNCTION WITH A CRYOGENIC VESSEL IS PROVIDED, AND WHICH MAY BE USED TO RESPOND SELECTIVELY TO THE PRESENCE OF A LIQUID IN A TWO PHASE GAS/ LIQUID FLOW, SUCH AS THE OVERFLOW FROM ACRYOGENIC VESSEL VENT OR CRYOGENIC TRANSFER TUBE. THE SENSOR MAY BE USED TO TRIGGER RELAYS AND SOLENOID OPERATED VALVES, SO AS TO SHUT OFF THE SUPPLY TO THE VESSEL WHEN THE CRYOGENIC LIQUID STARTS TO OVERFLOW. THE UNIT INCLUDES AN ELECTRIC RESISTANCE WIRE ELEMENT WHICH IS WOUND ON A POROUS TUBULAR SUPPORT MEMBER. THE ELECTRICAL RESISTANCE OF THE WIRE ELEMENT DECREASES TO PROVIDE A DESIRED ELECTRICAL CONTROL EFFECT WHEN THE POROUS TUBULAR SUPPORT MEMBER BECOMES SATURATED WITH THE CRYOGENIC LIQUID. HOWEVER, THE RESISTANCE OF THE WIRE ELEMENT IS RELATIVELY UNAFFECTED BY COLD GASES PASSING THROUGH THE TUBULAR SUPPORT MEMBER SINCE IT IS THERMALLY INSULATED FROM SUCH GASES BY THE SUPPORT MEMBER IN ITS UNSATURATED CONDITION.
Inventors
- 👤 Wallis M Tener
Bibliographic Details
Claims Analysis
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |