Thermal differential sensor for refrigeration systems
Abstract
Abstract A LIQUID LEVEL CONTROL DEVICE FOR A REFRIGERATION SYSTEM HAVING A VESSEL IN WHICH LIQUID REFRIGERANT IS ACCUMULATED AT A LOW TEMPERATURE. THE CONTROL DEVICE COMPRISES A THERMOSTAT CLAMPED IN THERMAL CONTACT ABOUT A TELLTALE TUBE WHICH COMMUNICATES WITH THE VESSEL, THE THERMOSTAT HAVING A TEMPERATURE-RESPONSIVE ELEMENT PROVIDING ROTARY MOVEMENT IN RESPONSE TO THE TEMPERATURE OF THE LIQUID LEVEL WITHIN THE TELLTALE TUBE. THE TEMPERATURE-RESPONSIVE ELEMENT IS MECHANICALLY CONNECTED TO AN ELECTRICAL SWITCH, PREFERABLY OF THE MERCURY TYPE, WHICH IN TURN, IS IN ELECTRICAL CONNECTION WITH A CONTROL VALVE WHICH REGULATES THE SUPPLY OF LIQUID REFRIGERANT TO THE VESSEL. A HEATING ELEMENT IN INTERCONNECTED IN WITH THE VESSEL. A HEATING ELEMENT IS INTERCONNECTED IN THE CIRCUIT AND ARRANGED TO HEAT THE TELLTALE TUBE IN PROXIMITY TO THE THERMOSTAT TO CAUSE THE THERMOSTAT TO REACT PROMPTLY AND ACCURATELY IN RESPONSE TO TEMPERATURE CHANGES INDUCED BY THE CHANGING LIQUID LEVEL.
Inventors
- 👤 Charles P Wood Jr
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |