Water level controls for steam tables and the like
Abstract
Abstract A UNIT ACCESSORY TO STEAM TABLES AND THE LIKE FOR AUTOMATICALLY REPLENISHING THE SUPPLY OF WATER IN THE TROUGH OF THE STEAM TABLE WHEN THE WATER LEVEL FALLS TO A LOW LIMIT, TO SHUT OFF THE WATER SUPPLY WHEN THE WATER LEVEL RISES TO A ROUTINE HIGH LEVEL, AND TO SHUT OFF THE POWER IN CASE THE WATER SHUT-OFF FACILITY FAILS AND THE WATER RISES TO AN EXTREMELY HIGH LEVEL. THE UNIT OPERATES AN EMERGENCY RED SIGNAL LAMP AT THE LOWEST AND HIGHEST WATER LEVELS AND AN AMBER SIGNAL LAMP DURING NORMAL OPERATION. THE UNIT EMPLOYS AS SET OF ELECTRODES WHICH DEPND TO DIFFERENT LEVEL IN THE WATER TROUGH, AND ARE RESPONSIVE TO WATER CONTACT AT THEIR LOWER ENDS TO FORM CIRCUITS EMPLOYING THE CONDUCTIVITY OF THE WATER AND A SOLENOID-ACTUATED VALVE TO TURN ON THE WATER.
Inventors
- 👤 Carl P Green
- 👤 Basil N Burnetti
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |