Machine control system
Abstract
Abstract THE CONTROL SYSTEM INCLUDES AT LEAST TWO UNITS WHICH MUST BE OPERATED SUBTANTAILY SIMULATENEOUSLY TO START OPERATION OF A MACHINE EACH UNITS INCLUDES A FLUID DISPLACEMENT DEVICE, SUCH AS A DEVICE INCLUDING A CYLINDER A PISTON MOVEABLE IN THE CYLINDER, A VENT PASSAGE WHEN THE PISTON AND A SEAL FOR CLOSING THE VENT PASSAGE WHEN THE PISTON IS MOVED IN CYLINDER TO DISPLACE FLUID THEREIN. EACH CYLINDER IS CONNECTED TO A CHAMBER HAVING A PRESSURE SENSITIVE TRANSDUCER, VALVE OR SWITCH ASSOCIATED THEREWITH WIHICH IS ACTUATED ONLY WHEN A PREDETERMINED MINIMUM FLUID PRESSURE OR MINIMUM FLUID VOLUME IS ESTABLISHED IN THE CHAMBER BY REASON OF FLUID DISPLACEMENT IN THE UNITS WHICH CAUSE COMPRESSION OF THE FLUID IN THE CHAMBER OR AN INCREASE IN THE VOLUME OF THE FLUID IN THE CHAMBER THIS MINIMUM OPERATING PRESSURE OR VOLUME INCREASE IS ONLY ESTABLISHED WHEN THE TWO PISTONS ARE MOVED TOGETHER, FIRST TO CLOSE THE VENT PASAGES, AND SECOND TO DISPLACE THE FLUID TRAPPED IN THE CYLINDERS.
Inventors
- 👤 Lee A Wright
Bibliographic Details
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |