Fluid handling – Ambient condition change responsive – Atmospheric
Patent
1980-10-23
1983-07-05
Chambers, A. Michael
Fluid handling
Ambient condition change responsive
Atmospheric
137340, 137556, 251 29, 60 3975, 60 3983, F16K 3112, F16K 4900, F16K 3700
Patent
active
043912907
ABSTRACT:
In one form of the invention, the control apparatus includes two stages: a poppet first stage and a piston second stage. The poppet first stage includes an altitude sensitive evacuated bellows coupled to a poppet valve. The second stage piston includes a pair of opposing head portions separated by a rod portion. The apparatus includes an output port which is coupled to a low pressure pneumatic signal or to a high pressure pneumatic signal, depending upon the position of the piston. For altitudes less than a predetermined altitude, e.g., 20,000 feet, the first stage develops a pneumatic servo signal which causes the piston to be in a first position which couples the output port of the apparatus to ambient air pressure. For altitudes greater than the predetermined altitude, the first stage develops a pneumatic servo signal which causes the piston to be in a second position which couples the output port of the apparatus to a high pressure pneumatic signal. The high pressure pneumatic signal may comprise the compressor discharge pressure of a gas turbine engine. Backup means is provided for accommodating failure of the bellows. Indicator and adjustment means are also provided for ensuring an accurate, reliable, and repeatable, control apparatus output signal.
REFERENCES:
patent: 2371428 (1945-03-01), Giers et al.
patent: 2633868 (1953-04-01), Berhoudar
patent: 2668415 (1954-02-01), Lawrence
patent: 2741088 (1956-04-01), Andrews et al.
patent: 2911790 (1959-11-01), Brahm
patent: 2981058 (1961-04-01), Reed
patent: 3355992 (1967-12-01), Jacobson et al.
patent: 3393606 (1968-07-01), Maynami et al.
patent: 3403598 (1968-10-01), Franz et al.
patent: 3596669 (1971-08-01), Alberani
patent: 3875957 (1975-04-01), Veit et al.
patent: 3967533 (1976-07-01), Tyler
patent: 4069662 (1978-01-01), Redinger, Jr. et al.
patent: 4200120 (1980-04-01), Kimata et al.
patent: 4304093 (1981-12-01), Schulze
Chambers A. Michael
General Electric Company
Lawrence Derek P.
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