Trustworthy simplified vacuum systems

Aeronautics and astronautics – Miscellaneous

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Details

74 57, 73178R, 244 53R, 244 58, B64D 4100

Patent

active

047052333

ABSTRACT:
Vacuum systems deriving their trustworthiness by means of simplified apparatus, wherein, the vacuum source will be derived from simple venturis common to the state of the art, whereby, ice prevention will be achieved by use of bleed air from the turbine section of the jet engine used to power the aircraft. Venturi ice prevention will be selectable by the pilot and will fail safe to the on position should the aircraft encounter a complete electrical failure. The remaining units comprising of the vacuum system and connective tubing will all be common to the state of the art. One of the vacuum systems will supply regulated vacuum pressure to the earth reference gyros by means of a venturi being located within the inlet mouth of a jet engine, said pressure then routed to a pressure regulator and then routed to the gyros, therefore, regulated pressure will be available immediately following engine start and will remain available in flight even should its respective engine fail. Another vacuum system will supply variable vacuum pressure to the rate gyros, said variable being responsive to and proportional with the speed of the aircraft, thereby, the deflective sensitivity of the rate gyros will increase should the speed of the craft increase, conversely, the deflective sensitivity will decrease should the speed of the craft decrease, thus, speed compensated rate gyros.

REFERENCES:
patent: 1407491 (1922-02-01), Sperry
patent: 2080490 (1937-05-01), Kollsman
patent: 2136532 (1938-11-01), West
patent: 2181250 (1939-11-01), Reichel
patent: 2231090 (1941-02-01), Ross
patent: 2272986 (1942-02-01), Weinkauff
patent: 3261576 (1966-07-01), Valyi
patent: 4364268 (1982-12-01), Zompolas
patent: 4550564 (1985-11-01), Callahan et al.
The Aviation Consumer, Jun. 15, 1984, p. 3.
Precise Flight Inc., 63120 Powell Butte Rd., Bend, OR 97701, Standby Vacuum System, SVS III, 12/07/84 (3 pages).
US AIR Boeing 727-200 Pilots Handbook, Emergency, pp. 1-35-1, 1-35-2 & Inst/Nav/Comm, pp. 13-85-1, 13-85-2, all dated 6/01/85.

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