Redundant vacuum system for aircraft instruments

Details Redundant vacuum system for aircraft instruments Redundant vacuum system for aircraft instruments

1981-05-04

1982-12-21

Woodiel, Donald O.

Measuring and testing

Navigation

Take-off and landing monitors

417 3, G01C 2100

Patent

active

043642683

ABSTRACT:
A redundant system for use in an aircraft instrument system of the type including a first pump adapted to be driven by an aircraft engine. At least one instrument is operably connected to the first pump. The redundant system includes a second pump selectively operably connected to the electrical power source of the aircraft and to the instrument. A switch is adapted to be connected to an air line connecting the instrument and the first pump, the switch being operable to provide an electrical connection between the second pump and the electrical power source in response to a change in pressure in the air line connecting the instrument and the first pump.

REFERENCES:
patent: 2348113 (1944-05-01), Davis
patent: 3558239 (1971-01-01), Schiber
patent: 3921748 (1975-11-01), Dunn
patent: 3923423 (1975-12-01), Lauck

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