Communications: electrical – Aircraft alarm or indicating systems – Landing gear indicator
Patent
1997-09-03
1999-09-21
Lee, Benjamin C.
Communications: electrical
Aircraft alarm or indicating systems
Landing gear indicator
340331, 340959, 340679, 73178T, 244100R, 244102R, G08B 2100
Patent
active
059559721
ABSTRACT:
Disclosed is an apparatus for displaying state and transition state information of mechanical equipment. A sensor and display system is provided for displaying aircraft landing gear status and other mechanism status. In one embodiment, the system utilizes two light emitting diodes (LEDs) for each landing gear leg to display the current position of each gear leg. One yellow LED indicates gear UP and the second green LED shows gear DOWN position. When the control switch is moved to change the position of the gear, the indicator light which had been lit is extinguished, and the indicator for the desired position begins to flash, indicating gear movement. The indicator will continue to flash until the gear leg has reached the limit of travel, at which time the indicator stops flashing and glows steadily. Each gear leg indicator operates independently of the others, so that proper position of each gear leg can be confirmed and any malfunction can immediately be identified. In another embodiment the indicator light glows steadily while mechanical equipment is in a transition state, and the light flashes when the mechanical equipment reaches a desired position.
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Donald L. Gibson, "A Simple Wiring Circuit", Sport Aviation, p. 95, Aug., 1995.
Forrest M. Mims, III, "Getting Started in Electronics", 1983.
William Wade, "Landing Gear Indicator System", Hints for Homebuilders, p. 90, Mar., 1995.*
"Direct Current Autosyn Position Indicator", by Pioneer (Pioneer Wheel and Flap Position Indicator), 6 pages, Mar. 5, 1940.
Lee Benjamin C.
Wade William G.
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