Combiner mounting and stowage mechanism

Details Combiner mounting and stowage mechanism Combiner mounting and stowage mechanism

1985-08-14

1987-05-12

Corbin, John K.

G02B 2714

Patent

active

046644750

ABSTRACT:
A mounting and stowage mechanism erects a head-up display combiner into the pilot's line-of-sight. One end of a crank is mounted on the combiner and is pivoted on a first link which is pivoted to a frame. A support link is pivoted on the combiner and on a drag link which is pivoted to the frame. A connecting link is pivoted to both the first link and the outer pivot of the drag link to complete a compound 4-bar linkage which controls the path of the combiner between the erected position and a stowed position out of the pilot's line-of-sight. Manual control is through a handle which is mounted on a slider for linear motion and is connected to the end of the crank remote from the combiner. The mechanism is rendered insensitive to motion in the combiner-erect position by assuring that the instant centers of the links carrying the combiner are located at twice the focal length from the combiner along a line that runs through the center of curvature of the combiner and its focal point. The mechanism thus reduces optical errors caused by play or vibration in the mechanism.

REFERENCES:
patent: 3503146 (1970-03-01), Woplin
patent: 3552828 (1971-01-01), Lawrence et al.
patent: 3816005 (1974-06-01), Kirschner
patent: 4309070 (1982-01-01), St. Leger Searle
"Flight Dynamics-Holographic HUD for Commercial Transports" Jane's Avionics, Displays/USA 1984-1985; pp. 137-138.
"FAA Nears Transport HUD Certification" by Robert R. Ropelewski, Aviation Week & Space Technology, Oct. 1, 1984, pp. 145-161.
"PSA Prepares MD-80 Aircraft for Head-up Display Flights" by Cecillia Preble, Aviation Week & Space Technology, Oct. 15, 1984, p. 43.
"Application of Head-up Displays in Commercial Transport Aircraft" by J. R. Lowe and J. R. Ornelas, J. Guidance, vol. 6, No. 2, Mar.-Apr. 1983, pp. 77-83.
"DC-9-80 A Step Forward in Cockpit Automation", Interavia 12/1978, pp. 1197-1198.

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