Combiner mounting and stowage mechanism

Details Combiner mounting and stowage mechanism Combiner mounting and stowage mechanism

B - Operations, Transporting

64

D

88/109, 88/46, 3

B64D 43/00 (2006.01) G02B 27/00 (2006.01) G02B 27/01 (2006.01)

Patent

CA 1321501

COMBINER MOUNTING AND STOWAGE MECHANISM ABSTRACT OF THE DISCLOSURE 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 insentitive 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.

515688

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