Month in the Patent Office

Abstract

A control member for aeroplanes comprises a universally mounted hand lever 1 carried by an arch or bridge‐shaped member 5, one extremity of which moves in a slot 4 in a stationary member 3, the other extremity being connected to a control rod 8, and a lateral extension 11 carrying a further control rod 12, the lever being capable of rotation on its axis and being connected by a second universal joint 13 to a flexible cable 14. Fig. 4 shows a dual control arrangement, fore‐and‐aft movement of the levers 1 operating bell cranks 8a connected to a link 8b. The latter is connected to a lever 8c operating the micro‐switches 8e of an electric motor 20, which moves the elevators through worm gearing 21, 22 and cables 32. Lateral movement of either lever 1 operates, through bell cranks 12a a link 12b, a second lever 12c controlling the micro‐switches of an electric motor 28 which controls the joint movement of the ailerons and rudder through cables 25, 29a. Trimming may be effected by rotating the hand lever 1 in a bearing 6 to effect relative movement of the levers 26, 29 to which the aileron and rubber cables 25, 29a are respectively connected. Hydraulic or pneumatic actuation may be employed instead of electric actuation.

Citation

(1950), "Month in the Patent Office", Aircraft Engineering and Aerospace Technology, Vol. 22 No. 10, pp. 315-315. https://doi.org/10.1108/eb031960