GB191200483A - Improvements in or relating to Airships or Aeroplanes or the like. - Google Patents

Abstract

483. Wilson, W. J. July 5. Propelling; balancing.-Air-ships, aeroplanes, &c. are balanced by the manual or automatic alteration of the pitch of single or twin propellers Fig. 1 shows one arrangement, in which the propeller blades are connected each to a rod d<4> connected to the rotatable collar d and to a rod e<4> mounted on a rotatable and slidable part e<2>. The sleeves e<2> are moved in the same direction, when an oppositely screwed sleeve g' is rotated, through bell-crank levers f and links e<3>. The collars d are connected through bevelgearing c, c<1> to the motor-driven shaft b, and the propeller blades are normally in the neutral position. When the sleeves e<2> are moved similarly, the two propellers tend to lift or depress the part of the machine to which they are secured. By the movement of the sleeve g<1> as a whole to either side, brought about manually through a lever i or automatically by a weight attached to the lever i as when the machine tilts, the propellers are differentially adjusted. As shown in Fig. 2, the propellers are adjusted through cams j pivoted at k, k<1> on which axes pinions are fixed meshing with a rack k<2>. By rotating a wheel l on the axis k, the pins f<3> on the bell-crank levers fare both moved outwards or inwards due to their movement in the cam-slots j<1>, and the propellers are similarly adjusted. The rack k<2> is connected through a pin m<2> which fits in a camslot m<1> with the manually or gravitationally operable cam m, so that the rack and cams j may be moved bodily in order to adjust the propellers differentially. In a further form, Fig. 3, the collar d is adjusted relatively to the seeve e<2> by means of cams p connected by a link r. Endlong movement of the link r through the cam q, brought about by hand or by a weight s<2>, alters the propeller blades similarly. A single propeller, operated as shown in Fig. 3, by a cam p and with a weight attached to the part p<2>, may be placed at the front or rear of the machine. A vertically rotating single propeller rotating about a transverse axis may be placed at each side of the machine above the centre of gravity and be operated by a weightcontrolled cam p. In all cases, the propellers are normally rotating in the neutral position.