GB131333A - - Google Patents

Abstract

131,333. Aeronautical Instrument Co., and Brewer, G. May 2, 1918. Anemometers and air-current indicators.-Static and wind pressure tubes on aircraft are flexibly supported at their centre of gravity and provided with vanes so that they can adjust themselves within limit to the direction of the wind current. A flexible tube communicating with the pressure tube at its pivotal point conveys the pressure to a fixed tube on the aircraft. Fig. 1 shows a static pressure tube 4 flexibly suspended at its centre of gravity and provided with a conical rear end 8 or other vane. The tube 4 is divided at its point of suspension by an inclined partition 5, and the forward end communicates through a nozzle 6 and flexible tube 7 with a fixed tube 1 on the aircraft. A plate 14 secured to the partition 5 is secured to flexible connexions 9, 11 anchored respectively to a fixed frame 3 and to the tube 1. A spring 12 may be interposed in the connexion 11 which is enclosed by the tube 7. Fig. 4 shows a modification in which the tube is hinged about a transverse pin at the upper end of a spindle 16 capable of turning in a rigid arm 18 which is cruciform at its lower end and secured in the fixed tube 1. A flexible tube 7 surrounds the arm 18 and puts the tube 4 into communication with the tube 1.