GEARING MECHANISM OF A PNEUMATIC TACHOMETER WITH AN IMPELLER

Rotation of high-speed spindle 1 is transmitted through gears 3 and 4 to low-speed spindle 2 and further, through bevel gears 5 and 6, to the impeller with vanes a. The impeller is keyed to the shaft of gear 6 and rotates counterclockwise about axis A. Rotating in the housing, vanes a deliver a stream of air directed against vane d which is rigidly attached to hand b. The torque on vane d is count…