GB574238A - Improvement in engine starter gearing - Google Patents

Abstract

574,238. Turning-gear. BENDIX AVIATION CORPORATION. Jan. 19, 1944, No. 1073. Convention date, Jan. 20, 1943. [Class 7 (v)] In an engine starter having a pinion 2, Fig. 3, adapted to be moved into and: out of engagement with an engine pinion 3, the pinion is latched in engagement with the engine gear until the driving shaft 1 of the starter is rotated above a predetermined speed whereupon it is unlatched and before the parts disengage is latched again until the driving shaft is decelerated below a predetermined lower speed. A nut member 6, axially displaceable along a screwed shaft 4 secured on the shaft 1, rotates, through a resilient sleeve 19, the driving member 11 of a clutch 11, 7 the driven member 7 of which is in operative connection with the pinion 2. On starting, the nut member 6 runs up the screw shaft 4 until the pinion 2 engages a shoulder 21 on the driving shaft 1 whereupon the nut member 6 compresses the sleeve 19 against the clutch member 11, engaging the clutch and driving the pinion 2. At this time, a latch member 22, Fig. 4, is turned about its pivot 23 by a spring 27 to insert a projection 24 on the latch into a notch 26 in the screw shaft 4 to prevent withdrawal of the pinion 2. When the pinion 2 overruns the nut member 6, centrifugal force acting on the longer arm 28 of the latch unhooks the projection 24 and engages a second hook 25, on the opposite side of the pivot 23, with the shaft 4, this engagement continuing until the power is cut off and the speed of the starter drops below that at which the centrifugal force overcomes the spring 27. Specifications 443,590 and 554,165 are referred to.