GB868706A - Inertia starter - Google Patents

Abstract

868,706. Turning gear. INSTART DIESEL COMPONENTS Ltd. Sept. 11, 1958 [Sept. 24, 1957], No. 2358/60. Divided out of 868,705. Addition to 780,062. Class 7(5). In an inertia starter of the kind incorporating a gear arrangement for transmitting drive between the starter flywheel 1 and the crank-shaft of an engine and comprising rotary input and output members 13 constrained to limited angular movement and connected by a coupling member arranged to rotate about a moving axis, the members having to be reset to a starting position after each drive-transmitting movement, a differential mechanism 5 consists of an element 6 arranged to be driven by a handle 7, an element 4 arranged to drive the starter flywheel, and an element 8 arranged to drive the members 13 back to the starting position thereof and move the starter pinion 16 into engagement with the engine flywheel 17. A clutch 21 splined on element 8 is moved by a cam 18 constrained to turn with the member 13 so as to lock elements 6, 8 together when the members 13 reach their starting position in order to reduce the ratio of the speed of the element 8 to that of the element 6. As shown, the flywheel 1 is connected by step-up gears 2 with a crown-and-pinion 3 driven by the differential 5 which in turn drives a differential 11 through worm and worm wheel 9, 10. The pinion 16 is actuated by a screwed shaft 15 driven by the differential 11. Due to the inertia of the flywheel 1 the elements 4 of the differential 5 are initially fixed and the drive passes to the element 8 which acts as a step-up gear. When the members 13 are reset and the members 6, 8 locked together the handle 7 turns the flywheel 1 by way of crown-and-pinion 3. The flywheel 1 is then coupled through the gears 2 by a clutch 22 to the members 13 to start the engine.