GB632380A - Improvements in or relating to conveying devices - Google Patents

Abstract

632,380. Rope gearing for winches. HELLING, J. H. Jan. 13, 1947, No. 1138. [A Specification was laid open to inspection under Sect. 91 of the Acts, Dec. 18, 1947.] [Class 78 (v)] [Also in Group XXIV] Reduction gearing, particularly for elevators and like hoisting apparatus, comprises two pulleys rotating with different circumferential speeds and mounted co-axially to each other and coupled together by one or more endless transmitting elements which run about rollers carried by a member rotatably supported co-axially to both pulleys. As shown, two pulleys 3, 4, Fig. 3, driven by two different motors have braking drums 14, 15, and pins 11. The latter engage holes in an endless belt which passes round rollers 8, 9, on pins 6, 7, fixed to a cable pulley 5. In a modification the pulleys 3, 4, Fig. 6, are formed as rope pulleys of different diameters. A rope 20 passes round the pulleys 3, 4, and round rollers 16, 17, carried by a disc 23 driven by a motor 1. The cable pulley 5 is integral with the pulley 4 and the pulley 3 may be held fixed or driven by a motor 2. In another modification, the disc 23, Fig. 12 (not shown), is alternatively connectible to the driving motor and to a braking surface. In a further modification, rollers 16, 17, 161, 171, carried by a disc 23 on a driving shaft 21 are connected by ropes to a fixed pulley 3 and pulley 4 rigid with the cable pulley 5. Additional pulleys 16, 17, may be provided.