GB158050A - Improvements in hoists or winches - Google Patents

Abstract

158,050. Prinsep, F. T. L. Oct. 22, 1919. Driving-gear and regulating and control-transmitting gear for winding and paying-out apparatus.-In winches of the type in which a loosely-mounted drum can be moved by an eccentric and hand-lever in opposite directions from a central free position in which a brake is applied automatically, thus connecting the drum to friction gearing for driving it in one direction or the other, special means are provided for operating the brake and moving the drum simultaneously. In the illustrated form, the drum e is mounted loosely on the eccentric shaft f<1> and can be moved into contact with friction wheels b<2>, d<2> for driving in opposite directions. Each friction wheel is connected to a corresponding spur-wheel, one of which is driven directly from the motor shaft a<1> and the other through an intermediate spur-wheel c. The invention consists in linking the hand-lever j, which is fitted with setting and retaining devices j<4>, to a lever h<1> which carries a toothed quadrant h or rack for engagement wth a similar quadrant or pinion to rotate the shaft f<1>, and during its rocking movement also rotates the shaft h<2>, thereby operating an eccentric h<3> to apply or release the brake k<1>. In a modified application, the mechanism is applied to a winch drum with internal and external friction driving surfaces. In such cases one of the pair of wheels b<2>, d<2> contacts with the internal, and the other with the external surface of the drum, while the intermediate wheel c is ornitted.