GB247980A - Arrangement for weighing goods in a hanging position - Google Patents

Abstract

247,980. Wahl, L. G. Feb. 19, 1925, [Convention date]. Apparatus fitted to cranes.-Relates to a combined hoisting and weighing device of the kind in which after the load has been raised to a certain extent it is automatically shifted from the hoisting cable to a weighing cable, and after the weighing has been effected, is shifted back to the hoisting cable, and consists in that the load so acts upon the gripping-levers during weighing as to cause them to swing open upon the lifting of the load. The hoisting wire 3 at its free end is attached to a ring 30 slidable within the tubular shank 31 of a goods hook 6. Projecting from the upper end of the shank 31 is a conical member 14, which on its underside is provided with a collar 33 adapted to co-operate with two semi-cylindrical collars 20, 20<1> formed on the inner ends of two levers 19, 19<1>. A casing 15 suspended from the weighing wire (not shown) is provided with two transverse shafts 17, 17'. Two arms 18, 18' are freely pivoted on the shafts 17, 17' and carry at their lower ends the levers 19, 19<1>. The shafts 17, 17<1> are provided at their ends with cranks 24, 24<1> between which two springs 25 are stretched, the springs normally causing projections 23, Fig. 5, to bear on the arms 18, 18<1> and thereby tending to draw the arms together. In use, the hook is raised by the hoisting wire into the position shown in Fig. 2, it is then lowered until it is supported on the collars 20. 20<1> and a weighment is made. The levers 19, 19' pivot under the load and force two rods 22, upwardly, thereby rotating the shafts 17, 17' and causing the springs to take up positions in which they tend to draw the arms apart, so that upon the raising of the hook the way is made clear for lowering. A cone 34 on the hoisting wire engages two cams 27, 27' during the lowering, and resets the device.