GB221893A - Improvements in and relating to means for handling or transporting parcels, bales ofgoods and the like - Google Patents

Abstract

221,893. George, D. June 25, 1923. Lifting-dogs; lifting-cradles.-In a lifting appliance for gripping loads such as bundles of blackplates &c. of the type comprising L-shaped arms 15, 17 and pivoted cams or levers 21 which are connected with the lifting chains 23 and bear on the load at points substantially vertically beneath their pivots, the arm of the lever 21 engaging the load is equal to or greater than the arm connected with the lifting chain. The angle between the parts 15, 17 may be slightly less than 90‹, and the inner ends of the feet 17 and 22 may be broad. Packing 24 may be inserted between the feet 22 and the load, and to accommodate dirferent loads, different thicknesses of packing may be used, the length of the lever 21 may be varied, a number of pivot holes being provided in the lever for this purpose, or interchangeable levers 21 of different sizes may be used. As shown in Fig. 4, the foot 22 is pivoted to the lever 21 and is adjusted by a turnbuckle 25. Alternatively, the member 15 may be of adjustable length. When more than one pair of dogs is used, the chains 23 are spaced by spreaders. The dogs on each side of the load may be connected by longitudinal members. To permit of withdrawal of the feet 17 after the load has been deposited in a confined space, the foot 17<a> is hinged to the vertical member 28, Fig. 5, but the hinge is normally locked by a pin 33. When the lever 21 has been released from the load, the lifting chain is slackened and an extension 34 of the lever 21 is connected to a chain 35 attached to the looking pin. On hauling the lifting chain, the pin 33 is removed from the hinge and the dogs are then raised, the feet 17<a> being drawn from beneath the load. Guides may be provided for the locking pin. The chain 35 may be replaced by a hooked rod or link 39, Fig. 9, brought into position to engage the member 34 by a hand-lever against the action of a spring 41. A sliding rod in place of the pivoted link 39 may be connected with the member 34 by a sliding bolt. In another form the hinge is locked by a spring-pressed sliding member on the part 15 engaging a projection on the boss of the hinged foot. As shown in Fig. 12, the locking pin 33 terminates in a hook 48 which may be automatically engaged by a ring 49 on the lever 21 when the latter is depressed. The levers 21, 22 may be locked in the gripping position by pawls 51 on the member 15 engaging ratchet wheels on the levers.