GB176775A - Improved chain especially suitable for use in conveyors and the like - Google Patents

Abstract

176,775. Wilmot Engineering Co., (Assignees of Law, J. C.). March 9, 1921, [Convention date]. Driving and like chains with separate joint pins.-Chains for coal - handling machines &c. comprise alternate single links 1 and double links 2 having thickened ends so that the width of the chain may be decreased by sliding the links 1 within the links 2 from the position shown in Fig. 1 to that shown in Fig. 3, the links being connected together by pintles 8, Fig. 5, adapted to be passed through slots in them when collapsed as shown in Fig. 3, and the pintles having angular members 10 which are lodged in the said slots to prevent the pintles from rotating. To assemble the chain, the pintles are passed into the collapsed links and are then turned through a right-angle, and then the links 1 are drawn apart to expand the links 2. To take up wear in the chain, washers 20 shaped as shown in Fig. 8 are inserted between the heads 9 of the pintles and the link-plates as shown in Fig. 6. The pintles may be extended axially, as shown at 15, Fig. 9, to engage in notches in the flanges of driving-pulleys. In a modification, the central cylindrical parts of the pintles are made too short to permit the necessary turning movement when being inserted into links arranged as shown in Fig. 3. In this case, the width of the links must be further reduced by turning the links 1 into the position shown in Fig. 11, so that only their thin central webs come between the plates of the links 2. The heads 9 of the pintles may be lodged in recesses 2<b> in the plates 2 as shown in Fig. 13.