GB293937A - Improvements in sprocket chains - Google Patents

Abstract

293,937. Soc. Anon. des Etablissements Brampton, and Edwards, A. C. May 13, 1927. Driving-chains with separate joint pins.- The link plates of spocket chains are connected together by floating pins having flat sides upon which are adapted to roll bearing portions associated with the plates, each plate or pair of plates having a separate bearing portion. The floating pins 6, Fig. 3, or 16, Fig. 6, are of part circular cross-section and have flat sides 7,17. In silent chains the holes 5 through the plates have convex parts adapted to roll on the flat sides of the pins. Bushes 3, Fig. 3, of corresponding shape may be fitted in the holes or bearing surfaces may be protected by a convex plate 9, Fig. 4, or the surfaces may be left unprotected but hardened. In roller chains the bushes 15, Fig. 6, connecting the inner link plates 12 may be shaped like the bushes 3, the space between the convex surface 14 and the surrounding roller 18 being filled by a floating packing piece 19.