GB551952A - Improvements in and relating to stock feed mechanism for lathes or other machine tools - Google Patents

Abstract

551,952. Feeding and supporting bar stock in lathes &c. PUCKERT, E. W. Sept. 15, 1941, No. 11814. [Class 83 (iii)] Overhanging bar stock is supported in lathes &c. by a tube 4 having a bayonet connection 18, 19 with a fixed part 20 of the headstock concentric with the spindle. The tube is supported by two standards, the rear one by a universal joint and the forward one by a crutch having two locating positions one in line with the spindle and one offset so that a fresh bar may be fed in from the front end. The stock is supported in an inner tube 1 and is fed by a cam 5 when permitted by the opening of the chuck. Interposed between the ram and the end of the stock is a rotatable member 8 having a coned head 9 and a ball thrust 11, 12. The tube 4 is closed by a cap 22 in which a taper sleeve 21 provides a mounting for the coned end of a plug 6 that closes the tube 1. Ports 7, 23 communicate with the tube 1 and with an air supply nipple respectively and in the operative position are connected by a part 24. A collar 1<SP>1</SP> on the tube 1 carries a handle 26 projecting through an arcuate slot 27 in the tube 4 that permits the tube 1 to be rotated in bearings 2, 3 sufficiently to close the port 23 and connect the port 7 to an exhaust port, (not shown), in the cap 22. Further movement of the handle serves to disconnect the bayonet joint. The handle is formed as a whistle to sound an alarm when the ram 5 passes the port 29 to indicate that a new stock-bar is required. According to the Provisional Specification oil may be fed by a wick to the air supply nipple to be carried by the air to the cylinder to lubricate the ram.