GB190714922A - Improvements in Machines for Milling, Facing and other Metal Cutting Operations. - Google Patents

Abstract

14,922. Pearn, W. A., and Pearn, F. June 29. Boring; milling; lathes.-In a machine of the type described in Specification No. 11,870, A.D. 1905, for milling, facing, boring; drilling, and like operations, the operative end of the headstock spindle carries a toothed wheel, to which a tool-holder is detachably connected and which may be driven from a back-gear. Power-operated means are also provided to give a quick movement to the work table and headstock. The headstock spindle a is driven from a pulley g, driven by a belt n from the main shaft at the bottom of the machine, the guide - pulleys h, i, Fig. 2; ensuring a large angle of contact. The pulley g is arranged between the bearings of the spindle, and drives the spindle direct or through the back-gear shaft d which is driven from pinions j or m. A pinion c on the shaft d drives a pinion b, connected to the spindle a and detachably connected to the tool carrier e. The quick -movement of table and headstock is obtained by depressing a foot-lever o, Fig. 5. This operates jockey wheels r, r' and drives pulleys q, q<1> by a belt p from the main shaft of the machine. By means of a clutch q<2>, the shaft w is then driven, and from this shaft the feedscrew shafts 1<a>, 1<b> of the table and the feed-shaft 2<a> of the headstock are driven through a clutch z and gearing. The shaft w may also be driven from a hand-wheel s, which can be put out of action by sliding on its spindle to obviate danger when power feed is used. Ordinary slow movements can be obtained by driving the shaft w from a clutchoperated worm 4.