Patent GB-191222106-A (GB)
Title: Improvements in or relating to Machines or Apparatus for the Production of Type Matrices or similar Bodies.
IPC: B41B11/00
Filed: 1912-09-28
Granted: 1913-04-03
Abstract: 22,106. Pierpont, F. H., and Lanston Monotype Corporation. Sept. 28. Milling-machines.-Type-matrices are milled to correct length and depth of matrix cavity in an automatic machine with an oscillating blank-carrier which carries the blanks first to a gauging-needle for setting the blanks accurately in the carrier and then past two alined end-milling cutters. The gauging-needle is also used for setting the machine for standard blanks. A reflecting microscope is provided to facilitate the adjustments of the workcarrier with reference to the gauging-needle. Gauging-devices; axial spindle feeds. - The gauging-needle B, Figs. 5<a> and 6, is pressed forward by a spring B<12> which is released periodically by a cam-piece B<3>. To adjust the needle for a standard blank, the blank is pressed against an anvil O by a pusher O<1> and the needle is pushed forward by its spring and a handle-operated measuring-cam B<14> is moved until contact energizes a magnet K and causes a stop-pawl K<1> to engage the cam. The reading on a scale B<16>, Fig. 4, is then taken and this is brought back to the zero-mark B<17> by a micrometer-screw B<23>, Fig. 5<a>, which adjusts the cam-frame about its pivot B<22>. A micrometer for axially adjusting the cutter C' is then turned in accordance with the reading of the micrometer B<23>; this sets the cutter to give the depth of matrix required. The cutters are adjusted from the micrometers by worms j<1>, thus screwing the spindles through nuts c<2>. Blanks, transferring.-The blanks are supplied by a galley E, Fig. 15, to an oscillating carrier A and are discharged from the carrier to a galley E'. The outlet of the galley E is normally closed by a camoperated pusher D ; this pusher, when retracted, allows a blank to fall into engaging position, and on being pressed forward delivers the blank to the carrier. Further forward movement of the pusher, after the carrier has been returned, drives the blank in front of the discharge galley, into which it is pressed by a pusher D" operated by a cam D<20>. When the machine is being adjusted, the camoperating means for the pusher D is put out of operation. Work-tables; work-table feeds; speed-controlling mechanism.-The work-carrier A has a spring- pressed jaw A<3>, Fig. 5<a>, which holds the blank lightly during the gauging and is caused to grip positively after gauging by a cam A<5>; it is operated by levers from a cam A<10>, Fig. 4, and carries the blank from the galley F to position shown in Fig. 8 where gauging is effected, and then carries the blank past the cutters C, C' and back to the galleys. During the cutting, the carrier is driven at a reduced speed by an automatically-controlled change-speed gear N, Fig. 4, which controls the cam shaft Z. This gear has two driving pulleys N<2>, N<3>, each loose on a shaft N<1> ; the pulley N<2> carries a pinion N<6> engaging pinions N<7> on a disk N9 which in turn gear with a pinion N<10> keyed to the shaft N'. The disk N<9> carries a ratchet-wheel N<15>, the pawl of which is normally out of engagement ; for normal or high speed the gears interlock and rotate the shaft N' direct, but when the pawl is tripped by a projection N<11> on a cam D'‹, the gear drives at low speed through the pinions, the pulley N<3> then slipping. The cam shaft Z is driven from the shaft N' through a pinion Z' which drives its shaft through a band clutch ; handles M, P are provided for operating the clutch to stop the carrier in the gauging and blank-transferring positions respectively. The carrier is adjustable in two directions relatively to the needle, the adjustments being effected by handle-operated cams F<1>, F<2>. Chucks.-The cutters are held by screwed rods C<20>, C<21> with square ends, the inaccessible one C<20> having a spanner C<22>.