Patent GB-189805385-A (GB)
Title: Improvements in or relating to Punch and Matrix Making, Die Cutting, and Engraving Machinery.
Inventor: DEDRICK NICHOLAS
Filed: 1898-03-04
Granted: 1899-02-04
Abstract: 5385. Dedrick, N. March 4. Engraving.-Relates to a machine for cutting designs in metal or other suitable substance used for making punches, dies, or engraved plates ; the machine is particularly designed for use in making punches to be employed in sinking dies of the nature of matrices to be used in type-casting machines. The machine is provided with a pantographic and other apparatus for transmitting the horizontal movements of the tracer carrier to the work carrier, and with hydraulic apparatus Z, for transmitting the vertical movements of the tracer to the graver or burin. The tracer A, Figs. 2 and 3, is carried by a holder I<g> fitted within a sleeve I<e> mounted within a tracer head I<d>, which is supported by an arm I<b> and pillar I. The holder I<g> can be raised or lowered by means of a thumb nut I<h>, and the sleeve I<0> may be held tightly by means of the lower end of the head I<d>, which is split and fitted with a nut I<1>. By means of a handle I<c> the tracer head can be moved over the pattern table 0, by the operator, who can also raise or lower the tracer by means of a lever I<m> which engages with a collar I<f> adjustably secured to the sleeve I<e>. This collar also actuates the forked end of a lever I<l>, which is mounted upon a post I<k> and is connected to the plunger I<y> of one of the hydraulic cylinders I<r> used for transmitting the vertical movements of the tracer to the burin. The pillar I is supported by a travelling carriage B<e> mounted upon a track plate which is supported by a second travelling carriage B<c> mounted upon a track plate B ; the carriages move upon ball bearings, and are prevented from moving vertically by flanges B<a>, B<a> on the track plates. The track plates are angularly adjustable upon their supports by means of bolts and segmental slots. A work-holder K is supported by a travelling carriage H<e>, Fig. 2, mounted upon a track plate H<d>, which is supported by a second travelling carriage mounted upon a track plate H. The movements of the lower carriage of the tracer carrier are transmitted to the lower carriage of the work carrier by means of a lever P<b>, which is adjustably connected to the travelling carriages and works about a fulcrum upon an adjustable arm secured to the table T of the machine. The motions of the upper travelling carriage of the tracer carrier are transmitted to the upper carriage of the work carrier by a pantographic system of levers, Fig. 41, some of which are adjustably connected by joints provided with ball bearings. The bars R, R<a> are pivoted together, and also the bars R<b>, R<c>, and the bars R<b>, R<c> are adjustably connected to bars R, R<a> respectively. The upper travelling carriage Be is connected to the bar R at B<1>, the bars R<b>, R<c> are connected at r<b> to the upper carriage of the work-holder, and the distant end of the bar R<a> forms the fixed fulcrum of the pantograph. Ball bearings are provided at the joints of the bars. In order to facilitate the adjustment and action of the pantograph when used for greatly-reduced reproductions, a supplementary arrangement of links comprising bars R<y>, R<x> and a bar R<z> of adjustable length is fitted to the pantograph, as shown in Fig. 41. The work-holder K is fitted within T-shaped channels formed in a bed J<e> capable of sliding upon a bed Jb supported by a plate J which is mounted upon the carriage H<e> so as to be adjustable in azimuth. The holder K is intended for punch blanks, and comprises a clamp k mounted so as to be vertically adjustable upon a standard J<1>, by means of a screw k<1>. A holder for matrices is provided with holding-jaws for two or more matrices, such jaws being mounted upon rotary sleeves adapted to force the matrices against a fixed top plate. In order to enable the matrices to be brought in succession beneath the graver, without having recourse to the transmission of motion from the tracer carrier, the holder is provided with means for moving it bodily by hand through the required distances. A holder for plates has a grooved bed to which the plates are secured by clamps. When cutting straight lines, guiding-appliances on the travelling carriages of the tracer carrier may be employed. The graver or burin V<h>, Fig. 2, is secured within a holder fitted inside a sleeve rotated by means of a pulley V<l> and fitted within an outer sleeve which is mounted in a non-rotary sleeve fitted within a split head A. A ring V<b> on the non-rotary sleeve engages with the forked end of a pivoted lever mounted upon an arm carried by the head A'. The lever serves to raise the tool carrier, and the ring V<b>, when rotated, adjusts the sleeve vertically. The head A<1> is supported by a carriage A<e> which is mounted upon a bracket A<d> and is adjustable by means of a screw A<f>. The tool may be set to make cuts of the depths desired by means of a finger or gauge bar X<h> which can be adjusted vertically and swung beneath the point of the tool. The hydraulic cylinder I<r>, Fig. 3, communicates with a similar hydraulic cylinder, beneath the lever which serves to raise the tool carrier, by means of pipes Z connected by water-tight joints Za. In order to preserve the proper proportional thicknesses of the lines of letters &c. when these are reproduced so as to be extended or magnified in one direction, a tracer may be employed of suitable oblong cross-section at the plane in which it abuts against the pattern walls.