Patent GB-190428439-A (GB)
Title: Improvements in Matrix and Punch Cutting Machines
Inventor: NEWTON HENRY EDWARD
Filed: 1904-12-27
Granted: 1905-04-13
Abstract: 28,439. Newton, H. E., [American Type Founders Co.]. Dec. 27. Engraving.-An engraving-machine for cutting type matrices or punches comprises a base A, Fig. 1, for supporting the pattern, from which rise two standards B, to the upper ends of which is secured a horizontal rectangular frame C. Within the frame C is supported a swinging rectangular frame D, pivoted by means of pins 1 engaging bars 19, the frame D being supported and adjusted vertically therato by means of screws 21 screwed into uprights 18 of the frame. Bearing-blocks 22 of different depths are employed to determine the various positions of the frame D. Within the frame D is a third rectangular frame, pivoted by means of pins 2 in the frame D at right-angles to the pins 1, and supporting a frame F consisting of four rods f for carrying the tracer rod g and the cutting- tool. The cutting-tool I, Fig. 5, rotates within a sleeve 27, carried by a socket 28 pivoted in a ring 29 by means of pins 3. The ring 29 is pivoted by means of pins 4 at right-angles to the pins 3 to a frame 30, provided at its corners with depending sleeves 31, which slide freely on the rods f of the swinging frame F. The sleeve 27 is secured in the socket 28 by a thumb-screw 33, which bears against a split ring 34. The socket 28 is provided with two circular plates 35, 36 adapted to move in horizontal planes in contact respectively with the upper and lower surfaces of a ring 37 carried by a block J adjustably mounted on the vertical standards B of the frame and secured by bolts 42, The position of the sleeve 27 carrying the cutting- tool I in the socket 28 is determined by the stop 6, Fig. 1. The tool I is provided at the upper end with a groove 102 extending about half-way round the circumference. On the head is placed a cap 103 fast to the end of a flexible shaft 100 for driving the tool, a pin 104 on the inside of the cap entering the groove 102 by means of a slot 105. The work-holder K, Figs. 1 and 7, is mounted on a block 45 sliding in a groove in the top of a vertically-adjustable block 50 set into the block J. The block 45 is provided on its underside with a T-shaped groove 51 having bevelled edges, which rests on a seat 52 on the upper face of the block 50. The block 45 is held down on its seat by a bolt 54 sliding in a central aperture 53 of the block 50, the head 55 of wbich passes into the groove 51 of the block 45. The bolt 54 is normally raised by a spring 60 and is adjusted by means of a bolt 57, the end of which is tapered and passes through a corresponding aperture 56 in the bolt 54. The block 50 slides on vertical ribs 61, 62 on the block J and on a wedge block 63, adjusted by means of a bolt 66 in a plate 67 which is secured to the underside of the block J and is held by screws 64. In the lower end of the aperture 53 in the block 50 is secured by means of a pin an internally-threaded sleeve 70, split, tapered, and screwed to receive a binding-nut 71, the upper end forming a bearing for spring 60. Through the centre of the sleeve 70 is screwed a finely-threaded bolt 72, carrying a micrometer disc 75, and provided at its lower end with a nut 79, which bears against the underside of a screwed bush 77. The depth of the cut made on the matrix is regulated by means of the micrometer disc 75, and the work is brought up to and withdrawn from the tool by turning the bush 77 by the milled head 78. A catch, which serves also as an index, is provided to hold the disc 75. The work-holder K comprises a base k with vertical side flanges k<1>, k<2>, provided with adjusting-screws 83, 84. Between the flanges k<1>, k<2> and resting on the base k is a wedge plate 85, on which the matrix M and two gauge-blocks 86, 87 are supported. The matrix is held by two adjustable bars 88, 89 secured by screws 90, the rear one 89 of which is provided with a depending portion against which the matrix is placed. The bar 89 abuts against a gauge-block which may be varied to suit different lengths of matrices and are held in position by vertical fingers on a horizontal bar secured to the base k, between which the end of the wedge plate 85 passes. By varying the gaugebars 86, 87 and adjusting the matrix against one of these bars by means of the screws 83, 84 on the opposite side of the work-holder, matrices may be cut with margins of standard width on either side to suit any type of casting-machine. The base k of the work-holder may be made integral with the block 45, but is preferably provided on its underside with a shank 47 passing through the block 45 and secured by a nut 48, which may be manipulated when the block 45 is removed from the block 50. The shank is provided with a tapered projection 46 fitting on a corresponding seat, to compensate for wear. This construction allows the matrix to be rotated for producing italicized type. The pattern-holder o is mounted in a similar manner to the work-holder K, and both work-holder and pattern-holder are preferably provided with circular scales to indicate the amount of rotation. The machine may be adjusted for cutting matrices for italicized type by rotating the frame f round its axis instead of turning the pattern and matrix as described. When the machine is employed for cutting punches, a block provided with gauge-pieces and set-screws for holding the punch and mounted as described is substituted for the matrix-holder. The ratio of reduction of the pattern is determined by adjusting the block J vertically. To produce punches or matrices for condensed or extended type, in which the letter is reduced in the two dimensions in different proportions, the frame D is adjusted to a position below or above the pivots 1 by the screws 21, by which means the two components of the movement of the tracer are modified independently. The tracer rod g is adjustable in the frame G to compensate for this movement of the frame D. Tracing-points to compensate for non- proportional reproduction are employed.