US1308067A - Arthur h - Google Patents

Description

A. H. HEDLY.

METHOD OF MAKING TYPOGRAPH MATRICES.

APPLICATION FILED AUGJS. 191T.

Patented July 1, 1919 WE? m K 6 Y w EVVEYQ 1 UNITED STATES PATENT ru n ARTHUR H. HEDLY, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE LUDLOW TYPOGRAPEE COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF MAINE.

METHOD FOR MAKING TYPOGRAPH MATRICES.

Specification of Letters Patent.

Original application filed. August 21, 1914, Serial No. 857,868. 7 Divided and. this application filed August 13.

To all whom it may concern Be it known that I, ARTHUR H. HEDLY, a-citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Methods for Making Typograph-Matrices, of which the following is a specification, the principle of the invention being herein explained and the best mode in. which I have contemplated applying .that principle, so as to distinguish it from other inventions.

-The present improvements relate, as indi cated, to the manufacture of matrices for typographs, and comprise more especially certain features of improvement disclosed in my copending application, filed August 21, 1914, Serial No. 857,868, (since issued into Patent No. 1,237,643, dated August 21,1917), for manufacture of matrices'for typographs,

of which the present application is a div1'-' sion. These features refer primarily to the method of gaging the depth of the strike Where such character-impressions are forme with the use of a punch. p

To the accomplishment of the foregoing and related ends, the invention, then, consists of the steps hereinafter fully described and particularly pointed out in the claim, the annexed drawing and the followin description setting forth in detail one mode of carrying out the invention, such disclosed mode illustrating, however, but one of various ways in which the principle of the inventionmay be used. i

In said annexed drawing Figure 1 is a vertical sectional View of the bed' of a driving press or punching machine adapted for the manufacture of matrices in accordance with my improved method; Fig. 2 is a perspective view of a blank matrixbar or plate; Fig. 3 is a similar perspective View of such bar after it has been punched; Fig. 1 is aperspective view ofthe punch; and Fig. 5 is a side elevation of a punched bar or late showing the method of gaging the stri e of thepunch.

The only portions of the general mechanism that require to be described, or even referred to, in the present connection are the bed 1 and punch head 7, these parts being -rela'tively reciprocablesoas t0 alternately advance and retract the punch B with respect to the matrix bar or plate A, shown as 1917. Serial No. 185,857.

held in operative position on the bed 1. The details of the mechanism whereby successive bars A may be brought in position for punching, and there held in the man nor Illustrated in the figure in question. form no part of the present invention. The same is true of the details of construction of th head 7 whereby the punch B is adjustablv supported to vary the depth of the strike as well as to properly locate it with respect to the matrix bar or plate A. A

The general form of the punch B eluploved .1n driving character-impressions into the blank matrix bars is indicated in Fig. 1 but shown in more detail in Fig. 1. From tlu' fsb figures it will be noted that the lower end K of the punch is formed to enter the recess (1 in the opposed edge of the matrix bar (see Fig. 2), such recess being a characteristic feature of the particular bars in hand. and

it being understood that the face ofthe punch may be changed in form to suit the rind of matrix bar. 1

There will, of course, be a different punch for each character, and the body of such punch will correspond in its cross-sectional 1' dimensions with those of the matrix, being just a trifle less, so that the punch may more freely in the well or recess in the bottom of which the matrix blank is held gripped between the chuck jaws. As a matter of fact, as explained before, it is the bed 10f the machine, with such chuck jaws and matrix blank, that are moved relatively to the punch, rather than vice versa, the range of movement being slight, since it is only necessary to lower the blank sulliciently to allow the punch to clear the recess a in such blank. and thus permit of the insertion of a second blank after the character-impression has been struck in the first.

,Theupward movement of the bed of the machine carrying the blank, is limited by the engagement of the fiat upper faces of the chuck jaws with a plate (30 secured to the under side of the head 7, and forming part of the means whereby the punch is secured to such head. I y

In order to adjust the depth of the strike,

since the bed and the head thus occupy a fixed relation at the end of the punching stroke of the press, it is necessary to provide for the vertical''adpistment of the punch. The plate 60, 111st referred to, isaccordingly slidably held in ways 61 in a second plate 62 directly attached tq the under side of the head, said ways inclining slightly to the horizontal, as indicated in Fig. 1. The firstnamed plate 60 is provided with an;undercut slot 63 adapted to receive and slidably hold block 64 of T-shape, to which in turn is attached the punch B by means ofa screw 65 passing through the upper end of the same, and the depending portion of such block 64. Obviously if the slidable plate 60 be moved along its supporting ways 61 in the other plate, the punch and its supporting block being held against such movement by reason of the engagement of the former in the Well 17 between the chuck j aws, such punch will be slightly raised or lowered, depending upon the direction of movement of said plate 60.

Such movement is effected by means of a threaded spindle 66 rotatably but longitudinally immovably held in a bracket 67 attached to the front face of the head 7. The outer end of such spindle is provided with. a hand-wheel 68' to facilitate its rotation, while the threaded portion thereof engages with an upwardly projecting arm 69 on the plate. By means of such screw and the slight angle of the ways, it will obviouslybe possible to secure a very fine adjustment of the punch vertically in the well, and thus obtain a strike of exactly the depth desired in the production of any given character impression. By providing a micrometer scale (not shown) in connection with the wheel 68, or other movable part associated with the adjustment of the punch, the correct position of. parts for any particular punch, once ascertained, can be readily returned to when the punch is used again, such correct position being empirically determined in the first instance. In other words, the character impression is struck in the blank matrix, and the depth of such impression is then carefully gaged by means of a suitable instrument, and the punch is thereupon adjusted, if necessary, until exactly the right depth has been obtained.

Although reference is thus made to the depth of the character impression, What I actually depend upon in manufacturing matrices withmy present improved mechamsm, is the distance between the bottom of such impression and the back of the bar.

In other words, I have found that it is much more advantageous to measure the drive from the back of the bar instead of from its face. This distance a (Fig. 5) being preserved accurately, the distance G between the front and back faces of the matrix bars may in turn be measured with reference to the same backs, and thus the as a minimum distance between such faceand back is preserved in the original blank. The displacement moreover of the metal on the face adjacent the impression due to the action of the punch becomes a matter of indifference, since this is corrected in the final operation of trimming the face.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the method herein disclosed. provided the steps stated by the following claim or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention The method of making matrices for typograph machines, and the like, which consists in driving a punch bearing a relief character into the matrix blank, gaging the depth of the strike with reference to the back of such blank, and then trimming the face thereof back to a predetermined distance from such back.

Sgned by me, this 9th day of August, 91

ARTHUR H. HEDLY.

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