US267353A - Machine for notching and trimming electrotypes - Google Patents

Description

(No-Model.) I Z'Sheets-Sheet 1.

0. M. LETZ.

MACHINE FOR NOTGHING AND TRIMMING ELEG'TROTYPES.

- Patented Nov; 14, 1882.

N PETERS PhMo-kRMgmphw. Washington. D. c.

UNITED STATES PATENT @EETQE.

CHARLES M. LE'IZ, OF CHICAGO, ILLINOIS, ASSIGNOR CF ONE-HALF TO A. ZEESE & (30., OF SAME PLACE.

MACHINE FOR NOTCHING AND TRIMMING ELECTROTYPES.

SPECIFICATION forming part of Letters Patent No. 267,353, dated November 14, 1882,

Application filed June 13, 1882. (N model.)

To all whom it may concern Be it known that 1, CHARLES M. LETZ, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Machines for Notching and Trimming Electrotypes; and I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, whichform a part of this specification.

This invention relates to machines for trimming, squaring, notching, and shaping the edges of electrotype-blocks; and it has for its object to produce a machine in which such work can be performed with facility and accuracy.

Therefore my invention consists of the novel devices and combinations of devices hereinafter described and specifically claimed.

In the accompanying drawings, Figurel represents a front elevation of the machine having my improvements; Fig. 2, a plan view of the same Fig. 3, a vertical cross section on line y y in Fig. 1; Figs. 4. and 5, an elevation and plan view of the cuttergage detached; Fig. 6, a sectional view on line a; m in Fig. 3; Fig. 7, side and edge views of the cutter-tools by me employed in this machine, and Fig.8 a detached plan view of the adjustable gage-bar and angle-bar on top of the table and the clamp for securing a brass rule to be mitered.

Corresponding letters in the several figures of the drawings designate like parts.

A denotes'the frame of the machine, which is preferably made a solid casting of four legs, that are connected by longitudinal and cross bars and plates in a manner-to combinelightness with strength, and upon the top of this frame I rigidly secure an iron plate, B, which forms the base plate for the spindle-head C. This spindle head C is shaped somewhat like a lathe head, having journal boxes or a, in which the spindle cis pivoted, each journal-box being provided with an oil-cup, b, for supplyin g the lubricant to the spindle in uniform quantities. A flanged pulley, D, is mounted upon the spindle 0 between the journalboxes at a, and a cutter-head, E, is secured upon the overhanging end of such spindle c.

The cutter-head C consists of a sh allow disk, that is notched out from two opposite sides, so as to have two segmental wings. A rectangular slot is cut in each wing, that is diagonal to the radial line, and in each such slot is inserted a cutter-tool, d or e, which is adj ustably secured therein by a set-screw, f.

The front side of frame A is formed with a vertical plate, 9, having to its edges dovetailed guides 71, one of which is cast solid with the frame and the other one is adjustably secured thereto by screw-bolts, and between such guides h is fitted the vertically-sliding support F for table G.

To the bottom end of support F is pivotally connected the end of lever H, which at about its middleis suspended to an extension, i, of frame top plate B by a link, K, and that carries on its opposite end a balance-weight, I. A pedal-bar, L, is pivoted in a standard, K, that is secured upon the'floor, and its end is pivotally coupled to the forward portion of lever H by a connecting-bar, L, in a manner that table G will be raised by depressing the pedal L. The table Gis planed to be perfectly horizontal, and has a notch, l, ofjust sufficient width and length to clear the cutters d or e of the rotating head E, so as to provideas much supporting-surface for the electrotype-block as possible, and to prevent the wood backing from breaking out While being notched or trimmed. also has a dovetailed groove, in, that is planed transversely therein, or parallel with the face of cutter-head E and notch l. A bar, 02, is fitted in groove m, having a set-screw, 0, by which to secure it at any desired position. A bar, M, that is L-shaped in cross-section, is rigidly secured to barn, so as to rest upon table G longitudinally and to be rectangular to the face of the cutter-headE. This bar M has guide-heads j to its ends, that are'fitted to slide in the end edges of table G and to insure a parallel movement of such bar M.

Upon the L-shaped bar M is fitted an anglebar, N, that also rests upon the table G, is rectangular with bar M, and slides thereon longitudinally. A block, 0, also fitted upon bar M so as to slide thereon, is made rigid with such bar at any desired position by a set-screw, p. In a projeetin g lug of this block 0 is journaled The table G an adjusting-screw, q, having a hand-wheel upon its end, and the screw-threaded end of this screw q enters the screw-threaded lug of an gle-bar N, so as to move the same longitudinally any desired short distance.

A block, 12, that carries a thumb-screw, r, is fitted in groove on, and is secured at any desired point by a set-screw, 8. By means of the screw 1, the bar n, and therewith the bar M, can be adjusted laterally in a manner that an electrotype-block is held to the exact position relative to the cutters d or 0, so as to rest upon the table G and with one edge against the bar M, while its other edge is in contact with the angle-bar N, which can be adjusted longitudinally.

For adjusting the longitudinal bar M and the angle-bar N to bring any electrotype in proper position to the cutter d, a reversible gage-plate, P, that is of the exact width and shape of the cutters, and which has a sleeve, is adjustably secured by a set-screw upon an arm, t, which is rigidly mounted upon the end of a cylindrical rod, Q, having a knob-handle, a. This rod Q is pivoted in sleeve-bearings 'v c, that are secured against the spindle-head G, and a coiled spring, W, is interposed between arm 15 and bearing 0 upon rod Q, which will push such rod Q and gage 1? toward the cutter-head. A short feather, 'w, is fixed to rod Q, that will engage with either one of two diametrically-opposite notches in bearing a, so as to permit a semi-revolution of the gage-plate 1?, and to lock such gage-plate at either one of its two extreme positions. For the rearward position the notch is shallow, but with turning the gage forward by first disengaging the feather w from the rear notch such gage-plate is swung forward without touching the cutter-head and cutters until reaching the front notch in bearing 2;, that is cut a sufficient depth for the spring to push the gage-plate P under andjust in line vertically with the cutters d or 0, so as to indicate on the electrotype that is placed below such gageplate the exact outline of the cut that is made. By its peculiar attachment this gageplate P can be swung forward or backward while the cutter-head is rotated without coming in contact therewith.

The cutter-head E is incased at its sides, rear, and top, by a box R, the overhanging front end of which is connected by a hinge, so that it can be opened. This box will catch the chips, which will dump into a chamber, S, that is formed inside of frame A, whence these chips may be removed from time to time, or spouted into a suitable receptacle that may be arranged under the machine.

The operation of the machine is as following, to wit: An electrotype-block, Z, that is to be'notched or trimmed is placed upon the table G, with two of its edges against the bars M and N, which are adjusted by swinging gage I to hold such electrotype at the proper position relative to the cutters. The cutter-head being imparted a fast rotating movement, the table G is raised by depressing the pedal L until such electrotype has been passed vertically by the cutters. In Fig. 8 a device is shown for cutting and mitering brass rules in this machine. For this purpose a clamp, T, is fitted over bar M, the rear flange of which (that is to hold and grasp the ruler) is slotted out, and a set-screw, y, is tapped through the front flange for drawing such ruler against the rear face of bar M. The cutter-tools, having a pointed or diamond edge, are secured into the cutter-head E, and the angle-bar N is employed as a gage for regulating the exact lengths the bars 2 are to be cut. The table G being raised slowly by the pedal, a triangular groove will be cut, that will sever the rulefs at the proper line and will miter their ends at the same time.

As will be seen, the entire machine is simple in its construction, is arranged for fine and ready adjustment, and will perform very exact work with expediency.

Vv'hat I claim is- 1. In machines for notching and trimming the edges of electrotypes, the rotating cutterhead E, provided with slots for holding outters d or e byset-screws f,in combination with the vertically-sliding table G,having slot 1, all substantially as and for the purpose set forth.

2. In machines for notching and trimming the edges of electrotypes, the rotating cutterhead E, in combination with the "erticallyguided table G, suspended to the top plate, B, of frame A by rod K and lever H, having counter-weight I, and being elevated by a treadle, L, and rod L, all substantially as and for the purpose set forth.

3. In machines for notching and trimming the edges of electrotypes, the rotating cutterhead E, in combination with the verticallysliding table G, provided with slot land groove m for guiding and holding the longitudinal gage-bar M, having cross-bar a and set-screw 0, all substantially as and for the purpose described and shown.

4. In machines for notching and trimming the edges of electrotypes, the rotating cutterhead E, in combination with the vertically sliding table G, provided with slot Z and dovetailed groove m for guiding and holding the longitudinal gage-bar M, that has cross-bar n and set-screw 0, and forms the guide for an angle gage-bar, N, all substantially as and for the purpose set forth.

5. The vertically-sliding table G, provided with dovetailed groove m for bar 1;, that has adjusting-screw 1' and set-screw s, and for bar n, secured to longitudinal bar M, and having set-screw 0, all substantially as and for the purpose set forth.

6. The combination,with the table G and laterally-adjustable gage-bar M, of the angle-bar N and block 0, both sliding upon bar M, such block 0 being provided with a set'screw, p, and both bar N and block 0 being connected IIS substantially in the manner and for the purpose set forth.

In testimony that I claim the foregoing as my invention I aflix my signature in presence of two witnesses. 15

CHARLES M. LETZ.

Witnesses:

H. HUEHL, v R. G. ScHMIn.

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