US841656A

US841656A - Engraving-machine.

Info

Publication number: US841656A
Application number: US22321904A
Authority: US
Inventors: Walter Armstrong
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-09-03
Filing date: 1904-09-03
Publication date: 1907-01-22
Anticipated expiration: 1924-01-22

Description

No. 841,656. PATENTED JAN; 22,1901; W. ARMSTRONG. ENGRAVING MACHINE.

APPLICATION FILED SEPT. S, 1904.

4 SHEETSSHEET 1.

HHH H H- J nae/b3 017- rm: NORRIS PETERS c0, wasnmamu, n. c.

IND. 841,656. PATENTED JAN. 22, 1907.

W. ARMSTRONG. ENGRAVING MACHINE.

APPLICATION FILED SEPT. 3. 1904.

4 SHEETS-SHEET 2.

THE NORRIS PETERS 5a., WASHINGTON, u. c.

PATBNTED JAN. 22, 1907..

W. ARMsTRONG. I ENGRAVING MACHINE.

APPLIUATION FILED SEPT. 3. 1904.

4 SHEETS-SHBBT a.

Evy/"m7"; Was/Va ll I ll ll 1Il ILIII No. 841,656. PATENT'ED JAN. 22, 190v.v

w. ARMSTRONG. ENGR'AVING MACHINE. APPLICATION, FILED SEPT. 3. 1964 c0., WASHINGTON. n. c,

mvrrnn "erm ne WALTER ARMSTRONG, OF GHICOPEE, MASSACHUSETTS.

ENGRAVING-IVIACHINE.

Specification of Letters Patent.

Patented Jan. 22, 1907.

Application filed September 3, 1904. Serial No. 223,219.

To all whom, idly/(6 2] concern.-

Be it known that I, WALTER ARMSTRONG, a citizen of the United States, residing at Chicopee, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Engraving- Machines, of which the following is a speci fication.

This invention relates to engraving-machines, the cbject of the invention being to provide a machine of this character whereby a die may be cut from which letters or symbols for type-writing machines may be formed, the face of which letters shall be curved in the direction of their length or height to conform to the curved surface of the platen-roll of the type-writing machine. The die having been out, the type are produced therefrom by rolling relatively soft metal and the cut surface of the hardened die back and forth under-pressure against one another, and it has been found in practice that to produce a letter in this manner having sharply-defined edges and corners it is necessary to give to the die a curvature whose radius is substantially equal to'the radius on which the die and type have their rocking motion, as otherwise the type-metal will not fill all the corners of the depressions cut in the die.

A further object of this invention is, therefore, to provide means whereby the cuttingtool may operate in the direction of the height of the letter on a radius equal to that of the platen-roll and which may operate in a transverse direction to this on a radius which will give the desired curvature to the die or letter transversely of the latter. Provision may be made in the machine to vary this last-named radius; but the swing of the tool lengthwise of the letter is on a radius which is constant.

A still further object of the invention is to provide means in this machine whereby the die-block may be secured to permit the cutting therein of either upper or lower case letters in such a manner as to insure absolute accuracy of spacing between them vertically, to the end that the alinement of the writing produced by types made from these dies may be perfect.

In adjusting this machine to produce letters of various dimensions, the relation of the lengthwise and transverse radii one to the other does not change.

In its general principles the machine forming the subject of this application is of that type described in the patent to Benton, December 22, 1885, No. 332,990.

In the drawings forming part of this application, Figure 1 is a front elevation of a machine embodying the invention. Fig. 2 is a top plan View of the machine, considerably enlarged. Fig. 3 is a sectional elevation on line 3 3, Fig. 2, and on the same scale as that figure. Fig. 4 is a sectional elevation on line 4 4, Fig.2. Fig. 5 is a sectional plan view of a part of the machine, taken on line 5 5, Fig. 3. Fig. 6 is a perspective view of the dieblock holder, showing the manner of adjusting the die for cutting upper or lower case letters. Fig. 7 is a transverse section of the die-block on line 7 7, Fig. 4. Fig. 8 is a perspective view of a portion of the patternplate.

Referring to the drawings, a a are two standards whose upper ends are united by a rectangular frame b and the lower ends by a plate 0, which is the pattern-plate and a portion of which is shown in Fig. 8'. Between the upper ends of the standards a and adjustably secured thereto are the two legs e e,

which extend up through the opening in frame I) and are united by a cross-headf. To secure the legs 6 to the standards, the latter are slotted vertically, and screws 9 extend through the slots into the legs.

As shown in Figs. 2, 3, and 4, there are two rectangular frames 7L and 11 located Within the frame I) and inside of the legs 6 e. The outer frame it is supported in the frame I) by two pivot-pins or screws j, (see Figs. 2 and 4,) and the frame 4 is supported in the frame h by screws on pins 7c,rectangularly-arranged relative to the pins 7', the whole constituting a gimbal-frame construction, from the framed of which four rods m depend, one from each corner, the lower ends of which are united by a square plate n, from the center of which the stylus 0 extends downwardly to the patternplate 0. The stylus is provided at its lower end with a telescoping point q, a spring 1" serving to press the point against the plate 0 to hold said point in the groove of the pattern, (in this case a letter A,) as shown in Fig. 8-.

The cross-head f has an opening 8, preferably rectangular, through it centrally thereof, and the shank t of a work-holder carrier'or yoke 1) extends into this opening from beneath the head f and is pivotally supported therein on pins w, which are parallel with the pins 7', as shown in Figs. 2 and 4. Between the arms of this yoke the die-holding block is supported on pivots y, located at right angles to the pins This block is shown in perspective in Fig. 6 and in section in Fig. 7 and consists of a rectangular box open at the bottom, in which is located a solid block 3, in which in turn is placed the die-block 4, the latter being secured in said block 4 by a set: screw 5, the head of which is sunk beneath the'surface of the block.

When the die-block 4 is located in the block 3, the lengthwise dimension of the letters to be cut thereon will be. at right angles to the pivot-pins y, and the block 3 in the direction From the preceding description it is seen of the length of these letters does not fill the space within the block 90, and a plate 6, as shown in Figs. 4 and 5, is introduced between the block 4 and the interior wall of the block as. This plate represents the spacing re quired between the upper and lowercase letters to be cut on the die-block, and by shifting this plate from one side to the other of the block 3 the die-block may be correctly positioned relative to the cutting-tool. The block 3 and the plate 6 are secured in the block as by means of a set-screw 8. (Shown clearly in Figs. 4 and 7.)

that the rods supporting the stylus may be swung in any direction and that the yoke i) may swing in one plane only. The connection between the rods m and the yoke '12 is made through the block :0, and movement of the latter (and consequently of the die) is effected at the same time in a lane at right angles to that in which the yolfe swings, and to provide for these movements the block 00 is connected with the stylus-supporting rods m as follows: An outer frame 9 is provided with down-hanging sleeves 10 at each corner, through which the rods m pass, and inside of this frame 9 is another frame 12, supported in the frame 9 on pivots 13, parallel with pins y. Inside of the frame 12 is a third frame 14, supported on pivots 15, rectangularly disposed relative to the pivots 13, and other pivots parallel with the pivots 13 extend through the frame 14 into the sides of the block 00, the disposition of these frames and their pivotal supports being clearly shown in Figs. 3 and 4. Thus the frames 9, 12, and 14 constitute a gimbal-frame connection between the block as and the rods m, said frame connection being suspended from the block w by the pivots 15. Therefore if the screws 9 be loosened, the legs e may be adjusted vertically, carrying with them the yoke 12 and block at, supported therein, together with the gimbal-' frame connection between the block 00 and the rods m. Hence when the stylus is swung in the direction of the length of the letter to be cut the yoke 12 will remain stationary and the block a; will swing on its pivots, and when the stylus is swinging in a direction transversely of the letter to be cut the yoke '11 will swing onits pivots w and the block 00 will be rigid.

The die-block when in proper position is held in the block a: in inverted position over the point of a tool 20, carried at the end of a suitable spindle 21, rotatably supported in a small lathe-head 22 on one of the legs 6, which are secured adjustablyon the standards a, the spindle having a pulley 21 mounted thereon. The particular construction employed to adjust the tool and to easily remove the head 22 (to facilitate the removal of the die-block from the block 90) is illustrated in Figs. 3 and 5. This construction is considered entirely satisfactory; but another may, if desired, be substituted therefor. In the construction shown a block 23 is secured by screws 24 to the leg e. A sec ond block 25 is mounted on the first to slide lengthwise thereof, it being adjusted by means of a screw 26, mounted in a suitable bearing and engaging said sliding block. In the face of the latter is a longitudinally-disposed T-slot 27, in which the head of a bolt 28 enters, the shank of the bolt extending into the back of the head 22, as shown in said Figs. 3 and 5, and being there engaged by a vertically-disposed rod 29, provided with a camshaped'extremity 30, operatively connected with the shank of the bolt 28, whereby the rotation of the rod may clamp the head 22 at any desired point in said T-slot. Preferably the block 23 and the block 25 are provided with

projections

31 and 32, located behind the screw-rod and having a spiral spring 33 interposed between them, whereby the adjustment of the block 25 upward will take place against the resistance of said spring.

In the block 25 is a pin 35, which extends into the path of movement of the head 22 whereby if it becomes necessary to remove the head for any reason while a block is being cut it may be replaced in the same position relatively to the work that it previously occupied without disturbing the adjustment of the screw.

The pattern-plate c has cut therein the letter or other symbol it is desired to reproduce on a reduced scale. The cut or groove forming the letter is V-shaped in cross-section, as shown in Fig. 8, the point of the stylus following the bottom of the V. The tapered point of the cutting-tool 20 produces the requisite flare of the sides of the reproduced letter or symbol in the die-block.

To adjust the machine to vary the dimension of the letter in the die-block relative to the pattern-letter, the screws g are loosened and the legs 6 e raised or lowered, thus locating the die nearer to or farther away from the pattern-plate, all of the parts supported on the cross-head f sliding up or down on the rods m.

It will be noted that the central portion of IIO the cross-head f extends downwardly on each side of the yoke and has the holes w therein. These are provided should it be desired to change the radius on which the yoke 15 may swing in a direction transverse to the length of the letter to be cut, the

change being effected by dropping the yoke and shifting the pins to to one of the holes to. This of course necessitates the like shifting of the tool-carrying head. If the yoke 11 were rigidly secured in the frame, the machine would still be operative to out a letter which would be curved inthe direction of its length, and while for general use the efficiency of the machine would be impaired for certain work it would be quite as eflicient as though the yoke 1) were free to swing, as described, in a plane at right angles to the plane of oscillation of the die-holding block 9:.

Having thus described my invention, what 1 claim, and desire to secure by Letters Patent, is

1. In an engraving-machine, a suitable frame, a pattern, a stylus arranged in operative relation to the pattern and supported to have its tip swing in a horizontal plane, a cutting-tool, a work-holder carrier having a pivotal support, a work-holder having a pivotal connection with said carrier at right angles to the axis of said pivotal support, an

&

operative connection between the workholder and the stylus, and means for lengthpattern, a stylus operatively arranged to the pattern and having a gimbal-joint support, a cutting-tool, a work-holder carrier having a vertically-adjustable pivotal support, a work-holder having pivotal connections with said carrier at right angles to the aXis of said pivotal support, and a gimbal-joint connection between the stylus and the Work-holder below said pivotal connections.

3. In an engraving-machine, a suitable frame, a pattern, a stylus-carrying frame having a gimbal-joint support, a verticallyadjustable work-holder carrier supported to swing in one plane, a rotary cutting-tool having a supportcorrespondingly adjustable to that of the work-holder carrier, a workholder having a pivotal mounting on the carrier at right angles to the axis of said swinging movement, and a gimbal-joint connection between the work-holder, and the stylus-carrying frame.

WALTER ARMSTRONG. Witnesses:

WM. H. OHAPIN, M. L. DONOVAN.