US1081362A

US1081362A - Engraver's transfer device.

Info

Publication number: US1081362A
Application number: US72387312A
Authority: US
Inventors: Isaac N Cassity
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-10-04
Filing date: 1912-10-04
Publication date: 1913-12-16
Anticipated expiration: 1930-12-16

Description

I. N. CASSITY. ENGRAVERS TRANSFER DEVICE.

APPLICATION FILED 0G1.4, 1912.

UNITED srnrns nrnnr OFFICE ISAAC N. CASSITY, OF TOPEKA, KANSAS.

ENGRAVERS TRANSFER DEVICE.

To all) "LU/MUM may concern:

Be it known that I, Isaac N. Cassrrr, a citizen of the United States, residing at To peka, in the county of Shawnee and State of Kansas, have invented certain new and use ful Improvements in Engravers 'llransfer Devices, of which the following is a specification.

My invention is a device for transferring an impression of an engraving from one piece to another so. that the latter piece may be engraved as an exact duplication of the former. This transfer is usually accomplished by inking or waxing the first engraving, taking an impression on a suitable platen, and then marking the second and subsequent pieces to be engraved by the platen so as to afford a guide for the en grave in making the second and subsequent engravings.

It is the object of my invention to effect this transfer by a simple operation; to provide a transparent platen, or diaphragm, so that the ink impression and the piece to be marked can be viewed from the back of the platen in order to enable the engraver to mark the piece in the exact position desired; to provide a device whereby the engraving may be enlarged or reduced; and to provide the parts, improvements, and combinations hereinafter set forth and claimed.

To attain these objects my invention comprises more importantly a transparent and elastic thin diaphragm which serves as a platen for taking the impression from the first piece and transferring it to the second and subsequent pieces, the enlargement or reduction being accomplished by stretching or slacking the elastic diaphragm after the ink impression has been taken oil from the first piece.

It also comprises such a transparent and elastic thin diaphragm with a suitable frame on which it is mounted and means for stretching the diaphragm. And it further comprises the details of construction, and the parts, improvements, and combinations hereinafter set forth and claimed.

In the drawings accompanying and forming part of this specification and in the description of the drawings 1 have shown my invention in. its preferred form and some modifications and what I deem to be the best mode of applying the principles thereof; but it is to be understood that, within the scope of the appended claims, I contemplate Specification of Letters Patent.

Application filed October 4, 1912.

Patented Dec. 16, 1913. Serial No. 723,873.

changes in form, proportions and materials, the transposition of parts, and the substitution of equivalent members, without departing from the spirit of my invention.

Figure 1 is a plan view of a device of the kind described, made in accordance with the principles of my invention, this being the preferred. form. Fig. 2 is a side elevation. Fig. 3 a side view of one of the brackets which support the rollers. Fig. 4- is a sectional elevation of the same (enlarged) on a plane indicated by the line 4t in Fig. 3. Fig. shows one of the rollers. Figs. 6 and 7 are views of the other bracket and the spring. Fig. 8 shows a modified form of diaphragm. Fig. 9 shows how the impressions are modified, enlarged and reduced by means of my device.

Similar reference characters indicate like or corresponding parts throughout the several views.

17 is a sheet of thin transparent and elastic material. Preferably it is thin rubber similar to that used by dentists for the rub ber dam. It is to be understood that in using the term transparent, I do not restrict myself to the use of material that is clear; but rather I refer to any suitable degree of transparency or translucency which serves the purposes hereinafter described. The rubber described, however, though not clear, is sutliciently transparent for my purposes and also has the requisite elasticity. This diaphragm serves as the body to hold. the ink in making the transfer. The first or original engraving is inked and all the ink caretlf'ully rubbed oil" of the surface so as to leave ink only in the engraved lines. The rubber is then applied to the engraving to take off the ink impression. If it be desired merely to effect the transfer without altering the size of the engraving, the rubber is applied to the second and subsequent pieces to be engraved while under the same tension as it was under when taking the ink impression off of the original engraving. If it be desired to eillarge the second or subsequent engravings, the rubber is stretched symmetrically, so as to enlarge the ink impres sion on the rubber, and an impression is then made from the rubber to the second or subsequent pieces to be engraved. To reduce the engraving, the rubber is stretched when taking olf the ink impression from the original engraving, and slackcd when apply ing the impression to the later pieces to be engraved. It will be understood that by stretching the rubber symmetrically in all directions from the center of the engraving, the second impression will be of uniform proportions with the first engraving, but larger; and that when slacked, the second impression will also have the same propor tions but will be smaller. By stretching the rubber only in two directions oppositely to each other from the center, the enlargement will be only in that direction, so that he engraving may thus be made of greater dimen sion in any one direction without altering it in any other direction. To facilitate the handling of the rubber, I prefer to use the device shown in Figs. 1 to 7.

Therubber sheet is made with the four straps 18. I provide a frame comprising a hoop 19, such as an embroidery hoop. Arranged equidistantly around the hoop are four pairs of

brackets

20 and 21. Each pair supports a roller or spool 22, which is provided at one end with a bearing pin 23 and at the other end with a round nut 24.- whose threaded stem is screwed into the roller and also forms a bearing in the bracket 20, the pin 23 having its bearing in the bracket 21. The end of the roller adjacent the bracket 20 is formed with a ratchet tooth 26 which is adapted to engage with the ratchet teeth .27 pressed out of the said bracket 20. The roller has lengthwise movement between the brackets sufliciently to permit the teeth to pass over each other. A spring 28 tends to force the roller toward the bracket 20 so as to keep the teeth engaged. The straps 18 are wound upon the respective rollers. and the ratchet teeth hold the rollers against unwinding under tension of the rubber. To stretch the rubber symmetrically, the straps are wound upon the rollers, either by applying the fingers to the rollers themselves, or by turning the nuts 24. To slack the rubber, the rollers are pressed slightly against the springs, so as to release the ratchets, when the straps may be unwound. By this device, the rubber may be handled easily and uniform and accurate effects secured.

In Fig. 8 I have shown a rubber sheet of square form with straps of webbing or other suitable material pasted or otherwise secured to the corners. This form is more economical than the first-described form and serves the purposes of my invention as well.

It is to be understood that with a suitable degree of transparency in the diaphragm, not only is the ink impression thereon visible from the back or upper side, but also the engraver can see the piece that is to be marked, and can mark it in the exact location desired. The impression may be made by pressing the inked rubber against the piece by the thumb or finger or any suitable tool or appliance. When suitable ink is used, many impressions may be made from one inking of the rubber diaphragm. It is also to be understood that the rubber also is flexible, the ink impression may be applied to other than strictly plain surfaces; thus, it may be ap plied to the bowls of spoons, to irregular knife, fork, and spoon handles, etc.

Nhile the device is designed especially for engravers use, it is also applicable to trans erring, enlarging, reducing, and altering ther things than engravings, as it can be .pplied to any ink or other suitable imiression, and the transfer can be made in he same manner as from an engraving.

In Fl, 9, I have shown at 50 an ink impression taken from the engraving or print I? and enlarged uniformly in all directions, the result of stretching the rubber in the frame. 51 is the same reduced in all directions. is elongated only in one direction. 13 made my applying the device at an angle of about 45 degrees and then stretching the rubber only in one direction.

What I claim is:

1. In a device of the kind described, the combination of a hoop, a series of pairs of brackets secured to, projecting outwardly from, and arranged equidistantly around, said hoop, a roller mounted in and extending between the brackets of each pair, one end of said roller being formed with a ratchet toot-h adjacent to one of the brackets of its pair and said adjacent brackets being formed with ratchet teeth engaging the first-named tooth, and said roller being mounted so as to have lengthwise movement between the brackets, a spring for each roller for holding said teeth normally engaged; and a thin transparent rubber sheet having a series of radially extending straps, one strap for each roller and wound upon the respective rollers, said ratchet teeth being arranged to hold the roller against unwinding under the tension of the rubber.

2. In a device of the kind described, the combination of a loop, a seri s of pairs of brackets secured to, projecting outwardly from, and arranged equidistantly around, said hoop, a roller mounted in and extending between the brackets of each pair, one end of each roller being formed with a ratchet tooth adjacent to one of said brackets of its pair, and said adjacent bracket being formed with a ratchet tooth engaging respectively, the first-named ratchet tooth; a thin transparent and elastic sheet having a series of pairs of radially extending straps, said sheet extending across the central portion of the hoop with the straps corresponding with and wound upon the respective rollers; and means for holding the ratchet teeth in engagement for holding the straps against unwinding.

3. In a device of the kind described, the

combination of a frame having a central opening, a series of pairs of brackets secured to said frame and arranged substantially equidistantly around said central opening, a roller mounted in each pair of brackets, a sheet of thin, transparent, and elastic material extending across said central opening and having a series of pairs of straps the straps in each pair extending in diametrically opposite directions, said straps being wound upon the respective rollers, together with means for preventing the unwinding of said straps from said rollers.

In a device of the kind described, the combination of a frame having a central opening, a series of pairs of rollers mounted in said frame equidistantly around said central. opening, the rollers of each pair being diametrically opposite to each other, a transparent and elastic sheet extending across said central opening and having radially ext-ending straps corresponding with and wound upon. the respective rollers, and means for holding the rollers against unwinding.

5. In a device of the kind described, the combination of a frame having a central opening, a series of pairs of rollers mounted in said frame around said central opening, the rollers of each pair being on opposite sides, respectively, of said central opening, a transparent and elastic sheet extending across said opening and having radially extending straps corresponding with and wound upon the respective rollers, and means for preventing the unwinding of said straps from said rollers.

6. In a device of the kind described, the combination of a frame having a central opening, a series of pairs of rollers mounted in said frame around said opening, the rollers of each pair being on. opposite sides, respectively, of said opening, an elastic sheet extending across said opening and having radially extending straps correspondingwith and wound upon the respective rollers, and means for preventing the straps from unwinding from said rollers.

7. In a device of the kind described, the combination of a frame having a central opening, a transparent and elastic sheet extending across said opening and having a series of straps extending radially with respect to the central portion, and a series of rollers mounted in said frame around said central opening and to which the respective straps are secured. and upon which they are wound, to stretch said sheet.

8. In a device of the hind described, the combination of a frame having a central. opening, a series of rollers mounted in said frame around said central opening, an elastic sheet extending across said opening and having radially extending straps correspending with and Wound upon the respective rollers, and means for preventing the straps from unwinding from said rollers.

In testimony whereof I have aflixed my signature in presence of two witnesses.

ISAAC N. OASSIIY,

lVitnesses J M. STARK, R. R. l n'rnnson.

topics or this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

Washington, .D. U.