US8211A - Apparatus for punching- designs in - Google Patents

Description

; UNITED PATENT OEEICE- wM. fr. RUDD, or AMSTERDAM, vrnenvia.`

LArrAitrvrus FOR PUNCHING DESIGNS EIN SHEET METAL.

i ISpeccaton of Letters Patent No; 8`,21,1,dated` July 8, 185

To" all whom t mar/.concern e Be it known that I, WILLIAM T.` RUDD, of Amsterdam, inthe county Vof Botetourt the Stateof Virginia, have invented a new and lImproved Modeof Puncturing `Designs in Thin Sheets, of All Kinds lof Metals; and I do hereby declare that the following is `a full and exact description thereof, reference being had `,to `the accompanying drawings and to the` letters of reference marked thereon.` I y y Figure 1 is a view` of a frame containing two rollers through which the design puncturer, is run. Fig. 2, a view of a plate set with steel punches showinga star within anoblong square. Fig. 3, a leather bed or die, the cover ofthe plate, having the same gure on it.

Description cmd mode of construction.w To enableothers skilled in the art to make and use my invention, I will proceed to de scribe its construction and mode of operation in detail.`

Fig. 1: Ais a frame, of wood or metal, consisting of side pieces united at top and bottom by strong cross pieces. Near the middle, both front and back, are two rests running from sideto side of A. B B are two rollers. The lower one works on boltsl set in each end, and resting" in boxes square or round set in the sides of A. The upper one is "arranged in the same manner, with the exception of a handle to turn it on the right of A. The rollers are near the center of the sides of A with` space enough between them to permit the punctures to beirun` through. Any kind of a frame will answer,provided it is furnished with two rollers and rests as above described. I am not particular in' respect to this, and deem it unnecessary to `give any further description, but, will proceed to describe the parts of the drawings composing what I term a design puncturer.

Fig. 2: C is a plate of metal, or block of metal faced wood, of any thickness at pleasure, having one or two handles or without any. And punches set to show the figure of-a star within an oblong border. There are six holes near thehandle for the purpose of securing the leather, E, by flat bolts. D are punches of `tough steel rounding to a point or chisel shaped. These punches I set to represent stars, flowers, ships, scenery, &c. I also contemplate having them movable, and so that I can set them up to form any pattern, preserving them in their proper positions screw or screws, pressing `against `a plate of iron acting directly on `them, orotherw1se.E is `a piece of' thick leather`,vas long and as wide as itis intended to have `the plate orblock of metal "faced wooda The leather is laid on the top of the punches and the part near thehandle `(if` there lshould be one) lis secured by fiat bolts. The leather is run between the rollers which lower or under side. The leather die or `bedis now complete.,` e e Nature of my aoeaz'owThc `nature of my invention consists in leather beds or dies, in combination with a set of punches, for puncturing purposes, `when such set of punches andthe die, are used in connection with proper rollers, as in this instance.` The advantages of the leather are as follows: First, the leather is cheaper and more readily procured vin the country than lead plates. Second, the leather is more pliable than lead, or wood when rollers are used. Thirdly, the frequent bending or raising and closing of the leather, `will not breakf it 0E while it would lead. `Fourthly,the leather can be impressed with thel figure at one operation, while it would take several seconds to make each impression of the points of the punches, separately, by hand, in the lead. Fifthly, the

Ileather possesses an elastic property absotrouble.` `Furthermore, if lead was used between rollers, the pressure would be calculated to press it'out of proportion and cause it to require constant repair, which would be both expensiveand annoying. lThe leather,

as `experience has proven, is not injured by any amount` of pressure that is required to puncture sheets. Again, beds of plate lead,

will not answer for rollers, as great pressure will always crack them, this is a strong obE jection to its use with rollers. Leather, is

best fitted for the rollers, and any machine which obtains its power from any other source than rollers, must be larger and stronger (and more expensive) to withstand the additionalforce requisite to produce the puncturing. Seventhly, lead as well as wood, when used in verticalpressing for beds or dies, require the power to act instantly.

e e e5 leaves `the impression ofthe punches, on its Wood wears too soon and would require constant replacing. With leather, this is not t-he case, and, the pressure of the rollers' being applied to it gradually as it passes through them gives it the preference. And lastly, the leather has been on trial for siX months, and has been found to answer bet-ter than any other substance, while lead, or wood could not be used between rollers to advantage. The leather has its peculiar claims and advantages, and cannot be said to be a mere substitution, all other things failing to produce the same result when rollers were used.

Mode of operation of' the design, punie* turen-Sheets, of any kind of thin metals, are placed between the under part of the leather E, and, the upper part of the steel punches D. The leather die is then pressed down, or held at front by the right hand while the puncture is run through the rollers B, B.

The part of the die where it is secured to the plate C, is put under the rollers first. This holds the sheet (one being put in for puncturing at a time) firmly till drawn through by the revolution of the rollers. A little oil may be used to grease the under part of the leather, this assists the sheets to leave the punches without trouble.

What I claim as my invent-ion and desire to secure by Letters Patent, is,

The leather bed or die, in combination with a set of punches for puncturing purposes, when such set of punches and the die are used in connection with proper rollers substantially in the manner and for the purposes herein set forth.

WM. T. RUDD.

Witnesses:

W'M. HUToHIsoN, JAS. M. D. MOFFETT.

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