US12813A

US12813A - John t

Info

Publication number: US12813A
Authority: US
Publication date: 1855-05-08
Anticipated expiration: 1872-05-08

Description

` To all whom t may concern.: l

\ i ffBe it known `that I,Jo1n T. BRUEN, of 1the'city, county, and Stateof New `York, `have invented certain Improvements in Sawthe figures.: y y The` section `ofi the saw plate as repre-` sented in the `accompanying drawing is se- "cured in the crossheadfof the saw frame by "f1 a hook (d) in the ordinary manner to which reciprocating motion` is given by means of` "a crank or other machinery. The body of lthe saw plate (at) Visformed of woven wire `or metal strips, thecross wires of which are made to sustain a metal strip (b) with a corrugated edge, which is firmly secured' at one l fend" tothe clamp, and at the other end is ystrained by a pin (c) socketed into the hook fiand held by a clamp nut as shown in the f drawing.,` Bythis means the cutting edge can be `readily renewed when necessary. The warpisfso `protectedby means of the y corrugated llingeor cross wires as to `be out ofreach ofwear, and the kerf formed by "the edge, or the `corrugated `metal strip (b) issuiiciently wide toyprevent undue friction onthesides of thesaw plate.

Atmodificationof this device is `shown in Fig; 3 at1(a1 a) representing blocks of lead.

JOHN T. zBrtUnN,` or NnwYonK, N. Y.

7 Sirona Ann MARBLE SAW. l

l i. Specification of Letters Patent No.` 12,813, dated May 8, 1855.

`Platesfor Sawing Stones, &c., in the operawtionof which `it is important that the saw j be properly suppliedwith sand and water, *(forwell known reasons!)` and to facilitate `the free Ipercolation of this gritty medium" under the edge `of the saw-plate' is `the :de-

` sideratum in the operation of sawing stone.` UThisI have `accomplished by means of a weve or `waved body of` a saw-plate. .The "followingis a full and exact description "thereof, reference being `hadto the accom` Ipanying drawings, making part of this lffspecilication, in whiche- 1 .il vie`w.` `1 Fig. `3, representation @ofthe modi ffication hereinafter described wherein lead `is used." Y

`The same letters indicate like` parts in `all with spaces between, or aband of lead, withl l indentationsffw cv) at intervals on the sides C and edge, attached to edge of the woven blade as at (bf 12') Fig. 8, so as to freely admit `the"sand,"c;,and bring itdown at l "once upon the point to be cut,\by` which a "much greater effect `is; produced thanyby any known inode. These devices are strained by hoops and frames, and used in the ordinary way, by any of the machines now operatingwithout any change but the saw blades.

The warp of which the body of the saw `plate is composed I secure at one end in any appropriate manner, and proceed in lling thesame with'corrugated cross wires to any required length. I then take the two `end plates (m) the inner surface of which is channeled crosswise like a rasp, and place one on each side' of the `saw plate, thus forming a clamp which when riveted or otherwise -held together, will rmly hold the warp, which may be turned or twisted in the groove formed at the end of the clamp, (g) Fig. 2, and at (r) Fig. l, to prevent the possibility of being drawn out when stretchedby the hook (d). i

. I contemplate another` modification of my device by corrugating the saw blade in such a manner asto admit the free passage of `the grit on the sides, the sharp angles of which will be protected in the indentations ing the corrugation.

I do not wish to confine myself to the preoise mode of application or devices above described, whichmay bevaried, according to circumstances and experience.

Having thus fully described my improved saw plate, for cutting stone, I do not claim the using of sand and water or other grit with a plain metal plate as new, nor the blade with grooves cut in it: but

What I do claim as my invention, and for which I desire to secure Letters Patent isl. The making of the body of the sawv plate,- of woven wire or strips of metal, or any analogous device for the purpose of ad- `mitting the free passage of the grit in the operation of sawing stone, substantially and for the purpose as herein described.

2. I also claim in combination with the both its sides through the indentations as abovedthe waved cutting edge, o; any analoabove set forth. gousevce substantiall and or the purpose hereindeseribed. y JOHN T BRUEN' 3. I also claim forming the edges of the Witnesses: saw blade thicker than to central portion so THos. E. WARREN, as to admit the free passage of the grit on L. E. HOPKINS.