US77825A - warren shdmard - Google Patents

Description

@uiten ,grieten tat-rut @itiner- ARTHUR LYON, WARREN SHUMARD, AND JASPER NgROBBINS, OF GOSHEN,

' OHIO; i

l-Zetters Patent No.,7'7,825, dated May., 12, 1(868. 4

IMPROVEMENT 'in 'SAW-snr;

elle rlpnde maar in ia tiger etter 33mm :mr making tutti theme.' f r- TO WHOM IT MAY C ONCERN:

fBe it"known that we,'AnrHUn LYON, Wannen Summen, 4and JASPER Roni-sms, of Goshen,` Clermont county,t0hio, have invented certain new anduseful Improvements in Saw-Sets ;V und do hereby declarethefollowing` to be afull,clear, and exact description thereof, reference being had to the` accompanying drawings making part of this specification. i

Our invention relates tothat class of saw-sets in-wheh `the proper inclination, or, in other word-s, the ,set of'tbe teeth, is effected by a vertically-acting tool, which is operated by a hamuieror other suitable implement.`

And the first part of our invention consists in a siuiple and v,effective device formpartiug `'tbe inclination'to the teeth without injury thereto. l I l The secondfpart of our invention relates to a peculiar forni of anvil,` whose upper surface or' fece tapers toward one end, 'so as to be adjustable to suit saws whose teeth are broader or narrower 4attheir bases orjroots.

A represents the bedfplate of our instrument, having standards B B', which terminatein a head, C, and thelatter containsv the operating-tool or set-punch D,- o'f steel or other bard metal,fa1 1dthe lowerfnld of thiss'etpunch is tapered, as'shown, on opp'oste-sidesd d, sc as to terminate in a chiserl-point, whose direction of greatest `extension is longitudinal with the saw-set, for a purpose that will presently appear. i

" |lhe set-punch is brought into `its depressedor operating position bybeing struck on its upper end'by a mallet or hammer, and it is retracted by the spiral spring E, i.

The standards B Bare tapped, so"as to receive Athe set-screwsfj", and -the ends of these screws, whichV project through towards the set-punch, are provided withV stopsF F', and these stops should be O f brass, copper, or other soft metal, so as to prevent the saw-teeth becoming dulled,.when they impinge aghinst them'.

The stops are adjusted to or from' the standards, as occasion may require, by the set-screws ff;

'ihe anvil which receives tbe-impact of the set-punch, consistsof aber of steel, G,'-whose .lower portion is .confined within the longitudinal recess or groeven` ofthe bed-plate, andthe face of this bar, `insteadof being of` a uniform widthV throughout its entire lengtlnhas a tapering portion,.g,.for a purpose which will be hereafter described. 4'

4 One end of this anvil is confined within a yoke, H, and the anvil can -bc adjusted longitudinallyfin ugrcov, v a, and retained at any desired position by the set-screwh. AThis longitudinal zidjustnient is for the purposetof bringing any partei' the tapering portion g of the anvil immediately under tho centre of the set-punch.

Pvot'ed tothe yoheH at't' is a bar, I, which serves tosuppor-t the blade of the saw,.as'shown in fig. 2, and thisbar. is raised or lowered, so as toset the sawblade at a greater or less iuclination'by means ofthe adjustingi screw J. Projecting downwardly lfrom the bed-plate A is a stem, K, whiehenables the instrument torbevattuched to a bench or. table. Our saw-setris operated in the following manner:

The saw-blade is rst .laid upon the supporting-bar I, and the stops F F are'adjust-ed in such a manner that when the points ,of the saw-teeth are in contact with them, the base of the teeth will be directly under the centre of the set-punch. The anvil G will exactly correspond* in width with the base ofthe saw-teeth, Vand in ease' the saw has large teeth, the broadest part of the tapering anvil will be employed, but if the teethr should be small, the narrower part is used.l y

A blow isnow struck upon the pper end of the set-punch, and the tooth is ,se't at antangle, depending l upon the inclination of the-supportingfbar I, and if, after inspecting the saw, -it is found that the tooth has been set out too for, the bar Iis lowered until the exact pitch Vh'as been obtained, and, by'simply shoving the saw' along transversely 'of the anvil, and striking the set-punch asfast asveaeh tooth is brought `underli?, theopera.- tion is eilectedin the mosty rapid and uniform manner. A little experience willenable any person to set the p supporting-bar I at the proper inclination 'at once, thereby insuring u uniform set" to all of the teeth. The tapering portion ,q ofthe anvil being adjusted'so as to coineidewiththe width o f the baseofthe'tecth,

there is no danger of the et-punch injuring any of the adjacent teeth bystriking them before they are brought to restl upon the anvil.

`It will be seen that our chisel-pointed punch acts to strike only the base of the tooth, and thus' avoids the very injurious action of reducing the breadth of the tooths point incidentto the use of the'common punch.

We also bring the toothvto a more uniform and perfect setvthan dothose punches which strike liatly on the entire tooth.

We claim herein es new, and of our invention- 1. The chisel-pointed punch D d, so guided as to strikethe teeth `Aat their bases only. 2. The tapering anvil G'r g, adjustable to fit teeth of different widths, s explained. 3. The combination of the anvil Gr, supporting-bar I, punch D, and stops or gauges F Ff, substantially as and for the purposes setfo'rth.

' In testimony of which inj'ention, We hereunto set our hands. Y

` ARTHUR LYON,

` WARREN SHUMARD, Witnesses: JASPER N. Ef()BBIl\`iS.

Grno. H. KNIGHT; WM. Yosm.

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