US73338A - Improvement in swages foe saw-teeth - Google Patents

Description

'M//Nalohnson Swggefer/Sw Tee/b.

PATENTED' JAN 14 i869 @uiten faire gutem ffirr.

lIMPROVEMENT IN SWAGES FOB. SAW-TESTE.

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TOA ALL WHOM I'l MAY CONCERN:

Beit known that I, NELSON JOHNSON, of Jasper, in the county of Steuben, and State of New York, have invented a new and useful Swage for Saw-Teeth; and I do hereby declare the following to be a full, clear, and

enact description of the same, reference being had to the accompanying drawings, which are made a. part of p this specification.

This invention relates to setting or spreading the ends of saw-teeth, and consists, first, in the provision, o n the swage-stock, of notches or teeth, which operate in conjunction with similar notches or serrations on the shank-of the saw-tooth, to hold the latter to the swage-stock `and prevent it from being driven off of the supporting-dieby'the action oi` the hammer upon the stamping, striking-die; second, in the provision of means for adjusting the supporting-die, or equivalent means `for adjusting the bearing-point of the saw-tooth on the swage-stock, in order to adapt the swage to act with equal eiciency upon different teeth, or, in other words, to accommodatethefswa'ge to such irregularities or variations vin the teeth as are produced by filing and gnmming; third, in the'provision of a reversible supporting-die, having a convex or oval face capable oi" drawing out the point of the tooth endways or spreading the same sideways; fourth, in the provision of a spring-holder for the stamping orstriking-die, the latter being thereby constantly held to its work.

Figure l is a perspective view of a swage illustrating my invention.

Figure 2 embraces two views of the dies, the lines-ot' vision of the different views being'at right angles'to each other` Figure 3 is a perspective view of amodiiied form ofmy improved swage.

Similar letters of reference indicate correspondingparts in thevdierent gures.

In the drawings, A represents a .sewage-stock, and the die or pin upon which reststhe cutting-point'of the saw-tooth when under the action of the stamping or striking-die C. `The saw-tooth (which is indicated in red lines in fig. 1) is set between the pins D D' and E E, whereby it is held against lateral displacement when acted' upon by the striking-die C. If preferred, the saw-tooth maybe held against lateral movement by being set 1n suitable grooves 1n the swage-stock, lnstead or between the pms. The socket or aperture 1n the swagestock in which the swage-pin o'r die -B is placed, communicates with the rectangular opening F, which receives a wedge, G, which serves'to support said swage-pin. The position of the wedge G is regulated by means of a set-screw, H, s6 as to raise or lower the swage-pin and support the same in the required position to sustain the point of the saw-tooth. This adjustment of the swage-pin in relation to the front of the stock A, which serves as a bearing for the shank of the tooth under treatment, enables the swage to be applied with equal effect to diierent teeth, and to accommodate itself to suchrregularities ns are produced by ling and gumming. If desired, a stationary die, B, may b e employed, and the edge of the saw-tooth supported by a wedge, G, adjust able by a set-screw, H, within a dove-tailed opening, as shown in iig. 3. It will be observed that in the device shown in g. 3 the bearing-point (or wedge) for the shank of the saw-tooth is .adjusted or changed -in relation to the die B upon which the point of the tooth is hammered or swaged, whereas with the device shown in fig. 1 the same object is attained by the adjustment of the die or swage-pin Bin relation to the bearing-point on th stock. In either ease, theadaptation of the swage to diiferent teeth, and to variations therein, supplies a very important desideratum, and enables the instrument to be more-extensively and eiiiciently brought into r'equisii tion. The front of the swage-stock A is notched, as at a, and these notches are designed to engage with corre-1 spending seri-ations on the shank of the saw-tooth, as shown', to prevent the tooth from springing back, and

thus retain its point upon the supporting-die B when subjected to thc blows of the hammer applied to the stamping-die C. The notches a may either extendentirely across the front or face of the stock A, or be merely long enough to receive the serrations on thc saw-tooth. The supporting-de B,fig. 1, has an oval or convex face, as shown clearly in fig. 2. so that when it is in the position shown in iig. 1, it has the eiect to spread the point of the tooth sideways when acted upon by C. By .reversing the position ofthe die, e., by withdrawing the same, turning it onequarter round and tje-inserting it,) itphas the effect to draw out the point of the tooth endwise. The die B is held against turning, when in either position, by its square shank, which projects down-A ward into the opening F. The striking-die C is mounted in a spring-holder, Cl, adjustably attached to the stock by means of a set-screw, C2, and serving to keep the die `down to its work. The die C spreads the tooth some distance back from its cutting-edge, Aand thus causes it to make smoother work in sawing.

Having thus described my invention, what I claimheren as neiv,'a.nd desire to secure by Letters Patent,`is-

1. The provision of'notehes or teeth, a, on theswage-stock, to hold the notched or serrated saw-tooth against displacement, substantially as deseiibed.

2. The adjustable swagepin or die B, or its described equivalent, whereby the swege is made to accommodate or adapt itself to irregularities or variationsin the saw-teeth, substantially as'rdescribed.

3. VA i'evelsiblesuppuiting-die or sWage-pin, B, having a. convex or oval face,y in order to either spread the tooth sideivays or draw the saune endwnys, substantially as described.

4. The die or stamping-device C, in combination with the spring-holder C andadjusting-ser'eiv C2, substantizilly as and for the purpose set forth. I

To the above specification of my new and useful improvement in swages for saw-teeth,- I have signed my (hand, this 15th day'of July, A. D. 1867. l l

NELSON JOHNSON.

Witnesses:

J; E.A M. BOWEN, OQTAVIUB KNIGHT.

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