US326685A - Insertible-tooth saw - Google Patents

Description

(No Model.) G. F. SIMONDS.

INSERTIBLB TOOTH SAW.

- No.4 326,685. Patented 861112.22, 1885( JNVENTOH W/ TNESSES,

Parras. mmnmmpm, wnhingm n. c.

UNTTa TaTns aTnNT lNSERTlBLE-TOOTl-i SAW.

SPECIFICATIOI" forming part of Letters Patent 1\'l'o- 326,685, dated September 22, 1885.

Application filed July 7,1885.

To all whom, it may concern:

Be it known that I, GEO. F. SrMoNDs, of Fitchburg, in the county of Torcester and State of Massachusetts, have invented certain Improvements in Inserted-Tooth Saws; and I hereby declare the following to be a full,clear, and exact description of the same, reference being had to the accompanying drawingsnnak ing part of this speciication, in which- Figure l is a side elevation of a portion of a saw-plate provided with the improved inserted tooth. Fig. 2 is a side elevation of a section of a saw-plate with the tooth and gullet removed. Fig. 3 is a perspective view of the removable point. Fig. 4 is a perspective view of the removable gullet. Fig. 5 is a crosssectional view on the line x x of Fig. 1.

My invention relates to that class of inserted-tooth saws wherein the point is secured to the saw-plate by means of a removable gullet sprung into the recess in the plate, and has for its object to so strengthen the removable gullet that it may be made narrower than heretofore with safety, and thereby enable me to increase the size of the pocket or space within the gullet for carrying the dust, and at the same time broaden the face of the gullet and tooth, so as to make proper clearance in the out or kerf.

In the respects named my present invention is an improvement on the invention described and claimed in an application filed by me'April 22, 1885,Serial No. 163,032.

In order that those skilled in the art may makeand use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings, A is a section of a saw-plate provided with the recess B, for the reception of the removable gullet and tooth, the said recess being cut in the arcs of two circles of different radii,but struck from about the same center. The removable gullet C has its rear edge grooved at a to fit over the beveled edge a of the recess B, and its body b is made of a thickness greater than the thickness of the saw-plate, while each exterior rear edge is beveled off, as seen at d d, so that the lowest lines of the beveled edges are coincident with the plane of the saw-plate when the gullet abuts against the plate. The in- (o model.)

serted point D is provided with a swaged cutting-edge, c, as is usual in such cases, and has its body formed with a thickness of metal greater than the thickness of the saw-plate, but equal to the thickness of the body b of the removable gullet C. The rear exterior edges ofthe point D are beveled, as seen at i t', so that the lowest line of the bevels are coincident with the planes or faces of the saw-plate when the point is set. rI`he rear edge of the point is provided with a groove, l, to t over the beveled edge l of the recess B. The base of the point when inserted and in place rests against the projection n, cut in the saw-plate and connecting the two arcs in which rest the bodies of the removable gullet and tooth.

By means of the construction of tooth and gullet described and illustrated I am not only enabled to manufacture them at a less cost than heretofore, but the weight of metal obtained by thickening the body of the tooth and the body of the gullet enables me to increase the interior curve of the gullet, and thereby increase the size of the dust-carry ing pocket, and yet maintain the requisite strength necessary to the successful working of the saw, every fraction of increase in the size ofthe dust-carrying pocket being of the greatest value inv the perfection of work performed by a circular saw.

I am aware that heretofore the workingfaces of removable gullets and removable teeth for circulaisaws have been swaged to a dimension greater than the thickness of the sawplate; but in such cases the strength of the parts has not been so increased as to have them narrower, and thereby increase the size of the gullet or pocket materially, as is the case with my invention.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is-

l. The removable gullet C, having its body thicker 'than the saw-plate, in combination with a recessed saw plate and tooth, substantially as described.

2. The removable gullet C, having its body thicker than the saw-plate and its rear exterior edges beveled, as shown at d d, in combination with a recessed plate and a tooth, 'for the purpose set forth.

IOC

3. The removable tooth D, having its body nation with a holding device and a recessed thicker than the saw-p1ate,as speciied,in comesew-plate, substantially as set forth. bination with a holding device and a. recessed plate, as described. 5 4. The removable tooth D, having its body Vitnesses:

thicker than the sawplate and its rear exte- ALoNzo H. STEWART, rior edgesv beveled, as shown at z' z', in combi- CHAs. S. HAYDEN.

GEO. F. SIMONDS.

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