US312870A

US312870A - Device for adjusting saw-fastenings

Info

Publication number: US312870A
Authority: US
Publication date: 1885-02-24
Anticipated expiration: 1902-02-24

Description

(NO' Model.)

A. J. LINTON 81; R. D. STEWART.

DEVICE FOR ADJUSTING SAW PASTENINGS.

No. 312,870. Patented Feb. 24, 1885.

Fig.1. WWW El H1 H1 Unites States Patent FFlCB.

ALBERT J. LIN-TON, OF SOUTH SAGINAWV, AND ROBERT D. STEXVART, OF SAGINAW MICHIGAN.

DEVICE FOR ADJUSTING SAW-FASTENINGS.

EIPECIPICATION forming part of Letters Patent No. 312,870, dated February 2 1-, 18815.

Application filed December 20, 1F8l.

To all whom, it may concern:

Be it known that we, ALBERT J. LINTON, of South Saginaw, and Rosnnr D. STEWART, of Saginaw City, allin the county of Saginaw and State of Michigan, citizens of the United States, have invented a new and useful Adj usting Saw-Fastening, of which the following is a specification.

Our invention relates to an improved adj usting saw fastening that is attached to the stiles of the sash of a gangsaw mill; and the objects of ourinvention are to so construct an adjusting saw-fastening that the pressure required to hold the saws firmlyin position will [5 act direct on the center of the width of the saws and sash-stiles, and one that will be substantial in construction and easily and quickly operated.

Figure 1 represents the upper part of the sash of a gang-saw mill hung with saws, showing the application of the fastening. Fig. 2 is aperspective view of the fastening secured to the stile of a gangsash, showing the movable barf. Fig. 3 is a longitudinal section through the center of the saw fastening, the dotted lines showing the face-plate g in position against the nut c.

Similarletters refer to similar partsthroughout the several views.

In the drawings, B and B represent the stiles of the sash of a gang-saw mill, connected by the top girt,A, and set with saws O O,hung with the saw-hangings E E, and separated by the gages D D, which are thin parallel pieces of iron placed between the saws to regulate the thickness of lumber to be sawed. The lower end of the stiles B and B are connected by a suitable girt to receive thelower ends of the saws O O.

The fastening is made of iron or any suitable material, and is fastened to the stiles B and B of the sash of a gang-saw mill by the clamping clip a, which extends around the stiles B and B and projects through the back plates b, and secured thereto by the nuts 0 c. From this clip at, extending inward toward the saws (l G, is a threaded tube, d, with an adjusting-nut, e, and from the center of the threaded tube cl, extending outward, is a 50 square bar, f, which is provided on its inner (X0 model.)

end, inside of the threaded tube d, with the flange m, which prevents it from being displaced therefrom, and on its outer end connected with the face-plate g, which is provided with a recess, h, to receive the lower end of 5 the saw hangings E. The bar f projects through a square hole in the face of the threaded tube (1, to prevent the face plate 9 from turning around when the nut e is being adjusted.

The fastening is secured at the top and bottom ends of the stiles B and B of the sash,directly opposite each other, in a line with the saw-gages D D, and perpendicular to the said stiles B and B, and when the nuts 6 and e are screwed up the saws C 0 will be held firmly against the gages D D, parallel with each other and at right angles with the sash and the feedrollers of the gang.

In using the fastening, the operator places it on the stiles B and B of a gang sash and secures it thereto in the manner described above, with the nuts 6 and 6 turned back against the clips a and 0t and the face-plates g and g against the nuts 6 and 6. Then the opera-tor screws up the nuts c and c, which forces the face-plates g and 9 against the first saw at each side of the gang-sash, (see Fig. 1,) and as the nuts 6 and e are continued to be screwed up the saws G 0 will be held firmly between the gages D D, and if narrow gages are replaced for wide ones the difference is compensated for by the lateral movement of the barf to and from the saws O O. The most accurate adjustment of the saws can be effected 8 5 by the manipulation of the nuts 6 and 6.

hen the operator wishes only to change the saws in the sash, the nut c is simply screwed back, which releases the pressure from the saws at one of the sash-stiles, B. The 0 saws can then be removed and others placed in, as hereinbefore described.

The fastening heretofore in use is fastened to the stiles of a gang-sash by two bolts passing through two plates, one on the inside and 5 one on the outside of the gang -sash stiles,

forming a grip around-the stile. The inner plate projects out beyond the said bolts sufficiently to receive two set-screws, with. small pins turned on their inner ends, which project through the face plate to hold it in position against the saws. The disadvantage of such arrangement is that the pressure of the setscrews is all on the outer ends of the two plates, causing them to bend from a straight line, and in consequence the set-screws bind on their threads. Our invention obviates this evil by the adjusting nut 0 being in a line with the center of the width of the stiles B and the saws C C.

Having described our invention,we claim- In an adjusting saw-fastening device, the combination of the externally-threaded tube (1, having an adjusting threaded nut, 0, there? on, for operating the face-plateg, and affixed to the outer end of the tube d. the clamping clip ayfor gripping the stile B,and the movable bar f, extending; from the center of the inner end of the tube d, and provided on its inner end with the flange m and on its outer end with the face plate 5 for operating with the saws 6, all substantially as described and shown, and for the purpose hereinbefore set forth.

ALBERT J. LINTON. ROBERT D. STEWVART.

\Vitnesses:

O. A. Moonns, W. R. llIARSHALL.