US288723A

US288723A - Gang sawing machine

Info

Publication number: US288723A
Authority: US
Publication date: 1883-11-20
Anticipated expiration: 1900-11-20

Description

(NoModell) I DJ. MURRAY.

, GANG SAWINGIMAGHINB.

$10,288,723. Patented Nov. 20, I883.

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I UNITED STATES P TENT Orrrcn.

DONALD J. MURRAY, or wAUsAU, WISCONSIN.

GANG SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 288,723, dated Novemlcer 20, 1883,-

' Application filed July 16,1883. x0 model.)

ence marked thereon, which form a part of this specification.

My invention is a gang cut-off machine for preparing slabs or bolts for sawing into laths, palings, and other similar articles, and embraces the following peculiar features: a sawframe table having the arbor-rails upon which the saws are each independently mounted upwardly inclined from front to rear; also, the said saws, being of any required uneven numher, are mounted in successive line and approaching pairs, commencing with the front and outsidepair until the single saw is reached,

which is placed in the exact middle and extreme rear of the table-frame; and, also, the single-bar links of the transfer-chains are each furnished with a fiat-faced, rear-pointing, and chisel-edged hook, all of which and their purposes are hereinafter more fully described,and illustrated by the accompanying drawings, in which the same letters designate identical parts of my invention in the different figures, respectively.

Figure 1 illustrates an end view of my sawframe, showing the inclined arbor-rails, the one each of two pairs of independently-mounted saws, and the single saw at the middle rear, together with the hook provided transferchain. Fig. 2 illustrates a plan view of the same, showingthe relative positions of the linepairs of saws and the timber-feeding transferchains. Fig. 3 illustrates both a side and top view of a section of transfer-chain.

The letter A represents my gang-saw frame, which is constructed of suitable length to mount at least three saws, although they may amount to any desired uneven number, and

with saw-arbor rails cl, upwardly inclined from the front to the rear sides.

The letters a a, b b, and crepresentthe gangsaws, numbering five, as herein shown. These saws are each'mounted 011 an independent arbor and placed as follows: The saws a. a, forming the first of said line-pairs, are mounted one on the outer side of each end arbor-rail, and set in line sufficiently back from the front edge of the table to allow a length of slabboard or other piece of bolt-timber to be placed on the chains in front of said saws. The next pair of saws, b b, are set in line about eighteen inches back of the line of the pair a a, and also at sufficientdistance within the said first pair to cut off equal and proper lengths of lath or paling bolts 5 and the last or fifth saw is set exactly in the middle between and also about eighteen inches back of the line of the last pair of saws, b b, to cut into two equal parts or lengths the slab which has just passed said saw.

The letters 0 andD represent, respectively, the double and single bar links of one of the transfer-chains,which travel, over suitable roll= ers, up the inclined saw-table to feed the timber to the saws.

The letter h represents the chisel edged hook, which is fastened into the top of each single-bar link of the transfer-chains, to catch the timber and carry it to be out, past the saws when cut, and over the upper side of the table. The inclination of the table also serves to hold the timber firmly against the hooks, and their chisel-edges and flat sides do not mar the surface of the timber like pointed ones are liable to do.

The operation of my machine is as follows: A chosen slab or board is thrown upon the table A, and, being caught by the hooks h on the transfer-chains, is carried by these up the inclined table against the firstline and outer pair of saws, a a, which trim off the ends of the saws are engaged at once, and, besides, the

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timber is never pushed off the hooks. Therefore,

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

1. In a frame-table, A, the arrangement of its saws,0f any uneven number and independently mounted upon the saw-arbor rails d, in successively and equally approaching and lateral line-pairs, commencing with the front and outside line-pair, a a, then the next line-pair, b b, and so on until the rearmost, middle, and single saw, a, is reached, substantially as and for the purposes herein specified.

2. The combination of the chisel-edged flatfaced, and rear-pointing hooks h of the transfer-chain O D with the lateral line-pair saws a a and b I), and the rearnlost, middle, and single saw, 0, independently mounted in the sawframe table A of a gang cut-off machine, as hereinbefore described, substantially as and for the purposes herein specified.

In testimony whereof I afiix my signature in presence of two Witnesses.

' DONALD J. MURRAY.

Witnesses:

WM. D. MURRAY, Gno. SILVERTHORN.