US76250A - Roche - Google Patents

Description

@eine tetra jatrnt @High D. W. ROCHE, OF lROCHESTER, NEW YORK, ASSIGNOR lTO HIMSELE AND J. P.-ROCHE OF SAME PLACE.

IMPROVEMENT IN SHINGIE-MAGHINES..

die rlgehiile nfnreh tu in tlgnse @hasta More mit mating pitt nf tige time.

TO ALL WHOM. IT MAY CONCERN:

Be it known that I, D. W. ROCH, of Rochester, in the county of Monroe, and State of New York, have invented certain new and useful Improvements in Machines 'for Sawing Shingles and Barrel-Heads; and I do hercby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification:

Figure 1 is a plan of myximproved machine.

Figure 2, an elevation of the same.

Figures 3, 4, and 5, detailed views, showing the operating parts of theplatform and carriage.

Like letters of reference indicate corresponding parts in 'all the figures.

My'improvement belongs to that class of sawing-machines in which the bolt or block from which the cut is to be made vrests upon a tilting-platform that rocks toset the angle of the cut, and from which platform said ,bolt or block is dogged' and carried forward to a horizontal circular saw. The invention consists-in the special arrangement of -t'ne operating parts connected with the tilting-platform and carriage, and lalso in so constructing the track for the carriage, in'moving up to and back from the saw, as to answeras the sawdust-discharge spout, as hereinafter set forth. l

As repriesehted in the drawings, A is a main frame, and B a carriage, which swings over it, moving around pivot a. The main franielhas a horizontalcircular saw, C, and a tilting-platform, D,.which latter supports the bolt or block from which the shingles or barrel-heads are' to be cut. The axis b, onwhich the platform turns, rests in open notches or bearings c c of the main frame, so as to beadjusted up or lifted out at pleasure. The up-aud-down adjustment of` the axis is accomplished by thumb-screws d d, resting beneath, as shown in fig. 2. At one end vthe axis 1s provided with a solid head, e, and at theopposite end it has a nut and washer, e', by

which means, when the proper adjustment of the axis is attained, it can be tightened or clamped by simply turning up thcnut. The outer end of the plat-form is provided with a projection,j`, g. 3, which is hinged to the platform, andwith which-connects a crank, This crank is inthe form'of a strap, which passes over an eccentric, h, having a bearing-'in theframe, so as to give the desired reciprocating movement to the platform. The crank-pin should be adjustable in av vertical slot in the projection or armf, so that when the platform is adjusted up or down in its bearings c a, the crank g may he equally adjusted in the opposite direction to compensate for the platform adjustment, and leave the eccentric-shaft in the same position, relative to the platform, as before; and notonly is the armj' hinged to the platform, to allow a free vibratory movement thereof, but the crank-pin. `has a slight turning movement in the crank, to'allow the armf to vibrate as much as necessary.. The eccentric, h, is likewise adjustable to any position around its shaft, Yas indicatediby the set-screw y, tig. 3. The object of this adjustment is. to vary the extent ofthe tilting movement by varying the height and depth to which the eccentric moves at tbe close ofeach semi-revolution of its shaft. This arrangementl always lowers one end of the platform just as much as the other, however much the extent of tilting movement variesa very essential desideratum, innrde'r to make the shingles ofuniform thickness at the ends. Other machines lof this class are defective in this respect. The outer end of the eccentric-shaft is provided with a pinion, 2, with which gears acog-wheel, 1, havingrigidly secured thereto a star-wheel, t', operated by the action of the carriage, asv

will be prcsentiy described. l

The carriage isprovided with two dogs kk', the first fixed and rigid'and the last movable forward and back. This reciprocating movement is accomplished by a screw, Z,-pvoted, at fm, to the head-block, andl passing through a circular n'ut, n, iig. 5, turning in.the end of the carriage. This nut has a' pinion, 3, with which meshes a cogwheel, 4, connected with hand-wheel o. By turning this hand-wheel, it will he seen that thenut'will move the screw, and consequently the head-block, forward or back as may be desired. In this manner the bolt or block from which the article is eut, is dogged and released. The hand-wheel o is located on thecarriage in the proper position for using it to move the carriage toward and from the saw; and the gearing between the hand-wheel and the nut isso proportioned that' whilev handling the hand-wheel to move the carriage forwardrand back, suficient turning movement is imparted to the wheel without releasing oi' changing the grasp of the hand to alternately dog and release the bolt, thereby making the whole operation simple, convenient, and expeditious. It is obvious that two screws may be employed, 'if desired., or the single screw might be attached rigidly to thc dog. The end of the carriage is provided with a projecting arm, ya, having hinged at its 'outer end a pawl, q arranged to fall to such a position that when the carriage is retracted or drawn. back, it will ystrike the upperl most spur r of th'e star-wheel z', as shown in iig'. 4, and throw it back to such an extent as to tilt the platform as heforefdescribed. When it is 'desired that the carriage should actwithout tilting the platform, (as in cutting barrel-heading@ the pawl g is simply thrown over into the position indicated by red lines in iig. 4, in which cuscit does not engage vvi'th spurvx i The action. of the machine, as above described,l will be readily understood. The bolt or hloclc is placed upon the tilting-platform, and if shingles are to bc cut the platform is tilted to the extreme of one position. In this condition the carriage is moved over the bolt, and the latter is iirmly dogged to the sume by moving up the head-block c. When thus secured, thebolt is swung up to the saw, which makes the desired cut. When the carriage has swung back over the platform again, the bolt is undoggcd andallowed to fall thereon. .At this moment the pawl q strikes the spurr and tilts the platform to the opposite position, and the bolt is in condition to be dogged again for anotherA cut, as before. y I

The great advantage in the above'described invention consists in the arrangements for operating the platform' and the flogging-device ofthe carriage. The dog moving freely ou the pivot m, adapts itseif readily to any incline of the end of the bolt without any change required by hand. The arrangement for opening and closing the dog is also of'a verysimple and effective character, and the action is accomplished by the right hand of the operator resting in the position necessary for throwing the carriage forward and back, so that he does not have to change his position or his hold. The vertical adjustment of the platform by the axis b, resting in the open `bearings of the frame, as described, enables the same to be adapted to any thickness of cut, or to be easily removed from the frame when desired. The employment of the strap g, passing over the eccentric, h, insures a. positive action to the platform'without fail.. Where the action of the-platform is accomplished simply by the reaction of a weight, it is uncertain in its operation, especially if the bolt-or blockis very heavy, or there is a great deal of friction. I employa sawdust-discbarge spout, G, as usual,` but I place it upon' the opposite sidov of the machine from that ordinarily employed, and revolve the saw in the opposite direction, whereby it has a tendency to draw the bolt in, instead of crowding back against'lit, as in the usual way of turning the saw; and furthermore elongate or extend it, as shown in fig. 1,'and provide it with a horizontal projecting flange, s, iig. 2. By thus extending the spoutQandproviding it with .the flange, it not only serves as the discharge for the dust,

l but also as a way to receive the friction-rollers t t of the carriage, as it is moved forward and back.

I am not aware that this ,arrangement has ever before been knciyn or used. I employ a guard, H, outside the saw, which is simply hung to the frame 'by hooks u u, as shown iniig. I. By this arrangement ,it can be readily` applied or removed. When removed, the saw can be easily detached by loosening it, and raising it up, and t en'drawing'it out.. .I am aware that a tilting-platform and reciprocating carriage have before been used in similar mannen-hut such, broadly, I do not claim.

vWhat I claimas my invention', and desire' tosecure by Letters-Patent, is-

The screw l, revolving nut n, and hand-wheel o, geared to said nut, all arranged and operating in connection with the movements of the carriage, substantially as` and for the purpose herein specified.

l In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

D. W. ROCEIF.

Witnesses:

R. F. Oscoor, J. A. DAVIS.

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