US312205A - Half to byeon wintebs - Google Patents

Description

(No Model.) 3 sheets-sheen 1.

J. H. HULBURT.

DRAG SAW. No. 312,205. Patented Peb. 10, 1885.

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J. H. HULBURT."

DRAG SAW.

Patented-Peb. 1o, 1885.

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(No Model.)

J. H. HULBURT.

DRAG SAW. No. 812,205. Patented Peb. 10, 1885.

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JAMES H. HULBURT, OF BLANCHARD, MICHIGAN, ASSIGNOR OF ONE- HALF TO BYRON VINTERS, OF SAME PLACE.

{JPECEFCATION forming part of Letters Patent No. 312,205, dated February l0, 1885.

A pplicalion il'cd September 11), lSMl.

To all whom, it' may concern;

Be it known tha-t I, JAMES H. HULBURT, of Blanchard, in the county of Isabella and State of Michigan, have invented certain new and useful Improvements in Drag-Saws; and l do hereby declare that the following is a full, clear, and exact description ot' the invention, which will enable others skilled in the art to which it appertains to make and luse the same, reference being had to the accompanying drawings, which forni a part of this speciiication, and in which- Figurev l is a side view of my improved drag-saw complete and ready for operation. Fig. 2 is a longitudinal vertical sectional view of the salue. Fig. 3 is a top view. Fig. 4 is a front view, and Fig. 5 is a perspective detail view of a portion of the machine.

rlhe saine letters ret'er to the saine parts in all the figures.

This invention relates to that class ot'woodsawing machines which are known as drag saws;7 and it has for its object to provide a device ot' this class which shall possess superior advantages in point lof simplicity, durability, power, ease ot manipulation, and general etiiciency.

Vith these ends in view the invention consists in the improvedl construction and arrangement of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, A designates the frame of my improved sawing-machine,which consists, essentially, ofthe sills B B, having nprights C C and D D, respectively, at the front and rear ends, and a pair of parallel longitudinal beams, E E, connecting the uprights C C and D D. The latter are also provided with a transverse cap-piece, F, at their upper ends.

The beams E E are provided with suitable boxes or bearings for. a transverse shaft, G, the ends of which are provided with heavy wheels H H, having cranks or handles I, by means of which the machine may be operated by hand-power. One end of the said shaft is also provided with a band Wheel or pulley, J, to receive a belt or band, whereby the machine may be run by motive power of any suitable kind-for instance, by horsepower.

(No model.)

The shaft G is formed or constructed with a pair of cranks, K K, extending in diametria pair ot' togglelevers, M M2, are pivoted.

Two of these, connected, respectively, to the upper and lower pitman, and designated by letter M, extend in a forward direction, and are pivotally connected with the ripper and lower ends of a lever, N, which is fulcrumed to a bracket, O, extending inwardly from one of the side beams, E, of the machine. The toggle-levers M'5 extend rearwardly and are pivotally connected with an arm or bar, P, hinged or pivoted to the under side ofthe cap-piece F ofthe machine. Said bar is provided with a series of holes, Q Q, inwhich the connecting-bolts R R are adjustable, for the purpose ot' regulating the distance ofthe pivoting-points of the togglebars M2 from the fulcrum of the swing-bar l?.

S is a beam or bai-,pivoted tothe inner side of one ofthe uprights D, and provided at its front end, on its outer side, with a plate or staple, T, iitting and sliding over a vertical arm or guide, U, secured to the under side of one of the beams E, and having at its lower end a stop, V, serving to limit the downward movement of the said bar S. The latter is provided on its inner side with a plate, NV, the upper andlower edges of which form bea-rings i'or a slide, X, provided with iianges Y, that catch over the said edges, as shown.

To com ensate for wear lat-es Z are in.

serted under the upper flanges, Y, which latter are provided with set-screws A, by means of which the said wear-plates may be tightened against the upper edge of the plate W`.

The inner side of the slide X is provided with a pin or stud, B, forming a bearing for the front end of a connecting-rod, C, the rear end of which is pivoted adj ustably to thelower end of the swing-bar l).

To the front end of slide X the saw D is secured by bolts and nuts or in any other suitable manner.

One ofthe frame-beams E is provided with an upright, E', to which is pivoted alever, FQ having a tooth or catch, G', adapted to engage any one of a series of ratchets, H', upon an IOO upright, I', mounted upon the beam E in front .for the purpose of entering it accuratelyin the of the upright E'. rlhe said upright I' is provided at its upper end with a pulley, J', over which passes a rope or chain, K', one end of which is attached to the lever F near the front end of handle of the latter, and the other end of which, after passing over the pulley J', is attached to the pivoted beam or bar S, the front end of which has the reciprocating slide or bearing for the saw. It will be seen that by this mechanism the front end of the pivoted bar S, with the saw, may be raised to and retained at any desired elevation without regard to whether the saw at the time is in motion or not, thus enabling the material which is to be sawed to be placed in position.

To the inner sides of the uprights CC, at the front end of the frame, are pivoted a pair of hook-shaped supports, L' L', in which cordwood and the like may be placed while being sawed. When logs or heavy'timber are to be operated upon, these supporting-hooks are to be simply swung back out of the way.

M' M' are dogs pivoted to the outer sides of the frame-beams E E. for the purpose ofholding the wood securely while being sawed. When logs are to be operated upon, these dogs are to be moved forward, according to the size of the log, and additional bolt-holes, N', are provided for this purpose.

The frame of the machine is to be provided with suitablebraces wherever needed, and the several pai ts are to be securely bolted together.

The operation of this invention will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed. By operating the crankshaft, a reciprocating` motion is, through the toggle-bars and the swing-bar I), imparted to the saw, the length of stroke, and consequently the power, being regulated by properly adjusting the toggle-bars Mzand the connecting-rod C' with relation to the fulcrum of the swing-bar I?. The saw may be easily raised while in motion for the purpose of adjusting material to be sawed, and a guide of p rgpyer construction is provided wood without deliection to either side.

The general construction of the machine is simple and inexpensive, and it is easily manipnlated and operated. l

I would have it understood that with regard to the construction' of the details of this device I do not wish to limit myself to the precise construction herein shown and described, but reserve to myself the right to all such niodifications as may be resorted to without departing from the spirit of my invention.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States- 1. In a wood-sawing machine, the combination, with a suitable frame, of a double-crank shaft, a pivoted arm having a reciprocating slide, a pivoted rod connecting Vthe said slide with the lower end of a swinging arm, togglebars connecting the said swinging arm with pitmen mounted upon the crank-shaft, and a saw secured to the reciprocating slide, substantially as and for the purpose set forth.

2. In a wood-sawing machine, the combina- 7o tion of a pivoted arm having a reciprocating slide carrying the saw, operating mechanism for the said slide, an upright having a series of ratchets, a lever having a tooth engaging the same, and a rope or chainI passing over a pulley at the upper end of the said upright, and connecting the said lever with the pivoted saw-carrying arm, which may thereby be raised to and retained at any desired elevation, substantially as and for the purpose set forth.

3. In a wood-sawing machine, the combination of a pivoted arm having a reciprocating saw-carrying slide, mechanism for raising and retaining the said arm, a pivoted rod connecting the slide adjustably with the lower end of

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