US176447A - Improvement in wood-sawing machines - Google Patents

Description

J. H. SINGLETON.

WOOD-SAW'ING MAQHINE. No.176,447. Patented Apr'1125, 1876.

MINI] l lIIIIII Inve mi 01 Him PNOTO-UYHDGRAPIIEI. WASHINGTON. D C.

UNITED STATES PATENT OFFICE.

JOHN H. SINGLETON, OF ST. LOUIS, MISSOURI.

IMPROVEMENT IN WOOD-SAWING MACHINES.

Specification forming part of Letters Patent No. 176,447, dated April 25, 1876; app ication filed March 8, 1876 To all whom it may concern Be it known that I, JOHN H. SINGLETON, of St. Louis, in the county of St. Louis and State of Missouri, have invented certain new and useful Improvements in Wood-Sawing Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to a wood-sawing machine, in which the wood is held down upon the frame by an arrangement of levers, so that the attendant can regulate the pressure by one lever, and when the wood has been out, by another lever it is released, and at the same time, when the first lever is raised, the saw-frame is also raised to free the saw from the wood, all of which will be hereinafter more fully described. a

Figure 1 is a side elevation of the machine, partly in section. Fig. 2 is an end elevation. Fig. 3 is a side view of the clamping-levers. Fig. 4. is a top viewof the saw-frame; and Fig. 5 is a side view of the same.

A is the main frame or table, which supports the machine, and may be made in any convenient and substantial manner. A A represent gallows frames or gins, which are posts of the frame A, carried above the top of the table, and on which is a cap or headpiece, A. B B is a frame for the support of the saw, and is pivoted on the franggaia, in line with the shaft of the fly-wheeh iie side of it being supported on the shaft. This frame B has on the inside of the lateral pieces a slide piece or way projecting inwardly, on which the saw-frame is supported, as seen in Fig. 2, in the section at b b. 'These may be half round or square, and of metal or hard wood. This saw-frame has fastened in it a common bucksaw, D, placed as represented in Figs. 4 and 5, where the frame of the saw is securely fastened in the sliding frame (J, which slides upon the projections b b. The frame B, being pivoted at B, is suspended by cords do, which pass over pulleys a a in the head-piece A, and thence down alongside of the frame on each'side, and have weights suspended to them. On the cord 0 the weight D has another cord, 0, which passes under a pulley,' .E, fixed to the post A, and thence upward to another pulley on the frame A at E, and downward again to the end of the clamping-lever L at l, as seen in Fig.1.

It will be seen that when the lever L is raised to release the log, the other end L, in descending, will carry the cord 0, and thus by the several pulleys, transfer the strain to the saw-frame, and lift it up clear of the log, to permit it to be moved for another out.

The clamping devlce is as follows: L is a handle or bent lever, pivoted on a cross-rod, d, which is supported on the posts of the frame A. At the end l, Fig. 3, is a drop or strut, M, which is just long enough to reach the floor of the frame at M, and will, of its own weight, fall to the position shown, and when the handle L is forced down to clamp the wood at W, Fig. 1, the drop M will be sure to hold the clamp. Attached to lever L is another lever, N, pivoted at n, and connected at its lower end by a bar, N, to the drop M. The function of these is to throw the end of the drop outwardly, when the lever L is to lifted from the log. They also assist in drawing the drop M tighter, if found requisite. In front of the main frame A is the horse, for holding the stocks of wood, and is framed as usual, X-shaped, as seen in Fig. 1, in dotted lines.

When small cuts are to be made, boards 6 e are to be laid inside, so that the log will have a continuous bearing, as seen in section in Fig. l at W. These are unnecessary where the log will have a support without them on the frame.

The saw-frame O, which slides in the swinging frame B is connected by a pitman-bar, G, to the crank of a fly-wheel, F, which is operated by a pinion, H, on the end of the shaft f, and which is driven by a spur-gear, H, on another shaft, operated by a crank-handle.

In some machines the shaft of the crankhandle may be placed near the saw end, and the power be communicated by a drum on it, and a pulley on shaft f, connected by an endless belt.

The fly-wheel may be used as a barrow,

B, carrying the sliding saw-frame C, cords c c c, pulleys a a E, and weights D, and lever L L, substantially as and. for the purpose described.

In testimony that I claim the foregoing as my own, I hereby affix my signature in presence of two witnesses.

J NO. H. SINGLETON. Witnesses:

WM. DINGS, BEN L. HICKMAN.

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