US13305A - Sawing-machine - Google Patents

Description

UNITED STATES PATENT OFFICE.

B. FULGH'UM, OF RICHMOND, INDIANA.

Specification of Letters Patent No. 13,305, dated July 24, 1855.

To all whom it may concern:

Be it known t-hat I, BENJAMIN FULGHUM, of Richmond, in t-he county of Vayne and State of Indiana, have invented a new and Improved Machine for Sawing Boards, Lath, Joists, Scantling, &c., Direct from the Log; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l, is a longitudinal vertical section of my improvement, m, x, Fig. 2, showing the plane of section. Fig. 2, is an end View of ditto. Fig. 3, is a detached plan or top view of the slide which operates the clutch by which the log is turned. Fig. il, is a transverse vertical section of the saw frame, y, y, Fig. l, showing the plane of section.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to a new and improved machine for sawing boards, laths, scantling, oists, etc., direct from the log, and consists in suspending the log below the shafts, one of which is attached to the log and is connected by gearing to a clamp, which will be presently shown and described, whereby the log is turned a certain distance at every stroke or vibration of the saw frame, which frame is also operated upon simultaneously with the log and by the same device or clamp so as to be moved or fed downward toward the log at the end of each stroke and thereby cause the log to be cut by means of a vertical and horizontal circular saw, in a spiral or scroll manner and into stuff of the desired size.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A, represents a rectangular frame on the upper part of which a transverse shaft B, works in suitable bearings. On this shaft B, there is placed `loosely a frame C, see Fig. 1, the shaft B, passing nearly through the center of the frame. To the outer end of the frame a weight D, is attached, and to the inner or opposite end there is attached a pendent frame E, having a saw shaft F, at its lower end which shaft passes through a fra-Ine G, fitted or working in suitable guides attached to a frame G, in the frame A, the shaft F, securing the lower end of the pendent frame E, to the frame Gr. T0 oneend of the shaft F, a circular saw H, is secured, and to one end of the frame G, a

. vertical shaft I, is attached having a horizontal circular saw J, at its lower end.

On the shaft B, there is placed a pulley K, having a belt a, passing around it, said belt also passing around a pulley L, on a shaft M, at the inner end of the frame C. The pulley L, has a pulley N, attached to it, around which a belt Z), passes, said belt also passing around a pulley O, on the saw shaft E. The pulley O, also has a belt, c, passingaround it, and the belt, c, also passes around a small drum l?, on the frame G, and a belt, (Z, also passes around the drum and a pulley Q, on the vertical saw shaft I.

To one end of the shaft B., a pulley R, is attached and to the front end of the frame A, on its upper part there is a shaft S, having a .pulley T, at one end and a pulley U, at the opposite end. Around the pulleys R, T, a belt., c, passes, and around the pulley U, two belts, f, g, one of which, f, is a cross belt, these belts pass around two pulleys, z, h, which are placed loosely on a shaft V, on the front end of the frame Gr, which works vertically in the frame A. Either of the pulleys 71., h, are connected with the shaft V, by means of a clutch, z', on said shaft, see Fig. 2,

The above described parts constitute a mill for sawing which was formerly patented by me. The circula-r saw H, by the movement of the frame C, and pendent frame E, allowed the frame G, to work with a reciprocating motion back and forth, the saw cutting While the frame was moving in either direction. The saw frame G, is moved by a belt j, which is attached to the ends of said frame, and passes around the shaft V, and a pulley 7c, on a shaft, Z, at the back ends of the guides of the saw frame. The saw frame at the end of each stroke operates the clutch, z', and reverses the movement of the shaft V, and consequently that of thc saw frame G.

To the frame A, there are two shafts X, X, between which the log Y, to be sawcd is centered. One of these shafts X', is attached or connected to the log by a chuck or in any way so that it may turn the log. To the outer end of the shaft X, there is attached a pinion, m, which gears into a corresponding pinion, n, attached to the frame A. The pinion, n, gears into a smaller pinion, o, attached to the end of a shaft Z, which has a bevel wheel A', on its inner end. This bevel wheel gears into a corresponding wheel B, on the upper end of a vertical screw shaft C, which has a bevel wheel D, at its lower end. The screw shaft C, passes t-hrough a cross piece, 29, att-he front part of the frame G. The bevel wheel D, gears into a bevel wheel E, at one end of a shaft F, which has a corresponding gearing H, I, at its opposite end, the screw-shaft J, on which the wheel I, is placed passing through a cross piece, g, at the back part of the frame G. By turning the bevel wheel B, the frame G, may be raised and lowered.

To the outer end of the shaft Z, there is attached a wheel K, having a smooth periphery or rim and upon the shaft Z, adjoining the wheel K, there is placed a plate, r, see Fig. 2, having a bar, s, attached to it by a pivot, 2f. This bar, s, has a recess, s, cut in it somewhat beveled or inclined in which recess the rim of the wheel K, lits, and the plate, o", has a spring, u, attached to it, which serves to keep the edges of the recess, s, binding upon the periphery of the wheel K.

The upperl end of the bar, s, passes through a socket, o, on the outer end of an arm L, the inner end of which is attached by a pivot, w, to an upright lever M. rIhe upper end of this lever M, passes through a V-shaped slot, m, in a plate N, see Fig. 3, which is attached to the end of a rod O, fitted in guides on the frame G. The lower part of the lever M, is provided with a slot, y, through which a pin, z, attached to the frame G, passes.

Operation: The log Y, is placed between the shafts X, X. The relative position of the log and saws H, J, is shown in Fig. 4. Motion is then given the shaft B, and the circular saws H, J, are rotated and the saw frame G, is drawn along between the guides of the frame G, and the two saws cut a strip out of the log leaving a vertical shoulder, a, on the log, as shown in Fig. 4, when the saws have reached the end of the log the clutch, i, is operated by the saw frame G, acting upon it, in any proper way, and the saw frame moves back in consequence of the motion of the shaft V, being reversed. Just previous to the return motion of the saw frame G, the plate N, is moved in consequence of the saw frame G, operating the rod O, and the lever M is moved thereby and the bar, s, turns the wheel K, and the log Y, is turned a suitable distance, and the frame G, is also lowered by the bevel gear wheels B, D, E, I-I, I, and screw rods C, J. These movements of the log Y, and frame G, prepare the log for the succeeding cut and cause the log to be cut in a spiral form as indicated by the red and dotted lines in Fig. 4. The lowering of the frame G, at every stroke or vibration of the saw frame G, determines the width of the stuff to be sawed, and the rotation of the log determines the thickness. And it will be seen that the log may be sawed into stuff of different dimensions by varying these movements. It will also be seen that as the saws approach the center of the log,

the feed motion that turns the log must be increased gradually in order t'o have the stuff sawed of an equal thickness. This is effected by -having the lever l pass through the slotted plate 1 which plate is attached to the frame G, and of course at every stroke of the saw frame and depression. of the frame G, is brought nearer the in, fw, and the movement, or the Alength of the movement of the arm L, is gradually increased.

By the above improvement stuff may be sawed directly from the log without any previous sawing or squaring of the log, which is now done and the timber resawed. It will be seen that my improvement will effect a great saving in this way alone. Again, small circular saws may be used, which are not very expensive. And the log does not require to be handled while in the machine. It is a time and labor saving Inachine and operates well. I constructed one for the purpose of testing its practical utility and it is now in successful operation.

I do not claim the arrangement of swinging frames herein shown for giving a hori- Zontal reciprocating motion to the saw frame G, for that has been previously inlgented, and was formerly patented by me,

What I claim as new and desire to secure by Letters Patent, is-

1. Placing the reciprocating saw frame G, provided with a vertical circular saw H, and a horizontal circular saw J, within a frame G, and placing or centering the log Y, to be sawed between shafts X, X. The frame G, being lowered at every stroke or vibration of the saw frame G, and the log Y, turned simultaneously therewith, a gradually increasing distance at every stroke or vibration of the saw frame G, for the purpose of cutting the stuff an equal thickness direct from the log and in a spiral manner substantially as herein shown and described.

2. I claim operating the log Y, and frame G, by means of the bar, s, attached to the wheel K, as shown, said bar being attached to the arm L, which is Vsecured to the lever M, when said lever VI, is passed through a slotted plate N, attached to the frame G, for the purpose of gradually increasing the feed motion of the log, and causing the stuff to be sawed of an equal thickness as described.

BENJAMIN FULGHUM.

Vit-nesses J AMES M. Pon, JESSE M. HUT'loN.

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