US158470A - Improvement in saw-filing machines - Google Patents

Description

2 Sheets-Sheet I.

L Saw-Fi ling Machines.

CLEVELAND.

Patented Jan. 5,1875.-

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2 Sheetssheen,

1,. CLEVELAND. Saw-Fiiing Machines.-

Patented Jam. 5, 1875.

UNITED STATES PATENT OFFICE,

JEROME CLEVELAND, OF TECUMSEH, MICHIGAN, ASSIGNOR TO HIMSELF AND HENRY HAINES, OF SAME PLACE.

IMPROVEMENT lN SAW-FILING MACHINES.

Specification forming part of Letters Patent No. 158,470, dated January 5, 1875; application filed December 10, 1873, 0

To all whom it may concern:

Be it known that I, JEROME CLEVELAND, of Tecumseh, in the county of Lenawee and State of Michigan, have invented an Improvement in Saw-Filing Machines, of which the following is a specification:

The nature of my invention consists'in the construction and arrangement of a machine for filing saws, whereby saws with any-sized teeth may be filed with any desired amount of rake and with or without flem, as will be hereinafter more fully set forth.

Figure l is'a perspective view of my improved saw-filing machine. Fig. 2 is a crosssection through the bed-plate and ways at m w in Fig.1. Fig. 3 is a cross-section of the fileclamp at y y in. Fig. 1. Fig. 4 is an elevation of the opposite of the division-plate from that seen in Fig. 1.

In the drawing, A represents a rectangular iron frame, supported on short legs, and in the sides of whose longer bars are formed the ways a, in which reciprocates a bed-plate, B, carryin g a stationary nut, 0, through which is tapped a lead-screw, 1), having a pitch of one thread to the inch, one end of which is stepped in a lug, I), at the right-hand end of the frame, while the other is journaled through a similar lug at the left-hand end of the frame, and to its projecting end is secured a hand wheel or disk, E, having its inner face divided off into concentric circles, twelve in number, the inner one having a single point, the second two points dividing the circumference into two equal parts, the third into three equidistant spaces, and so on until the last circle, which is pointed or spotted into twelve equal divisions. A complete revolution of the screw in the nut will move the bed-plate a distance of one inch in the ways. A half-revolution will move it a half-inch, and a twelfth of a revolution will move said bedplate one-twelfth of an inch, and so on for intermediate distances. To guide the filer, an index, F, is pivoted to a post, Gr, at the corner of the frame and secured by a set-screw, its free end lying on the face of the division-plate, where its end serves as apointer to guide the filer in moving the hand-wheel, and through it the bed-plate. Back of the middle of the frame, and connected therewith by aT-shapcd girt and a brace, is a clamp-standard, H, with a T-head, which forms the stationary jaw for the movable saw-clamp H, which is pivoted near its middle to a projecting lug, c, and is actuated by a temper-screw, d, at its lower end in clamping a saw-blade. I is a segmental slot cut in the bed-plate in the radius of the center of the clamp, and in it is secured a curved movable post, J, by means of a setscrew, J ,tapped into its lower end, and which clamps it firmly toth'e bed-plate at any point in the slot. K is a frame bolted to the top of the post J, with a shaft, L, transversely journaled at the middle upper part, havingalarge spur-wheel, M, secured to its projecting end, with a crank, M, by which it is rotated. There is also a pinion, N, on the shaft L,which meshes with and gives a slower motion to a gear, N mounted on a transverse shaft, N transversely journaled in the back part of the frame K, projecting through the left side, where it has keyed on it a cam, 12. The large spur-wheelM meshes with a pinion, O, mounted on a shaft, 0, transversely journaled in the near part of the frame, its projecting left end carrying a crank-wheel or face-plate, I, which reciprocates a cross head, f, between the slides g, bolted to the side of the frame K, through a connecting-rod, Q. To the cross-head is pivoted one end of a bar, R, moving over the cam c and through a yoke-guide, h, which allows it to play above a horizontal line in the vertical plane. S is a clamp, provided with a screw, i, slipped over the free end of the bar It, with a circular file-socket, 7c, inserted in its lower end. The lower face of the bar E is fluted to receive the upper part of the socket, which, when the clamp is drawn up by turning down the screw i, is forcibly compressed against said bar, which socket is thereby held immovably in place. The socket has a triangular opening to receive the point of a file, T, whose tang is received in an opening formed in the pendent end of a screw-clamp, S, which slides on the bar B. As the socket 70 may be axially rotated friction-roller, l, journaled at its free end,which presses upon the said bar, the pressure being regulated by a screw, V, tapped through a lug projecting from the frame, its lower end bearin g upon the lower leg of said spring, by means of which the pressure of the file upon the sawteeth is readily adjusted.

The operation of the machine is as follows: The file is inserted in the clamps S and S, and is turned to any desired angle, according to the rake of the teeth desired, by rotating the socket 7c, and the file is firmly held in such position by screwing up the set-screw i, which forces the socket 70 against the lower corrugated surface of the bar It. The standard J, which carries the filing mechanism, is then adjusted in the segmental 'slot I in the plate B, according to the flem or angle of face desired. The index F is then turned to bring its pointed end opposite the desired circle on the inner face of the disk E, according to the size of the teeth of the saw to be filed. The ma chine is now ready for operation, and the saw is fastened in the clamp H H. By now turnin g the crank M the file is moved rapidly back and forth and held by the action of the spring U against the saw-tooth. During each revolution of the slow wheel N the cam 0 will once raise the bar R sufliciently to liftthe file up from between the saw-teeth, and while the file is so raised the operator shifts the bed-plate B, with the entire filing mechanism, to the next tooth, and as the cam e continues to re- "olve the bar R is forced down by the spring U to let the file operate on the next tooth.

The shifting of the filing mechanism is accomplished simply by turning the disk E until the index points at-the next division on the circle, where it is set. This revolution, or partial revolution, of the disk turns the screw D in the nut O, and moving said nut, with the bedplate and mechanism, the exact distance required.

It will thus be seen that when the machine is set properly all the operator has to do is to set the shifting device, when the barR is raised by the cam e, and that any sizes of saw-teeth may be filed with any desired amount of rake, and with or without flem.

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

1. The combination of the sliding bed-plate B, provided with the segmental slot I and nut O, the adjustable standard J carrying the filing mechanism, the screw D, the disk E, provided on its face with a series of concentric circles divided as described, and the adjustable index F, all constructed and arranged to operate substantially as and for the purposes herein set forth.

2. In combination with the reciprocating filing-bar It, the pressure-sprin g U with roller-Z, for the purposes herein set forth.

3. The combination, with the reciprocating filing-bar R, of the pressure-sprin g U, roller 1, and adjusting-screw V, substantially as and for the purposes herein set forth.

JEROME GLEVE LAND.

Witnesses:

H. F. EBERTS, U. E. Hunsrrs.

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