US483436A - Miter-cutter - Google Patents

Description

(No Model.)

W. B.. FOX.

MITBRl GUTTER. No. 483,436. Patented Sept. 27, 1892.

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UNITED STATES PATENT OFFICE.

WILLIAM R. FOX, OF GRAND RAPIDS, MICHIGAN.

MITER-CUTTER.

SPECIFICATION forming part of Letters Patent No. 483,436, dated September 27, 1892.

Application tiled November 18, 1891. Serial No. 412,311. (Nomodel.)

`.To @ZZ whom t may concern:

Be it known that LWILLIAM R. FOX, a citil zen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Miter-Cutters, of which the following is a specification.

My invention hereinafter described is an `improvement in miteringmachines, a part of it relating to a special form of support for mitering-machines and a part relating to the gage therefor.

The first part of the invention includes a p swivel or rotating mitering-machine in which the upper part, carrying the mitering mechanism, is swiveled upon the base in which the of the machine.

' of a casting having annular rim a and legs b,

The

these being of any convenient shape.

Upon

rim has an interior horizontal Iiange c.

. the upper part of this ange rests an annular base CZ of the hollow column D, the upper part of which has a horizontalannular fiange which supports the bed and upper works of the mitering-machine. Near the upper end of this column is a diaphragm f and an interior stud g. The column is mounted upon the base with its lower annular end resting upon the flange c within the rim a, and it is held there to by means of bolts h, which -pass throughl the iiange d and inside of the flange c and are held in a ring 7c underneath the flange c, the construction being such that the column D is securely held in place, but it is permitted to turn on the base and can be securely clamped by tightening one or more of the screws. Upon one of the legs of the base is pivoted the treadle l, the free end of which extends outwardly into convenient position for use by the operator. Within the hollow `column is a central vertical rod m, the lower end of which is pivoted to the treadle. The upper end passes through a hole in the broad lug or diaphragm fand is connected to the carriage of the cutter. The upper part of the rod is threaded, and it is held to the cuttercarriage by a nut above and below. The treadle and the cutter-carriage are kept normally raised by means of a spring s, attached above to the lug g and at the lower end to a swivel ,which surrounds the rod underneath the collar n. The upward motion of the rod 'm is limited by a vertically-adjustable buler o upon the nut w, and when the rod and cutter are drawn up by the spring the buffer bears against the under surface of the lug f. When the machine is used to cut narrow material, the butter may be set up so as to permit the cutter to rise a lesser distance, and thus is avoided unnecessary movement of the treadle and the foot. Asimilar buer might be placed above the perforated lug to limit the downward movement; but this would be of less importance.

In putting up machines of this class in which the knife makes an angular cut tothe face of the gage it is diicult to make the knife cnt at the same angle in dierent kinds of wood. In some stock the wood will draw the knife more and cut the molding more open at the heel, and in other kinds of wood less. In order to overcome this difficulty and to provide an adjustment which will compensate for this variation in cutting dierent kinds of wood and also to make it easy to put up a machine which will cut a perfect miter, I have provided an adjustable face for the gage either at one or both ends. In Figs. 4 and 5 I have shown it at one end only, and this I deem ordinarily sufficient. The face of the gage is reduced, as shown in Fig. 4, leaving a ledge at 2. On this I Iix a supplemental face-plate 3, which rests on the ledge at 2, this being of a depth just suliicient to leave the face of the supplemental plate flush with the other face of the gage. The depth of the cutaway portion in the other part is greater than the depth of the plate, leaving an open recess 4. The inner end, which rests on the ledge, is fixed in place by screws or rivets, while the outer end is adjustable, being held up and resting upon setscrews 5 5, by adjustment of which the free ICO Y or out.

end of the supplemental plate may be set in rIhis free end is held down upon the set-screws by means of a screw 6, the head of which is iiush with or below the face of the supplemental plate. By means of these screws the outer ends of the supplemental plate may be adjusted and held for the purpose heretofore explained. Y

In the center of the gage or on a line opposite the angle ot the cutter I form a groove, preferably angular in cross-section, in which the angle of the cutter moves, thus allowing the edges to pass by the Yface of the gage.

I claim as my inventionl. In a miter-cutting machine having a base, the means for reciprocating the knife-carriage connected with said base and a rotary top supporting the carriage and capable of being rotated upon the base, the said carriage rotat- 4ing with the said top, whereby it may be adjusted to different positions about the axis of the top, substantailly as described.

2. In combination, a base, a column capa-V ble of being turned on said base, a cutter-carriage mounted on said column and adjustable therewith, a rod connecting the carriage to the device for operating said carriage, a lug on said column, and an adjustable stop on the connecting-rod, arranged to bear on the lug, substantially as described.

3. In combination with the base having a treadle, the rotatable column and the top having the cutter-carriage, a rod connecting said carriage with the treadle, a swivel on the said rod, and connections between said swivel and the column, arranged to raise thetreadle, substantially as described.

4. The gage consisting of the body portion bearing upon an annular iiange on the base,

and means for clamping the two together adjustably, whereby the column with the cutter may be adjusted to different axial positions, substantially as described.

6. In combination, the base, thecol'umn arranged to turn on the base, the top, the guide- Ways for the cutter, carried by the Ytop and adjustable axially/with the column, the axial rod connected to the treadle, pivoted to the base, and the cutter-carriage connected on its rear side with the axial rod, the said top extending frornthe column forward of the cutter and carriage, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM R. FOX.

Witnesses:

Bessin J oNEs, JOHN DUFFY.

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