US979895A - Mitering-machine. - Google Patents

Description

O. T. SPENCER. MITERING 'MAGHINE.

APPLICATION-FILED JUNE 25/1910.

Patented Dec. 2-7, 1910. a sums-SEEM 1.

- BY 8 M ATTORNEY THE cums PETERS cd., wnsnmcruu n c.

c. SPENCER, MITERING MAGHINE. APPLICATION FILED JUNE 25, 1910.

Patented Dec. 27, 1910.

3 SHEETS-SHEET WITNESSES:

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0. T. SPENCER;- MITERING MAGHINBI APPLICATION IILED JUNE 25, 1910 979,895. 7 Patented Bea-27, 1910.

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ATTORNEY 1n: NORRIS PETERS cm, WASHINGTON, n, c.

UNITED STATES PATENT QFFIGE.

CHARLES T. SPENCER, OF ELMIRA, NEW YORK.

MITERING-MACHINE.

To all whom it may concern:

Be it known that I, CHARLES T. SPENCER,

a citizen of the United States, residing at Elmira, in the county of Chemung and State of New York, have invented certain new and useful Improvements in Mitering-Machines, of which the following is a specification.

This invention relates to improvements in power sawing machines, which may be set and operated to cut miters of any desired angle; and my object is to provide a machine of this character which will be particularly adapted for cutting the ends of window sash bars where they are mitered to one another and to the sash frames.

I attain my object by constructing the machine in the manner illustrated in the accompanying drawings, in which Figure 1 presents a front elevation of the machine with the front cross bars of the frame broken away to show the operating mechanism; Fig. 2, a plan view of the machine on a smaller scale; Fig. 3, a horizontal sectional view on the line mx in Fig. 1; and Fig. 4, a vertical section on the line g y in Fig. 1, looking to the left, to show the means of operating the table.

Like numerals designate like parts in the several views.

In this machine the saws by which the miter cuts are made are circular and two in number, the saw 2 being positioned above the saw 1; both saws being mounted on theirarbors, 3 and 4, so as to rotate in planes which intersect one another in a vertical line, and having their perimeters set up tangent to or across said line. The arbors 3 and 4 are mounted respectively on standards, 5 and 6, which are fastened to supporting yokes, 7 and 3, pivotally mounted at 9 and 10 on the diagonal cross bars 11 and 12 of the frame of the machine. The axes of these pivots 9 and 10 coincide with the line of intersection of the saw planes when projected downward, sothat when either one, or the other, or both, of the yokes 7 and 8 are swung around on their pivotal supports the saw blades 1 and 2 will be moved into corresponding angular adjustment, without, however, altering the position of the line of intersection of their planes. The saws are I driven from a vertical shaft 13, mounted in boxes on the cross bars, 11 and 12, said shaft being provided with a pulley 14, from which a belt is carried over guide pulleys 15 ting of the saws.

Specification of Letters Patent. Patented Dec, 2'7, 1910 Application filed June 25, 1910.

Serial No. 568,824.

guide pulleys 23 and 22, to the pulleys on the saw arbors, 4 and 3.

At a suitable distance below the lower saw 1, a horizontal work table 24 is positioned, said table being provided with openings, as shown in Fig. 2, which will permit the standards 5 and 6 and the driving belts to be angularly adjusted for the proper set- The table is fastened to uprights 25 by means of brackets 26, said uprights being vertically mounted in guides 27, attached to the side bars of the machine frame, in order that the table may be raised and lowered in feeding the work to the saws. To accomplish the raising and lowering of the table I. provide a foot treadle 28 attached to arms 29, mounted upon a bar 30, which passes across at the rear of the machine frame. To these arms 29, cables 31 are attached, which pass over pulleys 32 and thence downward to brackets 33, attached to the uprights 25. The weight of the table is counterbalanced by means of the weights 34, hung between arms 29 back of the treadle; so that a slight pressure of the foot upon the treadle will operate to raise the table.

The work is guided to the saws, and held in position to have the proper bevels cut, by means of the guide plates 35 and 35 positioned in alinement with one another at opposite sides of the line of intersection of the saw planes. The guide plate 35, against which the work is placed when being fed to the saws, is fastened to a plate 36, provided with slotted foot pieces 37 attached to a horizontal arm 39 by means of thumb screws 38. In the same way the guide plate 35 is fastened, by means of foot pieces 37 and thumb screws 38, to a corresponding horizontal arm 39*, said arm being fastened at 40 to the ends of a semi-annular plate 41, which rests upon the top of the table and is held in position thereon by means of the curved guide pieces 42 and 43. Braces 44 extend from the plate 41 to the arms 39 and 39 to hold them firmly in alinement with one another. The guide plates 35 and 35 are, therefore, susceptible of simultaneous angular adjustment around the line of intersection of the saw planes as a center, and they are held in such angular adjustment by tersected by the line of intersection of the means of a clamp, as shown at 45 in Fig. 1, k

which engages the underside of the table, the edge of the table being curved at the side to correspond with the line of travel of this clamp. The thumb screw by which the clamp is set up against the table may be positioned either on the underside of the table, as shown in Fig. 1, or upon the upper side of the arm 89. To facilitate the adjustment of the guides I provide the upper surface of the table with an angular scale 46, running from 0 to 90, as shown in Fig. 2. The guide plate 35, which may be of any desired length, is provided with a fractional inch scale, and with a sliding stop block 47, whereby the sash bars may be cut to the desired length by feeding them up to the stop, when properly positioned on the scale.

To accomplish the angular adjustment of the saw blades, the yokes 7 and 8 are provided with arms e8, which extend outward over horizontal segment plates 49, attached to the front and rear cross bars of the ma chine frame; the ends of the arms 48, where they project beyond the segments, being provided with clamps 50, (see Fig. 1), which engage the underside of the plates, and with thumb nuts, 51 for setting up said clamps. The segments 49 may also be provided with scale marks for indicating the angular adjustment of the saws.

Having thus described the several parts of the machine, it will be operated to cut the sash bars in the following manner :-The saws will first beset at an angle to one another to cut the desired miter at the ends of the bars. Thus, where the stiles and rails of the sash, to which the bars are to be fitted, are at right angles to one another, and the bars are to be run diagonally across the sash, the saws will be set at an angle of 90 to one another. guides 35 and 35 will be set to bisect the angle of the saw planes. If, however, the sash be oblong, the angle of adjustment of the guide plates must be varied accordingly. After the long bars have been cut and fitted in the frame, the shorter cross bars will be cut to fit in between the long bars by adjusting the guide plates and the lower saw to the required angles, and the short bars will be fed up to the lower saw only. Thus, in Fig. 2, the lower saw is shown set at an angle of 90 to the guide plates to cut the short bars to be fitted at right angles to the long bars. Where the sashes are not right angular, and where three or more sash bars are to be fitted together, the angular positions of both saws will be changed to meet the requirements.

In setting the machine for different widths of sash bars, the guide plates 85 and 35 will be set backward or forward on the arms 39 and 39 so that, when the bars are fed along them, the center line of the bars will be in- Then, if the sash be square the saw planes. may be quickly and accurately set to cut the sash bars for any form of window.

While I have described the saw as being particularly adapted for the cutting of sash bars, I do not limit myself to such use; and Ifurther wish it to be understood that the machine parts may be altered without departing from the spirit of my invention to adapt it for doing this and other classes of miter work.

Vhat I claim as my invention and desire to secure by Letters Patent is 1. In a mitering machine, a pair of saws positioned to operate in planes which intersect in a fixed line and havingtheir arbors mounted in bearings normally fixed as to movement in a plane at right angles to said line, one of said saws being mounted beyond and extending to or across the plane of the other saw, combined with means for adjusting the bearings to change the angular positions of one or both of said saws around said line of intersection as a center.

2. A mitering machine comprising a table, a pair -of saws having their arbors mounted in bearings normally fixed as to horizontal movement, the plane of said saws intersecting in a fixed line perpendicular to the table and one saw extending to or across the plane of the other, means for positioning the work on the table between the saws and means for imparting relative vertical movement between the saws and table.

3. A mitering machine comprising a table, a pair of saws having their arbors mounted in bearings normally fixed as to horizontal As so arranged, the machine j movement, the planes of said saws intersecting in a fixed line perpendicular to the table and one saw extending to or across the plane of the other, means for adjusting the bearings to change the angular positions of one or both ofsaid saws around said line of intersection as a center, and means for imparting relative vertical movement between the saws and table.

4. A mitering machine comprising a table, a pair of saws having their arbors mounted in bearings normally fixed as to horizontal movement, the planes of said saws intersecting in a fixed line perpendicular to the table and one saw extending to or across the plane of the other, a work guide on the table between the saws adapted to be set at different angular positions around said line of intersection as a center, and means for imparting relative vertical movement between the saws and table.

5. A'mitering machine comprising a table susceptible of vertical movement upon the frame of the machine, a pair of saws, standards passing upward through openings provided therefor in the table, the saws being mounted on said standards above the table in planes which intersect in a line perpendicular to the table with one saw extending to or across the plane of the other, pivotal mountings for one or both of said standards in aXial coincidence with said line of intersection extended downward, means for fastening said standard or standards in diiferent angular adjustments, a work guide upon the table adapted to hold the work to a line which intersects the line of intersection of i the saw planes, means for setting said guide at difierent angular positions around said. line of intersection as a center, means for imparting rotary motion to the saws, and means for imparting relative vertical movement between the table and saws.

6. A mitering machine comprising a table, a saw positioned above the table, a semiannular turntable plate mounted in guide ways on the table, diametrically opposite guide bars fastened to said plate in position to guide the work to the saw, means for setting said plate and bars at difierentangular positions around the saw, and means for imparting relative vertical movements between the saw and table.

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

CHARLES T. SPENCER. lVitnesses:

EUGENE DIVEN, M. E. VERBEOK.

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