US155854A - Improvement in scroll-sawing machines - Google Patents

Description

l. E. BROWN.

Scroll-Sawing Machine s. No.155,854, Patented 0t.l3,187 4.

Wings flap I fiwazjar.

THE GRAPHIC CO. PHOT O'LITFL39I- +1 PARK FLACEJQX.

UNITED STATES PATENT OFFICE.

JAMES E. BROWN, OF XENIA, onio.

IMPROVEMENT IN SCROLL-SAWING MACHINES.

Specification forming part of Letters Patent N 0. 155,854, dated October 13, 1874; application filed April 21, 1874.

To all whom it may concern:

Be it known that I, JAMES E. BROWN, of Xenia, in the county of Greene and State of Ohio, have invented anlmprovement in Scroll- Sawing Machines for sawing out the twisted parts of stair-railings; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings making part of this specification Figure 1 being a side elevation of the machine; Fig. 2, a top view of the same; Fig. 3, a top View of the adjusting bed-plate on which the saw-table is mounted; Fig. 4, a vertical section of the adjustable elevating rest for the rail-piece to be sawed; Figs. 5 and 6, views of other parts detached.

Like letters designate corresponding parts in all of thefigures.

The nature of my invention consists in the several devices herein described for holding the pieces of wood to be sawed, and for adj usting them in position, to vary the size and form of the twisted portions of rails to be produced therefrom.

Let A represent the bed-frame on which the machine is mounted; a, the bed-plate on which the saw-table b is mounted, by means of a supporting-standard, c. In the plate a there are slots, (shown in Fig. 3,) through which pass set-screws, which serve to fasten the said plate securely to a projecting flange on the bed-frame A. By means of these slots and set-screws, the saw-table b is held adjusted to a greater or less distance from the saws e e, the adjustment being effected by a screw, f, turning in a nut of the plate a, and a holdingsocket, 9, Fig. 1, of the bed-frame. The supporting standard 0 is, at its upper end, fitted centrally in a collar, d, on the under side of the saw-table b, and centrally down through the table and standard; and through the bedplate a a hole is formed, through which a bolt, snugly fitting therein, is inserted and held by a nut, securing thereby all the parts together. On the saw'table b is located a bedplate, h, on which to mount a standard, 70, for sustaining the upper end of the piece 121., from which the section of the rail is to be sawed. This bed-plate has a circular adjustment on the saw-table, being pivoted over the center of the table, and having concentric slots *5 i, provided with set-screws screwing down into the table, as shown in Fig. 2, whereby the position of the standard It is adjusted to different lengths of pieces to be sawed. The standard k is also adjusted in position on the bedplate h, nearer to or farther from the center of the saw-table b, by means of a slot, j, in the said bed-plate, with raised sides, over which the base of the standard slides, and is held in any position to which it is adjusted by a set-screw, t. The standard It is thus adjusted to saw rail-pieces to difl'erent radiuses. This standard also has an upper portion, Z, adjustable up and down on the main part of the standard to vary the height of the upper, and of the piece to be sawed and the pitch of its inclination. The upper end of the adjustable part I is hinged thereto, and has screwholes to fasten it to the piece m, as shown most clearly in Fig. 4, so that it will abut at any angle against the said piece. The lower end of the piece m is screwed to a holder, at, which turns to any angle, vertically, on a .round holder-rod, 0, extending radially, or nearly so, from near the periphery toward the center of the saw-table b, to which it is fixed by suitable bearings at the end. The holder at is adjusted upon this rod to cut a section of railof greater or less radius from the piece m, and

held by means of a set-screw, p, or its equiva-' lent.

WVith this construction, when a piece, m, has been inserted and secured in place, and adjusted to the proper inclination and radius, the table b, on which it is mounted, is caused gradually to turn on its center, by any suitable and well-known means, to feed the piece to the two saws, e 0, while in motion, and the two side surfaces of the piece are thereby shaped. A portion of the table b is cut away, as shown at s, Fig. 2, to allow the table to be fed by the saws. The table b must be adjusted to produce the proper radius of the rail by adjusting its standard 0 upon the bed-plate a, above described. A table, 1, and saws 2 2 are employed for cutting the rail-pieces to the proper thickness, and shaping their upper and lower surfaces after their circular sides are shaped, as above described. On the table 1 is a rest, 3, on which to lay the pieces, being of peculiar construction, as shown in Fig. 5, which is a top View, and in Fig. 6, which is an end View thereof. 0n the under side of the rest is a pivot-pin, fitting in the top of the saw-table; and concentric with this pivot, on which the rest turns, is a slot, 1), in which is a set-screw to secure the rest in any desired angular position on the table. By this adjustment, the rest is adapted to any variation of the pitch of the rail-piece. The top of the rest has two parallel raised surfaces, as shown in Fig. 5-0ne behind and the other in front of the sawsmaking a sunken place between, in which will fit and lie securely the rounded surface of the rail-piece, of whatever shape. In the table 1, suitable holes are cut to allow the saws 2 2 to move up and down in.

JAMES E. BROWN.

In presence of THOMAS E. SCROGGY, BEN. NESBITT.

Images