US274020A - Wood-boring machine - Google Patents

Description

(No Model.) y

J. M. NASH; WOOD BORING-MACHINE. No. 274,020. Patented Mar. 13,1883.

*3 N R s WITNESSES: INVENTORJ ATTORNEYS.

which a UNITED STAT- s JOHN M. NASH, OF HUDSON, WISCONSIN.

wooo-eoame MACHINE.

SPECIFICATION forming part of Letters Patent No. 274,020, dated March 13, 1883,

I Application filed July 2 1, 1882. (No model.)

To all whom it may concern:

Be it known that I, JOHN- MILTON NASH, of Hudson, in the county of St. Oroix and State of Wisconsin, have invented a newand useful Improvement in Wood-Boring Machines, of which the following is a full, clear, and exact description, reference being had to the annexed drawings, forming part of this specification.

The object of this invention is to provide a machine for boring by a single operation a number of holes at different angles to each other, such as are required in chair-legs, 85c.

In the drawings, Figure 1 is a side elevation of the machine. Fig. 2 is a front viewof apart of the same, and Fig. 3 is a plan view of the table. a

A represents a cast pedestal or support for the machine, having at its upper end a ciirved arm, B, extending upward'and over the same.

To the upper end of the pedestal is pivoted a frame, 0, having slots D near its ends, and thumb-screws E, passingthrough the slots into the pedestal, by which the inclination of said frame may be adjusted as desired. This frame is provided with ears F, to which is pivoted a horizontal table, G, and the table is provided with a semicircular plate, H, having a segmental slot and a thumb-screw, I, passing through the slot into said frame, by which the lateral. inclination of the table may be adj usted as desired.

To the upper surface of the table are secured bearin gs J for the mandrels K, which bearings are ad justably connected to the table by means of bolts passing through slots which are to be formed in the table, as hereinafter described, whereby the mandrelsmay be adj usted toward or from each other. The rear ends of the mandrels are connected to yokes L, which are provided with rods M, passingthrough slots which are to be formed in a bar, N, and secured loosely therein by nuts on opposite sides of i the said bar, in order that said yokes may be moved toward or from each other in the adjustment of the mandrels.

To the upper end of the arm B is pivoted a frame, 0 aving a segmental slot through "TIb-SCIBW P, passes into said arm to hold said frame atany desired angle of ini clination.

To ears on the frame 0 is pivoted a bracket,

vided with a slot and screw for adjusting itin any desired position. This bracket is provided with slots S, as shown in Fig. 2, by means of 60 which bearings J are adj ustahly secured thereto in precisely the manner the bearings J are secured to the table G. In these hearings are supported mandrels K, having yokes L, connected to a bar, N, corresponding in every particular with the bar N. With this construction the mandrels are adapted to be adjusted toward or from each other just as the mandrels K. The bar Nis supported in a slotted angle-lever, T, and the bar N is connected to a lever, U, while the levers T and U are connected by rods V to a third lever, W, which is weighted at one end and connected at the other with a foot-lever, X. The levers T and X are slotted, as shown, in. order that the connecting-rods V may be adjusted to vary the stroke of said levers.

The mandrels, which are provided with boring-bits Y, are geared with the drive-wheel Z by means of pulleys U on the mandrels and the belt V, passing over the pulleys W X Y. The pulley X is supported in a slotted bearing, Z, whereby the tension of the beltmay be kept at the required degree. With this construction the two sets of boring-hits may be adjusted at various angles to each other, and the bits ofveach set may be adjusted laterally with respect to each other, while ,they always remain parallel. By means of a single belt the two sets of bits are rotated, and they are forced into or withdrawn from the wood that is being bored by the treadleX and the weighted lever W, respectively.

The table G is providedwith an angular cross-bar, G, which is adjustably screwed to a bracket, afby means of a longitudinal slot, a, in the bar and a bolt having its head adapted' to move in the slot, and the bracket is connected to the table by means of a segmental slot, 1), in the bracket and a bolt having its head adapted to move in a slot, b,in the table. I) is-a stop; With this construction the piece of wood to be bored may be held in the angul ar bar G at any desired angle of inclination.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. A wood-boring machine having two sets of boring-bits, which are supported normally at right angles to each other and combined with means for adjusting each set at an angle with a vertical orahorizontal plane, and means for adjusting the bits of each set to or from each other, substantially as shown and described. V

2. The combination,with a suitable support and a series of mandrels, of a frame pivoted to the support and adapted to be secured at any' desired inclination with respect thereto, a sec- .ond part pivoted to the frame, with its pivots at right angles to the pivot of the frame, and

adapted to be secured at any desired inclina- 7 JOHN MILTON NASH. Witnesses:

M. A. FULTON, F. S. DURAND.

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