US27134A - Peed-motion for boring or mortising machines - Google Patents

Description

UNITED STATES PATENT OFFICE.

J M. KENDALL, OF SOUTH HARDVICK, VERMONT.

FEED-MOTION FOR BORING OR MORTISING MACHINES.

Specification of Letters Patent No. 27,134, dated February 14, 1860. i

To all whom it may concern:

Be it known that I, J. M. KnNnALLof South Hardwick, in the county of Caledonia and State of Vermont, have invented a new and Improved Boring and Mortising Machine; and I do hereby declare that the following is a full, clear, and eXact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l, is a side sectional view of my invention, taken in the line a2, a', Fig. 2. F ig. 2 a vertical section of ditto taken in the line y, y, Fig. l. Fig. 3, a side view of a portion of ditto.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to an improved machine designed for mortising large timber for framing and consequently where an auger is required in connection with a chisel in order to form the mortises.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a rectangular frame which may be constructed in any proper way to support the working parts of the machine. At one side of this frame A, there is a gate or sash B which is fitted in suitable guides a and is allowed to slide freely up and down therein. In this gate or sash there is placed a vertical arbor O, which has an auger D fitted in its lower end. On the upper end of this arbor C, there is placed a bevel wheel E into which a corresponding wheel F gears, said wheel F being on a shaft G, in the upper part of the sash or gate. To the shaft G a belt H is secured the upper end of t-he belt being attached to the top of the frame A. The wheel F has a toothed wheeel F', attached to it, the use of which will be hereinafter seen.

At the side of the frame A, opposite to that where the gate or sash B is placed there is a similar gate or sash I which, like B, is fitted in guides b and is allowed to slide freely up and down. In the gate or sash I, there is placed a vertical arbor J, into the lower end of which a chisel K is fitted. The upper part of this arbor J has racks o, o, formed in it at two opposite sides as shown clearly in Fig. l. The arbor J is allowed to turn freely in its gate or sash, and it has a lever L, attached to its upper end for the purpose of enabling the operator to turn 1t.

This lever L, also performs the function of a lock securing` the arbor J, in two positions by having the outer end of the lever fitted in a notch at either side of the gate or sash I. Thiswill be fully understood by referring to Fig. 2.

To the upper part of the gate or sash B, two bearings d are attached. These bearings support a shaft M on which` a fast pinion N, and a loose pinion O is tted. The fast pinion N, is in line with the chisel-arbor J.

The frame A is placed between guides P, P,to one of which a rack e, is attached with which rack a pawl Q, which is secured to one side of the frame A, engages. Directly in front of the pawl Q, there is secured a holding pawl R, the latter being also attached to the frame A, and engaging with the rack c.

The lower cross bar f, of the gate or sash I, projects at one end through a slot g in the side of the frame A, and the upper part of the pawl Q, is curved so as to project over the upper part of the slot g. The lower part of the pawl Q, has a spring h, attached to it.

The guides P, P, are attached to a suitable frame R to one side of which a pendant S is attached. To the lower end of this pendant a bar T, is attached by a joint i. To the opposite of the frame R, two pendants U, U, are attached into one of which U', a bar V, fitted loosely at one end. The opposite end of bar V may be secured in either of a series of notches In, in pendant U. To the bar V at about its center a hook Z is attached to hold the bar T.

The operation is as follows: The frame R, is placed on the piece of timber to be niortised shown in red, and is secured thereto, at the proper point by adjusting the bar T, in the hook Z, the bar U, being secured in the proper notch le, of the pendant U. By this means the frame may be readily and firmly secured to the timber. The frame A is then moved on frame R, until the auger D is brought over the desired spot where the mortise is to be made, and the chisel arbor J, is turned so that neither of its racks c will be in gear with the fixed pinion N, on shaft M and the loose pinion O, on said shaft is moved in gear with the wheel F. The operator by turning the shaft M bores a hole in the timber. When this is accomplished the loose pinion O is thrown out of gear with the wheel F. The frame A is moved until the chisel K is over versed as may be required during the operation by turning the lever L, the racks 0,

Valternately gearing with the pinion N.

When the arbor C is turned duringthe operation of boring, the auger D is allowed to feeditself vto its work in consequence of the shaft M, having its bearings d attached to the gate or sash B said. shaft descending with the gate. And when the chisel is operated the gate B is elevated by turning the arbor C in a reverse direction to its cutting one so that the strap H will Wind on its shaft Gr and elevate the ate and auger above the surface of the tim er the strap being sufficiently long to allow the auger to descend to a proper depth during its boring operation. The spring h throws the pawl Q back to catch over a succeeding tooth as the cross-bar f descends. n

Having thus described my invention what I claim, as new and desire to secure byLetters Patent, iss The pawl Q, attached to the frame A, engaging with the rack e, and operated by the cross bar f, of the sash or gate I for the purpose specified.. 1

' J. M. KENDALL.

Witnesses:

LEVI B. LEWIS, H. W. GRAY.

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