US148840A

US148840A - Improvement in dovetailing-machines

Info

Publication number: US148840A
Authority: US
Publication date: 1874-03-24
Anticipated expiration: 1891-03-24

Description

W. F. MODY.

DovetaIing-Machines.

30,148,840 Patented March 24.1874,

WMTNEEES \NvENTuR 'UNITED STATES PATENT FFIGE.

VILLIAM F. MOODY, OF CHICAGO, ILLINOIS, ASSIGNORl TO HIMSELF, CHARLES L. AMES, AND ABEL H. FROST, OF SAME PLACE.

IMPROVEMENT IN DOVETAILING-MACHINES.

Specification forming part of Letters Patent No. 148,840, dated March 24, 1874; application filed i September 29, 1873.

To all whom it may concern:

Be it known that I, VILLIAM F. MOODY, of Chicago, in the county of Cool; and State of lllinois, have invented an Improvement in l)ovetaili11g-Machines, of which the following is a specification:

The object of the present invention is so to improve the doveta-iling-machine patented by me April l, 1873, and numberedll, as to provide means for removing the chips from the doveta-ils by withdrawing the stuff, being worked, from the machine; and its nature consists in a radial arm which is attached to the shaft of the crank-wheel, driving the chisel, and rotated with it. The outer end of the arm is provided with a spring-collar, which is so operated upon by a springnotched wheel and lever as to be moved in on the arm, and escape a stop in the internal periphery of the drive-wheel when the chisel is to remove the chips from a doveta-il, the spring moving the collar outward to catch the stop on the internal periphery of the wheel when the chisel is to have a reciprocating motion. The notched wheel is operated by a lever, governed by two stops in its movement, as the whole is hereinafter' fully described and shown.

In the drawing, Figure 1 is a side elevation of my improvement in dovetailing-machines5 Fig. 2, a front elevation thereof 5 Fig. 3, a rear elevation.

A B represent an arched frame-work and a bed or foundation supporting the arch, constructed in substantially the same manner as the same parts in the patent referred to. a is the table on which the stuff to be dovetailed may be put. M represents the chisel running in guides J J on a cross-piece, I, and being operated by a pitman, K, connecting-joints T m, and a crank-wheel, D, thelatterbeing driven by a wheel, C, in the same manner as it is driven in the machine in my said patent, except as hereinafter described. The wheel C in this improvement runs loosely on the shaft F of crank-wheel D, and is only made to turn said shaft and operate the chisel M by the following means: An arm, t, is fastened to the shaft F, and on its outer end is placed a sliding collar, S, which is forced outward by a coil-spring, w, so as to catch on a stop, X, attached to the internal periphery of Wheel C. This arrangement is such that when the wheel C rotates the stop will carry the arm t around, and con sequently turn the crank-wheel D. The collar S is carried inwardly so as to allow the wheel C to rotate without driving the chisel, by means of a spring, a, which is fastened to the arched frame B, and it projects into a notch in a wheel, H, so that when the latter is turned by a lever, G, operating its shaft, the spring a will catch under the collar S, as shown by its position in Fig. 2, and raise it on arm t, so as to allow the stop x on the wheel C to clear the arm and rotate without carrying it. This arrangement is such that the chisel M. will be brought to a dead stop when it is at the bottom of the dovetail, as shown in all the gures, andin that position permit the dovetailed stuff to be withdrawn to remove the chips from the dovetail. The lever G, bearin g against the stop or pin L', is in position to hold the arm t on the spring n; but when the wheel C is to carry or rotate the arm, the lever G is to be locked against the pin or stop L. Such locking causes the wheel H to turn and release the spring u, and loosen the collar S, so as to catch on thestop X.

What I claim, and desireto secure by Letters Patent, is-

In a dovetailing-machine, the spring n, loose wheel C provided with a stop, X, in combination with the notched wheel H, chisel M, pitman K, and crank-wheel D, substantially as and for the purpose set forth.

WILLIAM F. MOODY.

YVitnesses:

G. L. CHAPIN,

HARRY COLEMAN.