US757734A - Boring-machine. - Google Patents

Description

No. 757,734. 'PATENTED APR. 19, 1904.

' G. E. GADFIELD. BORING MACHINE.

APPLIOATIOI FILED JULY 17, 1903.

1m 110mm.

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CHARLES E. GADFIELD,

Patented. April '19, 1904.

PATENT OFFICE.

OF W'ELLINGTON, OHIO.

BORING-MACHINE.

SPECIFICATION forming part of Letters Patent N0. 757,734,. dated. April 19, 1904.

Application filedil'uly 17, 1903.

. To all whom, it Hung concern.-

Be it known that 1, CHARLES E. GADFIELD, a citizen of the United States, residing at \Vellington, in the county of Lorain and State of Ohio, have invented certain new andv useful Improvements in Boring-Machines, of which the following is a specification.

My invention relates to improvements in boring-machines; and the primary object of the invention is to produce a generally improved device of this class which will be exceedingly simple in construction, efficient in operation, and which will be better adapted to its intended purposes than any other device of the same class with which I am acqn-ainted.

The invention is especially designed for the use of electricians in'installing electric lights in houses, public buildings, &c., for boring horizontal holes in the stringers beneath floors and in floors close to washboards, in walls,

corners, and similar places where an ordinary brace cannot be used. It can also be used to advantage by plumbers, gas-litters, and others for boring holes for the reception of waterpipes, gas-pipes, 8:0.

With theseends in view the invention consists in the novel construction hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims.

Referring to the accompanying drawings,

forming a part of this specification, Figure 1 machine made up of a piece of gas-pipe or bicycle-tubing and provided at its lower end with a part of a T-pipe 2, screwed thereto, which is adapted to receive and form a bearing forv a reversible chuck 3, mounted 1 designates the main body portion of the.

Serial No. 166,064. (No model.)

therein, which said chuck 3 is provided with r a central opening adapted to receive at either of its ends the shank or head of the bit 4.

5 designates a set-screw for holding the same securely in position. Upon the other end of this chuck 3 is secured a sleeve or shoulder 6, provided with a set-screw 7 for holding the chuck 3 in its bearing and preventing lateral movement, and also for holding'the shank or head of the bit 4 in position when the'same is mounted. at this end of the chuck 3.. By removing this sleeve or shoulder 6 the chuck 3 may be reversed in the bearing 2. When it is desired to have the bit on the reverse side opposite that upon which the handle and sprocket wheels and chain are placed when boring overhead in side walls and similar places and when desiring to change the tool from right-handed to lefthanded, the set-screw 5 is loosened and the bit 42 reversed and mounted in the central opening of the opposite side of the chuck 3 andv the set-screw 7 tightened, holding the bit at firmly therein. Carriedby and mounted on the chuck 3 is a sprocket-wheel 8, by means of which the same is revolved, and which said sprocket wheel 8 receives its motion from a sprocket- ,mounted on a sleeve 0r ferrulell, adjustably mounted on the main body portion 1, near the top portion thereof, by. means of a setscrew 12.

Secured to the sprocket-wheel 10 in any suitable manner is an operating-crank 13, by means of which motion is transmitted to the mechanism hereinbefore described.

14 designates a sleeve or ferr ule adjustably lower end thereof, by means of a set-screw15. Secured in said ferrule 14: is a supporting arm or bar 16, designed to steady and support the tool when Working and toaregulate the distance of the bit from'the top of the timber upon which said arm or bar 16 rests.

Vi hen the chuck 3 is reversed in the bearposite end of the chuck 3, when it is desired to use the machine for boring in side Walls chain 9, passing over a sprocket-Wheel 10,.

secured to the main body portion 1, near the ing 2 and when the bit a is placed in the opv and when boring in side walls overhead and when otherwlse desirable or necessary, the supporting arm or bar 16 is removed or reversed, so as not to interfere with any position des1 red.

17 designates a lengthening and supporting bar adjustably mounted in the main body portion 1 by means of the set-screw 18 and having secured to the lower portion thereof or integral therewith a bracket or base-plate 19, which rests on the floor or ground when it is desired to use the machine in a vertical position when boring in side walls and for other overhead work. The lengthening and supporting bar 17 may be. removed, if desired, when not needed when used in the position shown in Fig. 1 and similar positions.

20 designates an auxiliary sprocket-wheel slidably and adjustably mounted on the main body portion 1 by means of a sleeve or ferrule 21, secured in any desired position by means of a set-screw 22.

Secured to the sleeve or ferrule 21 in any suitable manner or formed integral therewith are laterally and forwardly projecting arms 23, carrying on their ends rollers 24, which take over the outside of the sprocket-chain 9, holding the same in proper position and preventing said sprocket-chain 9 from jumping off of the sprockets of the sprocket-wheel 20 when the operating-crank 13 is secured thereto, as shown in Fig. 3 of the drawings.

It will thus be seen that when it is desired, by reason of certain positions in which it is desired to use the tool, to apply the source of power at a certain position along the main body portion 1 ofthe. tool the operatingcrank 13 is removed from the sprocket-wheel 10 and attached to the auxiliary sprocketwheel 20, as shown in Fig. 3, and the same may be adjusted to any desired position by means of the sliding sleeve or ferrule 21 and set-screw 22, hereinbefore described.

From the foregoing description, taken in connection with the accompanying drawings, the operation and advantages of my invention will be readily understood.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principles or sacrificing any of the advantages of this invention.

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

1. A boring-machine, consisting of a main body portion provided at its base end with a suitable bearing, a chuck mounted in said bearing, a sprocket wheel carried by and mounted on said chuck, a sleeve or shoulder secured to said chuck, an adjustable sleeve or ferrule secured to said main body portion, a sprocketwheel mounted thereon and adapted to carry an operating-crank, an auxiliary sleeve or ferrule slidably and adjustably mounted on said main body portion, an auxiliary sprocketwheel mounted thereon and adapted to carry said operating-crank, and a sprocket-chain passing over said sprocket-wheels whereby motion is transmitted to said chuck.

2. In a boringmachine, the combination with the main body portion provided at its lower end with a suitable bearing, a chuck mounted in said bearing, a sprocket-wheel mounted on said chuck, a sleeve or shoulder secured to said chuck, and an adjustable sleeve or ferrule secured to said main body portion and carrying a supporting-bar; of a second adjustable sleeve or ferrule secured to said main body portion, a sprocket-wheel mounted thereon, an operating-crank secured to said sprocketwheel, and a sprocket-chain passing over said sprocket wheels whereby motion is transmitted to said chuck.

3. In a boring-machine, the combination with the main body portion provided at its lower end with a suitable bearing, a chuck mounted in said bearing and provided with a sprocket-wheel, a second adjustable sleeve or ferrule secured to said main body portion and carrying a sprocket-wheel, and a sprocketchain passing over said sprocket-wheels; of athird or auxiliary sleeve or ferrule, carrying an auxiliary sprocket-wheel, slidably and ad justably mounted on said main body portion, an operating-crank secured to said auxiliary sprocket-wheel, and arms projecting from said auxiliary sleeve or ferrule and carrying rollers which take over the outside of the sprocketchain to hold the same in contact with the sprocket-wheel.

4. In a boring-machine, the combination with the main body portion provided at its lower end with a suitable bearing, a chuck mounted in said bearing and provided with a sprocket-wheel, an adjustable sleeve or ferrule secured to said main body portion and carrying a sprocket-wheel, and a sprocket-chain passing over said sprocket-wheels; of a sleeve or ferrule slidably and adjustably mounted on said main body portion, and an auxiliarysprocket-wheel mounted on said sleeve or ferrule and provided with an operating-crank.

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

CHARLES E. GADFIELD.

Witnesses:

J. T. HASKELL, R. HATHAWAY.

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