US334886A - Watch-maker s screw-driver - Google Patents

Description

(No Model.)

I 0.. L. NEAL. WATCH MAKER/8 SCREW DRIVER. F 4. 6. Patented Jan. 26, 1886.

WITNESSES INVENTOR Y zdgmwf ATTORNEYS.

N. PETERS, Phumuxhn m her, Wash'mglcll. D. C.

UNITED STATES PATENT OFFICE.

OLIVER L. NEAL, OF \VALTHAM, MASSACHUSETTS.

WATCH-MAKERS SCREW-DRIVER.

SPECIFICATION forming part of Letters Patent No. 334,886, dated January 26, 1886.

Application filed July 6, 1885. Serial No. 170,745.

To aZZ whom it may concern.-

Be it known that I, OLIVER L. NEAL, of VValtham, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Screw-Drivers and Drills, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is a rear elevation of one of my improved screw-drivers and drills, shown in position for use. Fig. 2 is an edge elevation of the same, partly in section, through theline x x of Fig. 1.

The object of this invention is to provide screw-drivers and drills designed especially for the use of watch-makers, and other operators employed on fine work, and which shall be so constructed as to turn the screw in or out at one movement.

The invention consists in the construction and combination of the various parts of the screw-driver and drill, as will be hereinafter fully described and claimed.

A represents a bar, to the side of the upper end of which is pivoted, by a screw, B, the upper end of a bar, C. .To the lower end of the swinging bar 0 is rigidly secured the end of a bar, D, which is curved in the are of a circle having its center in the axis of the screw-pivot B. The curved bar D has rackteeth formed upon one side, which engage with the teeth of the pinion-wheel E, formed upon or attached to the shank of the tool F. The rack bar D is held in gear with the pinion-wheel E by a keeper or guard, A, formed upon or attached to the lower end of the bar A. The ,lower end of the tool F can be a screw-driver bit or a drill-bit, as may be de sired. The upper end of the shank of the .tool F is inserted in a socket in the lower end of the bar A and has an annular groove formed around it to receive the end of the screw G, which passes in through a screwhole in the side of the lower end of the bar A, to keep the said tool in place in the said socket while allowing it to revolve freely. By this construction the tool F will be revolved by moving the bar 0 toward and from the bar A.

(No model.)

made suificiently light to allow them to be bent to fit the thumb and fingers of the operator.

In using the implement as a screwdriver, the thumb is inserted in the thumb-piece J, the forefinger is inserted in the thumb-piece I, and the second finger is inserted in the thumbpiece K. The bit of the tool F is then inserted in the slot of the screw with the bars A 0 close together when the screw is to be driven, and with the said bars wide apart when the screw is to be turned out, and the said bar C is moved from or toward the bar A, which turns the screw, the rackbar D being designed to have so many teeth that the screw will be turned fully in or out at one movement of the bar 0.

Vhen the implement is to be used as a drill, the bar '0 is moved in and out successively until the operation is completed.

If desired, the bar A may be provided with an ordinary tool-holder, so that the tools can be readily and quickly changed when desired.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A screw driver or drill constructed substantially as herein shown and described, and consisting of the bar A, the bar 0, hinged to the bar A and provided with the curved rackbar D, and the tool F, swiveledl to the bar A and provided with a pinion-wheel, E, engaging with the said rack-bar, as set forth.

2. The combinatiomwith a screw-driver or drill consisting of the bar A, pivoted bar 0,.

rack D, and swiveled bit F, carrying pinion E, of thumb and finger pieces, as I J K, attached to bars A O, substantially as set forth.

OLIVER 1L. NEAL.

WVitnesses:

JAMES BAKER, ORVILLE O. GORDON.

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