US259147A - Febdeeigk lee heughes - Google Patents

Description

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F. L. HEUGHES. V 7 HAND DRILLING MAGHINJEL v N0.'259,147. v Patented June6,1 882.

"ream illmxm mum ll mlmnl Ilium UNITED STATES PATENT OFFICE.

FREDERICK HEUGHES, OF ROCHESTER, NEW YORK.

HAND DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 259,147, dated June 6, 1882.

I Application filed January 14, 1882. .(No model.)

To all whom it may concern Be it known that I, F. L. HEUGHES, of Rochester, in the county of Monroe and State of New York, have invented certain Improve. ments in Hand Drilling-Machines, of which the following is a specification.

The object of this invention is to provide a cheap and serviceable machine in which a drill may be driven by hand with a uniform or steady motion.

To this end the invention consists in the peculiar construction and arrangement of parts hereinafter described.

To those familiar wit-h the subject it is a well-known fact that in order to secure the advantageous action of drills used for metalwork it is necessary that they should receive a uniform or unvarying speed. It is also well known that in hand machines in which a driving-crank is employed the motion of the crank is irregular and imparts an irregular motion to the drill.

The especialobject of my invention is to secure a uniform motion of the drill, and at the same time render the apparatus cheap and simple.

The drawing represents a side elevation of my improved machine, partly in section.

Referring to the drawing, A represents a standard or upright which is bolted firmly to a base-plate, and which has three horizontal arms, a b c, overhanging the base-plate;

B represents a vertical drill shaft or spindle, mounted in the arms'b and c, and pro: vided at the lower end with the usual socket to receive the drill 0. To the upper end of the spindle there is secured the lower arm of a hand-crank, E, the upper end of which is swiveled and arranged to turn loosely upon the lower end of a vertical feed-screw, F,

which is passed through the-upper arm, a, of

the standard, and provided on the upper end with a hand-wheel. By turning the wheel the crank,the spindle, and the drill may be raised and lowered. v V

In ordinary hand drilling-machines much difficulty is encountered because of the nature ofthe connection between the feedscrew and the devices turning thereon, it frequently happening that the partslock together, so that the rotation of the crank or other operating device causes the feed-screw to turn, thereby increasing or diminishing the feed in an objectionable manner. To overcome this difficulty I construct the feedscrew with a conical lower end and seat the same in a conical bearing in the upper end of the crank-arm E. The bearing maybe made of such size and shape that the feed-screw bears only at its extreme point, whereby all danger of the parts interlocking with each other is avoided. In order that the screw may lift the crank and drill when turned backward, the screw is provided at the lower end with a peripheral groove, 9, and the crank-arm provided with plate It, screwed thereto and fitting within the groove, as shown. By means of the crank motion maybe imparted through the spindle to the drill.

D represents a horizontal beveled-- gear wheel, secured firmly upon the spindle B, between the arms b and c, and arranged to gear into a beveled pinion, Gr, secured upon one end of the shaft H, said shaft being mounted in the standard A, and provided on the outer end with a heavy balance-wheel, I. The gear-wheel and pinion are of such relative size that the fly-wheel receives a number of revolutions during each rotation of the spindle and its hand-crank. Under this construction it is found that after the machine is set in motion the fly-wheel will counteract the tendency that the hand-crank has to move at a varying speed, and thus secure a uniform motion of the drill.

I am aware that hand-drills having balance-wheels have been constructed in many forms, and also that fly-wheels have been geared to drilling-machines in many different ways, and I therefore make no broad claim to either of the said features.

Having thus described my invention, what I claim is 1. In combination with the standard, thedrillspindle, hand-crank, and adjustable screw, the gear-wheel, pinion, and fiy-wheel, arranged as described and shown.

2. In a hand-drill, the combination of the drill stock or spindle, a hand-crank connected therewith, and a fly-wheel gearing directly to and driven by the spindle, as described and shown.

the crank having the tapered seat, the screw l having the grooved tapered end, arranged to hear only at its extreme point, and the plate 10 H, applied as shown.

FREDERICK L. HEUGHES.

Vitnesses CHAS. M. WILLIAMS, I. B. JAMESON.

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