US592904A

US592904A - Drill

Info

Publication number: US592904A
Authority: US
Publication date: 1897-11-02
Anticipated expiration: 1914-11-02

Description

(No Model. i 2 sheets-sheet 1.

Y C.,D. CUTI'S.

DRILL.

190.592.904. Patented Nov. 2,1897.

A Homey (No Model.) 2 sheets-sheet 2.

, o. D. CUTTS. f DRILL.

Na 92,904.. l Patented Nov. 2,1897.

WITNESSES NI/.ENTOR Atlomey IINTTED STATES PATENT Turcs.

CHARLES DAVIS CU'ITS, OF FORT FAIRFIELD, MAINE.

DRILL.

SPECIFICATION forming part of Letters Patent No. 592,904, dated November 2, 1897. Application led February 20, 1897. Serial No. 624,350. (No model.)

To all whom it may con-cern:-

Be it known that I, CHARLES DAvrs Corrs, a citizen of the United States, residing at Fort Fairield, in the county of Aroostook and Stateof Maine, have invented certain new and useful Improvements in Drills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled 4in the art to which it appertains to make and use the same.

My invention relates to improvements in drill-chucks, and has for its object to provide an ordinary hand-drill with a chuck designed to steady the same when it is applied to a pipe or similar article.

To the accomplishment of this object my invention consists in providing an externallyscrew-threaded sleeve with means for securing it to a bit-stock and with a chain-nut dezo signed to travel thereon and to carry a chainv encircling the object upon which it is desired to operate for the purpose of properly centering the drill and for insuring the accuracy of its operation.

Referring to the drawings, Figurel is a side elevation of an ordinary brace provided with a bit and with `my improved chuck as applied to a pipe, parts being in section. Fig. 2 is a top plan view of the chuck removed from thebrace.. Fig. Sis a similar view of the traveling chain-nut detached.

Referring to the drawings, 1 indicates the brace, 2 the brace-cap, 3 the handle, Ll the head, 5 the bit-stock, and 6 the bits, of an ordinary hand-drill.

In the form of drill illustrated the brace is designed to be swiveled upon the bit-stock and designed`tb`eintermittently connected Vthereto by pawl-and-ratchet mechanism 7 of well-known construction.

S indicates what I will termthe cylindrical sleeve of my device, which is externally screw-threaded and is provided near its upper end with a number of preferably diametrically opposite threaded taps 9, designed p for the reception of the threaded portions 10 of chuck-sleeve-securing thumb -screws 1l. The screws `11 are preferably provided with. heads 12, and have their extremities rounded, as at 12', and preferably polished, to prevent their cutting the neck of a bit-stock, against which they are designed to be screwed for the purpose of securing the chuck to an ordinary stock. Suitable locking-nuts 13 may be provided to insure the fixed adjustment of the screws.

14 indicates the traveling chain-nut, consisting, preferably, of a substantially circular body part 15, having a screw-threaded bore 16, and provided with diametrically opposite chain-grips 17 of any suitable character. The

,chain-grip illustrated is, however, a preferable embodiment of that element of my invention, consisting simply of a swivel 18, to which a chain is designed to be attached at one end, and a T-shaped slot 2O upon the opposite side of the nut designed to receive the free end of the chain and in which the chain may be locked at any desired length by turn-l ing it at right angles to its normal direction.

It will be seen that when the drill is desired to be employed for the purpose of tapping a metallic pipe or similar article it is simply necessary to slide the sleeve 8 over the bitstock and secure it thereon by adjusting the thumb-screws 11 to bring their rounded ends 12 rmly against the neck of the stock, the adjustment of the screws being fixed by turning the locking-nuts 13 against the sleeve. The chain-nut is now rotated upon the sleeve until it assumes the proper relative position, and the bit having been directed against the pipe the chuck-chain is carried under said pipe and after being drawn tight is secured in the chain-grip 20. All strain upon the chuck-sleeve will be 'opposed by the frictional contact between the thu mb-screws 11 and the neck of the stock, as well as by a positive limiting-stop formed by the ledge 22 of the bitstock, against which the abutment-screws'll are designed to impinge. gresses in the course of the process of drilling the slack caused thereby in the chain 19 may be taken up by rotating the traveling nut 14, a very slight rotation being'necessary under ordinary circumstances to take up the slack produced during the drilling of a tap of reasonable depth.

I do not desire to of construction herein shown and described, but reserve the right to change, modify, or vary them at will within the scope of my invention.

As the bit prolimit myself to the details ICO l. In a drill of the character described, the combination with an externally-screW-threaded sleeve,of adj ustable sleeve-retaining mechanism, designed to retain the sleeve upon a bitstock,a traveling nut carried by the sleeve, and a chain adjustably carried by the traveling nut, substantially as specified.

2. In a drill ofthe character described, the combination with an externally-screW-threaded sleeve,of ab utment-screws carried thereby, designed to secure the sleeve upon abit-stock, locking-nuts upon said screws, a traveling chain-nut carried by the sleeve, a chain secured to 011e side of the traveling nut, and a chain-clamp upon the opposite side of said nut designed to adjustably secure the chain, substantially as specified.

3. In a drill of the character described, the combination with a cylindrical sleeve externally screw-threaded and provided with a plurality of threaded holes near of threaded abutment-screws piercing said holes and provided with rounded ends, locknut-s upon said abutment-screws, a traveling chain-nut provided with an internally-threaded bore designed to receive the sleeve, and with oppositely-extending chain-clamps, a chain secured to one of said clamps, and a T-shaped slot the other of said clamps being provided With and designed to adj ustably retain the free end of the chain, substantially as specified.

In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.

CHARLES DAVIS CUT"S.

Vitnesses C. L. RICHARDS, D. J. BELL.

one extremity, l