US610455A

US610455A - James mcsweeny

Info

Publication number: US610455A
Authority: US
Publication date: 1898-09-06
Anticipated expiration: 1915-09-06

Description

No. 610,455. Patented Sept. 6, i698. J. MCSWEENY.

HAND DRILL.

, (Application filed Aug. 10, 1897K) Nn Model,.-

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ATENT Prion.

I JAMES MCSWEENY, OF PITTSFIELD, MASSACHUSETTS, ASSIGN OR ATO THE E. D. JONES dz: SONSCOMPANY, OF SAME PLACE.

HAN D-DRILL.

SPECIFICATION forming partl ofi-Letters Patent No. 61(1),455, dated September 6,v 1898.

Appleman Vfiled Anglia 1o, 1897.

To all whom it may B01/06770:HV

Be it known that I, JAMES MOSWEENY, of Pittseld,in the county of Berkshire an d State of Massachusetts, have invented a new and Improved Hand-Drill, of which the following is a full, clear, and exact description.

The invention relates ,to hand-drills such as shown and described in the Letters Patent of the United States, No. 573,231, granted to me on Decemberl, 1896. i

The object of the present invention is to provide a new and improved` hand-drilldesigned for use either as a clamp or as a ratchetdrill and arranged to permit the operator to regulate the feed with great accuracy in a very simple manner to preyent breaking of the drills, especially when boring or breaking through the material.

The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

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

Figure l is a side elevation of theimprovement arranged as a clamping-drill and with parts shownvin section. Fig. 2 is a side elevation of the improvement arranged as a ratchet-drill and with partsin section. Fig. 3 is an enlarged sectionall side elevation of the holding device for the spindle-nut.A Fig. Il is a perspective View ofthe clamping-collar of the holding device, and Fig. 5 is a sectional plan view of the device for turning the spindle in either direction.

When the device is used as a clamp-drill, as shown in Fig. 1, I provide a suitably-constructed clamp A for fastening the tool to a table B or other support, and in the said clamp A is held vertically adjustable a threaded post C, carrying at its upper end a head D, in which is adjustably held a supporting-rod E. The supporting-rod E is provided at one end with a fork E', in which is hung on trunnions (shown in dotted lines in Fig. 1) a casing F, containinga nut G for a threaded spindle H, carrying a chuck I,` containing a drill I.

On the upper end of the spindle H is keyed or otherwise fastened a toothed wheel J, en-

Serial No. 647,103. (No model.)

gaged by a spring-pressed pawl J', held in a casing J2, mounted to rotate loosely on the upper end of the spindle and engaged by a handle J 2, under the'control of the operator, for turning the spindle in either direction. This device is more fully shown and described in the patent above referred to, so that fur thur description thereof is Vnot deemed necessary. .l

` The upper end o f the nut G within the casing F is engaged bythe lining K of a split clamping-collar K, formed at its lower` edge with a slot K2, engaged by a lug F in the recessed upper end of the casing F, as is plainly indicated in Figs. 1 and 3, so that the collar is prevented from turning. The lining K is made of brous wood, leather,yor other suitable material to properly clamp the nut G, so as to hold the latter in place when the 4split collar is closed. For this purpose Ilmake part of the outer face of the collar Kjconical. as at K3, and this face is engaged by a simi-y larly-shaped inner surface L' of a nut L, screwing in the upper. endo'f the casingvF, with the head L2 of the nut extending above the casing, so as to be readily taken hold of by the operator for screwing the nut down or up in the casing and clamping the collar K against the nut G to hold the same in place or for allowing the nut. G "to turn loosely in the casing F with thespindle H.

The lower end of thevn'ut G is formed with a head G', containing a vball-bearing G2, engagingthelower end of the casing F, the said head extending to the outside of the casing to be conveniently. taken hold of bythe operator for turning the nut G and the spindle H whenever desired. On the upper end of the nut G screws a retaining-collar G2, the lower edge of which rests on the upper end of the collar K, so as to hold the several parts in place within the casing F.

When the nut L is screwed upward to release the collar K from the nut G, then the latter is free to turn with the spindle H in case the drill I meets with unusual resistance, such as is frequently met with when boring through the material. that when the nut G turns with the spindle H no feed takes place at thetime, and vthe operator, upon turning the nut by taking hold It is evident IOO of the head G', can sufiiciently feed the spindle the material without danger to the drill.

When the nut L, however, is screwed downward, then the split collar K is tightly closed upon the nut G, and as the said collar K is held in place in the casing F it is evident that the nut G is locked in position within the casing, and consequently the spindle H when turned screws in the nut and correspondingly feeds the drill I in the material. If

the resistance to the drill, however, is greater than the clamping power of' the collar K on the nut G, then the latter will turn with the spindle, so that the feeding is stopped or partly so, to prevent breaking of the drill. This is very essential, especially in drilling steel and other hard metals, as the drill of ordinary machines is liable to be caught and injured when breaking through the material. With the improvement describedthe frictionfeed can be instantly thrown off at the time the point breaks through, and the remainder of the hole can be bored by the operator turning the nut G' by hand with greater or less rapidity, as the case requires.

By hanging the casingF on trunnions in the fork F. of the rod E the drill I and spindle H remain in the same position when at work drilling a hole whether the feed is applied to the spindle lightly or heavily.

When using a small-sized drill in soft metal and the feed is applied lightly, the threaded spindle C and the supporting -rod E will slightly spring, and when using a large-sized drill boring through hard steel the friction would have to be applied heavily to force the drill into the steel, which would cause the threaded post C and the supporting-rod E to spring, so that the spindle H and drill I would be thrown back out of position and the spindle H would bind in the nut G, andthe nut G would therefore bind in the casing F, which would make it almost impossible to work the drillingmachine. Therefore the machine would not work if the casing F did not hang on trunnions, as the binding of the nut G in the casing F would cause friction so great that the nut G would remain stationary in the cashing F, and therefore the threaded spindle H would advance to its work as fast as the thread on said spindle would allow, which would of course Wreck the drilling-machine provided power enough could be applied to drive said machine.

When the device is used as a ratchet-drill, as shown in Fig. 2, then the casing F is hung on trunnions on a suitable frame E2, and the lower end of the spindle H is provided with the usual ratchet-lever J4 for turning the spindle. The operation, so far as the feeding is concerned, is exactly the same as that above described in reference to Fig. l.

I do not limit myself to the particular friction device shown and described', as it is evident that other similar devices can be constructed to accomplish the same purpose.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A hand-drill comprising a easing, a nut mounted to turn in the said casing, a threaded spindle screwing in the said' nut, a split clamping-collar held stationary in the said casing and engaging the said nut, and a second nut in the said casing and engaging the said clamping-collar, to close or open the same, substantially as shown and described.

2. A hand-drill comprising a casing, a nut mounted to turn in the said casin g, athreaded spindle screwing in the said nut, a split clamping-collar held stationary in the said casing and engaging the said nut, a second nut in the said casing and engaging the said clamping-collar, to close or open the same, and a retaining-collar held on the upper end of the spindle-nut, and resting on the clamping-collar, substantially as shown and described.

3. A hand-drill provided with a casing, a spindle-nut mounted to turn in the said casing, a split clamping-collar held stationary in the casing, and having a lining engaging the said nut, the outer face of the nut being made conical, and a conical nut screwing in the said casing, and engaging the said clampin g-collar, to close the same upon the spindlenut, substantially as shown and described.

JAMES MCSWEENY.

Vitnesses:

R. B. BARDWELL, A. E. MALCOLM.