US1043098A - Tang-driven tool. - Google Patents

Description

- 1E. S. GROSS.

TANG DRIVEN TOOL.

-APPLIUATION FILED 002m, 19.11. y

` Patented-Nov. 5, 1912.

@wu wko/o l mer grasa; i @am :f

their avenants neer FRANK H. GREGORY, 0F HARRISHLURG, PENNSYLVNA.

TANGDR1VEN T0613.

Specification of Letters Patent.

Ratented Nov. 5, i912.

,Application led fletobexf,y 1911., Serial No. 853,283. v

To all whom it' may concern:

Be it known` that I, ELMER S. Gross, a citizen of the United States, and a resident, of `l-larrisburg, in the county of Dauphin and State of Pennsylvania, have invented new and useful Improvements in Tang- Driven Tools, of which the following is a full, clear, and exact specification, -suchvlas willv enable any one skilled. in the art to una dei-stand and use the invention as vherein described.

This invention relatesto improvements in' the tangs of tang-driven tools, and the sockets therefor, and it has for one of its objects the provision of a tool having a tang which consists of a plurality of wings adapted to be engaged by correspondingly-shaped abutments in either the spindle, or the chuck, or the driver-bushing and holder.

The invention has, furthermore, for its object, the peculiar organization or arrangel ment of such wings so that the tool can be entered into its socket only in certain positions.

Further objects of the invention will hereinafter appear and be particularly defined in the claims.

The invention has been clearly illustrated in the accompanying drawings in which similar characters denote similar parts, and in which liigure l is a front view of a socket and a tool held therein in accordance with my invention; Fig. 2 is a horizontal section thereof on line 2 2 of Fig. 1; 3 is side View of the holder, partly broken away, substantially on line 3 3 of Fig. l; Fig. t is a front View of the tool shank, peg se, and Fig. 5 is a top view thereof.

Referring to the drawings, 10 denotes the body of the tool, as for instance', a twist drill having a tapered shank ll, the upper end of which has a tang comprising in the present instance four Wings, 1221121), 12, and 12d. Of these, the wings 12a, 12b are in diametrical alinement in exactly the same manner as the ordinary tang in common use, while the other wings, l2, and. l2, consti tute side projections of the straight tang and are offset centrally (see Fig. 5,) and are consequently unalined. The several wings are formed on the roundtaper shank by a pair of milling cutters (as indicated in dotted lines in Fig. 5,) to such an extent longitudinally of the shank that the cut-depth remains uniform from the top downwardto about the line a.

ln order to accommodate or` provide proper driving `engagement between the tang-wings and the holder H, the latteris bored out round far enough, to substantially the extent shown in Fig. 3, while the upper port-ion of the holder body is onl slotted crosswise to correspond to the posl-A df tions and sizes .of the tang-wings, as at 13, 13b, 13C, and 13d, respectively. Hence there are established four abut'ments on the holder,`

yas le, 14", lac, led, which drive the respeetive wings.

. i From the foregoing it will be seen that Ta tool having the common tang may be v1used in my -improved holder, which, of

course, is also adapted to receive a tool provided with my improved tang. Further- "J5 more, that the ordinary socket needs only (in addition to lthe slot for the drifting key,) a pair of cross slots to adapt it for the reception of my. improved tang tool. Also, that the new tang-drive is practically S twice as powerful as the single-tang con struction, without interfering inthe least with the regular standard taper of the shank. l

-By reason-of the fact that the side wings 35 are off center there is gained the advantage of having the driving faces of 'the abutments near the line of force in which. the tool is rotated. Another advantage is that in case the ordinary .iiat-tang drill isl im used it will be driven by the heavier abutments of the socket or holder (see Fig. lt will also be noted that an ordinary fiatta-ng tool cannot be placed. into the socket into the cross-slots because the latter are out of register; therefore, it Imust be placed into the regular slots, which are high enough to permit the insertion of a drifting key to remove the4 tool. i

Changes maylbe made in the construction of the tang, especially asto the number and shape of' the wings, without departing from. the spirit of the invention as set forth in the' appended claims.

l. A tool or socket provided with a tapered shank having its upper end cut to form wings extending longitudinally ofthe shank and offset relatively to each other *lo diametricaily of the siiazilr,

2. A tool or socket provided wifh a ffi-v pered shank having :1 tang extending diu- 'lnetricully across the shank, and having wings extending to opposite sides thereof and offset relatively toeach other dianiefr rieulh of the shnnl 3. The combination with a tool having a hunk provided with a tang comprising wiugg's', und offset relatively to euch other glinnzetrieailly of the shank of a socket huving slof's extending through the body thereof und adapted to receive said Wings respectively.

-lp The combination With a` tool having :L Shank provided lwith a tang comprising Wings and offset relatively to euch olher danietrieully of the shank, of n Sockel hm ing slots extending` through the body thereof and adapted to receive seid wing, respeetively, one of said slots extending diametri :2e cally aeross the body and havingl :i grenier length than the other slolst and adapted lo receive a drifting` hey.

In testimony whereof l here Signed this Specification in the presence of two suhserih :fr ing,` witnesses.

' ELMER S. GROSS. Titnessesz WALTER E. .Kizveu'sm'mr C. L. TYSON.

Images