US996953A - Chuck. - Google Patents

Description

V. J. WAHLSTROM.

CHUCK.' APPLICATION FILED 0OT.1, 1910.

996,953, I Patented July 4, 1911.

' i tid BERNHARD T. BURCHARDI,

F BROOKLYN, NEVI YORK.

CHUCK.

Specification of Letters Patent.

Patented July 4., 191 i.

Application filed Gctober 1, 1910. Serial No. 584,799.

ivrith'these and other objects not specifi@ cally mentioned in view, the invention consiste in certain constructions und combina.- tie s which wiil he hereinuttei.' fully de- =i ,d rind then speciiicolly ,pointed out in the claims hereunto appended.

.in the accompanying drawings which 2e torni :i port ot this specification and in which like chzU-ncters ot reference indicate the saine perts, Figure i is :i central seetioinii i'iew ot' :i device constructed in :1ccm'dzinee with the invention, Fig. 2 is n.

seetionui views teken on the line 'dwg in Fig. l, si'iowing the jaws in differentpbsitions, Figs. 5 :ind t3 are pien views ot' one so oiij'he jaws showing the parts in ditterent positims, Fig. 7 is :i sectional view taken on the line 7--7 .in Fig. 5, and Fig. 8 is an end elevation of the jew shown in Figs. 5, 6 miei it. v

n the device selected to iliustrnte the invf ition, there is provided :i body S) having e rudizil siots l0 cut through its well. to trui aperture 'il adapted to receive e shank. The body is 'further provided shunk 12, driven or otherwise fasflevice to n. driil press or other n'ihchine further provided with 13 surrounding the body thereon. rlfhis sheil is prointernei eem feces 1i, and vion by ineens of two cops 15, 4ric shell and engaging rnbbets on the body 9. A spring 19 sectionui view taken on the line 2--2 in 1 `ig. 1. with the shank omitted, Figs. il und tfireA led therein., for the purpose ot attachingf4 is coiled around tlie body'within the shell, one end being fast to the, body and the other to the shell," :is indicated in Fig. l.

Thotportionof the device so fur described is old and well known in the nrt., und :i more detailed description of its construction deemed unnecessary to n full umlerstni'ulingif of the present invention, and is therefore omitted in the interest of brevity.

For the purpose ot clamping :1` tool in the centrul aperture 1l, there is provided n j uw, or plurality of jaws, working in the slots 10. lThis inw or these jaws may vary `within wide limits. .As shown, however,v

jaws Q0 nre provided, euch jaw having :i fiat face 2l on its outer end, and :1. 'recess Q9, on its inner end the purpose ofwhich will behereinufter explained. y

For the purpose oic producing.,r n movement of the jaw toward thir axis of the shell und center ot' the device, there is provided a wedge interposed between the jaw and one of the internul com trices it, :1nd this Wedge muy vary within wide limits. in certain constructions within the invention for instance, :i roller mightI be employed for this purpose. As shown, however, a wedge 23 is ei'ru'iloyed, this wedge havingr a. flat fece 24 engaging the renr face 21 oli' the jaw and :1. curved 'Puce Q5 engaging the internal cam fece 14. `When thei'shell 13 is rotated by' the spring 19, the internal cani face 14 slides by the curved tace of lthe wedge and forces it inward toward the center of the chuck.. During this movement,` the fiat face Q4 of the wedfey slides on th atlat face 21 of' the jaw. Owing to the angle at which these faces are out, n smal-l radial movement, produced by the internal com falce, is translated into a relatively large radial movement of the jaw toward the center of the chuck. This can be best understood by reference to Figs. 3, and 4. In Fig. 3, the jaws are shown in Wide open position and ready to receive between them a drill shank of the largest size Within `the capacity of the device. i ln Fig. 4, the jaws are shown in their inner, or closed position on a very snnilt drill shanln "While, in certain constructions, the jaw might be relied upon to clamp the tool shank vby direct contact; inthe best constructions t and as shown, a tool gripper carried by the jawis employed. This gripper, marked 26, is a segmental rocking gripper and is seated in'therecess 22 of the jaw, as clearly shown in Figs. 3 and 4. It is provided with fingers 27 which interlock with fingers 28' on the jawQO. The bearing face 29 of each gripper is cam shaped so that the grippers are, by contactwith a tool shank, caused to tightly clamp a tool shank in the aperture l1 in a well known manner.

i -The upper ,and lower ends of the jaws 20 yare provided with segniental` channels 30- gether. For the purpose of holding each gripper in open or inoperative position, a

spring 33 is provided. One .end of this spring is secured in the jaw and the othei.1` end in the gripper, Figs. 5 and 7. IVhen a plurality of jaws and griiippers are employed, eachl gripper is provide with an upwardly projecting stud 34 which vengages one of the slots 35 cnt in the lower face of a plate 36 centrally located in the upper part of the aperture l1. The mechanism just described serves to control the rocking movement of the several grippers and insure uniform `movement of the same so that a tool shank lwill always be centrally clamped in the aperture.

In view of the foregoing, a detailed description of the operation of the device 1s deemed unnecessary and is therefore omitted in the interest of'brevity.

Changes and variations may be made in the structure by means of which the invention is carried into effect. The invention, therefore` is not to be restricted to the pre- `cise details of the structure shown and described.. f

W'hat is claimed is:

1.1In a chuck, the combination'with` an annular shell having an internal cam face, of a jaw movable toward the axis of the shell, a floating wedge interposed between the cam face and the jaw,A and a tool grip per carried by the jaw. j

2. In a chuck', the :oinbination with an annular shell having. an internal cam face, 0f

a jaw movable toward the a'xis of the shell,

a floating wedge interposed between the cam face and the jaw, and a rocking tool gripper carried by the jaw.

3. In a chuck, the combination with an annular shell having an internal cam `face, of a jaw movable toward the axis of the shell, a fioating wedge interposed between the cam face and the jaw, and a rocking tool gripper pivotally carried by the jaw.

4. In a chuck, the combination with an annular shell having an internal 4cam face, of a jaw movable toward the axis of the shell, a floating Wedge interposed between the cam face and the jaw, a rocking tool gripper, and a pair of annular caps engaging the ends of the jaw and gripper to pivotally:

hold them together.' j

5. In a chuck, the combination with an annular shell'having` an internal camy face, of a jaw movable toward the axis of the shell, a floating wedge interposed between and arranged to slide on the cam face and `the jaw, and a rocking tool gripper carried -by the jaw.

6. In a chuck, the combination withan annular shell having a plurality of internal cam faees,'of a plurality of jaws movable toward the axis of the shell, a plurality of oatingwedges interposed between the cam faces and the jaws, a plurality of rocking tool grippers one carried by each jaw, and means connecting the grippers whereby uniformwmovement of the same is controlled.

7. ,In al chuck, the combination with an annular shell having a plurality of internal cam faces, of a plurality of jaws movable toward the axis vof the shell, a plurality of floating wedges interposed between the cam faces and the jaws, a plurality of rocking tool grippers one carried by each jaw and each provided with a4 stud, and means engaging the studs whereby uniform movement of the grippcrs is controlled.

8. In a chuck, the combination with an annular shell having a plurality of internal cam faces, of a plurality of jaws movable toward the axis ,of the shell, a plurality of fioating wedges interposed between the cani faces and the-jaws, a 'plurality of rocking tool grippers'one carried by each jaw and each provided with' a stud, and a plate hav'- ing a series of slots engaging the studs whereby uniform movement of the grippers' is controlled.

9. In a chuck, the combination with a movable jaw, of a rocking tool gripper, and a pair of-annular caps engaging the ends of the jaw and gripper to pivotally hold them together.

10. In a chuck, the combination with an annular shell having an internal cam face, of a jaw movable toward thel axis of the shell, and a floating wedge interposed between the cam face and the jaw and having a flat face engaging the jaw and a curved face engaging the cam face.

11. In a chuck, the combination with an annular shell having an internal cam face, of a jaw movable toward the axis of 1die shell, a floating wedge interposed between the aw and cam Aiucc, and a segmental tool gripper pivotally carried by the jaw.

12. In a chuck, the combination with an In testimony whereof, I have signed my` annular shell having an internalcam face,of' name to =this speeication in thepresence a jaw movablel toward the axisof the shell, of two subscribing Witnesses.

a Hoating Wedge interposed between the jaw VERNER J. TNAHLSTROM. 5 and earn face, and a segmental tool grip` VitneSSeS:

er interlocked with and p'votally carried J. D. H. BERGEN, y the jaw.

H. OTTO CLAUSEN.

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