US548773A - Chuck - Google Patents

Description

(No Model.) v 2 Sheets-Sheet 1.

T. E. CHERRY.

CHUCK.

I No. 548,773.

Patentedoet. 29, l1895.

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` i UNITED STATES :PATENT OFFICE,

THOMAS E. CHERRY, OF BATH, MAINE.

CHUCK.

sPncIFIcA'rroNrorming para of Letters Patent No. 548,773, dated october 2e, 1895. Application iiled October 30, 1894:'. Serial No. 522,411. (No model.)

Bath, in thercounty of Sagadahoc andState of Maine, have invented a new and. Improved Chuck, of which the following is afull, clear,

and exact description.

My invention relates to improvements in lathe-chucks, and the object of my invention is to produce a very simple and substantial chuckwhich may be applied to an ordinary lathe-spindle, which has the usual arrangein such a way that the jaws may be very quickly adjusted and firmly fastened, and which has the jaws and mechanism arranged so that face-plate work-such as sheaves,-

bushings, gears, &c.-may be very advantageously held.

To these ends my invention consists of certain features of construction and combinations of parts, which will Vbe hereinafter described and claimed.

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

Figure 1 is a broken sectional elevation on the line 1 1 of Fig. 2 of my improved chuck, showing the back side thereof. Fig. 2 isa central longitudinal section on the line 2 2 of Fig. 1. Fig. 3 is a cross-section on the line3 3 of Fig. 2. Fig. 4 is adetail section on the line 4 4 of Fig. 1 and shows the arrangement of one of the sliding jaws and the lever mechanism for moving it, and Fig. 5 is a broken face view of one of the jaws and of the adjacent portion of the chuck.

The chuck-body 10 is of the usual circular shape, and it is provided with a central sleeve or hub 11, which is counterbored and screwed to the collar 12, which is fastened rigidly to the ordinary spindle 13-of the lathe. The

lathe has also the usual arrangement of ra-y dial jaws 14, having the customary notched faces, but the jaws are hung in a novel man-V ner, so that they maybe quickly worked and firmly clamped.

The jaws 14 slide in radial slots 15 in the chuck-body 10, and each jaw has a back plate 16 of steelwhich is widened near the center, as shown at 17 in Fig. 4, and this widened porn 11 andncollar 12, and there isa tion enters corresponding grooves in the sidewalls of the slotH 15,' so` as to prevent the disv placement of the jaw. The slide-plate 1G has at its outer end a boss 18, which enters a hole inthe jaw and is fastened to the jaw by a key 19, andthe jaw and slide-plate'are also held together by a screw 20.

In the back of each slide-plate 16 is a notch 21 to receive a tooth or lug 22 on a lever 23, which is fulcrumed on a pin 24, held in ribs 25 on the back of the chuck-body 10, and the inner end ofthe lever contacts with a gib 26,

which lies parallel with the spindle 13 and has a turned-up retaining-lug 27, which enters a groove 28 in the collar 29, which will be more specifically described below. The gib 26 lies on a wedge 30, which is longitudinally movable in a groove 31 in the sleeve or hub Y Y groove, wedge, gibfand lever foreach jaw 14. d

It will be seen that when the wedges 30 are drawn backward they will move outward the gibs 26,"which, acting on the levers 23, tilt the levers on their fulcru ms and force in the jaws 14, and when the wedges are pushed forward the reverse action takes place and the jaws are released. To enable the wedges to be powerfully moved and firmly held they are provided with threaded heads 33, which engage the threads on the inner edge of a ring 32, which connects by bolts 34 with the collar 29, and to enable the connection between the ring and collar to be easily made the collar is providedwith a connterbored annular groove 35, which is widened at one point, as shown at 36 in Fig. 3, to enable the heads 37 of the bolts 34 to enter the groove 35 and be properly adjusted, and after the heads are so Vadj usted the bolts may be tightened up and the ring 32 and collar 29 held very firmly together. The ring 32 is preferably provided with holes 38 to receive a wrench,'spanner, or other implement, so that the ring may be turned by it, if desired.

In adjusting the chuck the material Vto be held in the jaws is placed in position, and by slipping the collar comprising the ring 32 and collar 29 backward the wedges 30 are simultaneously pulled rearward and acting on the gibs 26`and levers 23 force the jaws 14 inward, so as to clamp the work, and-then by turning the aforesaid collar the faces of the wedges are IOO acted onand ythefwedges pulled vmore rmly rearward, and thus consequently-clamping the jaws upon the Work which they hold.

It will be noticed that the ring 32 vand co1- lar 29 form practically a single collar and are made in two pieces lfor convenience; :butx in the claims I shall refer to the two as a collar Having thus described my invention, I? claim as new and desire to secure by Letters Patent- 1. A chuck, comprising'abodyhaving acen f trai sleeve with external guidegroovestherein, sliding jaws on the chuck body, levers on the back of the chuck to operate the jaws, wedges held in lthe guide :grooves ftojengagegl the levers, and a screw collar to actuatef"the wedges, substantially as described.

2. A chuck, comprisingabody portionfhav ing a v.central hub with `longitudinal guidey grooves therein, jawssliding 'on Athe @chuck face, levers fulcrumedzon the back of '-thel chuck and operatively ,connected-with ythea jaws to slide them, wedges held inithe guide-l lgrooves to engage the levers,t'hewedges'hav 3 ing lthreaded ends thereon, andl are'volublel -collaron the chuck sleeve,.the M'collar beingi threaded to engage the heads lotthe'l-wedges,`

substantially as described.

3. A.chuck,.comprisingabody travi-nga cenlg trai hubor lsleeve with longitudinal guidel grooves therein, j awsislid'ableon Lthe .j face 'ofi the chuck, levers fulcrumed :on vthe back of 'the chuck and operatively connectedawithft-hel` sta-ntiallyas described.

5.-.A ,chuck comprising a body, movable jaws, a rotatively mounted screw threaded ring and wedges connected to said jaws and having screw-threaded portions to be-engaged 'by the screw threads of said -ring, substantia'lly as set forth.

'6. A-chuck comprising a body, movable jaws, arotatively mounted screw threaded ring, and wedges adj ustablyconne'ctedto said j awsand provided withfscrcw threaded portions 'tobeengagedbythe screw Athreads of vvsaid. ring, substantially as setforth.

' 7. A #chuckcomprising a body, movable jaws, a ycollar ha-ving av'recess, a rotatively mounted screwfthreaded ring, Wedges having screw lthreaded portions tofbe engaged bythe screwthreads "ofsaid ringnd gibs having yinclined faces engaged Vby the wedges, `said gibsbeingconnected tothe jaws and provided with-projections to vengage the recess in the collar, -substantially as set forth.

vTHOMAS E. CHERRY. lWflitnesses:

f A. B. Domaine, F. yW. WEEKs

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