USRE3121E - Chaeles h - Google Patents

Description

Planer Chuck..

No. 3,121. Reissued S'ept. 15, 1868.

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CHARLES EI.v RIGGS, OF WINDSOR LOCKS, CONNECTICUT.

Letters Patent No. 78,1432, dated iMag/'19, 1868; reissue No. 3,121, dated September 15, 1868.'

IMPROVEMENT IN PLANER-GHUGKS- TO` ALL WHOM IT MAY CONCERN:

' lBe it known' that I, CHARJLES H. RIGGS, of Windsor Locks, Hartford county, State of Connecticut, have invented certain new and useful Improvements in Planer-Chucks; and I do hereby declare that the followingis a full and clear description thereof, reference being had to the accompanyingA drawings, and to the letters of referencemarked thereon. Y

' In the drawings- Fignro. 1 is a plan view,

Figure 2 is a side sectional'view,

.Figure 3 is a sectional end'view, and

Figure 4 is a detailed view of a partoi the same.

The object of" this invention is to produce a chuck by which can be obtained two distinct results, hitherto unattained, viz, quickly and easily securing the stock, and securing it without rapping down, and then bringing the stock to the action of the cutter at any desirable angle upon a horizontal plane, by merely rotating the body of the chuck upon its base, a. scale of angles being marked upon the body of the chuck, to give accuracy to the movement, this scale being marked at the contiguous edgesv of these two parts, 't'. e., the bod;Y and the base.

In construction, the chuck proper is formed upon the plate K, which rotates upon the base, L. The plate -K is formed with a stationary'projection, C, on one side, and a fixed jaw, A, on the opposite side, a movable jaw, B, traversing between them. i In the projection C are round or dove-tailed'adjustable nuts RR, into which are tted screws, JJ. The"`peculiar arrangement and construction of the movable jaw B and its auxiliaries, and the manner in which it is operated by the nuts R R and screws J J, form the principal part of my invention, producing the specific results heretofore mentioned.

In explaining this construction and arrangement, I will first enumerate in order the peculiar qualities of these parte, and results obtained by them, more particularly, and then enumerate the means employed to produce them: y

VI. The jaw B can be clamped at any desired position, by simply turning a shaft running lengthwise through it, the position including an inclined one,in regard to the fixed jaw A, as well as a parallel one, as tlf'e jaw B mayvbe'set at amangle with the jaw A, either way.

II, It clamps the stock between itself and the jaw A, holding it down at first pressure.

III. The screws J J, which force-the jaw B against the stock, are so arranged'thatthey assist the jaw B in its operation of holding down the stock. I

IV. The action of clamping down the jaw B draws the stock down to the faceof the chuck.

The jaw B has, running'lengthwise thronghit, a. shaft, Il, each end of which has a square bolt-head, for

i the purpose of turning' it ateither end ofthe jaw by means of a wrench. l Connected with this shaftand extending downwards through the lower side of Yit, are eye-bolts, E E. These enter through pa'rallel slots, I!"- .andI-l, crossing the face of the chuck, and have round nuts, G G, on their lower ends, which play in grooves, H

and H, made for themunder the slots F F. l v By turning the shaft I), which has two eccentric-surfaces up'on' it, at a and a, upon which the eye-bolts E and are arranged at their upper ends, the latter. are drawn upwards bythe eccentric mot-ion of the parts a and a of the shaft, and press their nuts G andG against the top part of their grooves H and H, clamping th jaw Bin `the position it may perchance be placed. l l In order to prevent the grooves H H from being clogged up by chips and other foreign mattenthey are ,provided with. openings, b b, &c., in; the side, which also -aiford an opening for screwing up the. nuts G and G, whenthey, as well'ns the grooves H H, become worn by use and n eed tightening, the nuts being made round, with holes in their perimeters, for this purpose.

In order to iaccomplish the clamping of the jawB at an agle,.the depressions or cavities cl d on its under side are made longer than the width of the/.eyes of thebolts E and E, the extra length being on the outside edge of the eye from towards the centre 'of the shaft, when the jaw is straight or-parallel to the projection C and fixed `jaw A. The eye-bolts iit close to the inner face of the depressions or cavities dd, thus leaving room' for them to bear further apart, when the jaw B is placed slantingly.

vInorder to preventfthe tendency of the jaw B to tip up, when pressed against the stock by the screws JJ,

I place the shaft out of" centre laterally, so that its centre is aboutone-third distance from the front face of the jaw or face next to the stock ot' -the whole width of the jaw, and as the screws J `J are arranged in sliding nuts R R, their en'dsmay be pressed against the back face of the jaw, at a point considerably higher than the centre kof the bearing-surface of thestock, thus, in connection with the position of the ecc`entric-shaft D, rendering it impossible forfthe front edge ot' the jaw B 'to tip up, as the rentire tendency would be to press in an opposite direction.V

In ordinary chucks, the jaw B is made with the back facecut away, i'or the purposel of attaching it to theA face of the'chuckvwith bolts whose heads are brought below the level of thetop of the jaw. This leaves onlyr I a narrow edge for the ends of the'screws J and J to pressagainst, and they'liave no surface which is even elevated so far as the centre .of the jaw which they can .press against. v By connecting my jaw B with eye-bolts E and E through the .bottom,`.it leaves the back surface fully as deep as the front, enabling the screws J and J to nd a hearingsurfacc-anywhere in the height of'the bearing of the front face against the stock.

. Thus far I have described the top partor chuck proper.` This part, mounted on the plate K, is arranged upon a base, L, of thesame diameter as"the plate K,so that the upperpart can be revolved, whilev the base, L remains stationary upon the bed M, hereafter described. v

- -A central tapered stud, N, with a screw cut at the lower end, forms the pivot for the upper partof the chuck. This stud screws into the base, L, and remains stationary, while the upper part of the chuck turns upon it, a seat being made, correspondingly tapered, for it in the'body of the chuck.A As the seat and the stud-pin wear by constant use,.`the vwear may be compensated for by turning the p in, so as to unscrew it slightly out of the base, L, until it fits closely again, a slot being .cut in the top of the pin for the operation of a `screw-driver. l The scale is. eut upon the plate K and base L at their contiguous ledges'. y i The b ed M consists of a longitudinal plate, `with a dove-tailed groove, Q, running lengthwise through the centre and opening at the top. An'angle-iron, O, at each side of the chuck, performs the duty of clamping the chuck in position to this bed by means of bolts P, one toeach angle, these bolts having square heads at their upper. ends, where they pass through the horizontal arms' ofl the angles, and nuts at their lcwerends, which't into and slide in the groove Q, when the chuck is adjusted upon the bed. *"The upper ends of the angles t into 'a groove running around the perimeter of the plate K, and the lower ends slide in the groove Q, when the chuck is moved.' By turning the bolts P, so as to screw into the nuts at their lower ends, the angle-irons are clamped to the bed, and by them the chuck.

The screws J J, vforming the v se,'are arranged to pass through adjustable nuts R which slide vertically Yin dove-tailed grcovesiso that the points of thescrews may bear against whateverportion of the jaw lB vertically that may be desired. l

In iig. 4, the nuts-B. R are shown as being round, and 'itted into sockets formed in the projection C, so that' 'the `screws may be adjusted laterally as well as verticallyg'enabling them to press at right angles-tothe jaw B when it is clamped at an angle.`

vNow, having described'my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In combination with the movable jaw B and slotted chuckhed the eccentric-'shaft D,with `eye-bolts E E and nuts G G, arranged towards the front ofthe jaw, the jaw being constructedwith a back surface equally as high as the front or surface next to the stock, substantially as herein shown,- and for the purpose set forth.l

2. The device for fastening the chuck to the base-plate M,consi sting ofthe-plate K, withannular groove, bed-plate L, angle-irons O, threaded pin'B, with nut, and groove Qin base-plate'M, all constructed and arranged v in the manner described.

3. The arrangement of the round or dove-tailed nuts R R, screws'J J, stationary jaw C, and the movable jaw B, substantially as shown and s et` forth.

CEAS. H. RIGGS. Witnesses It. P. HYDE, E. H. HYDE.

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