US2509338A - Universally adjustable index for workholders - Google Patents

Description

w, WW A. K. ELMOTT, ET AL.

UNIVERSALLY ADJUSTABLE INDEX FOR WORKHOLDERS Filed Sept. 8,, 1947 Patented May 30, .1950

UNITED.

PAT-Eu;

509,338 umvensimt'iz mwsmz nmfrnbexron WORKHOLDERS" AlonzoiKnElliott and miebaam '11. :Munn; Indiana apolis, Ind.

"Appliatibh September 3} 194- 2,steam-112x94 I 1 Claims. (owl-+234) application Serial No. 658980; filed-April .2,1-1946; j

and entitled Unive'rsall-y l adjustable-Work holding means,-now Patent "-No. 22476361,.datedduly 19,

1949; as will be apparent- -frorn-a comparison oi Fig. *1 of the respective applications. l

' The r chief objectf the-:--present invention is to improve the invention eliselosed and-*claimed in said patent for it has bee'n; foundthat af-ter approximately two years daily use that the' conitr'ol bar andits-mounti ng1 collect diamondi dust which causes relative wear therebetwtaen-usuflie eient to introduce a minor-lerror sosthe structure isno-longer absolutely correct within the li'mits. of its original construction.

A corollary objective hereofvisnto extends the range of usefulness of therc'ontrol bar.

object seconda'n'y thereto is. torcomoine the stop and--1ook features of saiduapplication: disclosure and to extendsthe length of life ofi such composite-structure.

A further object of the present invention. is to extend the rangeaoi operationxzoicthe. first application structure by an "extensible and =uni-. versally adjustable. mount for rthe. micrometer thereof;

Other objects and ieatureszof thepresent inavention will be set forth more fully hereinafter.

The *full nature of P the inventionr will be undere motnteuam portion- 13 betweenthe bar a-nd barend is nlargedasindic'atedat I 6. Its periphery adjacent the forward 11 end "of portion 1-3 includes scale [1. Vernier devices at the quadrant'poiiit's as iridieated at sane: 1-9 are-also provided Eittetiding i onwar-dlyaiqdiat 45. on so tothe sleeve is arm wmen: terminates in -a -iiorward extension I that issuitably -socketed at 22 to pivdtally support-portion .23, salme beirigsup ported at .1124 1 upon an aax is transverse to and it it stood from the. accompanying: drawings andsthe following description: and I claims In the drawings, Fig. 1 is a perspective view of the preferred-embodiment of the invention;

Fig. 2 is. 31113921 elevation of the upper portion thereof and one larger scale.

Fig. 3 is a perspective view of the miorometer; its mount and associated end of thesupporting control bar and same. is taken oppositely with respect to Figul "aiid theiparts being disposed at 90 to the position shown in Fig. 1.

Fig. 4 is acentral sectio'n control bar and mount for same.

In Fig. 1 of the drawings herein m indicates a base portion from which at one end projects l'view through the upwardly the arm portion II and "the forward e extension 12. The rear face'a'nd bottom fate of portions 4 0" and -H are disposed transversely of each other for transverse mounting a's-- desired or-required. i

Portions H and I2 terminate in a barrel or intersecting the sleeve axis.-=- ..:Pontidn fi is'=rigid ti ith -bo'dy4 5 th'at tei'minates ins. .aperturedx tong ue -iBi A work support 21 is adjustably carriedbs; a :base 28 having apertured ears!!! taking 'tongued 6 therebetween. A el'amp 3U securesiisame together... A clalmp 31 seeures 23E2and M togethe'rJ 'Iihe aforesaid briefly describes isuch :portionsas areidentihabor similar. toiparts disclosed in 1 said applications The workihold'er can be adj u'sted' t'o andufrb uponzrm'ember. 28L. The. Jatterumay' be tiltably adjusted upon the axis of clamp- 311.

transverse axis ooin cident with theJaXis of clamp QJssandwthatJas stated is-'transverse to and inters'eots with t theiiaxisxof the: sleeve x i5. Work carried by r support 21. ica'n thus? :be accurately disposed fromztimerto timevas desired or required.

The iforwa rdzendbfrbar. 11,7568 Figs. 1 .and 3.1125 flattened as at 33. A collar 35 mounts clamp sorewss 36 -whereby lthe collar is clamped to the har -end; Theicollar includesw'neck 3:7 tapped "as M 381" An armw'39 includesshole 4D and counterbo're 4 I"-to'=acoonimodate vsharik fl' and-'head- 43 of awscrew, the threaded send o'f which I is threaded into necktie]; at*38;l

"TThenarmLBB is disposed parallel to axi's of bar olampediin #thei' desirediposition. Whenever desired or required a spacer sleeve 44 of igauge blocltr-t31pe1 niiy *be interposed between the heck and arm: This sleeve maybeone-half,an=inch,

seamen a'nd'ia half? "or two inches in length. Of coufse zan-appropriatez length: clamp -screw would be utilized with each sleeve.

The iouter end sxofif thewarm terminates in a socket il=5i and same'iandi arm 39 adjacent thereto is 'slotted at 46. Alclampiunit 41:servestocontractzthei socket upon the relatively stationary portion lii iof awmicrometer :49 having contact element 50.

collar portion I3 which mounts the control bar 8 Reference will now be had to Figs. 1, 2 and 4.

The bar I includes four quadrant disposed slots so that it can be locked in any of the four positions. This bar has its slots disposed from about the center to the rear end.

Sleeve |5 in which bar I4 is rotatably and slidably mounted in the bore 52 thereof has at the forward end 52*- a pivoted closure plate 53 so that when the bar is removed this hole is closed and dirt cannot enter same.

During work formation also, since the bar |4 completely occupies bore 52, no diamond dust or grit can enter said bore forward end, thus eliminating a source of wear incident to use. H

Since the grooves or slots 5| extend to the rear end of the bar l4, same can be disposed forwardly to a maximum amount.

As shown in Fig. 4, sleeve I5 is rotatably sup ported in bushing 54. The sleeve is rotatable therein by means of worm wheel portion 55 meshing with worm 56 actuatable by crank 51. The sleeve can be clamped as at 58, when desired.

Herein the portion l3 at its upper portion and near the rear end includes a way slot or groove 59. A U-shaped member 60 is suitably secured to portion l3 by screw 6| which also extends into bushing 54.

The confronting sides 62 of the U-shaped member have a slight taper (1). A wedge member 63 frictionally seats therein. The rear end thereof extends beyond member 60 and includes a depending tongue 64, the lower end of which seats in a groove 5| to hold bar M in predetermined angular position.

Threaded on the rear and projecting end of sleeve l5 at 65 is control ring 66 having T-slot 61 therein. Adjustably secured therein are stops 68 and 69. Herein, the exterior of U-shaped member 60 is tapered as at so that stops 58 and 69 may have line contact therewith. These stops are provided for repetitious measuring or work rotation upon the axis of the sleeve bore incident to crank operation when multiple cuts or passes are required and incident to blending of radii.

Wear of the stop occurs equally upon both faces of member 53 and both faces 62 so that bar centering will be maintained for many years of use. In other words, wear, as it occurs is automatically taken up. In the present instance member 60 serves as stops for stop members 68 and 69 and a self-centering seat for lock or stop 6364.

The structure disclosed herein operates sub stantially as disclosed in Patent No. 2,476,361 supra except as hereinbefore noted. Herein bar I4 includes arcuately spaced slots 5| with which locator 64 is selectively seatable when the bar is suficiently projected. When locater 64 is seated in a slot near the end remote from the bar end the slots terminate within the sleeve. Slots 5| bear a predetermined angular relation to micrometer base 35 locating flat portion 33. on said bar.

While the invention has been illustrated and The invention claimed is:

1. Work holding structure comprising a tubular base, a sleeve having a bore therethrough and r0- tatable in the base tubularity and a plurality of successively hinged members, hinge means connecting one of the members to the sleeve, the hinge axis of successive members being disposed in transverse relation, the sleeve rotational axis and the hinge axis of the hinge means intersecting, a control bar adapted for micrometer support and rotatably and slidably supported in the bore of a sleeve, the micrometer support portion at one end, of the bar having a plurality of elongated parallel slots therein at least near the other end and terminating at that end, and a slot receivable locator carried by the base and selectively receivable by any parallel slot and anywhere along the length thereof.

2. A structure as defined by claim 1 wherein there is provided means for reversely rotating said sleeve, adjustable spaced stops carried at the rear end of said sleeve and disposed oppositely with respect to said bar, and a locator support upon the base and selectively engageable by the stops for limiting reverse rotation of the sleeve by the reversely rotating means.

3. A structure as defined by claim 2 wherein the locator support comprises a channel member having sloping sides, the slope being towards each other and the rotational axis of the sleeve, the locator having a body portion with complementary sides seating in the channel member and terminating in a tongue selectively seatable in a bar 4. A micrometer support structure for a work holding device substantially as described comprising a longitudinally slidable and step by step rotatable control bar, means for slidably and r0- tatively supporting the bar, a lock for determining the stepped position of the bar, an auxiliary base carried by one end of the bar, and a neck on the base and disposed transverse to the axis of the bar, an arm disposed in offset relation to that axis, a pivotal connection between one end of the arm and the neck, a clamp securing the arm and neck together in adjusted angular relationship, and a clamp type micrometer anchorage at the other end of said arm.

5. Structure as defined by claim 4 wherein there is provided between the arm and the neck a guage type spacer extension.

6. Structure as defined by claim 1 wherein the length of the bar slots is such that when the locator is seated in the rear end of a slot the other ends of the slots terminate within the sleeve.

7. Structure as defined by claim 6 wherein a cover plate is hingedly supported on the forward end of the sleeve immediately adjacent the base seated portion thereof for closing the sleeve bore at that end.

- ALONZO K. ELLIOTT.

THEODORE T. MUNN.

described in great detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character.

The several modifications described herein as REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS well as others which will readily suggest themselves to persons skilled in this art, all;are considered'to be within the broad scope of the invention, as defined in the appended claims- Elliott et a1 July 19, 1949

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