US1314888A - Albert w - Google Patents

Description

A. w. MITCHELL.

SNAP GAGE.

APPLICATION FILED Nov.2,191e.

1 ,3 1 4,888 Patented Sept. 2, 1919.

135 it kn'bwirtliat I, ALBERT W. LIITQHELL,

fthe inner insteadof head.

,1 ma t-m ALBERT W. MITCHELL, OFNEW HAVEN, CONNECTICUT, ASSIGNOR T0 'WINCHES'QER T nnrne rmehn viscm, tor nnwznnvnn, connnc'rrcum, A ,COREOBATION.M

SNAP-GAGE.

1,314,888 Specification of Letters Patent. I Application mea t e t r 2,1e s. Seria1No.2 60,7 8 8.

To all h o mjt maypo'ncera:

a di tijzeii of United States, 'residing at New Haven, in the county of New Haven and State offconnecticut, havefinyented a new and useful"lmprovement "infisnap- Gages; and I dohereby declare the following, whe 'ntdlxen in connection wlth the ace 'mpanying drawingshn'dthe characters of "reference marked there n, to'be a full, clear,

and exact "descriptionof the" same, and

Wt eh ai d ew he eeet wt e ja p pl catiomjand represent,

migure "-1 a view partly in ele vation, and partly "n sectio'n, of "a snap gage embodying myinvent ion.

;' Fig. 2a view tliereoftin left hand end i r 1 .JH. A 1 jFigQ3 a corresponding view in right hand end elevation. "'i planview of the adiest 'b tee er n -Pin 3 ig. '5 an endir iew thereof. I Fig. ,6 adeta'chedviefw of the jam screw l r,br g h f l u i i i 1 Fig. 7 a corresponding yiew of the adju ng sc ew it el n, ai l saseeeg edgeg ne of the weld a Inodi said head f and Fig. 14 is a corresponding view thereof in inside elevation and Fig. 151isga view in elevation of one of the modified forms which the frame of the "gage may My liny e 'en assume.

relates to an mproved the measurement, and to preventing a ile- '1 cor epandihe ew ,o th ep" pin of the r WhlCh the plug is of which projects plied Without danger to a rotating piece,'to

being sealed so that it cannot be tampered *with by the workman after beingadjusted, to providing for the exterior indication of y the sp rlnging of the frame by forcingthe gage on the work.

With these ends in view, my invention consists in a snap gage havin certain details of construction"and conibinations of parts as will be hereinafter described and "pointed out in the claimsj In carrying out my invention as herein shown, I employ a substantially U-shaped frame 2 having stifiening ribs 3, 1 and 5, and terminating at its ends in opposed alined cylindrical alined cylindrical plug-holes 8 and 9.

' The said hole 8 recelvesa normally fixed, but adju stable, measuring-plug 1O theinner end "of which proJcts beyond the inner face '11 of the head 6, and the outer end of which hasan axial screw-hole 12 countersunk as at 1 3." The outer end of the said plug is also formed with four radially arranged "slots 14 to permit it to be expanded by the tapering head 15 of the jam screw 16 by firmly fixed in place after it has been adjustedby means of a short adjusting-screw 17 for which the outer end of the hole 8is threaded." After the screw 17.has' been adjusted, it may be, and by sealed in'place by a sealing vthus 1 providing against any the 'gage 'by workman preference is, war: seal 18, tampering with after it has been set.

The plug-hole 9 in the head 7 receives a yielding measuring-plug 19 the inner end beyond the inner :face 20 of the head 7 and the outer end of which has bearing in the reduced outer end 21 of the hole 9; A helical spring 22 encircling the stem 21 is interposed between the shoulder 23 of the plug and a shoulder 24: formed at the outer end of themam portion of the Patented Sept. 2, 1919. a

heads 6 and 7 having through the frame 2 enters a cut 26 in the adapt it to enter ajgnarrowj slot;v l'lhese plug 19, this cutbei'ng adapted in width figures willlsufliciently serve to illustratetwo to permit the required longitudinal play of of the manifold forms which the gaging ends th l Th te fiface 27 of 1the5he'a'd 7f ofithe vplugs;mayassume;v .If,.'-desired,-Fthe is I provided with a i-tolerance step. '28 the tolerance-step may befOrmedasatBQ upon depth of which isprecisely predetermined the inner face of'the head 7 mounting the to express the tolerance of thegage. yielding plug 19 the inner end of whi'chis In, using my improved gage, the plug 8 7 reduced by cutting its upper face away'as at is set, as required, by means of the adjust- "31 so as to form at its inner end -a shoulder ing-screw 17 which is then removed for 32 which cooperates with the tep 30 in using access to the jam-screw 16' which'is now the gage. r c Y turned to, spread the outer .end' of the plug In case it is desired touse-thegage for c and so firmly clam-p it position, The measuringirregularshapes,theheads sand; adjusting-screw is now returned to its place 7 will be suitablyfopposed, as sho'wngin Fig; and preferably sealed therein by means of 15,1'atherfthan alineid,"as'shown iilFig; I,

a seal of sealing wax, thus; preventing actheconstruction and operation .of 'the gage, gcess-to the adjusting-screw except as the remaining otherwise unchanged."

wax is broken. 7 After the plug hasbeenset I claim: I i as described, the device is ready for use, :If .1. In a snapg'age,theicombinationwith a when the-gage ispressed against the work, substantially U- shaped frameproyidedwith no the yielding; plug 19 is pushed outward twon opposedheads. having plug holes' ofia; againStthe-tension of the spring 22 so that normally fiiiedj iadjustable ine'asur'i'iifgplug its reduced stem 21 projects beyondjlthe mountedinone ofi the' saidheads, andfa; tolerance step 28, then; the objectbeing yielding measuring plug mounted in lthe gaged is rejected asexceeding the maximum other the headreceiving l he said, yielding allowable demensions. If, on thekother plugberg formed .at, one'end with jer hand, the outer end of the stem 20 jfalls ance-step. ff j within the plane of the inner end of thestep, 2. Ina snap gage, the combinationiwit'h a then the object being 'gaged is rejected as substantially U-shaped frame providedwith being below the minimum allowable ditWoopposed heads havingplug-holes; of'a mensions. l o j V normally fixed adjustable measurin'g plug It will beseen from the foregoingythat mounted in one of the said lieads, and a my improved snap gage utilizes but one pair yielding measuring plugf V-mounted the of measuring-plugs for;measuringmaximum other, one end vofthe 'yielding plugbeing' and minimum dimensions;v wl'lereas, for used by direct contact withithe workffor if *merly, twopai-rs of plugs or their equivagaging and its opposite end'lfbeing used for lents have been used. On account] of the measuring, ,p T p, "f a {yielding character of one of; the plugs of 3.1,In a snap gage, the'coinbination with a improved o-age," the same may be. 'ap-' substantially ru shaped'frame providedwith V.

' plied with perfect safety to a moving obtwo'opposed heads havingfplug holes,of1a.g"

ject; Without danger of' ;having,the gage normally fixed adjustable measuifiiig plug jammed and wrenchedout of the hand, of mounted in one of; the said heads,Land a" V 1 1 the user Also onaccount of the yielding yieldingmeasuringpiug mounted in the character of one of the plugs,=there .is;no other, the inner endl ofrthe yielding-plugba 7 strain thrown on the frame of the gage ing used by direct contact with thejwork for tending to spread it and thusdestroy theingaging and its outer end; beingfusjed. for

/ tegri'ty of the gage as ameasuring instrumeasuring. j l f c ment. By utilizing the innenend of one-plug .7 4. In a snap gage,1the 'combinati0n withja I f i d ph r r-rend for. measuring, substantially U-shapedframeprpvidedwithh 1 I secure-superior convenience, the measuretwo opposed headsfhaving plugholes, ofia mejnt being determinedeither visually or normallyfixed adjustable measurin'grplug tactually. v a H r Q mounted linone ofthe said heads, and' a My-improved snap gage, of course, is'not ,yielding"fmeasuringplug' mounted [jin the limited to the use of plugs whose -inner or 1 other, 'theouter facebf thejhead inounting gaging ends are like those ,of the plugs 10 the said yielding-plug being formed with-a and 19'. On the; contrary, the gaging'ends tolerance-step. .7 r i; of the plugs will be shaped in accordance 5.. In a snap gage,thejconibination witha with the character of the work to be gaged; substantially U-shaped frame provided with :'for instance, Fig. 11 shows a plug'lO havin two opposed heads having plug-holes, of a its inner or' 'aging end formed witha relanormally fixed adjustable measuring-plug tively large disk for .use in gaging spherical mounted inr'oneof the said heads'andhavinghole 9. A stop obj ects, while the yielding-plug19 of F igQ 12 pin 25 passing transversely its outer. end formed .with a countersunk gagingendchisel-shaped as at 29, to

screw-hole and slotted, a jam-screw located Specification in the presence of two subscribifn the said screvlv-hiole, an iLdjIiIStiEII%'-SCI'GWK ing Witnesses. '01- en zwin Wit 1 t 1e outer em 0' t 1e sai 1 jam-sa re? 3 seal for the said adjustin ALBERT MITCHELL 5 screw, and a measuring-plug located in tie Witnesses:

plug-hole of the other head. ERIK PALMER,

In testimony whereof, I have signed this GEORGE D. SEYMOUR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C.

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