CA1139095A

CA1139095A - Dual dial indicating micrometer

Info

Publication number: CA1139095A
Application number: CA000339363A
Authority: CA
Inventors: Gregoire Larouche
Original assignee: Individual
Current assignee: Individual
Priority date: 1979-11-07
Filing date: 1979-11-07
Publication date: 1983-01-11

Abstract

Les indicateurs à cadran conventionnels, dont la précision est de l'ordre du millième de pouce et l'amplitude de l'ordre du demi-pouce, indiquent le déplacement linéarire absolu d'une tige faisant contacte en une seule de ses extrémités sur une surface, au moyen de deux cadrans circulaires gradués non-co-planaires situés d'un côté de l'instrument, tandis que l'autre côté sert de point d'attache de l'instrument. Le premier endran circulaire gradué dont la plus petite division est égale â la précision de l'instrument, est couplé à un longue aiguille actionnée par un arbre relié à un train d'engrenages. Ce premier cadran peut être mû et ajusté. Le second cadran couplé à une courte aiguille indique le déplacement cumulatif de la tige; la plus petite division de ce cadran représente cent fois la présision de l'instrument. La tige de contacte traverse le boîtier de l'instrument en deux points selon un diamètre. Ainsi la longueur de la tige de contacte et les dimensions du mécanisme d'attache de l'instrument sont des facteurs limitant son utilisation, notamment dans les espaces de dimensions voisines de le longueur de la tige. L'indicateur micrométrique double permet au lecteur d'observer des lectures identiques sur chacunes des deux faces principales de l'instrument. Le point d'attache est situé sur le côté du boîtier. Un tambour mobile ajustable (environ 80 degrés de rotation) à l'intérieur du boîtier, portant deux couronnes circulaires graduées, constitue une partie maîtresse de cet indicateur. Un petit cadran circulaire, indiquant le déplacement cumulatif de la tige apparait aussi sur chacune des faces. Tout ajustement effectué sur l'une des deux faces, est automatiquement et précisément reproduit sur la face opposée. En plus, l'instrument peut être calibré en permanence et ainsi servir de localisateur de surface lorsque fixé à l'arbre d'une machine-outil.Conventional dial indicators, the precision of which is on the order of a thousandth of an inch and the amplitude on the order of half an inch, indicate the absolute linear displacement of a rod making contact at only one of its ends on a surface, by means of two non-co-planar graduated circular dials located on one side of the instrument, while the other side serves as the instrument's attachment point. The first graduated circular endran, the smallest division of which is equal to the precision of the instrument, is coupled to a long needle actuated by a shaft connected to a gear train. This first dial can be moved and adjusted. The second dial coupled with a short hand indicates the cumulative displacement of the rod; the smallest division of this dial represents a hundred times the precision of the instrument. The contact rod passes through the instrument housing at two points along a diameter. Thus the length of the contact rod and the dimensions of the attachment mechanism of the instrument are factors limiting its use, in particular in spaces of dimensions close to the length of the rod. The dual micrometric indicator allows the reader to observe identical readings on each of the two main faces of the instrument. The attachment point is located on the side of the housing. An adjustable mobile drum (about 80 degrees of rotation) inside the case, carrying two graduated circular rings, is a key part of this indicator. A small circular dial, indicating the cumulative displacement of the rod also appears on each of the faces. Any adjustment made on one of the two sides is automatically and precisely reproduced on the opposite side. In addition, the instrument can be continuously calibrated and thus serve as a surface locator when attached to the shaft of a machine tool.

Description

MEMOI~E DESCRIPTIF

O Llindlcateur mlcr~métriqu~ doubl0 est un ln~trument s~rvant a me~urer avec une précision de l'ordre de un milllème de pouce, des d~placements lin~aires de l'ordre d~un demi-pouce et moins à l'aide d'une tige moblle sel~n son ax~, sur lnquelle est exerc~e mécRniquement une légère pressi~n axLale et dont une seule des extrémités vient en contacta avec 1~3b~ek à me~uror. Le~ in~
dlcateurs à cadrans con~entionnels aonnus de l'invent~ur, per-mettent de llre la valeur d'u~ déplacement a l'aide d'un~ gr~de couronne circulaire gradue~ tableS dont la plu9 patite ~ra-duation repréqente le préci~ion de l'ln~trument~ et d'une aiguil-indicatrice reliee a un train d'e~grsnag~; en plu9~ un plu~
petit c~dran ¢irculaire non c~plana~re, d~nt la plus petlte dir visio~ équlvaut à csnt ~ois la pr~cisi~n de l'instrument, couple à une aiguille reli~a auqsl au train d'engrenages, enré8i~tre le doplacament Gumulatlr de la tlge de ¢~ntacte. C~s ~ndic~teurs montrent une lecture ~ur un saul ~8té de 1'1nstrument; llautrs G8t~ sert a ~ix~r l~-point d~att~che de l'instrument. A C8 point d'attache, gé~éralem~nt un él~ment femelle~ il raut aJouter un slément r~le pour rendr0 l~in~trument adaptable aux bases ou supports conventi0nnels. L'snsembls de ces ments ds pi~otage ZO r~unis est très volumi~euxO Ce~ instrument~ po~eden~ une tige de contacte tr~ver~ant à mi-hauteur le b~tier ~alon un diam~tra;
cas point~ de traverse servent d~ paliers a la ti~a~ Al~r3~
l'extrémite de la t,ige peut dapas r 1~ bo~tier tout au moins dlune longueur pouv~nt etre ~g~le à lta~plitud~ de 19 i~stru~eat et de ce ~ait, aonstitue une limit~tion d~ns l~utilisation de ce-lui-ci. En plu~ des racteurs dimansionnels~ ~ans maints cas, ' ' ~ ': :, .. ..

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o hes nombreux dbplacement~ que doit e~rectuar :L'utilisateur pour li~
re 1~1nstrument~ con~tltu~ un inconv~nlent ma~eur de celui-ci.
L'indicataur micrométrique double expo3e la meme leoture sur cha-cune de 90g deux ~aces prinoipale~O Ch~que ~aoe comporte ~ne gran-de couronne clrculalre gradu~e~ coupl~3e a une longue aiguille ac~
tionnée par le train d~engrenage~ et un petit c~dran olrculaire gradué dont l~aigulll~ a9t au~sl rellee au train dl0ngrenages; oe petit o~dr~n indique le d~pl~ement oumulati~ da la tige de ¢onta¢-te. L'extrémit~ libre d0 la tlge de oontaote se termine ~ l~lnt~ri aur de llinstrument~ Le poi~t d'attaoha de lllnstru~nt, est un lo ~l~ment m~la solidaire du bo~tier et orient~ ~elon un diametre angle droit avec l~axe de 1R tige de contacte~ Ces caract~ri~ti~
que~ ra~e~blée~ en un 8eU1 instrument~ contribuent d~n~ une lar-ge m~sure ~ ~liml~er 1e9 inconv~3nients ~r~quemm~nt attribuees ~ux indicateur~ a cadran conventionnel~ L~indicateuP microm~trigu~
double~ e~t susceptible de produire de~ économie~ de temps consi~
dérablas, ~otamment dans le ca~ ou il e~t ~ix~ Q 11 arbre princi-pal de machine~outil~ dans le but de l~cali~er de~ ple~ devant . être maohinee~
Lss quatre figures suivantes lllu~rent l'invention:
~IGURE~ Vue de plan de l'indica~eur mlorom~triqus double~
FIG~RE - 2: Coupe mltoyenn0 par un plan hori~ont~l~
FIGURE - 3: Vue de ~oupe ~ la ~aotion ~A indlqu~0 ~ur la figure 2 ~I~URE - 4: Vue de plan montrant:
a) Plaque sup~rieure du ~raln dleng.renage~
b) Mode de ~ixation de la plaque au porte - a - faux~
c~ Rainura d~u~tement dan~ la plaque~ permettant le couplaga par~ait crém~illere-engrenage~

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O Note: I,e~ numero~ de raport utllise3 dsns la de~cription qui va suivre, peuvent etre re5rouves indiqtinctement sur llune ou l'autre deY ~igur~ msntlonnée~ ci-haut~
Voici une llste complete de~ numéros de report et leur attribu-tion:
l)Couverole~ MEMORY ~ E DESCRIPTION

O lindlcateur mlcr ~ metric ~ doubl0 is a ln ~ trument s ~ rvant a me ~ urer with a precision of the order of a milllem of an inch, linear displacements of the order of half an inch or less using a soft salt rod ~ n ax ~, on lnquelle is exerc ~ e mechanically a slight axial pressure and only one of ends comes in contact with 1 ~ 3b ~ ek to me ~ uror. The ~ in ~
dlcateurs with dials con ~ entional aonnus of the invention ~ ur, per-set the value of u ~ displacement using a ~ gr ~ of graduated circular crown ~ tables whose most patite ~ ra-duation represents the preci ~ ion of the ln ~ trument ~ and a aiguil-indicator connected to a train of e ~ grsnag ~; plus9 ~ most ~
small non-planar circular circuit, most small dir visio ~ equivalent to csnt ~ ois the pr ~ cisi ~ n of the instrument, couple to a needle connected ~ a auqsl to the gear train, enré8i ~ tre the Gumulatlr doplacament of the tactile rod. C ~ s ~ ndic ~ teurs show a reading on a saul ~ 8té of the instrument; others G8t ~ is used for ~ ix ~ rl ~ -point d ~ att ~ che of the instrument. At C8 point attachment, ge ~ eralem ~ nt a female element ~ it is necessary to add a slément r ~ le pour rendr0 l ~ in ~ trument adaptable to the bases or conventional supports. The whole of these parts of hostage ZO r ~ united is very volumi ~ themO This ~ instrument ~ po ~ eden ~ a rod contact tr ~ ver ~ ant halfway up the b ~ tier ~ alon a diam ~ tra;
case point ~ of cross serve as ~ bearings at ti ~ a ~ Al ~ r3 ~
the end of the t, ige can dapas r 1 ~ bo ~ tier at least dlune length can ~ nt be ~ g ~ le at lta ~ plitud ~ of 19 i ~ stru ~ eat and because of this, establishes a limitation when using this him. In addition ~ dimensional reactors ~ ~ in many cases, '' ~ '::, .. ..

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o hes many displacement ~ that must e ~ rectuar: The user for li ~
re 1 ~ 1nstrument ~ con ~ tltu ~ a inconv ~ nlent ma ~ eur thereof.
The double micrometric indicator exhibits the same leoture on each can of 90g two ~ main aces ~ O Ch ~ that ~ aoe has ~ does not-graduated clrculalre crown ~ e ~ coupl ~ 3e has a long needle ac ~
driven by the gear train and a small circular drive graduated whose ~ aigulll ~ a9t at ~ sl rellee to the gear train; oe small o ~ dr ~ n indicates the de ~ pl ~ ement oumulati ~ da ¢ onta ¢ rod -you. The end ~ free d0 tlge de oontaote ends ~ l ~ lnt ~ ri aur of the instrument ~ The poi ~ t of attaoha of lllnstru ~ nt, is a lo ~ l ~ ment m ~ secured to the bo ~ tier and orient ~ ~ elon a diameter right angle with the axis of 1R contact rod ~ These characteristics ~ ri ~ ti ~
that ~ ra ~ e ~ wired ~ in an 8eU1 instrument ~ contribute to ~ n ~ a lar-ge m ~ sure ~ ~ liml ~ er 1e9 inconv ~ 3nients ~ r ~ quemm ~ nt attributed ~ ux indicator ~ with conventional dial ~ L ~ indicateuP microm ~ trigu ~
double ~ e ~ t likely to produce ~ savings ~ of time consi ~
dérablas, ~ especially in the ca ~ or it is ~ t ~ ix ~ Q 11 main tree machine pal ~ tool ~ for the purpose of cali ~ er ~ ple ~ front . be maohinee ~
Lss four following figures lllu ~ rent the invention:
~ IGURE ~ Plan view of the indicator ~ eur mlorom ~ triqus double ~
FIG ~ RE - 2: Section mltoyenn0 by a hori ~ plan ~ have ~ l ~
FIGURE - 3: View of ~ oupe ~ la ~ aotion ~ A indlqu ~ 0 ~ ur figure 2 ~ I ~ URE - 4: Plan view showing:
a) Top plate of the raln dleng.renage ~
b) Method of fixing the plate to the overhang c ~ Rainura d ~ u ~ tement dan ~ the plate ~ allowing the couplaga par ~ ait crém ~ illere-engrenage ~

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O Note: I, e ~ report number utllise3 in the description which goes follow, can be found individually on the moon or the other deY ~ igur ~ msntlonnée ~ above ~
Here is a complete list of ~ carryover numbers and their attrib-tion:
l) Cover ~

2)Bo~tierO 2) Bo ~ tierO

3)Tambour~ 3) Drum ~

4)Couronne oircula ire graduéeO 4) Graduated oircula ire crown O

5)Plaque ~uperieurH du train d'engrenages. 5) Plate ~ uperieurH of the gear train.

6)Plaque inrérleure du kra in dlengrenage~0 6) Inrérleure plate of the kra in gear ~ 0

7)E~paceur~locali~ateurO 7) E ~ paceur ~ locali ~ ateurO

8)Verre ds montre~ 8) Glass in watch ~

9)AiguilleO
lO)~iguille du cadra n cumulatif q~
)Vi9 de ~tabili~atlon de la tige de oontacteO
12)Tige de loaalisation de la oouronne oirculaire graduée~
13)Support de la tige de oontacte~
14) Re.ssort~
15) Annsau de retsntion du re~ort~
16) Fermoir du suppor~ de la tige de conta¢te~
17)Tige de conta~te.
l~)vis du couvercla~
19)Support de l'instrumentO
20)Tige d'arret du tambour.
21 )~ngle maximum de dsplaoement du tambour~
22)Patta~ du tambour, 23~Cr~maillereO
24)Engrenage de la crémaillèreO
2~)Engrenage meneur~
26)~ngrenage central O
27)~n~emble engrenage-re~sort à oheveuxO

0 28 ) PG~int de f ixaki~n du rel830r t à ¢hevaux-29) Porte-à-f`aux.
30) Vi8 d~ an¢rage du pGrte~ ~QUX~.
31 ) Guid~ de la ~is de 9 ta~ a tion de la tlg9 de c~ntact~, 32 ) Palier de 1~ ~ngre~a~ge d~ la er~m~illarcO
33~ PRlier de 1~ erlgrenage ~sentral,, 34) R6cept~cle de 1' e~p~¢eur~-loc~ ateur~
35) Cadran circulaire cumula tif .
36) Palier de 1l ensemble er~grensge-resaort à oheveux~, 37) Rainure d~ustement dans l~q plaqueO
38 ) 'rige d~ loc~ ation du cel~uvre-plaque.
39~ Trou pour la tige dd locali~stlon du o~uvre-plaquaO
40) C~uvra-plaqueO
41 ) Ouv~rture pour introduire 1~ vi~ de ~tabillsstl~n de la tige de conta~ te O
42 ~ Ralnure d7 introducti~n de la ~ de a tabllisatlon de la ti~e de c~tact~ par rot~tierl de 1~ tiga ls~r~ de llss~eniblageO
I.'i~dio~teur mlorom~triqu~ double comprend tr~i~ en~ dl~tinck~:
~- Un ~ns~mbl~ ~olidalre compr~n~nt un t~mbour (3)" deu~c oouver~le3 (1), chacun ~tant relii~ au tambour par quatre vis ~18)" deu~: c~u-ronne3 circula~ res gradu6e~ (4) maintenue~ f'ermemsnt en oontaote ~ur le tamibour par la3 oou~Tercl0s~ deu:~ verres de montre(8)~, ~t deux ltige~9 de localisatlon de la co~r~rme ~ir¢ulaire grsdu~e (12)~
Cet enseIrible e~t a~ambl~ ~an~ lnter:e~renoe au bs3~tier (2)" ~lr lee qu~ 0uli~e~ et peut etre d~pl~c~ m~uellement (iOe., en ex~r-~nt un l~gar ~uple sur le c~uY~rcl~) sutour d0 Qon axea d' environ 8 O degr ~5 ( 21 ~ ,, 2~ Le ~3ec~nd ensemb:Le ~lldaire ¢smprend le b~Itier (2) inGorpora-lt le ~upporb (19) d~ :L' in~tr~ent, le support ~13 ) da la tig~ da c~n tao~e ~insi ~u~ le ~srmoir (16) ~u suppor~t de la tige da ¢ontacte~
1~ train d'~ngran~g~s (24), (25~ ~t ~27) avec ~e~ d~ux plaque~ au-,;
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O p~ri~ure (5) ~t inr~rleure (6) o~ le portts~ aux (29) reliant la bo~ tier au train d~ ~ngrenages ~t ~upportant oelul-c~ ~u ¢~ntre d~
1~ instrumerltO
3- Le troi~i~rQe en~cribla ~g3ti c~n~titu6 da la t~ge de ¢ont~ct~ (17) coulis~nt à 1' inté~eieur du ~upport d~ la tigo de ¢ontact~ ~t du rormolr (1~) du ~upport de la tigo d~ cv~tacte~ d~ un re~sort ( 1l~) ~xerg~nt une pr~lon axi31e sur 1~ tige de contacto~ un ann~au ( 15) do ret~ntlon du re~rt~ une ~i8 de 9tabili3at~0n (11) de la ~lga de cont~t~ at une crémaill~re (23 ) ~
LY tr~in d~ anerenag~s a¢tlonné pur la Gr~malllere (2~ comprend l'engr~nago de la cr~n~ re (24) et 11 engrenag~ meneur(25) ~olid~1 req d~ u2~ ~rbre portant ~ ohaoune de 9e~ xtr~mit~ une alguille (10) ~umell~a à un oadr~n ~irculaire cumulat (351" lo~ deu~c dits~ al-guilles ~s~t un~ dir~ction ~mmuno, le dit ~ngre~g0 meneur ~ction-~e l'engr0nage centr~l (26~ dont l~arbre ~upporte a cha~une d~ se~
oxtrémit~s une aiguill~ (9) ~u~ e 2 une c~ur~nn~ ciroulair~ gra-du~e (4), las dau~ der~i~r~ alguille~ ~y~nt une directi0~ G~Ua~
~t enrin, l'en3emblo on~ron~ge~r~ss~rt à cheveux (27) ~ngr~nant ~v~c 17 engren~g~ central~ Le rassort a che~ou~, ~voe une do 8~g ~xtr~
~it~9 reli~o ~ un point fi~ (28~ sur le porte-$-~au~ ~29) 0t l'au-tre à l'arbre qui le s~uti~nt, pr~dult un c~uple qui a~ure le c~n t~cto ccntinu~l entre 1~9 dents de toutes 1~ c~mp~santo~ du tr~in d~ engr~nage~ et de 1~ cr~maillere. Ainsl, t~ut m~uvement de la tl-ge, ~1 m~ime 30it~ est tra~smi~ intégralement à l'aiguille~
Ds~ espaceur-lac~lisatours (7) p~rmatt~nt de maintenir une di!~tan~
ce exa¢t~ ~ntre les plaque~ (5) et (6) ain~i que l'~nlignemant ~e9 palier~ de~ arbre~ ~u tr~in d'en~rs~ga~ (rer~ fig~3)o L~ plaque~
~upérieure ~5) e~ rieure (6) du tr~ (ref. f'lg.l~7 ~1 plug do contenir le~3 p81ier~3 (32)7 (~3) at (36)~ l~s d~ux r~c0ptaole~3 (34 de3 esp~ceur-l~c~lis~teursD 109 tr~u~i (39) ~or~ant 8 reCaVD:lr l~s tiges da looali~3atl~n (33) du couYre-plaqu~, c~nt~enne~t 19~ r~i ~, 6 ' - . '' ' :

O nures con¢entrique~ d'aJu~tement (~7)pe.nnettar~t un l&ger mouvemenk d~ 1~ ensemble du tr~in autour de 1~ axe ~ntra:L de celui-ola a~ln dl obtenlr un CQUpla~e p~r~Alt entre la cr~ma~ re ~23 ) ~t ~n ~n-grenago (24) . L~ pl~qu~ sup~ri~ure soul~mtsnb, a~t munl0 d' url0 ou-verture (41) p~rmettsnt d' ins~rer la vis de ~tabil:L~atlon de la ti~
ge de contaoto (11) 11~r9 de l~ssamblageO I.e eeuvr~-pl~qu~ O) est r~du sul:Ldaire ~es plaquea du train d' ~ngrenago~ au moyen de d~wc tiE e8 de locali~atisll ( 38 ) O L~ oou~r~l-plaque contient 1~ gradua -tions du cadr~n ciroulalre cumul~ tif~ ( ~5) .
L~ tambour (3~ a la re~e voisine d' un ~nne~u cylindriqu~ du~ual ~n a ooupé i mi-hauteur et de part et d'autre de 1~ axe ~0rtical ~u~q-qu'a une dist~nce d'environ un quart de pou¢e, une bande horizontale d~ haut~ur lég~rement ~uperieure ~u dia~atre de la tige d~ cont~tc (17) laiss~nt ain~i dou~ patt~ (22) dlam6tral~ment opposée~ n tourne 1~ tambour dans le sens horalre~ llu~ d'~lle~ re~contr~ le porte-à-faux (29 ) et dan3 le sen~ anti~horalre, 1l ~utre verr~ 18 tige d'arrêt du tambour (20) llmi~r ~on ma~uY~me~t, pr~v~n~ ~ln~l t~ut c~ntacte ~ la cr~ ro (23),, L~ rotatlon m~ximum du tam-b~3ur e~t d7 ealviron 80 degrés.
Le3 limite~q extr~we~ du mouv~ment de 1~ tige de c~ntacte (17) s~nt ~1-20 JC~5~,, d~ une diroctiGn, par l~ppul de l~nneau de r~tenti~ dur~s~ort ~15) ~ur le re~ort (14) complèt~ment GOmprim~ et danq l'au-~r~ diroctionJ par l'appui du m~me anne~u ~ur le rermoir du support de la tige de c~ntacte (16)~
L~ porte-a-faux e~t ~ix~ au b~ti0r 52) p~r trol~ Yi~ (30)O S~ parti~
oentralo~ 18 plu9 ~pai~s~, ~ar~ d'e~qpaoeur ~nbr~ le~ pla~u0s du train d~engrenage~ de p~int dl~ncr~ge et de soutient de celui-ci.
L~ partle du porte-à-~aux le plus pr~s du b~tier ~oue le m~e r~l~
que la Vi9 d'arrat du tamb~ur (20). Une r~inure longitudinal~ (31)~
p~rall~la a la tiga~ a mi--hauteur du porte~ aux~ 3ert de guid~ à
3 ~a vlJ de st~bili~ation (11) de la tlge d~ conb~Gte. Ce guide ~ert ~, 7 O a 611~in0r tout mouvement d~ rotatio~ de la tige de contact~. E~
plu~ une rainure dlintroduction de la vis de stablli3~tion de la tige de contact~ 2) permet le pa~qa~ d~ colle-cl~ moy~nn~nt u~
r~t~tl~n d~ 90 ~egr~ do la tlge~ lDr~ de l'~sssmblage.
La calibratl~n de l~indlc~teur micr~métrlque double e~t rendue po~-sible, dû ~ux f'ait que l~xe de la tige de contacto ainsl quo c~-lui du ~up~ort de 1~ instrument 90nt rig~ureu~0ment parp~ndloul~lre3 ot c3plsnaires~ ~t que le tambour ~outenant le3 deu~ couronne~ cir-oulaires gr~du6e~, peut ~tre tourn~ d~environ Bo degrê~ ~eulement;
c~est pr~ci3~ment l~rsque le t~mbour est ~ppuy~ ~ur un des ~l~nent~
qul llmitent s~n mouvement qu~ qt po~-~ible de d~te.rmin~r exaa$~-ment~ quelle l~cture sur l' in~trument ¢orresp~nd à une di~tance ex-acte (distan¢e de calibr~tion) entre l~axe du supp~rt de lll~stru~
- ment et l'extrémit~ de la t~ge de contà~toO

..~ 8 ~ . 9) NeedleO
lO) ~ cumulative cadra n needle q ~
) Vi9 de ~ tabili ~ atlon de la rod de oontacteO
12) Rod for locating the graduated eye pad 13) Support of the contact rod ~
14) Re.ssort ~
15) Retention annsau of the return 16) Clasp of the suppor ~ of the contact rod ~
17) Contact rod.
l ~) cover screw ~
19) Instrument support 20) Drum stop rod.
21) ~ maximum drum displacement angle ~
22) Patta ~ of the drum, 23 ~ Cr ~ maillereO
24) Gear rack 2 ~) Driving gear ~
26) ~ central gear O
27) ~ n ~ emble gear-re ~ sort at oheveuxO

0 28) PG ~ int de f ixaki ~ n du rel830r t à ¢ hevaux-29) Cantilever.
30) Vi8 d ~ an ¢ rage of the pGrte ~ ~ QUX ~.
31) Guid ~ of the ~ is of 9 ta ~ a tion of the tlg9 of c ~ ntact ~, 32) Landing from 1 ~ ~ ngre ~ a ~ age d ~ la er ~ m ~ illarcO
33 ~ PRlier of 1 ~ gear ~ sentral ,, 34) Acceptance of the key to rental 35) Cumulative circular dial.
36) 1l bearing assembly er ~ grensge-resaort à oheveux ~, 37) Slot groove in the plate O
38) 'rige d ~ loc ~ ation of cel ~ uvre-plaque.
39 ~ Hole for the rod dd locali ~ stlon du o ~ work-plaquaO
40) C ~ uvra-plaqueO
41) Ouv ~ rture to introduce 1 ~ vi ~ of ~ tabillsstl ~ n of the rod Conta ~ te O
42 ~ Ralnure d7 introducti ~ n de la ~ de a tabllisatlon de la ti ~ e de c ~ tact ~ par rot ~ tierl de 1 ~ tiga ls ~ r ~ de llss ~ eniblageO
I.'i ~ dio ~ tor mlorom ~ triqu ~ double includes tr ~ i ~ en ~ dl ~ tinck ~:
~ - A ~ ns ~ mbl ~ ~ olidalre compr ~ n ~ nt a t ~ mbour (3) "deu ~ c oouver ~ le3 (1), each ~ so relii ~ to the drum by four screws ~ 18) "deu ~: c ~ u-ronne3 circules ~ res graduée ~ (4) maintained ~ f'ermemsnt en oontaote ~ ur le tamibour by la3 oou ~ Tercl0s ~ deu: ~ watch glasses (8) ~, ~ t two rod ~ 9 of locatoratlon of the co ~ rm ~ irular grsdu ~ e (12) ~
This course e ~ ta ~ ambl ~ ~ an ~ lnter: e ~ renoe au bs3 ~ tier (2) "~ lr lee qu ~ 0uli ~ e ~ and can be d ~ pl ~ c ~ m ~ only (iOe., in ex ~ r-~ nt a l ~ gar ~ uple on the c ~ uY ~ rcl ~) sutour d0 Qon axea of about 8 O degree ~ 5 (21 ~ ,, 2 ~ Le ~ 3ec ~ nd ensemb: Le ~ lldaire ¢ smprend le b ~ Itier (2) inGorpora-lt le ~ upporb (19) d ~: In ~ tr ~ ent, support ~ 13) da la tig ~ da c ~ n tao ~ e ~ insi ~ u ~ the ~ srmoir (16) ~ u suppor ~ t of the rod da ¢ ontacte ~
1 ~ train of ~ ngran ~ g ~ s (24), (25 ~ ~ t ~ 27) with ~ e ~ d ~ ux plate ~ au-,;
. ~

O p ~ ri ~ ure (5) ~ t inr ~ rleure (6) o ~ portts ~ aux (29) connecting gearbox ~ ~ gear ~ t ~ upportant oelul-c ~ ~ u ¢ ntre d ~
1 ~ instrumerltO
3- Troi ~ i ~ rQe en ~ cribla ~ g3ti c ~ n ~ titu6 da la t ~ ge de ¢ ont ~ ct ~ (17) grout ~ nt 1 inté ~ eieur du ~ upport d ~ la tigo de ¢ ontact ~ ~ t du rormolr (1 ~) du ~ upport de la tigo d ~ cv ~ tacte ~ d ~ a re ~ spell (1l ~) ~ xerg ~ nt a pr ~ lon axi31e on 1 ~ contacto rod ~ a year ~ to (15) do ret ~ ntlon du re ~ rt ~ une ~ i8 de 9tabili3at ~ 0n (11) de la ~ lga of cont ~ t ~ at a rack ~ re (23) ~
LY tr ~ in d ~ anerenag ~ sa ¢ tlonné pur la Gr ~ malllere (2 ~ includes engr ~ nago de la cr ~ n ~ re (24) and 11 gear ~ leader (25) ~ olid ~ 1 req d ~ u2 ~ ~ rbre bearing ~ ohaoune of 9th ~ xtr ~ mit ~ an alguille (10) ~ umell ~ a à oadr ~ n ~ circular cumulat (351 "lo ~ deu ~ c dit ~ al-guilles ~ s ~ t un ~ dir ~ ction ~ mmuno, le dit ~ ngre ~ g0 leader ~ ction-~ e centr meshing ~ l (26 ~ whose tree ~ upporte a cha ~ a d ~ se ~
oxtrémit ~ s a needle ~ (9) ~ u ~ e 2 a heart ~ nn ~ ciroulair ~ gra-du ~ e (4), las dau ~ der ~ i ~ r ~ alguille ~ ~ y ~ nt a directi0 ~ G ~ Ua ~
~ t enrin, l'En3emblo on ~ ron ~ ge ~ r ~ ss ~ hair rt (27) ~ ngr ~ nant ~ v ~ c 17 gear ~ g ~ central ~ Le reassort a che ~ or ~, ~ voe une do 8 ~ g ~ xtr ~
~ it ~ 9 reli ~ o ~ a point fi ~ (28 ~ on the door - $ - ~ to ~ ~ 29) 0t au-be at the tree which s ~ uti ~ nt, pr ~ dult a c ~ uple which has ~ ure the c ~ n t ~ cto ccntinu ~ l between 1 ~ 9 teeth of all 1 ~ c ~ mp ~ santo ~ du tr ~ in d ~ engr ~ nage ~ and 1 ~ cr ~ maillere. Ainsl, t ~ ut m ~ uvement of the tl-ge, ~ 1 m ~ ime 30it ~ is tra ~ smi ~ fully needle ~
Ds ~ spacer-lake ~ lisatours (7) p ~ rmatt ~ nt to maintain a di! ~ Tan ~
this exa ¢ ~ ntre the plates ~ (5) and (6) as well as the ~ nlignemant ~ e9 bearing ~ of ~ shaft ~ ~ u tr ~ in of ~ rs ~ ga ~ (rer ~ fig ~ 3) o L ~ plate ~
~ up ~ 5) e ~ rieure (6) of the tr ~ (ref. f'lg.l ~ 7 ~ 1 plug do contain the ~ 3 p81ier ~ 3 (32) 7 (~ 3) at (36) ~ l ~ sd ~ ux r ~ c0ptaole ~ 3 (34 de3 esp ~ ceur-l ~ c ~ lis ~ teursD 109 tr ~ u ~ i (39) ~ or ~ ant 8 reCaVD: lr l ~ s stems da looali ~ 3atl ~ n (33) couYre-plaqu ~, c ~ nt ~ enne ~ t 19 ~ r ~ i ~, 6 '' -. ''':

Concentric grooves ~ of adjustment (~ 7) pe.nnettar ~ t a slight movement d ~ 1 ~ whole tr ~ in around 1 ~ axis ~ ntra: L of this one ola a ~ ln dl obtainlr a CQUpla ~ ep ~ r ~ Alt between the cr ~ ma ~ re ~ 23) ~ t ~ n ~ n-grenago (24). L ~ pl ~ qu ~ sup ~ ri ~ ure soul ~ mtsnb, a ~ t munl0 d 'url0 ou-verture (41) p ~ rmettsnt to insert ~ tabil screw: L ~ atlon de la ti ~
ge de contaoto (11) 11 ~ r9 de l ~ ssamblageO Ie eeuvr ~ -pl ~ qu ~ O) est r ~ du sul: Ldaire ~ es plaquea of the train of ~ ngrenago ~ by means of d ~ wc tiE e8 de locali ~ atisll (38) OL ~ oou ~ r ~ l-plaque contains 1 ~ gradua -tions of the frame ~ cumulative cumul ~ tif ~ (~ 5).
The drum (3 ~ at the re ~ e next to a ~ une ~ u cylindriqu ~ du ~ ual ~ na ooupé i mid-height and on both sides of 1 ~ axis ~ 0rtical ~ u ~ q-at a distance of about a quarter of a inch, a horizontal band high ~ ur ~ slightly ~ uppermost ~ u dia ~ atre rod ~ cont ~ tc (17) let ~ nt ain ~ i dou ~ patt ~ (22) dlam6tral ~ ment opposite ~ n turn 1 ~ drum clockwise ~ llu ~ d ~ lle ~ re ~ contr ~ le overhang (29) and dan3 the sen ~ anti ~ horalre, 1l ~ utre verr ~ 18 drum stop rod (20) llmi ~ r ~ on ma ~ uY ~ me ~ t, pr ~ v ~ n ~ ~ ln ~ l t ~ ut c ~ ntacte ~ la cr ~ ro (23) ,, L ~ rotatlon m ~ ximum du tam-b ~ 3ur e ~ t d7 ealviron 80 degrees.
Le3 limit ~ q extr ~ we ~ of the movement of 1 ~ contact rod (17) s ~ nt ~ 1-20 JC ~ 5 ~ ,, d ~ une diroctiGn, by l ~ ppul de l ~ nneau de ré ~ tenti ~ dur ~ s ~ ort ~ 15) ~ ur le re ~ ort (14) completely GOmprim ~ and danq l 'at-~ r ~ diroctionJ by the support of the same year ~ u ~ ur the support lath of the contact rod (16) ~
The ~ cantilever e ~ t ~ ix ~ au b ~ ti0r 52) p ~ r trol ~ Yi ~ (30) OS ~ party ~
oentralo ~ 18 plu9 ~ pai ~ s ~, ~ ar ~ d'e ~ qpaoeur ~ nbr ~ le ~ pla ~ u0s du gear train of p ~ int dl ~ ncr ~ ge and support thereof.
L ~ partle door-to-the most pr ~ s of the b ~ tier ~ oue le m ~ er ~ l ~
that the drummer Vi9 ~ ur (20). Longitudinal reinforcement (31) p ~ rall ~ la a la tiga ~ halfway up the door ~ aux ~ 3ert guid ~ to 3 ~ a vlJ of st ~ bili ~ ation (11) of the tlge of ~ conb ~ Gte. This guide ~ is ~, 7 O a 611 ~ in0r any movement of ~ rotatio ~ of the contact rod ~. E ~
plus ~ a groove dlintroduction of the screw of stablli3 ~ tion of the contact rod ~ 2) allows the pa ~ qa ~ d ~ glue-cl ~ moy ~ nn ~ nt u ~
r ~ t ~ tl ~ nd ~ 90 ~ egr ~ do the tlge ~ lDr ~ of ~ sssmblage.
The calibratl ~ n of the indlc ~ teur micr ~ metrlque double e ~ t rendered po ~ -sible, due ~ ux f'ait que l ~ xe de la rod de contacto ainsl quo c ~ -him ~ up ~ ort of 1 ~ 90nt rig instrument ~ ureu ~ 0ment parp ~ ndloul ~ lre3 ot c3plsnaires ~ ~ t the drum ~ outenant le3 deu ~ crown ~ cir-oulaires gr ~ du6e ~, can be rotated by ~ Bo degree ~ ~ only;
it is pr ~ ci3 ~ ment l ~ rsque t ~ mbour is ~ ppuy ~ ~ ur one of ~ l ~ nent ~
qul llmitent s ~ n movement qu ~ qt po ~ - ~ ible de d ~ te.rmin ~ r exaa $ ~ -ment ~ which l ~ cture on the in ~ trument ¢ orresp ~ nd at an ex ~ tance act (remote calibration) between the axis of the lll ~ stru ~
- ment and the end ~ of t ~ ge contà ~ toO

.. ~ 8 ~.

Claims

An exclusive right of property and privilege is claimed above following achievements:

1- In a dial indicator, which includes a shaped frame close to that of a circular cylindrical ring, incorporating halfway up and projecting outwards according to a diameter, a cylindrical element intended to adapt either to the receptacle key of a conventional support either to the shaft of a machine-or-til, a circular rod, movable along its axis, which slides only inside a hollow cylindrical truss part til, a circular rod, movable along its axis, which slides only inside a hollow part of cylindrical shape integrating with the frame and projecting outwards according to a diameter perpendicular to that of the element mentioned, these two diameter being coplanar, two indicator needles on each one of its two main faces, the first, combined with a fixed dial, indicates the cumulative displacement of the rod and the second cooperates with a graduated mobile dial the graduations of the which serve to appreciate the smallest division of the first ca-dran mentioned, a gear train connecting said rod to say needles, which consists of a rack moves erecting in concert with said rod, the latter being able to be a-imitated by an induced back-and-forth movement, at first, by the pressure exerted on its outer end by the object to measure then in a second step, by the action of a per-putting both to keep it firmly in contact with this object and bring it back to its original position in the absence of this last, the said initial position of the rod as well as its posi-tion in the opposite direction being fixed by the contact a rigid element which is integral with it with fixed points of the indicator, the said member consisting of a spring of which one end exerts a force on said rod by the through a rigid element incorporated therein while the other is based on a fixed point of the indicator, a tree, bearing a rack pinion, a gear as well as a needle at each of its ends which is paired with said fixed dial, the two hands having a common direction, a second tree, supporting at each of its ends a needle which cooperates with a so-called graduated movable dial, the two needles having a common direction. which tree incorporates pore a central pinion meshing with both said meshing-ge and a second gear, a hair spring ensuring a constant contact between all the components of said train by anchoring one of its ends to a fixed point on the indicator tor and the other to the shaft supporting the said second gear, two thin parallel plates, properly spaced and aligned, united thanks to small intercalated columns, whose ex-hoppers adjust in counter bores to be there after rigidly fixed, being covered over the whole of their fac-this external by a thin rigid plate, which carries the graduations of said fixed dial, is located mechanically and held in place by the proximity of said movable dial, and containing the pivots of the trees as well as grooves adjustment triques thus forming an integral unit the which around its central axis, allows to obtain an ac-perfect coupling between the teeth of the rack and those of its pinion, a member, rigidly anchored on the inner wall had said frame, acting cantilever, serving both to space, support and anchor this last united whole, with a groove, cut halfway up and parallel said rod, used to guide the end of a rigid element of solidarity of the said rack thus preventing any rotation of the latter, threaded holes where the screws are fixed anchoring said plates as well as those of said member, an insertion groove for said last rigid element during of the assembly as well as a thinning, in its adjas-centered on the said frame, a component, with a shape close to that of a circular cylindrical ring from which have been cut in half height and on either side of the vertical axis, two sections horizontal sectoral, leave two legs diametrically opposite, which is assembled with two so-called mobile dials identical graduates, one on each of its upper and lower sides lower, so that the graduations on both sides drans correspond, this correspondence being ensured by an e-locator element used to prevent any rotation of said ca-mobile dran graduated with respect to said component, as well as to two thin washers, each of them supports a watch glass, firmly supports a so-called graduated mobile dial against the face of said component and incorporates at its base, side of its largest diameter, a protrusion of cross-section tangular which adjusts without interference to a shoulder correspondent formed on said frame of the instrument, forming thus an integral assembly which can be rotated or adjusted manually inside a limited area by sliding on the said built since if the said united set is rotated clockwise, one of the legs of said component spins out ridge on the side of the thinned part of said door member false while in the opposite direction the other leg stops on a rigid element anchored on the inner wall of said frame, the combination of said cantilever member and said compound health, which combination gives the said indicator the been that any reading or adjustment made on one of its two main faces is automatically and preci-mentally reproduced on the opposite side.

2- A micrometric indicator as in claim (1) used to determine the precise distance between an axis and a sur-face, thanks to the cooperation of two geometric characteristics one being perpendicularity and the other being coplanarity on the one hand from the axis of the element serving to support said guide and on the other hand the orientation of the displacement of the member coming into contact with the surface to be measured and a mechanical characteristic residing in the fact that movement, of said solidarity assembly manually adjustable in rotation in sliding on the frame of said indicator and which assembly comprises takes the said component with a shape close to that of a ring cylindrical circular from which have been cut off, halfway up and on either side of the vertical axis, two sectoral tranches they are horizontal, leaving two diametrically opposite legs, two so-called identical mobile dials, two so-called flat washers ble thickness comprising at their base, on the side of their largest diameter, a protrusion of rectangular section which just without interference to a corresponding shoulder formed on the said frame of the instrument, two watch glasses as well as assembly elements, is limited by rigid supports dull; thus, a precise and more repeatable reading corresponds to hangs at the stop position of said integral assembly on a said support given, the distance from the end of said member coming normally in contact with the surface to be measured at the central axis tral of said element being determined beforehand, the distance between this last axis and a surface with which the ex-end of said member is currently in contact, is obtained by subtracting from the said predetermined distance the distance from which said member moved this last match corresponding to the total displacement of the indicator hands.

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