and4"@bDi,l'ectedan''tl'ins"Lii,ing,r'igidity. The 61 e 'secti " d6 .."I ln ,Pro-vent'tiiihiiig o.f n on f'el',tfive@ to@'th'e'oth6'r's iv'Lli@@b-o noted@ thf'@t ih-e end po'rti6iis,-'df n o the @e6tib @s- o f,,tnd 4@ o . th@e, inst' rtiment 'ha'iTe@ ol?eiiiiio,s 316- tllff 6lid' ha@vi@ -re6e;s@ses 36 'ivhic'h-@reCe,,ve@ the 6i@d-s @of@'tho bo-its @6, itil@t@is, -@@h6n-ili4y aie tD frbi)@%'th6'@d6@ss@s @5-,i-nd E,,@e iiio-ved. ,ts e.@-- t6ii(Iiii6-- loia,@it-Liaiiiall@'(jf ih-e opeiiings- 3,o-. 1,VHeii- the@'bolts ,i@e @ ,6 dis-p''o @se@l th6 @thliiiib ifut@s 34- ir'e i@ev6is,6d 'until- th@y en;g,,tg6: tho 6i@(I ivlltl!9 the yore aiiiih (t the bolts- a@y,,tinst disp-laceii@eht ,lv ic ng rattling 'th6reof. F-Lii-the@in6ie IN'l@e@ii tl@e bolts a@e g6 disp6sed,'tlie '@6ve@al 2, 3 dn(1'4 m'ay'be ti,r'ang6@l@@aia!161 ap-d ed6l-l Ith " o er in ,t small compass . 5 iii a b6x' PeT@'niiftiii(y theii-i tb be ai@p6s6d or 2'0 other ei)nta:tn'er use or duiiii@ t@"qn@@l@ortatioii. Tlie@termiii,,Lls O'f the-'bolts I - @ 'tiallsver e pi 26 l@dve ils 3which p@e@,ent. thO Llitimb'niits from eiitiiely dise-n@-,igiiig- ft6'm tilo, l@ofts,, ther@b@ avoidiii(-y lo,,@s thetoof. n B @ieli of @ tlle@ @ectio s 3 and '4, ha '6iteLi@l,,ir s ol@6iiiiigs 1,9 a'nd''gq@: @f6i@ tl-ie te-,616tioh of @pirit I @'; ol h'oldo '40',@ii(l- 41. 'e eV r8, @Th holdbrs 40,'a'ncl 4@l I'@Lre of-'ring . fox-y'n aiicl h',,iv'e r'acli'al 49'th-r6ui)-li OPPO'@. Si op6nili@'s 4.6 q"re f o r-m' e'd. . t6 el ;. Ti'!6,5e opeiiings,receive splrir,,I-evol@s 44 'ali@l 45, tli6 ior-m'eiboin&'ii-.-ed;,fo@ li@veliiio--l@6ri7 zoiital s@iir'fice's i-@hile: the is 'u' . sec foi i ai'd iii6 i@, cli@i)6sing iiptights, sttidg 1, e- p-eT@35 peiiclidtii@i@ly. @silit,,t@l'e @et-s6@ows 46'',ilid 47 -,ire threacled thro@igh the lj(5'dl'es o@f@'tiie se. cticii-is@ 9@' aiid 4@ a@lid@ e'ii("@o,6 NVitli'th6 i@@dial webs 19- for the purpose of retaining @@lie spirit lei,,el bold@i-s iii position. Obviously, 'i'rit le 40 the p;6sitio@@ns of tl@e sT,) -@el holders may be chaiiged. Iii other words, the holder cai-ryiiig the level 44 may be disposed to position the level 44 for disposing studs and uprights pei-peiidici.,.Iarly ivhile the other 45 holder iiiay be changed sd that the spirit; le-,7el 45 mty be used for leveling horizontal surf aces. The remote ends of the section 3 and 4 of the inclinometei- aiid level h,,tve openings 48 5( and disposed therein -Lre plumb bobs 49. The opposite ends of the openings 48 have sockets 50 and 51, the, foi,mer I receiving plumb bob retainers 52 while the latter receive dowel members 53, there being set5 i-) screivs 54 thre,,tded in the remote ends of the sectioiis @) ai-id 4 f or bearing against the dowel members for the plirpose Of retaining the plumb bobs in position. The retainers ,2 have depressions 55, in their he,@Lds for the reclueed ends of the pliimb bobs -which have transver.se open@ings 56 and axial pas@ages or opei-iiiigs 57 merging iilto the openings 56.. Wires or cords 58 pass throligh the openin-s or- passages 57 and ,Lre knotted, as shown, , the knots being located in the op6ii@in,@s- 56.- Tha,c:otds- p,,fss thpodgh- th-o sh @ ks:; ihe lr6faiii6k ' an, o'f their oppolsit'e, '6iids',a@@'sh6Wn. th set'se'r'e-ws a'nd ereb y lb6 @'6niii6;@the,do"k"Vel@''M 0 70 embers'b6l w@ th;@ stb6kof the 'secti'ons 3@:'and--4 6'thit tlie-IjoiRt6d e@Acls'' af Llie @Iiiiiib - bob ar'e f re'e to" @M@ 01 V;'e the, plitmb. bdbs' lillty be e @m' '1' fo p oyed r @Iiiffib,' in 'obj'ec't5 clil@oiiie 6r iiid 'lovel @is dis'po-se,d' in a P'6idi'c'til,,tr ''p'ositioii. The invpntion'l@@,V,Ing'bee,ii @et'f6i,th i@h'@t ia cial: 'm6d 'i's @l. @in :aii-;ii@eliil6 m6',-er @iiid ,Ln 111- s rtimeiit, b t ' a-penddliiih 0 ody h,,ivili'& a eavi Y, th @lial lnoL[il, f6 erein @ anc prdITi d6d. in de ii es ereof', 17 an iiidi&dtcr -@yith d atib'n' i' u , 8@ n c eoi@ec@s coo@ @e@@ie . l@@" ir.g'6*eld d iiie@,,t iis:,incl'ucl' ia,te tibnl I eii7iiik@@ f6r mo@ihtino- d i ti e-'c,,tvhi - ' " tn it@y iid pl@lte -@ n - iiidi ator 'o'p"o"n'@ s, tt pi i o f' ii c n d @ a d)' a -c e"n'6 'g'iacIV ati6l@s- ln"posi folis to tli6 @in'dic, to-i- f ht iiioles ci or meltsIq t i u 'a, s riii e I-L t It 't of t,,Li@"rd, . '2. . In @a'n i@nel-i@o"@@fer@ "'(I- I'@v6-f a; '@64' I m "I n. p@bvidea -with a c,,t v il -@'y; 1,;, a c i,,@l" 16c'ated, ili si'f(t 6@ivif. r ffi6e @6c]i@i'n @ I i , .. li y fo o@'inove-.,nen s ovi Nvlt'li 'g'r'ad'u'ationg in de--'ree's-'@-n,cl p@ ml-nll fi@er6of, an iiidi6@@:io'r ' -v@ri@ tlie@,o't'ad-Liq'tib'ils c';o'op''er4ate f-'or @m'ea:sii@i@',,, ',4i, ii-iclina?-ion, ,, pendulun-i -",eigl-at iii8i@ldf@'o, -me'ltns'-f'or 4cliti@tiii6@'tlie 'Weib-ht ve to@the didi@t,o ii-istire, thaf tlie, 4@a(iii 100 t" ns,a6cui@at61y @r@egi'-@l,6r'@viit tl@ 'i (li',,tfot 't 'O e n c wh'e" n a@lovel f sur ace, mean@s in'6 beaiiii @-s Iiidiiig a lt e a,n jewe @y? s'a i d, p' a' e a-nd"a Idj"ace'n'.t' 11 . 105 t@ ,in'',-le's t-o no; tlle tilt of a standard. 3. In an inclinon-ieter aild level, ai-i instru. ment body having a cavity, ,t pendtiluin di@ql 110 n-lounted tlierein and provided with (yradu,,t-@ tn +@ions in de,,-rees aiid mii-itites thereof, an 111- die-,ttor with which the gradLiatioDs in deoi-ees cooperate for measuring an inclinzlFion, means iiieluding t plate and jeweled beai-ings for motinting the ditl ill '@he, cav- 1"5 ity, said plate having ,in indicator opening, ,tnd adjacent gradliations in positions at right an(rles to the iiidicator for ine,,Lsuring ti-ie tilt @f t sta'ndard, the body of the in- 2 strui,.ient upoii opposite portions there havin(y tables giviiig the measurements of inclintati ons according to the angle thereof. 4. In an inclinometer and level, a body provided with ct c-,ivi'u-y, a dial located in s,,tid 125 cavity for free rocking rhovements and provided with grad-Liations iii degrees and ininutes thereof, an indicator with which the graduati ons cooperate for measurina an inclination, a pendulum 'Wei-aht for 'the di,.tl including meajis for adu@ting the weight 130 r6lative to the dial to iiasure that tlie o,r,ad. uations aceLirately register with i@e ':@indi. c-,Ltor Nvhen measuriiig a level surface rneaiis including ,t plate and je-",eled beariiigs for mouiiting the dial in @i-ie cavity, said plate having -,iii indicator opening, ,tnd adjaceiit grad-Liatioiis in posi4Lions at right aiigles to tl-ie indic,,ttor for n-ieasliriii- the tilt of a zn standard, the bocly of the instrliiiient upoii 10 opposite portions thereof having tables giving the meastirements of inclinatioi3s aecordii,ig to the aiigle tliereof. 5. In an inclliiometer ,tiad level, the combin,,ttion with ,in instrument body providecl 15 witli a circular depression, of a dial provided wi I th graduations in degrees and mitiutes thereof in said depression, ,L penduluin member on the dial, a web pl,,ite inel-Lidiiig jeweled bearings for mountiiig the diltl, one 20 bearing beiiig c,,trried by the bottoni of the depression 7 the other carried by the web plate, aii indicator c,,trried by the web pl,,tte witli which the gr,,tcluations of tl-ie dial cooperate for iiieasurliig the ,tngle of an 25 inclination, said web pl,,tte I-i,,tvino; -Ln indic,itor -ning at a location at right ,tiigles Opp to the indicfttor with (,YradLi,,Ltions iihereby tl-ie body M,,ty be disposed perpeiidicularl3T for me,,tsuring the tilt of an upright, ,t ulass 30 ring the web plate, and means for recove taining the glass, web pl,,tte and di,,il in s@aid depression. 6. In an inclinometer and level, the combination with an instrumen.t bodylprovide('l 35 witl-i a eircul,,tr depression, of a dial provided witli gradliation iii clegrees ,ind miliutes thereof in s,,tid depressloii, ,t pendululii meiiiber on the dial, a web pl,,ite in,, - 1-Lidino]ewl@led beariiigs for mountiii@, the dial, one, 110 be,,tring being,carried by the bottom of the 1,552,141 depression, the ot-lier carried by the web plate, an indicator carried by the iveb plate witl-i which the gr,,idu,,ttiolis of the dial cooperate for n-ieastiriiio, the aiigl@ of an inclin,,ttion saicl web -1,,tte having an indi- 46 cator opening at a loettioii ,It rigl-it ,ingles to the indicator -with gradu,,ttions wliereby the bod a be disposed per@endictilary n, y ly for measuriilg the tilt of ,,tn iipriglit, a glass ColTeriiig the web plate, and me,,tns for 50 retaiiiiiig tl@e gl,,tss, web plate and dial in said depression, the body of the instrurnep@t upo-n opposite portioiis tl-iereof having tables giviiig the iileasurements in inches according to tl-ie ILngle tl-iereof. @ 1 55 7. In an inclinoineter and level, ,tn instruinent; body composed of complemental intern-iedi,,tte ,ilid end sections ,trranged end to end in alignment, means for separably couplii-ig tl-ie adjacent ends of tl-ie sections 60 ivliereby, upoil cli--coniiecting the ends, -the sections may be disposed parallel and adj,,tcent each @other in a sm,,tll compass, stid coupliiig meaps compi-ising pivots, the adjacent ends of tl-ie sections having recess6s, 65 b6lts etigaging s,,tid recesses and provided with eyes at cert,,Lii-i of their ends and through which the pivots pass, thumb n7Lits on tl-ie bolts for ret-,tining tl-ie sections coupled meaiis for I)reventiiig twisting, ,tetion 70 of one section relative to the oth(,r, and ineaiis for retaining the bolts in collapsed positions within the elicl sections and preventing them froin rattliiig when the seetions are ,irr,-Lnged ,idjacent and p,-Lrallel 75 -",ith each other. In testimony whereof he ,tffixes his signature. EDMUND F. GOBATTI.
Patented Se t. 1 192 , 1 552@141-@ p UNIT'ED@ ST@A@'T@", PATE@'NT OFFtt, INCLIXOM-ETFIRI A ND, 3@EVEL, App,@icatiQn file.4 3i y 29, i' T@,. all'whom it' mciy C.07@de?@,n: holding the, sections in alignment. + e @ . S , 6 c tl o ' @ ' b e . @ @ . p B@e it lo-io-wn th,,it EDTvi:u'ND F. G'P'l@ATTI ft' p@riniitl'n@@ h -hs@, to citize'n of tile@-ttnited States-. of A@'@m@eri:ca w @e@6b@ @the@. mAy- be- axr@i@gp.a--inpar i-esidiiio- at Pueblo, in., the 66@iiily Of i@iism- and adj'a'@"@p@ . each th'@ o er in', a, 5 an(I St@ite of' Col'cira(-:Io l@'as ihii@nte'd' @'6@v, li@ com'pass; -w'h"e'r'e,13'y'- th'.- e , i ' n s t @ r i i n f e i i t s ippe and Liseftil Iinproyements in Incli m@ie@@ m4y. h" d in - , a,, j7 i n s t r u ' e n t 6 1 and, Leve@ls,. of whi'ch tli f 61 1 o wi'n@ 0,@ is,, w' WY@- or An m Ijpcification. tkis. b@ US(@d b - elii'n 1 $60 y ma The,'present ihve'ntioiilias t-6@ itsp.LLr@osa @ geii-' en gineers or, y: @ ose 'b' VI 10 to provid6 iii an, inciinon-ietler I ind lb "6@- y@ ei b f,@ ,ye'; a ei@a T @ ' d ing, rac i:g@ constrii6tion incitidihg li@eiiis. f6i-, iiibas'u"r'--; I @a"y"' 't@ -@ail"d':r'ppairiilz. roa, s. be @underst66,d @h i' ing inclines, in deeri-eegand@ mi'nlites' a'n'@l@'al@6 at@ tie p@trtictil@tr t@d'. o erelty ven ar,,@ i@i )@cf 7@,, y inea,ns @or brick or 6ther ma4onry anci '@e9,,ms, stiid'- th@t,,,wh@i@ 7 i4g, t" liio 15 di and: the Iike.' the' iiiven loii-@ ci-nv (iesireci of a pr op. orti on s miiy, ma Anotlier purpose.is to p@o-@ido an@ instru; deta11, ' Tid d'esirect b,@ d@ rnent of thi , ch@raeter prb@ided, with, in tb@o; 'i@66idinir. to- t 6ficum@ .Lor mounting an ii-iclihdti@n @Aea@ti@i@g c!4- s@@iade's., @o vice in tlae bod o@ the-.instrumen.t' @@ld a@- Th@ i'lli,@aiifi6n c6iii@;rike,@-fh@thet'f6atu@6s y 20 vice compris@iig, a-:weig-hied'di.@l @6f- @@,Tt's. t6- b@'e her@inaft(@@ d6gr.ees and@ ininiit6@. subdivisio'n' s,, sc@@ sei. f 6@th; @@'O,wn, i,nl d'r'a.'wlng anc iii@the body of the,ilastrument. t@at i@l-len the ti.z I instr-Llment is enrao-ed with, a sutfitee e:iiie I y n th level, the, eii)@e-r'aV,tlie top of, tlid dfal'-ivil@@ iii @le@v''a'ti@o'n o@" t'h'e- ',mFiktire 1is. a 2 5 l@egister with an ih@licator- C',Il@l-i6d b@ ihe v6d' i@iielinoiiiet@i@ a@4-le@ei', ruet-ed iii pro bod of t-l-ie iinstrument -,ind in c@tse thQ @sur.- 6,'ccordAnce *itlic il@e iii@6@iion@. y f ce on@ ivhich@ the- iiistrunient.6ngages. isiii-- 's, a ed @,iew, 'of a F igure, 2.-, 1- 9f cli-ned in eithor directioii the graduatio@@- t'h@- aine. 8 on: the dial will. cooperate- -with th6. lhdi'cat@Dr, igur.e 3@ is@- a,,' Vlew,- ID_ el6@- ati6n 6-f the I't i@ 'b 30 gi-ving. the, de,-ree of aiio-@le 66t'i6iD., @q- 6E i@@- i@Qii@a6in@ . . I Q, Y!Pljg interiiiediite t6r. tli,qt the instr.Lim'ent' may be Lised fbr- is, @gh .6@e. .:n ig-ure is-,.a, secliona, .,view. r@o- . cort,ainino,, the- incliiaation of.@ a stud', @el6,- o@-'th@. @ndt s@ectibi@s, 6t'il@,a in;cliiibm@f er@:oiitii,e to a. perpendic-Lila@, by. digposiiig the in, 'line - strtiw@ei-it adjacent to the St_ud whi'li 5- s,.- a,. s@6ti6nal Vie-w oii @linp,. in Q case 3r) the clial will cooperate. -with, a@Lother iii-, f' o Figuib,-I.-, dicator. cirried by a,@.@lhte on whi@ht tli6 X@a,]' Fi@-rure W. 6' e oii..@ liii6,@ 6'- is! part-ly, support@d-. St-ill, anotlier purpose. is to @ provid Flgu@-,w- @a,,- go e an, insectioiaa ..viow pi!- @lifle, 7-7 clinometer- and level- ineludiiig a,. body. P.r6@ 40 vided with, means fo p @o Figiiri',,,-S- "s'@@ii rp r Su p r,tin-& - bw@o I of tb6L ii@-ter edilevels,. one.@ f6r leveling.. hori@o-jal stirac@s. and - t@e , other, to, plum!) tn, obi @et.- ])@rF ' l k a i , - a @ - - s @ e i , i 6 i i a . 1 1 7 ' 1 , e @ @ W 9 clictilair.ly to..@.-hoiizo'nta-1, rifteei.il@ere@b ihr,6u4j@ th@7pi@.ts-. Sii e@ng,, c me,ans. for, i-et@i@in , the. s@i@iit 16v@I'li6liiiiig on t'i@4 l@ hol' ez@- 4L 45 in,the bod@, of ring-@s i ereSpIrl'.@ e, by i-he-rinors,m@y be@'di@pos .- ifrer.ent. p eff in,d F@.igu-rgis @-a V16@ gn. 0 f siiions. f liher- of,. th@ spi@it', le@:vel's @m @a@y. *.6@, 12-l' @-@ : 100 -Lised', for@ leveeiig,: horizontal,-,surfAces- . r4@lg'ure,,- 127 i& a-,&t-alli -e-v@', 61-, ose!-i@ the 31 a -li]7.P i)ovision..of-aii. igure 1 VI]-e-W ip7 e@OV440 A f,urthert 00 inciin6mete.r aiici 16vel compr-,i@in -,a bod-@..,ln7,. the, ctial 6., -y, cluding@a,;p,iur@lit of-s@peti0iis di -W IA is an h at@e d, tw6 exyd so@t,@ons wi m AA 9@, 0 115522141 showino, a, plate secured by screws thereto, @re @' the th(@ eing one on eacli side thereof@ pla,te havin(, engraved thereon the rise per foot for each degree, from one to twentyf our clegrees. Figure 15 is a vie@v in elaitation of a, portion of one side of the section 3 of the inclinometer with a plate simill'ir to tl-iat shown in Figtire, 14, there beiiig one of Is,,,iicl 10 plates on eael-i side of the section, the plate beinly provided with the rise per f oot for eacl@-degroe, from t-,wenty-five to forty-fi,@e degrees. Referring to the dra-wings@ I designates 15 the inclinometer and level as t whole, the same comprislnogthe intermediaie sectioii 2 and the two end se@@tions 3 and 4, the foriner being to tlle left of the sectioii 2 aiid thB latter to the right of thB intermediate section. 20 The several sections may be consiructed of any suitable materia-1, preferably aluminum, e - ,tnd Lre of web construction and tli inter mediate section in its web is provided with a depressed seat or cavity 5 for the recep25 tion of I the dial .6 wliich is pro@,ided with graduations 7 in degrees @ind minutes. The dial 6 has a weight 8 sec,Lired thereto by means 6fset-screws 9 whiel-i enga,@,e, '5 through slots 10 of the, weight and are 30 threaded into the ditl 6. This wei-h@ extends -,Lcross the center of the dial @Iiieh is -Li tec -ied teel mo n I on a relatively hard p6lisl s shaft 11 -which passes throiigh the dial ,tnd we,ight. In f act, tl-ie shaft is mounted, upon 35 jeweled bearings, the, larzer elld of tlie weight dependinz below trie sha-Lt so that, when a surf ace i@ exactly level, the cipher a,t the top of the dial will register 'With art indic,.ttor. The je-,weled bearings Pei-init tile 40, dial to freely balance in tl-ie dep@e@sed seat or cavity. The purpose, of providin@- the slots 10 is to permit the weiglft to be properly adjusted with relation to the dial so 45 tl-iat the dial will properly register with tl-ie indicator wheii a surface is exactly level. One of the jeweled bea@ino-s oi tlle shaft is carried by the bottom 'of the depressed seat or cavity while the other, be,,tring is cai@ried by the center of a, web plate 12 50 which i-s moiint.ed in the depressed seat 6r cavity. The cylindrical wall @ of the depressed seat or, cavity at diametri6ally op,ite points has recesses 13 Po,,, fot t.he recep55 tion or ribs or projections 14 at diametrically opposite positions.on the web plate, 12 which has diametrically opposite enlarked openings 15. The interior of -the ''cylindrical wall of the )veb pla'te has radi,@tl proje6- tions 16 -which are coniiected by ,t relatively 60 fine wire indicator 17 wit,h whi.ch the. zradiie for meas7Liring The web plate 12 at a Dosition at I-igl-lt angles to the,w,ire inaicatoi@is provided with a segmental oponing 18,- tl-iere being adjaations on the di the aiigle of an cent graduations 19 iii degrees so that, Nvl-leii the inclinometer is used in a perpendielilar position for measuring the tilt of an upright, stud or silnilar objeet, the, deg@cee grad-LLations on the dial will cooperate, witl-i 70 those on the, web pla'te. The web plate is alsoi inolinted iii the depressed seat or cavity on a slioulder 20 intepinediate the, bottom of the depressed seat or cavity aiid the counterbored portion of the cavity' A glass 75 21 of eirellilar form rests upon the web plate, ,Lnd the dial, too,-ether witl-i the iveb -Dlate and the gllss, are ret,,tined in the de@ressed seat or cavity by niealqs of a ret-,Lining ring 22 -which is threaded iiito the coun- 80 terbored portion of the sea:t or cavity and is knurlecl, as shown at 23, to permit the riiig to be easily screwed 1-iome ,tnd olit of eng-,geme.nt with t@e wall of the se,,Lt. The opposite, end p6rtions of the - seetion 85 2 of the inclinometer on the, web portion thereof is provided witli tables of figures showiiig the rise in 12 inclies per S-iilgle degree -LLp to@ 12 de-urees and in degrees and minutes per even - inches fronl 3 inches up 90 to 12 inches or 45 deo_,ree@. In using the in@trument ivl-ien measiliping an inclinatioii which causes the, dial to register 1 degree, ihe rise of the angle is 1.3/64 of an inch per foot ,tnd if the inclination covers 2 degrees, 95 the rise of the a,-ngle will be 27/64 of an inch per foot nd if thp- iiielin a ation covers 18 deo-rees aiid 26 mip-iites the rise of tli6 Z7, angle will be 4 inches to the foot a-iid if the.di,,il registers 45 degree,s, the rise of the 100 arto-le, will be 12 inches to the foot. All of these tables aiid others will be found upon the web portion of the section 2 of '.lie instrumeiit, or -Lipon plates 60 secured se - 105 by serews 61 upon opposite sides of the c tions 3 aiid 4. The opposite encis of the section 2 of tl-ie instriiiuent are provided witli clepressioiis 24, there be,,ng 1,,tteral recesses 25 for the reception of the shanks of the bolts 110 26. The bolts liai,e eyes 27 which are @inotally mounted upon piv6t sh,,tfts 28, certain eiids of which are threided, at 29 iiito c i av - ties of the adjacent ends of the secti6ns 3 and 4 of tl-ie instrument. I The pivot shafts 115 exteiid traiisversely of certain of the recesses 25 formed in tlie @nds of the sections 3 ,incl 4. The adi,-Leent ends of the sections 3 and 4 have, arcu'ate depressions. 31 similar to the d6pressio - ns 24 and adjacent the depressions 24 and 31, the adjacent end of the sections 2, 3 -tii'd 14 are pr6vided -with cavities 32 for the reception of dowel pins 33 which @ liolcl the sections 2, 3 and 4 in ,tligiiinent. ThLimb n-Lits 34 are threaded upon the bolts 26 aild beir upon the end,edges of the 'walls of the recesses 2i5, that is wheii the bolts 26 ,ire, engaged with' the recesses 25 and extelid trinsvers I ely of th6 -,trcuate depressibns 24 ,ti I id 317 tliereby retaining the sect Iions 2, 3 130