1 468,945 e 65 -not 1;,lii-teci th re4L,-, for stich units as sh6wn frani e onsistin& of inner and outer units ;la tiie drt-@-,7,iiggs --,iiai, be eirp'Loyed for btse -Tor facin(,- @Lhe tD T@,all at P.11 sioes oj' said I-e-,- ope niilg, -id s,,@ch other arclii4 te 11 'oo,,,rds, ils a, -jamb and lin' 1 u,-iits betwee the tur,,.l OLe 4- _IIIS is ,n -Fqci-Tic, units all the tiliits bei-iig precast, -ty be conveniently 1-ia-Tlii,3 ;-actured. ii-,eaiis to co@-hi,,3ct t'r@e :idjacent Linits, n,.et,,tl Mic C-.et2,,-Ills of the sevei,,-l units i,,-iay -, -i ae n I un' @70 11 plates q@tt - hod to the iatnb ,tnd li te its be c'iiiin,ed by 'Lhose skilled in the ar,'@- "-vith- o-i-iiOLe plates @-or- sash-s ottached to froila S-.@)irit 0-,L inveqthe P.-letal pl,,i'ues, said Aiall being forn, ed Nv'l@th ',---ion as se'l- fortli in the clai@-.- .s. ch,,,mbers fc)r sash -;cio@hts bet-@,11-e,,,@l@ @- ,.be s:ide 10 I c'i a,'@ m f,,Icinc, iiiiits -L b-ack o' the jaiib -Lini' aii -L LS A -L'ra-me i-r;- a ivau salici tiie ol@iide plates aiid stil:)port4 i,),2 aii op,@@niii, 7 - n,. plates b6,i-,I-g 75 fra,-..-!e cop-sisting of i-rner, a,.,-d olitcr f-aci,-i-@,7i@Lh rece-,@so.- I-or sasli-co,.d p-Lillei-,s tre@L arrin -@'L at t',,,e top of t-'Lie ol g, u P. and s,-,sh pulleys i -ii- v(,rt@c,)l ai-d hor;@zo,-ital roavs, jimb f-@ cl mou-@-ited iAl q,,ticl recesses. 15 ii-i el -LiT-li'@'s -'Llic faclng ulnits ai-icl i'lso A '@r,-,me --@er "in opening iii a N@,,Lll, said ,ii-rar -i vertic-I a.-id hor'@zontal ro7s, nlr 80 --ed iT COI@ISISL',')O' 01 !-'Iller aid outer fgc,' all sq@iet u-Thts bei-,ig 1D--,-ocast riicl -,,@'orm,-cl Avit'ti U-nits aclilicent saicl ope,-.i--,ig @and i-Ti -- ,(Yis,erilio, (Yrc.OTes, an,,', co--,,i,--P-cto:os - P:,,ourtect ve " ri., - zn 1-@ rt.cal P,,-id hori-zoi-ital ro-ws, jan-ib and lint-11 i--q S'li,-l gi-ooves to u,,iit-, 'Llie Lini'Ls In@.o fi-a-- -iies, uT-l@"cs betv,,,een the facino, u-pits ---qd a!-so t@ 20 2. A for ,i-ii ope_qi-nf, i-ri ivall, slid @,ri aTiged i-@-i and h6rizo-.ital --,Ws all o-i f-Lrd ou,----r iqcin! ui- ew ih ,ime co-713-istir,- stid -Linits bei@-,(y pree s- c,--,id -loi,iii cl i' 85 rino@ rooves, conr-,ec@Fors in ui-iits adiqcei-il, sa'@-L ope-,a-in,,y --iid cirr@,n-ge-i re(yiste 9 i,-i ver,@-Ical ii6riz6@,ifp.1 ro-w,;z, iai-i,b ,t,-id saiOi grooves to urite the u-.qits i--tif-0 linl-el un-'@ts b-Itwc,,e,.i t'@ill@ aiid tt cenerete fij-lin" b-,tiieen thc. fqcing@ 25 also ai,raii,@@ecL iii -;ertica'@- '- ,Iorizort,,ii units It-,he -Linits have beei ere,-,ted. iCL urits be-i.Tig -'@o -lie ro,,@,s, al@l s,.i r,@ -,I S. Al -Lorame io.- op(@niiicy in ,t @.@,,all, 90 ,,iid S"Iie in,3 c onsist,,-.,i '@ac' fra its I@l9 , o f - L I T I ( Y U n 1 4 - to ,ii,@ite tlie llnifs i,- Lcent, s-)-d open@.n,.)@, ja@-,ab iiii@ s 'b6t-@-,c--.i thG, ii,to ac,jq ce--iit,. iac-,Iig iini-'U-g of the @-er'Liqits, saic', upits bei-n,- Drecf,.St ard th-, oi)en- regisleri--ti-l- lui-ooves ti,,d cori-iectors I-a(.,s iii the sarii,- i)lane and @'I 0 01)])OS-@L i C" s'Llo ii,.a the iiii-lb tind fteino. units. 95 io@- En opoi -a; 9 fra. i in o,- j r. a iy, a 1 3. A fr,,.riie for an opepiii,- i-@i a cl ir,@riI O' U ceS @'t I , 6 co-Tisisting of iii's rclid lit u - 01' said o-,,)eni-og ,,.ncl jimb ,ilDi'@s bet-v.7e,-.-I tl,-ie O-L cl o ter -,,,.nit-, zn a',l slcl,,@s0P, S,Liq units, s,,@.i-d i,,@-ii's belri-- pre@--,,,st i,-Id -.-Ig, 4 -,iib aicl li@-itel t,.,,@its o-isteri _.i, h aviii,@l; re.; ng groove COj@nl2ctors to. 100 4! 0 ,a-14,p.g iii-ii[s 'Lb--, ii,,-iits beino@ p,-ec,,ist u-ii'L-le tl,,@e Lll'-its, q_nd rl'os I -i3 aclj, -i u -Li'-.- ,its, o-i the jamb iinits. to C,-)l li-2ct tL -.cei to .-he -j'vrib aid iiiitello, frame for a--i opr-,iii--.i,,- -q "I i,.,all, 4@IJ u,,iiits. s:, - @l 'Lrime con@istino- of units 4. A in a sfl,@,d jtcent@ saic', openitg qnd jfm'i) @.iiii@,s bet-\,7(,eii 105 o, outer - Luiits 4-Ine, ullits, q -@id -cii@@lls bei-jig and -@ll si-,-t-,s o-f2 tti. tdjpceiit clove'a'! L,@r o-- es Pn-I coniiee'L,b r,- SE'licl o,,Deniii@, Lillits -@- avin(Y dovetpii- ejle,,s the 45 iiiii thc@, ii-@iits beirig pi,eoperii- @i w,,Il frarae tor ,,P g In -@ol -.- Lect nt St! -L @-o @i- the adilILee iiilits, comorisi-.io7Liiiits cop.,,@titiiti@-i(r aTi e@iC[ r',ice 110 '-o !lie ia@-iib a-,i@,l 1--, of tl'ie ,t@acl ii-n;ts on ea-h sic,e L i-)i@@tes i,Ioiv c-T stie'Ll l u qa,,Ii(3 ur)-its. il- o -t' such u-,g"-s recast, ,i ii d b-,i-in-- r@ie@-al piatc-s. bein.0 ;P 50 5. A --ri-)r i7-i ti -\v@Lil, Sfti',! )'I'Ooves, Ind "-.,i tlie, (,-roo-i7eS ICo f,., --q ('@ @etiter TIT 115 co-cs7s' @,nite ".he iii-ii-ts. -@'Or the -I4, siclos ol' so.;,@i -9 A frtmoo a 11 opeT-11"y irl @-C. 1)7all ri OT'loniTi@r, jp,-@lb u its - i i t s a n - P c l s u r - @ iirits L'il tl),,-, f,@i cefthe ii,rl ii@-iits on e-ach 0 si de 0 @i' sticl-i o'L s Licli 55 iiiear,--s C) c, T'If! @eS fl@t@-ae' to t'iie ia3,,,bac',, 'i-ilits, U-lq 1-ts bein- Drecast r,,Pcl i,ecriStc,.@,-iT u flocit 120 Li S u C grooves. icle pl,-@1--s s,,sli-o at'@t -'iied cop.,.iectors ;n the gi@oo-.,es@ to ,,inite to the i)l@-ttes @it, -f-,ch s-"Cle 0-@ @ c +he 'Linits, said -L,tcipff liniis 1- i,,;@,v-'L-Tl 11, a@ CL; - u -ial vertical -7ioi7eta;'l :IleLo--@- orc- o' :'clie u; ct ei,)Iiies @io@ cioveraji- grooves re(yist-,.-Ill. 9 r @ii f, 0 p o,,; i t, i o i--i e -I aL-; the 0--c wii-h each @ot'.ie-.. an.O,, co-Tirecting plate S C Y , - ' d lieigfit a,,iel Pt e;@ch sid,,@ )f ,-.he In, cl, @ceticliiio, icr6ss bet-,Ye--i-i s@,.i Taciny tin-Lts ,t d125 above @nd be!-o-,7 having t@,eir eii,- Is do@,eta@lle d dovet,@il g,.ooves. 6. A -Tor an openilig iil -will said RA-LPH. Z. HOPKINS its acli,-icer-t @@-icl t,@c@,ii rows havit,.cy the c-iie.,s zn other guic@,e said n-ii,-Idle pl,,lte.

Paf.e,.ited Sept. 25, 1923. lp468@945 UNITED STATES 1PA@TE@NT- OFFICE.@@. RALPH Z. HOPIKINS, OF DETROIT .:T,@,:ICHIGAIT. i3,crTLDI1\TC, CO-iq.ST-jtUCTTC-I\T. Application filed October'30, 1920. No. 420 710 1 1 O l l ' d e O . , z @t,,Ttay i-S a se6tio of @ e s,@ i ,t winO (Izl IV766q@ rl-, -it L@,@67,7n tiiat -f, li@,LP-TI Z. 17@o_-xii-Ts a cl oAv fai,. i g. 2 S is a v--,I-tic@IL seet'lon,of' ci@ zen o--' the U-Tiltcd - re,,,dif,,o, at'. a ,vinCt-- @v sill@ i g. 29 @is a b6,L-tori rlaii,of i-,i o-E l-@7ti-yne -tncl @5tate ot a' aiicl@ I,-. i 1)rove@l B@ii.cling Constructir)n, of whicli tli(@ To!'.,oii,-ing is a specification. 's iiiveiition rela-tes to @he c.@) slruct@oii hi of the fl,@ames of v.,,indow aiid clooiopeiiiii-s tn "'Or reiiiforeed concrete b,.iilcl,-.Pgs, pirtic-til,ii,ly of tli,,Lt class of buil-diiigs w,,here,'-n the o-c.ter s-,@,.-'-aces of val',-s, iqoors ,,oo-rs are CO@,ist'ltU'LeC't bi: b',-ocl-s or tini,@,s ai.@e ol@@-' stock or sta-.ldai-d sizes and -,ire pr-f15 ei@ably pro-,Iuc@,,,l iit I'@ conl,,e-yll.-Iltl), 'iocdtcet f@ict6ry, concrete 'beiii u@,@e,t ii,.'Ll-o the )act-@s be'L"@.-c-en the Linits I 'Li@el@ tlie3T ai,e 1)lar@e.'L iii proper positi.oii, Nviierevc-r cles;- r-able. This lilve@'l@Lion consists ir, -,t novo-I 20 1-lat-Lo@i of or blo"IKS ad--pti,.cl 'cb bG 1-i-ei-d )g,2tliei- Li ssemblecl by coil-7i.-eto.-s -which niay be sepirzite from or -Lornied oii ti@, uni'---, as shovvn iii t-'Lie c'Lravvi-p-gs -ln(i Pal-tieL,,.-t a r I y pointed o-Lit in the clainis. 25 In 'Llie dra-win(ys, -LA ir-. 1 is aii elev,,it;.oii o-L' a po, @.4 jo ii oi' a I are see'@ioi-is oii Lhe 1;,--,ies 2-2 a d of ii ig. --L, respec4l-ively. Fiu.-- @- is a - @rortic.Ll seetion @of 'L-Ilie I'l-@i'L-el oT, a c,-Lserii t,..,it ciii30 1)odyin- this i,.ivention, and Fig. 5 is a sil@iilar sect@oji f the si'l tl-i @-eo-'c Ti-i6 is a; 0 i e. ho,,-izo@,ital sectiop. throiigh ,t h'iio@- of this itidow. Figs. 7 and 8 are tii eiid vieiv and ai-i elevatio--q respectiv@ly of -i@ lintel -Lil'lit. ,14'ig. 9 is a liorizoiatal sectio@-i o.-i a l@,,rge scale 35 o'aliingeunit. -Piol-.,10isaveruicalsect ion on a larger scale of a sill vnit.@ Fi-u,. 'LI is q horizont@ll section through a Cloor jaiib sliov-iir.(,r It-,he cloor and hin e F-'(Y. 12 is 9 - 40 a p-ersl)ectiie vie@v,of a --F-lcino- or st6,,) nioni:- be,.- @-hereof. Fio-. 13 iQ' @in end of the unit einbodyin, -!is _,rt-ciiig miL,@.,-ibe, ILiie reinforced bacli:ing thereioi@. riif)-s. 1-i' @- nd 'L5 ai-e vie-w@s o@L@ a @ie plate. Fig. -,-lo @.s a side 45 v;,-.iv bf a Iamb u,,iit. Fig. 17 is ,t il)ei,--i)ectii-e of an ini@er sill. 11-ii;,t, ,ilso sho-wn-'Iii iliy 5. Fi@x. 18 is an inrler elie citi ii iid 19 v o ,i -ol,,Ln of a -"-all u-ni'U. Fig. 0.0 -1@,: -,in ancl Fio-. 2L a P'-aii of A -,vall 50 22 is a I)Iali o-L' a sectioii of a P.-Il ci I)la-.- I I o-@ the e@id o@L a u@iit -@n ' Fig. 2' is a L ti6-piite adiped to e o,e @tli. l@io- 24 is perspect@@i-e of, aii i-iiterior @vall . a. 4-iV4 Fl, 25, .s a 1.,)erspe--, e ol a r,5 sill u-nit, a-iso sho-wii ir, Fio-. 28. '@- 16 is a NV -itel. vertical see'Lioii of a wind'o lii i Fig. 27 t gtiide -,)l,-,te foi- wiildo-vi ,-@sh and ll'ig. 30 60 s et' a e --O-P. on the liie 30@30 the.@l-eof. F io,@. 31 _is a botL-,Om plap- . I ind,Fig. 32 is an@end vie@v 6L a support-,lig 'Pl',Lte for,@tlie sash . I guictes. 33 is a 1)1,,In a-nd Fig. 34 is In e.-id i,ie-w ofct center -Liiiif. for, tli.e-side v@,PIls - 65 and -lintel of a -,viiido,,,7 f@-ame. Fi,-. 35 i-S "III in'Lerior a-ild 36 aii eqd elevatioii of @ a iaci @-1-q unit for t,'.ie iyiiido--w frame. Fio- 37 vi is i rear vieiv aricl 1'7ig. 38 is iii eiid ew of aii exterior @vindo-w sill ii-@iit. S imilt@r rofer6rce cliaracters- refer to. I Ilili:e@ 7 0 i), @rls tlil@oui)-hoLit, the se,,eral vie-v@s. a q wi w F il. - " 0 s ",O 1.@, s ectioii of. a, 'ndo sill in,, tcle of thi,@e-dift'erer-lu sets of sl,.l tiiiits 1,- 2 ancl 3, st,.pi-)ort6d b@ -th6 Nyall of the build- 7r) ing- @v-@iie.Li is fil@:e,"Ti8e built'up o'l oliter vv@all uilits 4 a iid 5-held to(,-e-ther-by the, ti6-plat6s 6. These u--@-ilts ar-, all MO'- @d6d iii -acdL-vvn@iice preferably at a. p@ooorly 6qui.pped factory la -(IC[ cLre so for-med tl t tf@ey iii,,ty 'oe --ttiched 80 to each othei- by m-aiis,of pro perly formi@d r-.ect i's i@ic, tongties. The c o.- i o o r by inteiloc-'L; @ 1'7 ::@ inrer s0 shol,,vEi-,i-Figare f o I-'rn , d witi-i dovetail (-i,o6i7es I'@ to- r-ec-eive coiinectors- 8 (stich as slio,,iii in Fio@., 6), ivhi6li uiaite tilem to- -.he iii,Ue@.ivecliate @sill iinits 2, qs ' cl'cf@,:,4,ed iii do"-ed -'Line- ii-@ Fi in i L @ g. 5, the uliit -eneral'.y-siin@'--Ilar to the,unit shoy,;n n etail Fig 25, havirg the saiiie dov 9. 90 Ai-i outer sill@ up_it 'D i@ shown in Fios. 107@ a-Lid 38 vith its gfoo-,,es -10 ,-O rn-ceive con@qec'LOrs 8 to urii'Ue .',Iu l@-o tl!o.iiiterlreOi-ate sill raember 2. The ]@.ilDer and ou'Le,,, sil'- memb ers rest on thp, oui@er ii nit@ 4 @vliiie t he 9 5 i ntermedialle@ mer,.!.bel-@ 2 rest. oii the 0 - c liqte ia,,tll uiiits-5. These Li @.iits 4 al-e s ho-wn in IA'igs. a iid 19, r o,, 'aleci -i@,ith p 'I I grooves 12 to receive-the toil-ues 1-1- on tlie. e@ids of the tiepl@ttes 6 (Fi,@' 21). 1-@- de- 100 sired, tli6se torgt,,es ap.,-I@ the v,,alls o-, the -,i,ooies 12 may be,- reiiiforeed b meaiis oi. @he etal shells 14 @I d 16 rcspecti-@7ely. whi@h um serve as iiiolcls fo@ tlle adjacc@-,it por'Lions of these c6nerete bui'diiig ui-iits. The ivall 105 Li,-, iits 4 niay be 6,,c@-(l oy -.,-Licar-,s oi roci @s -1,6. ,is sho iii b'igs. 18, !9 wn 'I c@ 22. ancl such - ,ere, @,r desi-ed, qs for b e 4,)Iacecl ir i, oc[s L e - ,el to se L@ n stalle 4 @be ro-,Is 18 theiIs 1 -5'oL the tongues 18 (Pio@. 23). 1 10 , @--Phe tie-pl,-tL'-us 6 ancl t'iic, i-iltermecli,),-Le, wall -v@d -,, 11 li c , iil ,,.iiits 5 -iaay be l'orm @@it, ot hes 16 I

(Figs. 20 ap-d 2 1) i-espectivel@ so that they m,,iy be la@@ci ul) ii-i a -wall, ,is slio-wn in Fios. a ar,@, 28.- these units have been 1,,Lid @1-9 is poi-tre@t i@,ito the splees bet-@,-eeT-i tlie,iii, -,ii air space 20 beiio, 1,-,-.It if deL u TI@@- coiler(@te Nv'll coiai@-)ine 'he b ildg@cl s iir.],s i,.i'lo a ri itriieture. 4- ai@"-' sli@)iyii tlie, lid,tel uiiits 9-2 i,j i,, casiii,), ii,,-its 2' ancl outer @4 b-,, riieans of coiiiiectors 8. 10 lie est dii@e-3tl, ',,he ciii'us 22 d tiie outer U-,- Its 4 3@est oii tiie -vvincloav f-asilig ,,,,iii',s a-@l(l, c-)LI. These c,@is;iig -tti-.its extend 0 'lie @l 1 aci- ss i , top @t cl theii doavn the sides of i"@l,-.@,cl.OA"-$ zis si-to@vii i',l Fig. G-, aid are LL!IlLei,[ '-o l,hc,, ve alid iiiteriiieditlte -f ... u.-.iits by me"Llls O-L' the co,@iiir,,ctors 6 exteiid i--,ito --i@ooiTes 234 or 23b t, 5 de20 ol-i -w-lietlieil the -Lii.-iits are ,tt tl-io top IATIle,,l tl-@-, sill units 2, ti,@e 2@,,) .),iid the tipri(TI-it Liiiits e",- "O clool- or Ay'lidow opc,,iiiiigs s,-op m- e3,al) vs '-)6, 27 ai-id 28, respee25 1)1-.i.c(,,d iii tjie i)- iol(-Is so tl-i,,tt 4 1 ( ill-' (, ,@) 10 1 C YN' i I IL positivel@T ivitli these sto-,,) 'tliese be,,ng foriiied ivith clo@-tait t,oilgL,,es to riilI1-:0 the coiinectioii ,-,love 0 it e Tiic-se stop viiii'cs ire -pre-@L@er30 'I@bl,y o-f ;.roii. 11- -To i,, d riiiiiibei@ oi Iiiiiges 9,9. seupri(Y ,lit stop ineiii'@)ers 28 and '('LIC', lyeriibers 30 of L c,,tseh,-ielit sisli or clooi,. The parts @ 28 ti- e 35 p.-e'Lc,,i-,il)ly -@-'orriieet with t gi.-oovq 3@,@ to re-,G,ive rlb 3") oii the s@-,sh or cloor. If (1,esiile,Oil -t jL-,,isLIoiied strip of metil iiiav 1)" iTi tl-ie rfeiiil-@er 25 aliel tlle s4L-oT) 'uii:"t 28 slid iiiu-o positioii, ,io Fi,,. 9. '!"lie stop uiiits Lre oi tl,,e svliiie leii-tl-i as the coiici-ele blooi@- to -,Yhich they V,,.,e ,ttt,,icl-ied, a ti,@e3, ii-ia-@ lie ir. lo,,ig(@r so qs to bre,,tl@@ 'Olli'us vvl'cli the blocks. 45 The iiil;ts (Fig' 4) ,ire pi@efer,,tbly to t,lio Si,- eppecl upper iiielnbc@r o-@ i@lie s@isli, to joiiits, ',Lliotl Ctesired,, @t'iie co,.ici:-ete blocl@s 2'-) iiiay be )-,Ito slieet re'1)1-'L-orce", eiits '.6 ,-O II Oi- -,i @,o re(@eivo Llie C Oilliectors 9 @,i-id the I i i I ocli 'S !esl)ectiie!)T, ,is ii-iOLic,.itecl intei-iiiediate, sill ii:ieii--- bei-S t]So "@ie riolde(I oiit@o 'ulie s,@ioet i,, -ieta' f o---i's 38 (Fl(,r. 10) cti,e @,,d,,@pte-,l to re5;5 Ili(, sto,@) i,,I-iits 26. Thc-se stop iiieii@oers -Li't @iieO, tli g u 0-cs '09 otiid the ribs -L'o'@'riod -witli C'Lraiii,,,,ge -,12. A s@li'telcl str-ip @13 o-@' rLibber or -%"- Oo@d be to IL-,iie bol,@tom meiiiGo 1)(,r o' tli@- -ivii-ic!oN,- 'sc@sh 5). ii-i F'I,-S. 11 to 16 iiicliisli-e t coiistriictioii u -Poic dooi@s ,iiid c,,iseiii.eii' ,viiido-,vs ot tile s,,,,iiie (1--si-gii- ;Is sc-e'L,,oii lhrougli vcrtical I k, c,o- slcl,,- inem, e oers oi the casing alid cloor. The 1,468,946 f-acing units 45 ,tnd 46 ,ire -Linited by tiepla'-es 4"T -,vhiell a,,e shoivii to 1-itve their tongties 4:8 protectecl by the sl-ieet n-ietal 1- leihbors 49 @'Fig. 14). The iiiteriiiedi,,tte ri-ieliiL-ei-s 50 ,ire - Linited to the f,,tciiig blocks 70 -ieaiis of co necto,@!s 8, these 45 -.iid 46 by n n iiier@ibers 50 litli,1711'10@ gi:ooves which receive iors I ced by ri-ietias of 'Llie sl-ieet th@,, colillee <t -iet, ii tl reeriibers 52 (Fig. l'), if cles'red. TI-ie -,Toi-tical iiieiiiber 53 of the door is 0 - 75 c n iiected to t'iie st6p n eiiibei.,s 55 by tl-ie Iiiiiges 54. Figs. 26 to 38 ii-iclilisi-ve sho-vv- -windo'W fi-Piae adapted foi@ ,t sli0iiiig-sas-'Li, ivhich fra iii(,, in,,.y eiyibody the saine iiiiier sill - Liiii'us so 1, ou-'Ller sill tinits 3, wall uni-ts 4 5 ard 6, coiierete fills 19, iliner f ace plites 23 tnd olill-'er fac-- plate@ -04 -s the \YiiidovT ,iid door fr-,tiiies jtist described, the s,,tiiie co@.inecto,@s 8 D--itLy be tise@t to tiiiite thes,, 45 -nediate s'll -- -lerfiDe-'s 60 r,.nits. The interi 1-L @l (Fio,. 25) 11,1-,Te grooves 9 ,tnd up@va dly exn r t@ei,,eLiiig f-l@liiges 61, -WI-iicli p,.eveiit si)'asliiii-- i-ip b@ick of the IoNver s@,ish ol' the wli-idoav. Coiiiiected to the illii-Ir titd o,,iter 9( f ace uiiits 23 aiid 24 %t tl-ie top of the,- Aviiiclo-v; opeiiiiig ,i@re thi@, viiiii's C)2, -,Illd at the sides ftre the vertical LLni'us- 63, aiid secured I to tlien-i by meins of the to, gties 64 Lr6 the shallow cliannels 65 t6 Nvliieli the sl'Lsii 95 e -L ffuides 66 m-,ty be connected by Di Pns o' t-l-i e WereliTs 67. The sectioiis of these guides 66 ivhicli -.re secured to the liiltel 62 ill',Iy be, o@ Iny de sirecl len(,tli, but 'or (f tlie upriglit 100 L sicles of tl7ie casing I prefei- to I-Ise tliree seetioi-is, Nvheii the - Lipl)er and lowcllr @lidiiig s@.,,s'l,.e9 cLr(,, of substltntiall the sii,,ie heigiit, y tncl to have the upper ,tlid lower sectioiis of the si,me lengtli aiid the. m'ddle, i section 105 s6meNyhat shorter. The -Lipper and lowe:_, sectioi-is 66 m,,ty be releas6cl -,tiicl re,.iioved Nvh,eii tl-ie s@ish Lre slid do-wn -,Lnet tl-ielt up, a-9 ter wl-iieli tlie-middle-sectio-ns ii-,ay be released ,tlld permitted to, slicle d'o.Aiii. "L'Iie 110 sasli IllaIT then be s,%vuiig otit. . Tlip, adjaceitt tlle ivirldoi.v - opeiiings is prefer,,ibly foi,iiied with -,i space 68 Fi(r 27 for tiie s@Lsli -@A-eigl-its 69. PLIlle@'S @o 1-" or be of aii I the sash cords 71 itia@, esirecl 115 ), c pl.Ltes 66 in - sti-ticti-ire i-id iiiouiite@l in tlie any desiped recesses bc,'ii- left iii -Lilleys -icl the ujiits 63 foi@ the p ,,i , cords otl-ler clesired ineails iilly I)e e-,iiplo-yed to couiiterbil,,tiiee the sasli. The cli,,t-,inels 65 120 ,tv be on-iittecl 'f desireci ,ii-id ,@,iiv otl-icr ill I m,,ty be 1-ised to h,old, th@ guide plates 66. The several uiiits miv tll be i-eiiifoi@eed by providing slie-,t Sliells'foi- selected S-Llr- 125 -,@aces. as zLd,@eated in ITi(,--s. l@', '-)I ,iiid 22, whei-ever sucli reiiforceiiielit,@@ i-iiav I)e fQLiiid aclyisable. 1?%7hile , e coi-istr@,ictio is p@rtictilarlv Ys it @S 130 adapted for window and dbor opeiiin(,