US1391871A - Tubular-radiator construction - Google Patents

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S. VOLKl TUBuLAR RADATOR coNSTRUCTIONl APPLICATION FILED MAY 26, l9l9.

,atentedSe )t. 27, 1921.

ioined to tho middlo ta ered oftion 3, aS desoflbed, vvh1ofl po Inits the rear end of the tube, vvhon lt lS puHed forWord endWise, to slide out through the opening left by the front eIld of the tube, regardleSS of in which (1ireotioI1 tlle tubeS are nShed out. The so1deI' vvhioh iS fun iIlto the SpaceS betveen the heads of the tubeS may entirely fill theSe S ceS, of may be restrioted to the outer poftions of theSo Spooes, So thot only tho extfeooe ollter edge PortionS of the tubeS ofe Soldefed togefhor, thereby Inking it oasieI to nlelt t11e soldeI vvhen it is deSifed to feInove any of the tubeS. 1he HoIne of a tofch, foI exaInPle, dirootod againSt tho outer edgeS of the thin loyefS of SoldeI, or even direotly into the lI1ol1th of the tnbe itself, vvi11 obviously be Suificient oo Inelt the SoldeI round the )artiolllar t11bo vvhich it is deSifed to feodef feInovable by the me1t ing of the solder. The tuboS oon be mdo of Sheet II1et81 of aI1} suitoble chofootef, S11oh os tht ordinorily en1Ployod foI thiS purpose. 1 fefofobly vvhen Inade of oo er, the tubeS are firSt givon o both in n1elted Solder, to givo then1 oooting. In ossoIIlbling the tubeS, they are then bonnd togethef iI1 the deSifed relotion, sonlevvhot tightly of one side of the 1adiotoI' than ot the ot11er, so thot the onds vvill not bo ex8otly tight togetheI' at the othef Sido. The face of the fodiotor is then presSed downWardly into o tub of IIlelted Solder, So that the lattef vvi11 oreeP in betvveen tho endS of the tubes vvhioh are not held so tightl togother, thus not only Inelting the prevlouSly forIned solder ooating on tlle Square heods of onds of the tubes, but also fi1]ing ony go S of Smon S aoes Whioh moy exist betWoen the ot sideS of the Squafe hedS of the tubes. ThiS oon1- lete1 binds the tubes together ond SoolS the SpaceS betveon either tho ffont of tho foor side of the fodiatof, and then the ooIdS oI' vvireS 01' 0ther binding 8re ren10ve(1 t0 1 low the endS of the tubes at tho other sido to s fing vory S1ightly o oft, ond this Sido of the fadiotof iS then fofced dovvnvvardly into o bod of Inelted Solder, ond the tubes ot this sido of tlle fadiatof vvi11 be Soldered togethef in the IIlonnef revionsly de- Scribed. ThofefteI', of co11I'se, S pre viously Stted, a suitoble caSing iS plooed oronnd the radiator, So that the vvator Wi11 be oonfined in the S aCes betWoen the tubes- Thus,vvith this constrnotion, the ame of o toroh When directed into the open end of a tnbe vvill not on1 7 nlelt the soldeI' around thiS end of the tube, So aS to looSen the squore hed of the tllbe, but Win olSo Inelt tho solder oround the other end of the soIne tube, inosInuch oS the Honle and heot vi11 )oss entirely through the tube, thllS 1ooSenin both endS of the tobe at the SoIne tinle. Then, by using Poir of pliers of other too1, the 10osened tobe oon bo Pl111ed poftion of the tuboby ol1tva 1'd, ond the reinforoe in the end of tho tnbe i11 tend to )revent the tool froIn in jurin the sheet IIletol of the tubo, or froII1 diStorting the end of the tube, vvhioh iS one of the obiects of the feinfofoe I)1e viouSly deScribed. In forn1ing the tubes, it is found that tho contraotion of tho Iniddlo ortion of the tube, by forn1ing the longitudinal oorfugations, So thot the tubo beooInes of leSS dianleter, SeTveS to forIn the tapered ortions 3, as it iS hefe that the oorrugotions terIninate or diSappear, eaoh Cofrugation preferably hoving o tapered end, b11t these endS terII1inate shoftl of the f1t SI1rfadoeS 11ioh fofIn t11e SideS of the Square heads of each tnbe.

Thus eooh tube is externolly SII1ooth and free ffoII1 edges oI' roieotions vhioh 111ight interfere vvith the inSertion and fen1oval of the t11bes, and eooh tube iS infern11y reinfofoed at eoch end thefeof, So that the tvvo heodS of the TadiotofS, each hood boing 11ojde 11p of the Squaro ends of the tubeS, afe vory Strong and rigid ond ado ted to Withstand the ex anSion and oontraotion due to ohongeS in teInpeftufe, aS vvell as other StfainS, nd

vvhefeby each tube iS individuolly Ten1ovoblo endvviSe, in the Inannor Speoified.

.By providing the interno1 reinforoenentS the fectangulaf headS of the tubeS afo ren dered nonooIn reSSible, so thot the oon1pfeS- sible IIletol portion 1 of eooh t11bo tero1inotos of each end in o nonooInpressible head. In other vvords, the int11rned ortionS pfe vent the ooII1 )reSSion of tho tube, vvhich II1ight ooour in oase of freoZing, froIn extend ing into the heods, as tho inneI' edge of eooh )ortion is in osition to fevent the oo11- proSsion from extonding from the topored portion 3 iofo the rectangulor heod, Whefe by sooh ooInpreSSion vvi11 not tend to distoft tho feotongulor hedS in o Woy thot Inight 1ooS,n the conneotionS betvveen the headS, 01' in vv8y thf n1ight tend to pro doce trouble of diHfoulty in the reInovo1 ond Subsoquent feinSertion of any of tho tubes. l

vVhat 1 olaiIn os II1 invention iS Sheet metal tubes forn1ed vvith rednced Inidd1eportionS to provide Spaces betWeen then1 foI' the oiro11lotion of tho vvoteI' nd hoving reotongular heods vvhich oro oxternoHy Sn1ooth and inteTnoHy reiI1forced ond vvhioh afe held together by Solder Whioh Seals the SPaceS to prevent leakage of the vvater and to fender eooh tube feII1ovb1e endvviSe fvithout diStorbing the otherS odioent thefeto.

2. A fodiotor Strlloture aS Speoified in oloin1 1, Soid reduoed Iniddle poftion of eooh tube being oonnooted by Shoft )ortionS fodering therefron1 to the feotangulof heodS,

3. A radiotof strnoture adS SPooifiled in o1aiIn 1, each tube being t fnod ot opP0- site endS thereof to forIn the Said reinforce inSide of ech head.

A radiator structuTe as specied in claiIn 1, the Iniddlo ortion of oach tube being coTrugated longitudinally inSide to re duce the diameter and Tender the tube C0In )reSSible betvveen Said non-coIn reSSible internally reinforced headS in caSe the nter freezeS vvithin the radiator, having tapered oftionS betvveen said headS and the Iniddle ortion, and sIid corrugations extending into Said ta ered )oI'tionS and Sto ing Sho t of the einfofce in sid headS.

5. A- Tditor Structure as Specied in clniII1 1, the SideS of each rectngu1r hond being a11 diS oSed ontside of the externol dianleter of Soid Iniddle portion.

6. A radiatoI' tube having a rednced middle orti0n 1, S uare heads 2 the sideS of vhich 1I'e onSide of the external diaIneter of said lniddle )Ortion, ta )ered portionS 3 to I1nite the n1iddle ortion vith Sid heads, and in-tufned )ortionS fofII1ing o liI1ing for the ehtire interior of Soid square headS,

providing a compressible n]iddle oI tion 25 betvveen non-conlpressible heads.

SIDNEY vOLK.

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