US2381548A - Chimney construction - Google Patents

Description

Aug- 1945 4 R. w. McLAUGHLlN, JR 2,381,548 v CHMEY CONSTRUCTION Filed April 29, 1.942

l Patented 7, 1945' A* l nandiedf-andfrapidxy assembleey building* around the f ehiinrfeyi,

sanne? tqafprzovidej ineens-fief 'rein 1ste-df vflue gies-condensateffttm the:

, .,t'onrdvidejans fesse `rtt-s's'emtu beobvious and W' d dit; and:

2 t 'come l l 1-; Thsfinventiornfrelatesftot Yan improvedfeliirnney I constituction;` laiidimorefnenticular-1ysto-a2chirnifiey:

ycons'trucltiolfii; which'. the "ent'i1-'e2y weight yof ,the

chimneyissupportedbythe'noof oitheybriilding: I

y* lffAn"fofbjectzofi the? inventionmis': tos-.fnrovidefa y chimneyi which may. be readily eheanlyfc'em Lfabricated sections, whicn..ist iight in weight,

durable, rsafefandweflieient andi IWlii'clfimay if desired; be 4disassembled andi-.2 :te-used' anothen Ivide "adequt'el4 ventilation. Yfcr' hetattie ofthe to prnvde' means'. for protecting"exnoseci'f` se'ctierrs".` 615 the lmiey fromwontact'fwith sinnmmable material teinte'- pined itt` the A eenstriuetidn'nereinttfteiy set" forth nitneufs eefthe application @which 111:- befindiestedffin'tneelaimsn f v if Fori af' sti-llQfliitlieii understandin@ of "tlie fmvii `tion, reference should be had tothe following* detailed.clesciption. taken in connectionwith the aocompa'nyingfdrawingwherein: I Tf1-fg. Iigiureffll is at-view? in vertida-1 sectionzi-Cf aportion of thereofandlupper-portionlof thefvchirnney; of a: dwellingy .equipped Awith ,frat-preferred feinbodi ment of the inventiontw j z Fig. 2 is a plan View of the; top.,of ,thechimney I Witn certain Qpartsssliown. n ,dottedg lines,

clanty vieiiv` l-lnartiily ing-elena orilandftpan-Q Eigv 5i is, ar detail,viewe'inavest/icalY section'. ofla portion of." affine.` embodyiirxgs the `invention In the yemitc 'd;i\In'entf of ethefinventionfshown-,in the drawing; the-chimney iiue comprises: eithera. single longJ uessection lor` preferably a, plurality-y of; relatively shortandyeasily handledr seetionslo standartd'gzlength; forfea'fa-nfrpleA three; feet; bolted 051' otherwise fastened-together :to provide a con;-

tinuous fluegev and suspended; inx4 at manner here-.-

Alltl'ie intermediateiuefsections @l 0: may; if defsired, loe-.fdfeifitinai.-` Each may: comprises-esubstantiallywcylindnieal ,ste'eifftube l-Ufls of suitable diametei,y for example eight, -rinehesj having f its innerlandf outer y-sunfanzesi ,coatedwitht a vitreous enamel layer,lflir2;l l Eachfflue section shouldtapen .u

tion, ofeacfn fiuefseotinfmalyfle provided witi an asbestestpaperr gaskehl 211311. other' suitaliier means to insure-:fain: adequatelyftight betweensucres;

sive=sectons". "Eachsectiorr may bezpr'ovd'ed with y lugs'. or, "other 'suitable-'bolt rece/ivingk means 141i at each en'd thereof"'andipeferablyfwithga-spluiality;

for examle'"three,-iofl such lugss ati eachrend'; evenly yspaced around. the r-outer` surface of the section, to insure rapidfandfeasy' assemblyfof seo-- tions and fa'de'quat'e support" i:eiiiveen?v sire-Cessive 1 means-for. lx-iougnipingthe ne section, thereom The lowermost; chimney,flueY section v24difllers from-"the othersfinfthat:itisffprovided withsan.

' and theadjacent lroof pithelstnmtune sho-wnin Eig Y sections;

' Ihe uppermostfand' lowermost sections each differs slightly from' ther stanclaidform offthe im termedat'e flue Asections`v .Thej'uppermost :nue-2 section llisfprovidd adjacentyits'npnn t'ed-sie ,withva plurality 51A apertures'adaptedftmreeeive they rivets or belts `imy by whicnfit "isv connected nientf as yhereinafter-f des iriiged; It w parent, however, that the] uppermost f manif desired, beidentieal 'withtheinternediate n sections1 Ill1 in. ,which caseY thegange 32,0- vvlfillbl; be. provided` with a., plurality Yof., lugs to,..pr ovide yellonxzv,v 2,6', adaptedzfto-receive, a section onstoxle-1 pipelitv leadirrigz ltriomf the furnace on. heater 3.0; Tghe seetion- 24l1s moreover provided.4 at: its.flowerI end Withyt. suitable oleanout cap 3-2 .andwi-thfa; pipe or. drain: 34;. Thisf last-mentioned/element is 'oi considerable vimportance.: Itis intended that it remain ogeng, thuseprovidingatcondnit;

forl the-remeyaljof flue; gas,l condensatie, which collects rathen rapidly the bottom ofrvtl'ie f y 2,381,548 f 34 is shownas'. Xtnding therethrough; It will ,be apparent, however, that drain 34 need not e'xtend through a cellar oor if the presence of a small amount of condensate.the1eon is not jectionable.

Tests have established that a chimney made of flue sections such as have been described will not ordinarily become heated sufficiently to approach the ignition temperature -of wood. For example, if stack gas temperatures not exceeding 835 degrees F. are maintained, the surface temperature of that portion of the chimney nue likely to passthrough building construction will not exceed 250 degrees'fF.; a. temperature which provides an 4adequate safetymarginI even .should `there be actual contact' betweenchimney flue and a` portion 'of' the 'framestructure of the dwelling. In order, however, to insure against such contact it is intended that where the chimney passes through aceiling, iioor or wall, means, preferably of poor heat conductivity, should be provided to insure the positioningY of the chimney flue between, `and not in contact with, adjacent studs or joistsi' Such means-(not shown) may comprise `straps toposition the flue, or asbestos packing or the like.` Moreover, where the chimney 'flue fis'likel'y- 't'ocom'el in contact' with inflammableV material' as, for example, f in an attic, where lsuchxnaterial may be placed against the flue, a` modified'form of flue sectionmay be employed.A Such a modified' form of section is shown in' Figs. 1 and 4. 'Ihe basic 'flue section l0 may be provided, adjacentits upper-and lower ends, with-collars or rings 40 of heat insulating material,l and these collars may support an outer cylindrical shell42 of steel, for example. This shell may be"spaced suficiently from the flue sectionl Il! toprovideA adequate protection and it may be vented as atM in several places to insure circulation of air therethrough. l

1- In they embodiment of the invention shown in the drawing, the chimney flue such as has been described, `or anequivalent thereof, is suspended from. the roof of the building in the following manner; A `supporting member V50, of any deof the same general cross-sectional shape as the member 50. The element 22 may, however, be somewhat longer than the member 50, although of approximately similar breadth. In addition to the central depending circular flange 20, to which the chimney iiue is afxed, the member 22 is provided with a depending, rigid skirt or ange 64 to which the element 50 is affixed as at S5, by bolts, rivets or other suitable means along two opposite sides. As will be clearly apparent lfrom Fig. 1, the upper edge of the supporting member 50 is spacedlfrom the top of the chimney cap element 22. Moreover, the member 50 is of considerably larger4 internal over-all diameter than the `diameter of flue section I6. It is thus `apparent thati surrounding the chimney ue I there is provided a passage for Ventilating the sired sizef and shape,-but preferably rectangular in `cross-,section and made of sheetsteel or other suitable-material` of such rigidity and strength asto perform adequately its intended functions, isMnailed-orotherwise affixed to two adjacent roof rafters 52, alongthe center 4lines thereof, as indicated at 5'4in Fig. 2. As shown, the lower portion` of the .supporting .member 5B Vextends laterally 'as a skirt 5B, which serves as dashing. Itis through this portion of the supporting member 5D that `it is affixed to the rafters 52.` The final roof covering,v whether shingles or other material, may o verlie the flashingSt',` as shown diagrammatically in Fig. 1 at 58, while the iiashing may rest directly on the rafters 52- or upon theboards used to rough-close the roof, if used, as isliown in Figs. 1 and 2 at 60. Ifdesired, the upper edge of the element 5l) may be rolled over as shown most clearly in Fig. 1`fat`v82 to provide increased rigidity and strength.

The chimney cap element 22, also preferably of,she`et steel or similar'material, is' preferably' attic, thus preventing condensation therein even though the attic is not otherwise heated. The arrows 10 illustrate how heated air may flow from the attic, up along the chimney flue and out between the top of member and chimney cap 22. The depending flange 6d is preferably of such length, as clearly shown in Fig. 1, as to provide protection from `the weather for the ventilation passage just described. Where affixed to member 50, flange 64 should of course be against the outer face of member 50.

Suitable standard meansv (not shown) may be employed to protect the flue opening in the cap element 22 from rain, snow and the like.

Ashas been mentioned, a chimney construction embodying the present invention is admirably adapted 'for use iniinexpensive dwellings of the prefabricated and demountable type. Such a chimney is itself demountable. It may be salvaged entirely, should the dwelling in which it is in use be dismantled. The individual iiue sections may be re-,used toconstruct other chimneys, or the entire chimney structure may be reassembled in a new location. Furthermore, in the initial construction and in each re-use of 'the flue sections, the 'assemblyis a dry job.

No masonry is required and the building cost is thus substantially reduced. .The method of suspending the chimney flue *from the roof, as herein described, has beenvfound to be greatly preferred over a construction in which the chimney is supported from the bottom. In fact, with chimney flues of the character described,` the overhead suspension of the present linvention has been found practically a necessity.

Since certain changes may be `made in the above construction and different embodiments of the invention could be made without depart-l ing from the scope thereof, itis intended that all matter contained in the abovedescription or shown in the accompanying drawing shall be interpreted'as illustrative and notin a limiting sense. l

It is also to be understood that the following claims are intended to Coverall the generic and specific features of the invention herein described, and all statements of the scope of the inventionwhich, as a matter vof language, might be said to fall therebetween.

What is claimed is:

1.Y Ina, building construction of the character described, in combination, a chimney comprising a plurality of demountable ue sections, means for` fastening said sections together in substantially end-to-end relation, means, including spaced rafters, providing a roof for said building, a chimney-supporting member, rectangular in cross-section, aiiixed to a plurality of said rafters and a chimney cap element affixed to `the uppermost flue section and to two opposite walls of said supporting member Whereby said chimney is entirely suspended from said n roof, said cap element having a downwardly dea plurality of demountable i'lue sections; each of said sections tapering gradually in diameter from a maximum diameter at its upper end to a minimum diameter at its lower end, means for fastening said sections together in substantially section positioned within the upper end of the next adjacent lower section, means, including spaced rafters, providing a roof for said build,- ing, a Vchimney-supporting member, rectangular in cross-section, aixed to a plurality of said rafters and a chimney cap element aixed to the I uppermost'flue section and to two opposite walls of Said supporting member whereby said chimney is entirely suspended from said roof, said .cap element having a downwardly depending flange spaced from and positioned outwardly of the two walls of said supporting member to which said cap is not afxed, whereby there is provided a Ventilating conduit, shielded from the weather, between said rsupporting member and the uppermost flue section.

' ROBERT W. McLAUGI-ILIN. JR.A

vend-to-end relation with the lower end of each

Images