US 2696279 A
Description (OCR text may contain errors)
2 Sheets-Sheet l INVENTOR. CIC/L 5CHOF/ELD ATTORNEYS Dec. 7, 1954 c. scHox-'IELD -STEEL DOOR CONSTRUCTION Filed flan. 17, 1951 Dec- 7, 1954 c. scHoFlELD STEEL DOOR CONSTRUCTION 2 Sheets-Sheet 2 Filed Jan. 17, 1951 INVENTOR. CEc/L SCHoF/ELD ATpO/QNEYS United States Patenti@ STEEVILJ. 'DOOR ,CONSTRUCTION v.GeilS'cl1oield, Lakewoodffohio, `assigner to?. Republic '5-Steel1 Corporation, Clevelandfhio, a" corportionof `-`NeWIJersey ...Application Januaryi17, 1951;"SerilNo206g443 ZJClaims. (Cl..189-'46) The, *present invention 'relates generally .to A.the :art of making doors and lis more.particularlyrconcernedfwith novel-fabricated metal doors.
`Among .the more seriousvproblemsl facing; those; skilled in Lthe* art of making-doorsofrnetalrand .especially fabricated metal doors, are.theover-sizenand.over-weightofithe doors and the .high cost 'ofv their: :manufacture :dueto-:the largenumber of operations involved-in :makingand assembling the separate parts;.and the complexity, numbenand variety yof dies required .to :make .thesefseparatefzfparts Oneimportant difficulty concernsgthe mannergofsattachment of the two main door parts so thatzithefxresulting doors are not too thick and bulky and yet are open suiciently through their ,midsections during ithezassembling operation so ,thatsecuringmeans.therefoncan be located and xed in place'readily and'rapidly. Another related diiiicultyv pertains to the insulating rand cushioningof metal doors in order to reduce, insofarzas possible,: 'shoek transfer between two mainbody :portions offthe'il'door. Despite the customary bulk and thickness of such .ifabricated doors .the problem yof providing I insulating;and cushioningfmeans has not heretoforesbeen satisfactorily solved andas; a result such .desirablemeans areinot-z-normally provided.V
.'*In accordance with my -inventionrethe variousjshortcomings, diicultiesand. .disadvantagesof the prior art, including those setoutabove, can-beovercome and additional-.advantages can, at the sametime, be obtained. Moreover, -these novel results can-:bergained withoutincurring any economic disadvantage either from the standpoint of manufacture, installation or maintenance of these doors.
Those skilled in the art will gain a further understanding of the present invention and further appreciation of the importance of its contribution to the art upon consideration of the following detailed description, reference being had to the drawings accompanying and forming a part of the specification, in which:
Fig. 1 is a side elevational view of a fabricated metal door of this invention, parts being broken away in the interest of clarity;
Fig. 2 is a fragmentary, top plan view of the door of Fig. 1;
Fig. 3 is a fragmentary, sectional view taken on line 3 3 of Fig. 1;
Fig. 4 is a fragmentary, vertical, sectional view of the door of Fig. 1 taken on line 4-4 thereof;
Fig. 5 is a fragmentary, perspective view of an upper rib of the said Fig. 1 door and a tie bar assembled with said rib;
Fig. 6 is an enlarged fragmentary view of the door of Fig. 1, indicating the structure and arrangement of latchsupporting elements within said door;
Fig. 7 is a fragmentary, elevational view of an edge portion of the Fig. 1 door, showing an opening therein through which portions of the latch mechanism may project;
Fig. 8 is a perspective view of an element of the supporting structure for the latch mechanism of the Fig. l door; and,
Fig. 9 is a fragmentary, vertical, sectional view of` a portion of the door of Fig. l, taken on line 9-9 of Flg. 6, through the latch-supporting portion of the door.
Generally, a door embodying this invention comprises spaced front and back panels, a plurality of ribs secured to the inner side of the front panel and provided with transverse openings, a plurality of ribs secured to the ICC innervzside, ofthe :backrpanel' but, offset relative .to Lthe front` panel' ribs and. substantially '.:paralle'ling ,.ithem:i and having transverse: openings 'for' registry with :the openings in 'said .front^;panel'ribs,zand means .including tiebars to be .disposed between gthezpanels: andto lextend".through the'gregisteredcpenings of :the-:ribsand tie thefiribsftogether and hold thepanels;in.rpositionwith respectfto eachother.
More specifically, .and with particular regard to the drawings, a typical door-D:of thisinventioncomprises a; generally channel-shaped, rectangular-,fsheetmetaLLfront panelal having ainwardly, directed relatively. 'short :ilanges llextending substantially the. full length of the-:element on.or1e:sideand extending .alongxthe otherside from pointsadjacent to the topand'bottomofv the panel-to spaced-points in ;an :intermediate: portion 'off saidpanel. A second, or back panel.l3, suitablyiofthesame .shape and dimensions 1 as panel 10,1. isA provided'ifor: cooperation withpanel. 10..to 1deiine ithesides and edges. of the .door structure,.ilanges.:14.'opposing zand. being .spaced closely to corresponding.: angesll when .the panels. are..assem bled together. Panelsltl and 1'3iare secured .together `at spaced kpoints .along-their edges .by means of tack. welds 15y between said opposediflangeslland.14. Flanges; 11 and.14.and..sides.of.;panels;:1tland 13 are partially.;cut awayz'onfone,:sidentordene an opening 1117 in :theedge of .'doorzDv toaccommodate portions `of..a suitable. latch mechanism, which forms nopart of .thisainvention-.and .is accordingly not illustrated. :Panels ltliandlnare'further provided with registered apertures 18 adjacent to -eaid cut-away;side;portions .toreceivezparts-of said latch mechanism.
A-lrzfpluralityrof generally. channel-shaped ribsl20 having relatively short flanges 21 .extending outwardly :from flaring channel sides 22 are secured to the innerf sides of the panels l0, lianges 21 bearing.:againstvtheapanels and-:suitablyybeingespotfwelded thereto` ataa number of spaced points. :Ribs 20iare. so dimensionedlengthwise that itheyfidoinotnextend:completelyfromfedge .to edge ofz ithe;.rpanels butzaterminate adjacent thefoppositeedges thereofaand short ofl :the sides. fof .the panels. These f ribs are :furthermore disposedrsubstantiallylparallel Ito' the .top and ,bottomnedges 0f panels/.'10 .andi 13 and.- are provided near. .theirfiends zwithl transverse: registered apertures l 2'4 in their sides in which to receive securing means by which attachment of the front and back panels may be made, as will be described. The ribs of panel 13 are offset relative to those of panel 10 to permit assembly of the front and back panels with apertures 24 in register, the ribs of the two panels, however, being relatively closely spaced in four spaced groups, as shown in Fig. l, to provide maximum strength and stability in the resulting door structure. f
A plurality of sheets 26 of flexible, non-metallic insulating material, specifically heavy corrugated paper, are glued to the inner surface portions of the panels 10 and 13. These sheets of paper are arranged in such a manner that when these panels are assembled together, as shown in Fig. 4, the webs of ribs 20 bear against portions of these sheets and the ribs therefore do not come directly into contact with the opposing panel elements in any instance. Felt or other insulating materials of commerce, may be substituted for this corrugated paper for his purpose, as those skilled in the art will understan Two tie bars 30 are employed to secure panels 10 and 13 in assembled relation, said bars extending vertically of the door through registered apertures 24 and having end portions normally disposed above the uppermost and below the lowermost ribs 20. These bars 30 are generally channel-shaped and they have upper ends formed with tongues 31 which are bent to a iiat or open position to engage the upper side of the upper rib of the panel assembly, as shown in Fig. 5, whereby the tie bars are retained in position against gravity when the door is in upright position. The lower ends of the tie bars are each tted with a channel-shaped cap 33 which is tack welded to its bar 30 so that these bars may be retained in place in the event that door D is inverted.
The upper end of door D is closed by a channel-shaped cap 35 having closed ends and spot welded in place with its side and end portions in engagement with the upper side and edge portions of panels 10 and 13. Cap 35 is provided with two spaced transverse apertures 37 in its web portion and with nuts 38 which are welded to the under side of the said web in register with openings 37. Nuts 38 may receive and engage threaded ends of hanger rods which in turn may be suspended from wheels on an overhead track whereby door D may slide edgewise in the customary manner, this auxiliary structure being illustrated in outline in Fig. 1.
The lower end of the door may similarly be closed by means of a channel-shaped iloor 40 having an open and a closed end and being secured in place in the lower portion of said door by means of spot welds between the sides and closed end of floor 40 and the lower side portions and edge portion of panels 10 and 13. By providing oor 40 with an open end, this element may receive and engage stationary guide and stop means (not shown) to control the motion of a door to Some extent and prevent derailment of its suspension means.
The supporting structures for the latch mechanisms comprise a group of four elements arranged around openings 17 and 18. The structures include two pairs of angle irons 45 spot welded to the inner sides of panels 10 and 13 adjacent to the upper and lower edges of openings 18. A pair of channels 47 are similarly secured with their edges opposed to panels 10 and 13 adjacent to the side edges of openings 18. One of the channels 47 has a window 48 (Fig. 8) in their web portions for registry with openings 17. Thus, channel elements 47 and angle irons 45 cooperate, as indicated in Figs. 6 and 9, to provide a compartment within the door to receive the latch mechanlsm.
Having thus described the present invention so that those skilled in the art will be able to gain a better understanding and practice the same, I state that what I desire to secure by Letters Patent is dened in what is claimed.
What is claimed is:
1. A light-weight, sound-insulated and cushioned, fabricated metal door comprising flanged front and back sheet metal panels joined together along their edges and dening a hollow shell, support means in the shell for the panels comprising a plurality of generally channelshaped ribs welded to the inner side of the front panel and extending toward and having webs disposed adjacent to the rear panel and a plurality of generally channelshaped ribs welded to the inner side of the back panel and extending toward and having webs disposed adjacent to the front panel, and sound-insulating and cushioning means in the shell comprising sheets of exible non-metallic material attached to the inside surfaces of the front and back panels between the ribs carried by said panels, respectively, each rib web engaging one of said sheets and all said rib webs being spaced from opposing portions of said panels by said sheets.
2. A light-weight, sound-insulated and cushioned, fabricated metal door comprising flanged front and back sheet metal panels joined together along their edges and defining a hollow shell, support means in the Shell for the panels comprising a plurality of generally channel-shaped ribs welded to the inner side of the front panel and extending toward and having webs disposed adjacent to the rear panel and a plurality of generally channel-shaped ribs welded to the inner side of the back panel and extending toward and having webs disposed adjacent to the front panel, said ribs being arranged in a plurality of pairs spaced apart longitudinally of the door, each pair consisting of a rib connected to the front panel and a rib connected to the rear panel, and sound-insulating and cushioning means in the shell comprising sheets of flexible non-metallic material attached to the inside surfaces of the front and back panels between the ribs carried by said panels, respectively, each rib web engaging one of said sheets and all said rib webs being spaced from opposing portions of said panels by said sheets.
References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,200,639 Moore et al. Oct. l0, 1916 1,439,439 Nyman Dec. 19, 1922 1,441,446 Orruck Jan. 9, 1923 1,686,831 Matchette Oct. 9, 1928 1,810,321 Michelman June 16, 1931 1,846,366 Shattuck Feb. 23, 1932 1,919,419 Dudley July 25, 1933 2,070,219 Tracy Feb. 9, 1937 FOREIGN PATENTS Number Country Date 262,934 Germany July 26, 1913