US1046455A - Metal door and method of manufacturing the same. - Google Patents

Description

G. H. FORSYTH. METAL Doon AND METHOD oF MANUFACTURING THB SAME.

APPLICATION FILED NOV. 30, 1908.

Patented Deo. 10, 1912.

Chicago, in the county GEORGE H. FORSYTH, OF CHICAGO, ILLINOIS.

METAL DOOR AND METHOD OF MANUFACTURING- THE SAME.

Specification of Letters Patent.

Application led November 30, 1908. Serial No. 465,069.

To all whom 'it may concern:

Be it known that I, GEORGE H. FoRsYTH, a citizen of the United States, residing at of Cook and State of Illinois, have invented certain new and useful Improvements in Metal Doors and Methods of Manufacturing the Same, of

which the following is a specification.

This invention relates to doors and like lclosures made of sheet metal parts, and has reference partly to a novel construction of such door or closure, and partly to the novel method of joining and uniting the parts thereof without the use, to any appreciable extent, of rivets, screws or like mechanical fastenings.

The invention will be readily understood when considered in connection with the accompanying drawing, which illustrates a sheet' metal door embodying the invention, and in connection with the following detail description of my novel method of manufacturing the same.

Referring to the drawing,-Figure 1 is any elevational view of a door embodying the invention, one of the side-frame members being shown as partially removed more particularly to illustrate the means for and manner of uniting the side and top bars of the door at the corners. Figs. 2, 3 and 4 are cross-sectional details, enlarged, on the lines 2-2, 3 3, and 4-4, respectively. Fig. 5 is a cross-section, enlarged, through one of the panels, illustrating a modified form of internal panel, reinforcement. Fig. 6 is a perspective detail illustrating a modification of the means for securing the mullion and transom bars to the main panel plates.

The door herein shown is of the multiplepaneled type, comprising in its main constructional make-up vertical side-frame members 10, horizontal top and bottom frame-members 11, mullions and transoms 12 and 13, respectively, and panels 14.

Referring now tothe details of construction, the vertical side rails-10, as likewise the horizontal top and bottom rails 11, of the bounding frame, are made of sheet metal bent longitudinally to present hollow framemembers having 'three plain rectangular sides; while the fourth or inner side, constituted by the meeting marginal rportions of the metal, is so shaped up as to present beveled panel frames and a series of grooves adapted to engage the .margins of the panels. The beveled panel frames of the verandA strong ,(ting parts, "the invention.

tical rails 10 arevindicated by 15, between which are the lgrooves 16 which receivethe vertical margins lof a pair of parallel panelunitedly make up the sevplates 17 which between the grooves 16 eral panels 14, and is a central verse wall of which is formed by the overlapping rect'angularly bent margins of the metal sheet from which the rail is made, said groove 18 receiving the margin of a central panel-reinforcing or filling plate 19. In the case of the top and bottom horizontal rails 11, the beveled panel frames are designated by 20, the panel-receiving grooves by 21, and the central receiving groove of the panel reinforcement by 22.V The vertical and horizontal rails 10 and 11 are united by L-shaped cor'ner connectors herein shown as rectangular hollow sheet metal members 23 which .have formed on their inner edges a pair of fins 24 which fit reversely disposed channels such as 25 that lie between the channels 21 and 22 of the horizontal rails and the corresponding channels 16 and 18 of the vertical rails.

above stated, the horizontal and vertical rails 10 and 11 constitute a bounding frame for a pair of parallel panel-plates 17, between which is the filling and reinforcing 19, which is corrugated in various ways to form a light and strong reinforcement between and engaging both of the plates 17 As shown inFigs. 1, 2 and 3, the reinforcing plate 19 is 4formed with staggered rows of alternate oppositely disposed lateral projections 26 and 27 pressed therefrom, the outer faces of said projections engaging the plates 17 and forming a light and strong stiflening and lling for the latter. In Fig. 5 I have shown a reinforcement comprising a pair of plates 28 and 29 lying face to face and having outwardly pressed projections 30 and v31, respectively, similarly engaging the pane -plates 17. It is obvious that numerous other specific forms of light skeleton reinforcement might be employed.

For doors and other closures of *relatively small dimensionshavnga single plain panel, the construction as thus far described is complete, 'except as to the permanent union of thel assembled parts.

I will now describe a simple, inexpensive,

method of uniting the interit- The parts before being aS- groove` 18, the inner or trans- Patented Dee. io, 1912. I

which constitutes one feature of l sembled are dipped in a metallic coating material of a cementit-ious nature, consisting of melted tin, or, preferably, a solderlike mixture of melted tin and lead. rlfhis 5 forms a protective coating, affording an attractive external appearance, as well as protecting the metal, where of oXidizable material, against rust; and, when the parts have been assembled by sliding them together, as indicated in Fig. 1 Where one of the vertical frame-bars is sho-wn partially removed, the entire structure is subjected to the influence of heat, as by placing the same in a suitable oven, suiiclent to soften the coating. This causes the coating on the overlapping parts to coalesce, thus strongly adhering the latter and 'ving to the structure a strength and rigidity fully equal to that secured by the employment o-f rivets, screws and like mechanical fastenings. This can be done without injury to the appearance of the coating on the exposed parts if theA exlposure to the heat be nottoo great or undu y rolonged.' In the event however, that t e coating on the exposed' parts should be injured by undue exposure to the heat, this can easily be remedied by a simple redipping of the frame in the original coating material.

Where itis desired to give the structure a multiple panel effect, as shown in Fig. 1, through the use of mullions and transoms, I preferably form and applyA these latter as follows: Secured to the outer faces of the main panel-plates 14 as by rivets 32 (Fig. '2), and disposed in the horizontal and vertical planes of the transoms and mullions are securing strips 33 which have intermediate outwardly bent portions adapted to engage and reinforce the transom and mullion strips, and outwardly offset marginal portions 34 which, with the panelplates 14, constitute slideways for the reentrant marginal portions 35 of the transom and mullion strips 13 and 12. The transom-securing strips extend entirely across the panel-plates, while the mullionsecuring strips are interrupted at the crossings of the transom strips. The transom and mullion strips themselves have flat outer faces that are flush with each other, and oblique portions 36 between the flat faces and the rentrant margins 35, said obli ue portions constituting 1n part the beve ed rames of the individual panels 14. At their ends the face portions of the transom and mullion strips are offset inwardly, forming oblique sections 37 adapted to engage and overlie the beveled frame sections of the individual panels, and the inner ends of said oblique sections 37 are provided with tongues 38 which project inwardly of the frame rails and transoms through suitable slots formed in the beveled Walls thereof. The necessities of assembling permit the use of these tongues on all except the intermediate section of the mullion strips, the tongues being omitted from the latter in order to permit of the application of the transom strips in the manner hereinafter described.

Fig. 6 shows a modification of the securing means o-f the mullion and transom strips which consists in cutting and offsetting from the faces of the panels 17 integral tongues 39 which are engaged by the lips 35 and end tongues 38 of the transom and mullion strips in the same Way as indicated in Fig. 2.

The interitting parts of the structure as above described are so formed that, in assembling, the parts are capable of being slid longitudinally, one over and into the other, until the complete structure has been assembled. For instance, the main panel-plates 17, with their interior reinforcement, having been temporarily secured together, the intermediate sections of the mullion st-rips are first applied by sliding them longitudinally over the securing strips 33. The transverse transom 'strips are then similarly applied by sliding them over the horizontal securing strips. The end sections of the mullionstrips are then applied in the same manner; the end rails 11l are then applied; and, finally, the side rails 10 carrying the L- shaped connectors fitted therein, are then applied in the manner indicated at the leftl in Fig. 1. As the parts are desi ned to fit with considerable snugness, the riction of the engaging members -is suiicient to hold the complete structure together until the parts are permanently united, which is done by first immersing the parts separat-ely in a solution of metallic cementitious material, as alread described, and then subjecting the assem led structure to the action of heat sufficient to soften the cementitious coating and thoroughly adhere the overlapping and interlocking parts.

While I have described the invention as embodied in a door or like closure, yet it will be evident that the principle and constructional features disclosed are capable of embodiment to advantage in partitions and other wall structures wherever a comparatively light, strong metal paneled structure is desired.

I claim:

1. A metal panel structure of the characplates, and transom and marginal portions of said panel-plate, a securing strip on the face of said panel-plate, and a division strip slidably engaging and held by the outturned edges of said securing strip, said division strip having tongued ends tted into saidrame, and said securing strip having a projection engaging the central portion of said division strip.

3. A sheet met-al door structure, comprising a pair of parallel panel-plates, an intermediate reinforing plate having laterally offset projections engaging the inner surfaces of said panel-plates, a hollow metal frame having a grooved inner edge adapted to receive the manginal portions of said panel-plates and reinforcing plate, securing strips on the outer faces of said panelmullion strips having sliding engagement on their opposite edges with corresponding edges of said securing strips and tongued ends fitted into said hollow frame, said securing strips having projections engaging the central portio-ns of said mullion strips. 4. In a metal door structure, the combination of marginal frame members, a panel held by said marginal members, a securing member attached to said panel and having outwardly bent edges and an elevated central portion, and a division member having sliding engagement with the outwardly bent edges of said securing member and supported by the elevated central portion of said securing member.

GEORGE H. FORSYTH.

Witnesses: v

SAMUEL N.r POND, AILEN W. Moons.

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