US1163914A - Fireproof door. - Google Patents

Description

v FIREPROOE DOOR. APPLICATION FILED JAN.29. 1914.

Patent-ed Dec. 14, 1915.

n me games Parana c arion FRED W. HARGRAVE, OF SOUTH RIVER, AND JAMES A:

WHEELER, or SOMERSET COUNTY, NEW JERSEY, ASSIGNORS T0 WILLIAM T. ELKTNTON, 0F PHILADEIb PHIA,PENNSYLVA1\TIA.

'rrzanrnoor noon.

To all whom it may concern:

Be it known that We', FnnD W.IH.-XRGRAVE, a resident ofSouth River, in the county of Middlesex and State of New Jersey, and JAMES Al WHEELER, a resident of the county of Somerset/in the State of New Jersey, both citizens-of the United States, have invented certain new and useful Improvements in Fireproof Doors, of which the fol lowing is a'specification.

This invention relates to fireproof doors ofthat class which are constructed of an artificial fireproof lumber or composition and 'm'etalli-c elements, and it has for-its object to provide a sim'pleand improved fireproof doorof this character which will possess adthe composition which vantages in point of-lightness and strength, resistance to strains, effectiveness and general efficiency, and which will furthermore be simple and inexpensive in construction and can be manufactured with facility and economy. I

In the drawings Figure 1 is a face view of the door embodying our improvements, partly broken away to show the interior construction. -Fig. 2 is a detail vertical crosssection, on an enlargedSc'ale, taken on the line w-w, Fig. 1; Fig. 3 is a detail hori- 'zontal-cross-section, on an enlarged scale,

taken on the line .Z/-Q/, Fig. 1. r Corresponding partsinall the figures are Our invention'comprises in its main characteristics an exterior metallic casing or sheathing which incloses an internal body structure formed of an artificial fireproof lumber or composition. The elements of the main body portion constituted by said internal structure. within-the outer sheathing are formed of'a rigid non-metallic composition of low heat conductivity and undeformable by heat, and the artificial fireproof lumber or composition may be of any suitable material, but we prefer to use for this purpose is commerciallyknown as alignum and which is constituted by a suitable .fillerincluding asbestos and combined with a fireproof binder to produce a plastic substance which is molded info Shape nd compressed and dried in a rigid structure.-- 1 I specificationof Letters Patent. Paibgmpedl Dqgqg, 1141, 15915 Application filed January 29, 1914. Serial No. 815,141. i

Referring to the drawings, l designates the exterior casing or sheathing, which forms the surface of the door and extends over the area of the same at the sides and edges thereof. This metallic casing'or surfacing is, in practical manufacture, consti tuted by two corresponding halfparts or sections, 2%2, each of which halves comprises athin metallic plate or sheet, 3, bent into proper angular contour in cross-section and forming the face of the door and half of the edge portion thereof. The metallic casing or sheathing plates 3 thus respectively fOIl'flChfiIlIlGlS or molds within which are held the non-metallic andfireproof composition elements which constitute the internal' body structure of the door.

The improved construction and arrange ment, as comprised in our present invention and improvements, enables the molding, in practical and economical manufacture, of the internal body composition structure within the mold formed by the metallic sheathing 'plates 3 of the half-sections ofthe exterior casing 1. Thus, in manufacture, the half-section molds or channels constituted by the metallic sheathing plates 3 are placed and braced in a suitable press, and the composition forming, the-internal body structure is molded therein in a plastic state, with the employment of suitable cores to' produce the desired molded'contour, and

is compressed and dried in a rigid structure.

To facilitate theretention of the internal composition,- during the and after it is compressed and dried in positiornthe edges'of the plate 3 which are positioned at the edge portion of the door, as at 4, are turned inwardly at an angle to form a projecting retaining flange, as at 5.

The internal body composition has, in its preferred molded "form, a relatively-thin base portion, 6, extending againstand over the area of the face portion of the sheathing plate 3 whichforms the side surface of the door, and thickened edge portions, as at 7, forming continuous blocks or bars extending around the edge portion of the sheathing plate 3 which extends at the-edge molding operation.

edge block or bar portions of the door and extend substantially throughout the entire interior body area thereof, for purposes of lightness and economy.

- The two half-sections 22 of the casing structure 1 have their innersurfaces, which are constituted by the faces of the thickened- 7 of the internal composition body Structure, abutted and se- "cured together, adhesively'or otherwise, as

at S), to produce the complete door structure, after the respective half-sections 2-2 have been constructed or produced as above described.

In the internal open area or space 8, brac-' ing means are preferably provided between the side portions of the door. structure, and the preferred construction for this purpose comprises bars or blocks, as at 10, extending continuously between the top and bottom of the door and in parallel position at suitable intervals. These bracing bars or blocks are thus, in the half-sectional construction as herein shown, constituted by two half-sections 11-.-11, respectively carried by the half-sections 22 of" the casing structure and having their inner faces abutted and secured together, adliesively or otherwise, as

In the practicalmanufacture, in which the internal composition body structure (3--7 is molded'within the sheathing plate3 of the half-sections 2 of the exterior casing 1, the half-sections 11 of the continuous bracing blocks or'bars 10, are likewise molded in position within the half-sectionsQ of,

r the casing structure, in a plastic state, with the employment of suitable cores to produce the desired molded contour, and are compressed and dried in a rigid structure. The half-sections of the continuous internal bracing bars or blocks thus have their base upon the 'relatively tliin base portion 6 of.

the internal composition body structure and project therefrom and extend between the thickened edge portions 7 thereof at the top and bottom of the door, and divide the in ternal open hollow area 8 into a plurality ofopen spaces. Said internal bracing bars "or blocks are likewise ofthenon-metallic fireproof composition corresponding to the composition of the internal body structure,

and under some conditions of manufacture they may be molded or formed separately from the internal composition body structure and secured in connection therewith and in proper positionadhesively or in any other suitable manner. Our improved door structure is also preferably provided internally with blocks, as at 14:, likewise formed of j the non-metallic fireproof composition as hereinreferred to, and located Within the internal area orspace' 8 at suitable points, which blocks means for the u tt in the attachment of the rovide strong and effective hinges, locks, or other supplementary devices of the door. Said blocks .14 are adliesively or otherwise secured in position against the thickened edge-portions 7 and betweenthe base portions 6' of the internal composition body structure.

It will be understood that all the various parts of the. door structure, as hereinbefore described, may be secured in connection adhesivelyor by the employment of screws or bolts at any desired point, as the rigid nonmetallic fireproof composition herein. constituting the main body structure can be worked or will receive nails or screws in the same manner as ordinary lumber. .The outer faees of the casing-1 are suitably finished, in imitation of grained wood or as otherwise desired, and may be orna -1nented to impart "any desired effector-characteristics to the door surface. For instance,ornamental molding strips may be 'securedupon. said faces, to produce panel Y effects or other ornamental irregularities of the surface. It will be. also understood that the door structure maybe made up of a plui-ality of sections constructed-and embody ing the general features as hereinbefore demain structure is constituted by-the rigid non-metallic composition of low heat conductivity and undeformable by heat, and is therefore resistant to the action ofextreme heat to maintain the normal conditions'of the door structure and preclude the breaking down of the same under the action of heat. In this connection, theofiice of the thin "metallic surfacing or sheathing which forms the exterior sur facefofthe door is to preclude impairment of the finished surface by dents'or other COIIdItLOIIS of usage or Wear,

and also to serve as a niold in which the non-- metallic fireproof composition constituting the internal body structure can be molded. in plastic conditioninto its structural shape and compressed and dried ina rigidstruo ture, thus facilitating lightness and economy in manufacture. Under the action of eX- ti'eme heat, the exterior metallic casing or sheathing is effectively protected against deformation inasmuch as it is sustained-at all points by the inclosed composition body structure which conforms to the same and which is non-metallic and of low heat conductivity and undeform'able by heat.

The improved construction,- as comprised in our invention, provides a very simp'le and light door structure which is thoroughly braced against any strains or conditions of use, which can'be easily and'economically manufactured, and whichwill possess in characteristics and strength.

We do not desire to be understood as Y limiting ourselves to the detail construction and arrangement of parts as hereinshown and described, as it is manifest that variations and modifications therein may be re sorted to, in the adaptation of our invention to varying conditionsof use, without departingfrom the spirit and scope of our inven-- tion and improvements, Ye therefore remodifications as properly fall vithin the scope of our invention and the terms of the following claims. r

Having thus described ourinvention, we claim and desire to secure by Letters Patent:

1. An improved fireproof door, comprising an exterior casing or sheathing constituted by corresponding half-sections each consisting of a metallic plate forming the surface of the doorand extending over the side and edge portion thereof and an internal body structure inclosed Within saldsections of the metallic casing and formed of a rigid non-metallic composition of low heat conductivity and undeformable by heat, said half-sections being secured together with their inner faces abutting and said internal composition body structure being in its main area of less thickness than the halfsection of the door and formingan interior ,open area or space between the portions of the metallic sheathing which extend over the sides of the door. 1

2. An improved fireproof door, comprising an exterior casing or sheathing constituted by corresponding half-sections each consisting of a metallic plate forming the surface of the door at the-side and edge portion thereof and an internal body structurev inclosed Within said sections of the metallic casing and formed of a rigid non-metallic composition of low heat conductivity and undeformable by heat, said internal composition body-portion of the half sections of the exterior metallic casing having a base portion extending against the side face of the sheathing plate and thickened edge portions forming continuous blocks or bars ex tending around the 4 edge portion of the sheathing plate, and the half-sections of said casing being'secured'together With the faces of said thickened edge portions abutting, whereby an interior open area or space is formed.

3., An improvedfireproof door, comprising an exterior casing or sheathing constituted by correspondinghalf-sections each consisting of a metallic plate forming the surface of the door at theiside and edge por' tion thereof and an internal body structure inclosed Within said sections of the metallic casing and formed of a rigid non-metallic composition of low heat conductivity and undeformable heat, said internal composition body having an interior open area or space and said half-sections being secured together with their inner faces abutting, and

.tivity and undeformable by heat. serve the right to all such variations and 4. An improved-fireproof door, compristuted by corresponding half-sections eachconsisting of a metallic plate forming the surface of the door at the side and edge portion thereof and an internal body structure inclosed within said sections of the metallic casing and formed of a rigid nonmetallic composition of low heat conductivity and undeformable by heat, said internal composition body portion of thehalf sections of the exterior metallic casing hav-- ing a base portion extending against the side face of the sheathing plate and thickened edge portions forming continuous blocks or bars extending around the edge portion of the sheathing plate, and the half-sections of said casing being secured together with the faces of said thickened edge portions abutting, whereby an interior open area or spaceis formed, and bracing bars or blocks extending within said interior open area or space of the. half-sections of the casing and between the thickened edge portions of said internal composition body and having their inner faces abutted, said bars or blocks being formed of a rigid non-metallic composition of low-heat conductivity and undeformable by heat. I

5. An improved fireproof door, compris ing an exterior casing or sheathing forming the surface of the door at the side and edge portion thereof, said casing being constituted by corresponding half-sections each consisting of a metallic plate forming a mold Within Which a nonemetallic composition of low heat conductivity is molded into shape and compressed and dried in a' rigid structure undeformable by heat, said composition forming an internal body structure inclosed within the half-sections of said metallic casing and being in its main area of less thickness than thehalf-sections of the door and said half-sections being secured together With their inner faces abutting.

6. An improved fireproof door, compris- I ing tvvo corresponding half-sections each having an internal body structure formed of a rigid nonmetallic compositionof 10W heat conductivlty and undeformable by heat and an exterior metallic casing Which carries and incloses said body composition and forms the external sheathing or surface of the structure, said external sheathing being ,eo11stituted by a casing mold within which names inthe presence of the subscribing Witsa 1d lnternal composition body mass is comnesses.

pressed and molded 'into shape and dried in FRED W; HARGRAVE. a rigid structure, the corresponding half- JAMES A. WHEELER. 5 sections being secured together with their Witnesses:

inner surfaces abutting; J 0s. REED LITTELL,

In testimony whereof We have signed our GEORGE N. SAGE.

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