US1146960A - Fire door or shutter. - Google Patents

Description

F. L. SAINO.

FIRE DOOR 0R SHUTTER.

APPUCATION FILED JAN.25. 1912.

1,146,960. Patented July 20, 1915.

[N VEN T 0R A llmney COLUMBIA FLANOURAPH c0. WASHINGTON. D :7v

tion.

times ares rare FELIX LAwEENc SAINo, 0E MEMPHIS, TENNESSEE, LASSIGNOR. TO SAINO FIRE noon & SHUTTER co, 0E MEMPHIS, TENNESSEE, A co roaArIoN 0E TENNESSEE.

To all whom it may concern: 1

Be it known that I, FELIX L. SAINo, a i at Memphis, in the county; of Shelby and State of Tennessee, have invented certain new and useful Improvements in FireDoors or Shutters, of which the following is a specifica- My invention relates to certainnew useful improvements in fire doors and shutters,and has especial-reference toithat class of sheet metal doors which is fully described and claimed in the prior Patent No.

982,303, January 24, 1911. I

An essential object of the present invention is to improve'the construction of the door or shutter, first,by simplifying the construction in that the stiffening frame of the door comprises fewer'parts; second, by doing away with the rawedge of the front .wall which is shown as lapping the vertical stiffeningframe in the former patent.

-My present invention materially cheapens the cost of the door while at the same time improving its appearance. To accomplish this end I retain most ofthe essential features shown in the formerpatent, but dispense with certain parts which I deem unnecessary in doors'or'shutters for openings of ordinary size.- The slidable stiffening bar, shown as 1e Figure 7 in. the prior patent is not used in myjpresent invention 'as I find'that by interlocking the stiffeningchannels of the frame with the front wall of the door, these stiffeningflchannels are held in sufficiently rigid alinement in doors of ordinary size by thevinterlock. The spacing bar shown as 11 Fig.- 7 of theprior patent may also be dispensed with in doors of orinary size. In the present construction,

.which is hereinafter'fully explained, the

door or shutterismade with-the front wall substantially in a single sheet ofmetal, and

the rear wall is comprised of a'pluralityof overlapping sheets of "metal, and-an interposed layer of refractory material.

The interlocking fiangesor edges of the sheetwhich 'coxistitutethe front wall of the door and the outer edges of the channel Specification of Letters Patent.

Application filed January 25, 1912.

that the, front wall may,

made of corrugated metal, made, the corrugations of the front wall FIRE DOOR OR SHUTTER.

rammed July 2c, 1915.

Serial No. 673,291.

members which form the hollow side sections or stiles of the door extend substantially the full length of the .door, the construction being such that the stile is expansible' in a traight line, and in unison with the body of the door in substantially the manner described in the aforesaid patent.

With the above and other objects in View,

my invention consistsof the parts and the constructions, arrangements and combination of parts, which I will hereinafter describe and claim.

In the accompanying drawing forming part of this specification and in which similar reference characters indicate like parts in the several views; Fig. 1 is a section on the line X-X of Fig. 2, of a portion of the door showing the hollow stile 14: or section at one side thereof, and showing the telescoping connection between the edges of the front wall of the door and the several channel members which form the said stile or section. Fig. 2 is-a rear elevation of a part of the door.

In said drawing the door is shown as consisting fundamentally of the rear wall, 1, of sheet metal, a front wall, 3, of sheet metal, and an intermediate sheet, 2, of some ap-- propriate refractory substance such as asbestos. The construction of these parts may follow more or, less closely the construction 1 and arrangements of the corresponding parts of the former patent, it being understood. if desired, be formed of a single sheet of metal, or two or more sheets may be used, riveted together to form the equivalent of a single sheet. The rear wall is formed of two or more sheets of metal independently fastened to the front wall throughout only a portion of their edges where they abut the stiles. These rear sheets may be connected with each other by loose'rivetsin slotted holes but I prefer to interlock them in such a way'a's to allow one to slide away from the other when the door is under expansion.

' The walls of the door are preferably and when so preferably extend vertically and the corrugations of the rear wall extend horizontally; it will be understood, however, that the corrugations of the several sheets may take some other relative position and that they may extend in any manner which will be found best suited for my purpose.

The front and rear walls of the door may be riveted together by rivets, 8 and 9, at the edges of the walls substantiallyin the same manner as shown in the aforesaid patent.

In doors of ordinary size, howevenl prefer, 'to omit the collars shown on rivets, 8, at the same time dispensing with'the spacing shown at 11. The rivets, 9, serve to secure the vertical or side edges of the front and back walls and the legs of the hollow stiffening channels, 18. These rivets 9 pass through the sections, or independent sheets bled the overlap in these channels coincide with the overlaps in the sheets forming the rear wall of the door. The outer legs of these "channels, 13, after extending to the front of the door, and parallel with the returned portion, 12 of the edge of the front wall, are turned toward therear 'of the door, as at 14 until theystand parallelto the returned or bent portion of the front wall, 12, the bent portions of the channels and the bent portion of the front wall fitting together in tongue and groove fashion. The telescoping parts, 12, of the front wall, and the corresponding part, 14, of each of the channels, 13, are adapted to slide relative to each" other when the door, is exposed to high temperatures, thus providing for eX-- pansion between the edge of the front wall, 14, and the several sections of stiffening channels, 13. p

It will be seen that by reason of the interlock of the channels, or plates, 13, with the edge of the returned portion of the front wall, the bar shown at 14, Fig. 7 in the former patent may be dispensed with as the channels will be held in alinement by theinterlock; and the stile-will be stiffened by four thicknesses of metal at the vertical edges of thedoor. For the samereason the spacing and stiffening bar, 11, and the collars or washers, 10, on rivets, 8, may be dispensed with, thus furthercheapening the cost of the door. Y

hollow stile section which is substantially square in cross section, said front sheet extending across the edge of the door and thence bent'and returned toward the front,

'and said channel member having a terminal portion which is bent toward the rear of the door and foldably interlocked in sliding relation to the returned portion of front sheet whereby the sheet and channel members are exp'ansively connected."

'2. In a firedoor or shutter having a front wall substantially in a single'piece and a rear wall comprised ofaplurality ofoverlapping metal sheets free to slide at their overlaps andjattached' to the front wall independentlyof each other, a vertical stiffening frame composed-of a plurality of'stiffening sectlons, the number of said sections corresponding with the number of sections comprising the rear wall of the door, sald stiffening sections hav ng their outer edges foldably connected 'to'the-vertical edges of said front wall to form 'a slidable interlock which compensates 'for unequal expansion.

3. In a sheet metal door, or shutter, having front and back walls, stiles formed in partby a plurality ofoverlapping stiffening means eachattached to said wallsjindependently of each; other at pointsbetween their overlapping ends, said 'stifienin-g members being held in ali nement by their fasten-" ings to said walls, and an interen'gaging folded tongue and groove connection with the edge portion of the front wall;

4. In a sheet "metal fire door or shutter having front and back walls, a 'plurality of stiffening members attached to the main part of thedooi'f, and a stiffening frame formed in part by the overlapping of the front wall and part by the stifiening members, saldstiifeni'ng members being substantially square in. cross section and having edge 5 portionsf foldably interlocking with'the edge portionof said front wall.

, 5. In a fire door or shntter having a front wallsubstantially in a single piece of metal, 'arear wall composed ofaplurality of overlapping independent metal sheets, and an interposed layer of refractory material, a

stiffening; frame compri'smga plurality of overlapping *stifi'eni'ng members, the number of said memberscorresponding substantially with the number of metal sheets in the rear wallof the r doon said stifien'ing membersbeing held'ai n alinement by rivets, by

their overlapping and telescoping ends, and by foldably connecting the edges of the stiffening members with the edges of the front Wall of the door or shutter, whereby the stiffening frame expands in unison With the door or shutter When the same is exposed to( high temperatures.

6. In a sheet metal fire door or shutter structure, the combination of a stiffening frame comprising a plurality of overlapping stifiening members and independent fas- Gopies 01 this patent may be obtained for five cents each, by addressing the tenings therefor, and a slidable tongue and groove interlock formed by foldably connecting the edges of the members With the edges of the door.

In testimony whereof I affix my signature in presence of two Witnesses.

FELIX LAWRENCE SAINO.

Witnesses:

WM. F. DUNBAR, J. F. WALKER, Jr.

Commissioner of Patents,

Washington, D. G.

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