US981247A - Fireproofing for safes and vault doors. - Google Patents

Description

3 I J. E. DAVIS.

FIBEPROOPING FOR SAPES AND VAULT DOORS. APPLICATION rnn'n 210v. 4, 1909.

r 981,247, A v Patented Jan. 10, 1911.

W II 'M E had to the and JOHN E. DAVIS, 0F PORTLAND, OREGON,

PANY,-OF PORTLAND, OREGON,

ASSIG-NOR TO, DAVIS A GORPORATION ,OE

SAFE & LOCK colit- OREGON. 4

rmnrnoorrne son sA FEs AND vAU-LrnooRsf- To all whoma't may concern:

c it known that I, JOHN E. DAVIS, a citizen of the United States, and a resident of Portland, in the county ofMultnomah and State of Oregon, have invented a new and useful Improvement in Fireproofing for Safes and Vault-Doors, of which the following is a specification, reference being accompanying drawings as constituting a part thereof.

y invention has for its object to obtain a fire-proof safe, the fire-proofing'of which is so made as not to have its etheiency destroyed by a fall of thesafe with the collapsing'of a burning building, exposed to extreme temperatures; in short to provide a fireproof filling for safes which shall retain its effectiveness as long as the frame of the safe holds together.

My invention is also applied doors, as apparent from the following description.

In the drawings: Figure 1 shows a front elevation of a safe with the door thereof open, parts being in section; Fig. 2 is a top view of my safe with the door opened a part-of the body of the safe being shown in horizontal section; vertical section of a corner of the safe body, illustrating a difierent mode of'arrangement and construction of my fireproof filling; and Fig. 4- is a partial vertical section of a door illustrating another mode in which my invention may be carriedsout.

In the construction of fireproof safes, hydraulic cement was generally used as the fire-proofing material, but such filling, when exposed to intense heat, generates steam, which was formerly deemed a desirable property of the cement, but now is not so considered because the steam affects the mechanical structure of the books contained in the safes,-and frequently renders the books useless or renders them illegible. The steam emitted from such fire-proof filling 1s also known to melt soft solder, and to so f badly tarnish jewelry as to render it practically unfit for further use. A hydraulic cement filling is also affected by climatic conditions which may cause expansion, to allow for which thedoor of the safe containing such filling cannot be fitted closely"; but this, on the other hand, allows heat and water to enter around the edges ofthe door, when the safe is exposed in a fire. The

Specification of Letters Patent. Application filed November 4, 1909.

nor by being i c 'of the Fig. 3 is, a.

serial No. 526278.

I filling *invented by me to make the door practically absolutely :.t1ght, for my fireproof filling isnot in any I wise affected by climatic conditions orheat. eferring now to the details of'construction of my fire-proof filling ing, either of the dense or the porous. kind, embedded in amineral material capable of resisting high temperatures. I presilicate, or infusorial earth, which is a nonconductor of, and indestructible by, heat. The terra cotta tiling is selected from one of the kinds referred to, both being commonly used for building purposes, anc senting a foursided shell -like structure having a central cavity tiling, as shown in the drawlng, occupies the l l l. l l l l l i i and outer walls 0; 0 of the shell and frame of thesafe,

door.

The inner faces of the metal shell; 0, body of the safe may be lined by a I monolithic facing of cement mentioning cement, I mean ment, commonly used in the building art, being introduced in' a plastic state and set or i hardenedinto a stone-like mass, asfusual.

It is enerally convenient to arrangethe' f) and separate such of'the embed tiling end to end (f, ends by an intermediate layer ding material 9, which in Fig. l'is represented asbeing diatomaceous silicate. The I air confined in a hollow space of the terra 1 cotta tiling would, as well known, act as a heat-retarder, but I prefer to fill such hollow space with the diatomaceous silicate, as shown by ie. The difierent kinds of material referred to arechosen and arranged by me, as described, to promote the fire-rcsisting property of the filling of my safe.

When the filling has been constructed as just above described, the following beneficial results are obtained: The tiling, b

reason of being embedded in, and filled with,

I the pulverized silicate, though it be fractured or shattered by the fall of the safe with the collapsing of the floor on which it I stands, it will, nevertheless, be maintained in an effective state, for the crevices caused by the fractures will become filled and closed up by the pulverized mineral material within the hollow of and surrounding the tiling.

me however i ermitsas illustrated in- F1g. 1: a represents hollow terra cotta til,

:ter to use for such purpose diatomaceous l central part of the space between the inner and is likewise arranged in the:

o, b; When hydraulic oe Patented senate, 191a. a

wine 1' or'air space. This: j

eral material, at, g, are omitted, and in place cement incasin gthe hollow tiling j; but a The construction and arrangement of the i filling for the door of the safe is substani tially the same as that of the body.

In the illustration of my improvement in Fig. 3, the following differences are to be noted: The described interior cement fac- I ing, 1), b, and embedding pulverized mini thereof the spaces between the shell of the safe body, and the outer faces of the tiling, also the spaces between the ends of the tiling, are filled with a solid or monolithic form of cement. The filling, e, of pulverized mineral material, within the hollow of the tiling, 0;, is retained, I y The mode of construction of my filling i illustrated in Fig. at is substantially the same 1 as that illustrated in Fig." 3; h representing the shell of a door, 2' a monolithic mass of filling for the hollow la of the tiling is i omitted, and the cement wall, 1', is depended upon for holding the tiling in place, at the 3 time the safe is subjected to a fall". The dis advantage of a more or less monolithic liling is, that in case the fall of the safe should be so great as to shatter the cement wall portion, 2', of the filling, it might leave a space in the fracture of the filling, between the walls of the shell 11, through which the intense heat could penetrate, and thus the fire-resistin r quality of the filling would be deteriorated As a general rule, I would state that the .construction'o'f my filling illustrated in Figs. 1 and 2 represent the best mode. liesides the advantages men ioned, it also materially reduces the weight of the filling,

and this, manifestly, is an item, because it sisting of a shell, hollow terra cotta tiling arranged centrally within the shell of the body, embedded in pulverized mineral material, and a filling of mineral material in the hollow of the tiling.

Q. A fire proofing comprising a body con-, sisting of a shell, hollow terra cotta tiling arranged centrally within the shell of the body, embedded in pulverized mineral material, and a filling of diatomaceous silicate in the hollow of the tilin A fire-proofing comprising a body consisting oi; a shell, an inner racing thereon of 1 monolithic cement, hollow tcrra colta tiling arranged centrally within the shell of the body,-einbe .lded in pul'verizcd n'iifneral material, said tiling be ng arranged end to end spaced apart, and the intermediate space also filled with mineral material, and a, filling of pulverized mineral material in the hollow of the tiling.

4. A lire-proofing comprising a body consisling 'if a shell, an inner facing thereon of monolithic ccincnt, hollow terra cotta tiling arranged cenlrall within the shell of the 1 body, en'ibedded. in mineral material, said tiling being arranged end to end spaced apart, and the intermediate space also filled with mineral material, and a filling of diatomaccous silicate in the hollow of the tiling.

Witnesses {Audi R. DL'NIWAY.

CECIL Lone.

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