US2387172A - Insulated record container - Google Patents

Description

Oct. 16, 1945. E. H. MOSLER ETAL INSULATED RECORD CONTAINER Original Filed Jan. 5, 1940 2 Sheets-Sheet l I INVENTORS EDWIN H. MOSLER 7 BY HARRY H. LYNN Patented Oct. 16, 1945 UNITED STATES PATENT OFFICE INSULATED RECORD CONTAINER Edwin H. Mosler, New York, N. Y., and Harry H. Lynn, Wyoming, Ohio, assignors to The Mosler Safe Company, Hamilton, Ohio, a corporation of New York 11 Claims.

This application is a division of our pending application entitled Insulated record container, bearing Serial Number 312,578 and filing date of January 5, 1940 and issuedMay 2, 1944 as Patent No. 2,347,705.

This invention relates to an insulated record cabinet or container or safe which is adapted to Withstand high temperatures, crushing forces, and other destructive actions incidental to accidental fire and like disasters.

An object of the invention is to provide a cabinet of the kind mentioned above, which includes structural advances that render the cabinet highly protective of its contents, under conditions which would ordinarily melt, distort, mangle or explode other cabinets of thesame general type.

Another object is to avoid having to laboriously manipulate heavy insulated drawers, in a record cabinet designed for the protection of its contents 'from fire or intense heat.

Another object of the invention is to provide an improved closure for insulated record cabinets, which is highly resistant to entry of di rected water, heat, flame, dirt and dust, and

which is further characterized by an outstanding ability to prevent explosion of the cabinet in the presence of extremely high temperatures.

Another object is to provide a cabinet and closure arrangement that will withstand the crushing effect of dropping the cabinet bodily, when closed, through a distance approximating thirty feet, as sometimes occurs in the collapse of a fired building or its flooring.

A further object of the invention is to provide an improved bolt-work for safes and cabinets, and like depositories.

An object also, is the accomplishment of the above objects and advantages inexpensively, and with the greatest possible degree of eificiency.

The foregoing and other objects are attained.

the door 1 thereof in the normal open, yet concealed, position at one side of the cabinet.

Fig. 2 is a cross-sectional'view taken horizontally through the cabinet of Fig. 1, but with the door in the closed and bolted condition.

Fig. 3 is an enlarged fragmental cross-sectional view taken through the cabinet door, on line 3-3 of Fig. 4, the insulating material being removed.

' Fig. 4 is a rear elevational view of the improved door and bolt-work embodying the present invention.

The cabinet of this invention is so constructed as to perform the services of an ordinary record filing cabinet having sliding drawers disposed vertically, but embodying also a reinforced and insulated construction in furtherance of the objects stated above. This improved construction embodies also a disappearing door I, which may enter an auxiliary vertical compartment 8 at one side of the cabinet,'when opened. The disappearing feature of the door will not receive detailed treatment in this description, since it is possible to accomplish that invarious ways, an example of which is disclosed in the prior art patent of Abbott et al. No. 1,873,247, granted Aug. 23, 1932. Unlike the device of the patent ust mentioned, the device of the present invention is devoted more to the problem of preserving the contents thereof, than to that of resisting burglary or forced entry to the contents. Accordingly, various structural difference will necessarily prevail, for distinguishing the devices one from the other. 1

Referring to sheet I of the accompanying drawings, 9 indicates the top, H) the bottom, and II and I2, the side walls, of an outer shell constituting the cabinet exterior. The cabinet may be placed upon a base l3, if desired. The top and bottom walls preferably are extended as at M and 15, to one side of the cabinet, where they are joined by an exterior wall Hi to form the auxiliary compartment 8 thathouses the disappearing door 1 when the door is open, as illustrated in Fig. 1.

Within the auxiliary compartment, there may be provided one or more horizontal tracks I'l adapted to support a wheeled carriage I8 that carries the hinge leaves I9 of the door I. An extension 20 of the door, which substantially closes the front. of the auxiliary compartment normally, carriesthe other hinge leaf 2|, the leaves being joined pivotally by means of a hinge pin 22, as will be understood. Upon opening the door of the cabinet, the door may be positioned in substantial parallelism with the carriage [8, so that the carriage may be rolled rearwardly upon the track I! carrying with it the door I so that the door will be housed substantially within the auxiliary compartment 8 in substantial parallelism with the walls I2 and 16 of the cabinet. The characters 23 indicate rollers on car- 'riage l8, tofacilitate shifting of the carriage as stated. A corner reinforcement 24 may be pro- 5 vided for the auxiliary compartment, at both the front and the rear thereof, if necessary or desirable. As previously stated herein, the details of the carriage are relatively immaterial to the present invention, wherefore a detailed descriptionis deeiii'ed unnecessary, h

The cabinet proper is lined with an inner shell which is substantially smaller than the outer shell, so that suitable insulating material ZS may i so as to resist possible crushing and serious any tortion in the event that the cabinet be dropped a, substantial distance, such as might occur the event that a floorcollapses or becomes weal;- ened by reason of destruction oi other parts of a build .T e,.. e n r9p n cons 9 viding a e e 1 sh etmefil e l '1 Perti- -tions 30, each extending fro'rn' thei rear wall of the cabinet; inner shell a location near the front of the cabinet. The iorward edge 3! of eachshelf'preferably is reinforced by turning it .at'right angles to, thebody 9f the shel f, thereby providing, flanges such as it. The shelves are securely fixed along their side and rear edges to the inner shell of the cabinet, preferably by meansoi Welding, so that theinner shellwith .itsshelves orgpartitions, constitutes an integral rigid unit. The characters 6"of Fig. 2 indicate .fusible plugs in the door and outer'walls for the releaseflof gases generated along such Walls when subjected. to high 'temperatures. 7

In constructing the cabinet interior, it is found desirable to terminate the forward edges 33, of the inner shell side, top and lbottomwalls to a location remote from the'ifront of the cabinet, and to furnish side, to -and bottom door jamb inserts, indicated at 3d, to complete t-he'forward portion of the innershell. These inserts prefe'rably overlap the inner shell walls :as at 35; and are spot welded thereto at spaced intervals thereby establishing the desired rigidity. Since the welds are at spaced intervals, the shell walls and the inserts will not be in intimate contact except at a few points, wherefore there is establishedat the overlap a heat conductivity break 'or interruption between the exterior and the interior of the cabinet, for protecting the contents.

At this point in the description, attention may be directed to the fact that the various compartments formed between the shelves 36 and the top and bottom walls of the inner shell, are gdaptedt receive filing drawersor other conclosures in the interest of clarity, and for the It will be noted that the lamb inserts are flared outwardly at and-then projectedinwardly as at '35, to furnish 'bolt keeper recesses or channels 31 for accommodating the door bolts. The channels or recesses are continuous about the entry port or doorway of the cabinet. For- "wardly of the channel or recess 'of each -jamb insert, the metal is projected ona slight angle "to provide the sloping or t'aperedJamb face '38 which accommodates't'he complementary jamb 'face 39 of thedoor I. edge 'of fa'cetfi, the insert'is turned -upon itself as at to enter a'channglfil of the 'out'ershell. Within the channel '41, which extends circum- "ferentiallyo'f the doorway, the flange All of the lamb insert "is welded at intervals 'to the metal:

of the lamb, thereby further establishing the desirable rigid and integral nature of the cabinet parts while 'at -the "same time providing for "the relief of any'gases generated within the fill- At the extreme forward iiig material '25 under high temperature condii preferably is 'an' integral part.

bottom, and one side edge thereof, the door may .further reason that the cabinet need not necessarily be 7 provided with such fixtures.

- furtheranceof some of the objects of this invention, the door of the cabinet is of special design, and comprises a rather substantial front plate or panel-4 2 of which the side extension 20 Along the top,

be flanged as at 43, these flanges being adapted for reception in the continuous channel 41 which bounds or defines the doorway of the cabinet.-

Another flange '44' forthes'arne purpcse, may be provided on a separate upright plateffi'fi which is welded or otherwise' ermanntly fixed to the inner face of panel 42, the separate plate being used also as a reinforcement where the hinge leaf 2] is fixed t0 the" door. Plate may be flanged also at 56', to strengthen the door structure and to also act as a stop lilniti'ng' the lhO-Vfiifitof the door about this hinge connection to the carriage I8: I

As clearly illustrated in Fig. 2, asuitable recss 4'! may be provided in th'fr'oiit plate of the door, for the reception of a manipulating means for the bolts of the-door, which manipulating means is in 'thepre'sent embodiment constituted of a handle 48 pivoted as at 4'9 upon a crosspiece 58 of the bolt actuating shaft or spindle 5|. The purpose of providing the recess, and of pivotally mounting "the handle at 49', is to enable the handle to be displaced to'a position flush with the front of the door when the handle is not in use, thereby to eliminate possible interference with disposing the door to the inoperative and substantially concealed position illustrated in The character-32 indicates any acceptable. type of lockior' the boltwork. Withinthe limits of the space defined by. flange 44, and the upper, lower, and edge flanges 43, the inner face of the door front or plate '42; supports thesecur-ing flanges 52 of the-metallic strips 53 that furnish the door. lamb area's'f3'9. These strips extend along the top, bottom, and side edges of thedoor proper, within the limits 'established by the fourfflanges indicated at 43 and 4d, and may be formed either separate horizontal and vertical sections, or -integral ly as a single strip. Fixation of the-strips through the agency of their respective flanges fi l, to the inner face of the door panel 42, may'bc by way of welding or otherwise, as desired.

.to be :packed with insulating material 56 of any acceptable kind. e Thefianges function also as the primary; supporting means for the bolt-work with which the door is-equipped, In-the form of the invention illustrated, thetwo upright =fianges 54 of the door arespannedat intervals bya series of substantial plate-like struts indicated=by the Icharacters" 51, -58,--and; --5 9, the opposite ends of which struts are welded or otherwise permanently attached to the said upright flanges 54. In addition to supporting the bolt-work and reinforcing the door structure, the plate-like struts serve also to hold the insulating material 56 in position within the internal structure of the door.

The inner finish panel or sheet 60 may aid also the functions mentioned, in addition to imparting a finished appearance to the inside of the door. This element 60 has been removed from the Fig. 4 illustration and is shown by means of broken lines in Fig. 3, in order to most clearly expose the bolt-work and the back of the door.

The door bolts herein disclosed are not of the customary variety, but are formed from elongated steel plates following somewhat the teaching disclosed in the patent of W. Corliss No. 447,488, dated March 3, 1891. In a very general waythe Corliss'patent discloses the type of bolt plates employed herein. The bolt plates herein are identified by the reference characters 6| and 62 for the vertical bolt plates, and by the characters 63 and 64 for the horizontal plates. The several bolt plates are arranged for sliding movement to extended and retracted positions, all of them moving outwardly or inwardly in unison shifters 84 and 85.; By this means, the vertical shifting of T-link 18 results in rotational movement of the secondary shifters about their respective pivots 86. At the locations 81 and 88 of each of said secondary shifters, a connection similar to 8|83 is provided, for shifting longitudinally ciprocating the pairs of links 9494 and 9595.

when the primary link shifter 65 is rotated by means of the handle 48 located exteriorly of the door. The opposite .ends of each bolt plate are mitered, as indicated generally at B, preferably at an angle approximating 45. When the bolt plates are fully retracted, as illustrated in Fig. 4, the mitered ends thereof abut, or preferably so.

The three door bolts indicated at BI, 62, and 63 may be mounted for shiftability relative to the inturned flanges 54 of the strips 53 in any acceptable manner, such as by providing them with elongated slots 61 through which extend the studs 68 which are anchored to the several flanges 54. Such studs are most clearly illustrated in Fig. 3, and are seen to include a thread end 69, the threads of which engage the internally threaded bore 10 of a reinforcing metallic bar H which backs the circumferential flange assembly 54. In other words, reinforcing bars such as H function as thread nuts into which the screw thread ends of the various bolt plate mounting studs may engage, for anchoring the studs to the door. The characters 12 and 13 indicate, respectively, a spacing washer and a screw adapted for mounting the finish panel or sheet 60 upon the rear of the door. As shown in Fig. 3, the screw 73 may enter a central threaded bore 14 of the mounting stud 68. All of the mounting studs may be utilized in this manner to support the finish panel, if desired.

Attention is now directed to the means shown in Fig. 4 for shifting the bolt plates upon rotation of the handle 48 and its spindle 5|. The primary link shifter 65 conveniently may be formed from a flat plate centrally mounted in 'fixed relationship to the operating spindle 5|.

The end of the spindle that supports the plate maybe squared or provided. with one or more flats, so that the plate may not rotate relative to the spindle. Pivots 15 on the plate or shifter 65, serve to mount the inner ends 16 and ll of a pair of T- links 18 and 19 at opposite sides of the spindle 5|, whereby rotation of the spindle and its associated shifter plate will result in longitudinal reciprocation of the T-links in unison. The head-bar 80 of T-link 18 has its opposite ends perforated as at 8| and 82 for the reception "or the turned lugs 83 on each of the secondary By means of these link pairs, the lower ends of the bolt plates BI and 62, and the lower horizontal bolt plate 64, are adapted to be moved in unison with the bolt structures at the upper end of Fig. 4.

'From all of the foregoing, it will be understood by reference to Fig. 2, that rotation of the main spindle 5| by means of handle 48, will result in'extending all of the bolt plates to the outward limit of travel so that each bolt plate will engage its cooperative channel or groove 31, and since the channels or grooves are joined at their ends to form a continuous recess within the doorway of the cabinet, a rather effective seal will be established when the door is closed and bolted. This seal in combination with an'i'nsulated door and an insulated cabinet, is most desirable and constitutes an advance in cabinet structures of the insulated type. The reason for this is that any insulating material when subjected to high temperatures will liberate gases, thereby generating high pressures within the cabinet capable of bursting the cabinet if confined too securely, or of igniting and possibly damaging the contents of the cabinet if the gases are liberated too freely from the cabinet interior. By this is meant, that the metal of the cabinet or its closure, when subjected to high temperatures, will promote the liberation of hydrogen gas from the insulating material, and since this gas is of a combustible nature it should be liberated from the cabinet as a slight seepage, rather than freely, in order to minimize the possibility of ignition and explosion within the confines of the cabinet. The type of seal effected by the bolting means of this invention safeguards the cabinet against the hazards mentioned. The insulating material within the door and between the inner and outer shells of the cabinet serves to effectively protect the contents of the cabinet from damage by fire or extreme heat to which the device may be subjected during a confiagration. The door bolting means, being semi-tight to the extent necessary for precluding ignition and explosion of liberated gases within the cabinet is nevertheless sufficient- 1y tight to prevent directed water and other foreign substance from enterin the cabinet under the adverse conditions accompanying and incidental to a confiagration.

It sometimes occurs that a floor or other support upon which the cabinet is standing, will collapse and allow the cabinet to plunge for a distance approximating the height of a building story, and under such circumstances it may generally be expected that the cabinet will land with its bottom foremost upon the floor below. The impact resulting from such a plunge will ordicialztype of connection with the boltework link structure. Withreference toFig. san he. er a o Fig. 4, it will be noted that links 95 have their upper. ends 9.1 pivoted at .96 upon-the turned 'lugs of thesecondary boltshifters 92 and93, w-hereas the lower. ends of said links have their studs. 98 rec ved inth elongated slots, f t ebolt plate 65.. Accordingly; it mi ht be. expected that by restraining the; bolt plate 54 against downward shiftability, the. bolt-work could be actuated: to moye...the links .95, downwardly without moving the bolt plate, the studs 98 traveling freely, in the slots: 9.9. .But. such: action does .not, normally' occur,v due. to .the interposition; of springs l 3.0, .eachofwhich has an. u per end-.l OJ abutting a..1ink.95, or anextension.lu2 thereofwhile the oppositeend I03 of thespring;bears-upon, oris fixed to,.the.bolt plate;64; From-this-it will be understood that downward. movement of the, links 9.5. is transferredi to. the bolt. plate .64. through the springs. I 0,0 so that; under normal conditions the..bo1t; plate. will more with. the links, without any. perceptible-movement ,difierential.- However, in. the event; that; a sharp, blow isxanplied 'upwardly against the bolt plate. 65 whilethe bolt isextended, the springs lfifljwill absorb the; shock of thegblowrbefore theforcethereof:may betransmitted to the-links 9.5 to undesirably actuate, the entire...bolt -work assembly; The relationship of the :spring tothe link and; thetbolt. plate, is very clearl .illustratedby. Big-1. 3. .As shown. ther in, the lower end-1,lfl..3.of the; springJisanchoredin an aperture l 04. .pro.vided:in-.a shoulderlfii that extends the full length of the-.boltzplatet4z, Like all of the other bolt plates,, the lowerbolt plate 64 f is guidedin. its upward; and downward move: mentsbymeans of? the stud and;s1ot arrangement indicated at 61-68. A rei11forcing;bar-.H together with .flange 5t; furnishes the necessary mounting means. forthe studs. 88':- which enter the; elongated slot, 6]; for; guiding the; horizontal bolt plate, 64. in its movement toward and: from the extended.and;retractedmsitmns;

From-thefore oingit'shouldbeunderstoodthat the. cabinet. ofjthis invention when; subjected j to asharp impact; from below, at; any. time that. the bolts are, extended. as in; Fig. 24, will; be; safeguarded. against. accidental retraction of: all its boltv p1ates,.by reason. of; the. resilient; connection betweenthe bolt plate, 64 andits associatedlinka e. The. intervention of springs; lfllli'underrnore mall circumstances does. not; interfere. with the extension and retraction; of'bolt; plate; 64 simultaneously withthe remainin boltplates:. ,The safety, linkage. becomes operative; only in the emergency heretofore mentioned: Itmay be noted that the, links other than thoseat 95, have regulationpivotalconneotions {05 with their respective bolt plates, molest-motion;connection being there required; however, the bolt-work obviously wouldpperate satisfactorily if two or: more of the bolt plateswere-equippedwith resilient lost-motion connections illustrated andexplained with reterenc t ba l use.

Referring now to the extreme left ends of the horizontalIbolt plates 63 and64, it will be noted that their outer edges Ill! and lfl8',.respectively, are provided with rather long inclines or tapers beginning. at the points A andextendingtothe miter'of each bolt plate end. These tapers. or inclines it will be noted, are located adjacent to the hinge region of. the door, andtheir function is to perform as cams to engage the forward portion of the upper and lower jamb areas of the doorway for automatically retracting all of the door bolts, in the event that the doorinadvertently is moved toward the closed position with the bolts-extended. As will be understood, serious damage might result from an attempt to close the door while the'bolts are extended, unless some means were provided for automatically retracting the bolts. With reference to Fig. 1, it

may be observed that the inclines or cam surfaces l9? and I08 will engage the doorway of the cabinet at approximately the locationsB and C, respectively, should the boltsbe extendediwhile the door is moved towardthe closed position, whereupon a camming action will occur causing the upper and lower bolt plates to be forced inwardly to their retracted positions. The vertical bolt plates, of course, will likewise retract due totheir connection with the bolt-work, as the latter will necessarily be actuated automatically upon forceful retraction of bolt plate 63, for example. Under the circumstances referred to, it willnot be necessary for anyone to manipulate the handle.

A cabinet structure of the character. herein illustrated and described possesses manyadvantages not heretofore embodied in devices. presently known and used; The improved structure is not unduly heavy, and it may thereforebe moved about:in much the same-manner assan ordinary or commonly. known. file" cabinet; yet it furnishes a high degree-of protectionagainst internal explosion or destruction of: its contents in the-event of fire, water and building. collapse. The constituents of the improved cabinet are simple and inexpensive, and are not likely to become out. of order, so thatv maintenance costs are lowandany necessary; repairsmay, be accomplished inexpensively. withoutreturning. the cabinet tothefactory or other service station. flhe automatic safety features with. which the device'is equipped enables it towithstan l abuses which would. in other cabinet structures result in springing thehinges, the door. or the cabinet proper, or otherwiseinflicting serious damage upon-the assembly .As hereinb efore stated, injury tothe cabinet by possible explosion, or destruction of the'contcnts by accidental release of the door bolts resultingfromimpact, are effctivelyreduced'to a practical minimum. in. the. improved structure of this invention.v It is of importance tonote thatthe peripheral closure formed by thefo'ur door flangesfiiiand 44serves, in the closed positionof the doorito lockthe door and-the. cabinet body to'gethersoasl to addv structural strength tdlthecombihation for opposing any forces tending. to crush or distort. it. -The long side walls of. the cabinet are, thereby reinforced against bulging. or buckling duringa. drop, or upon'ex- 'posure to. fire oii'hea t. The fl'angelockfbe'tween thefdoor and cabinet also has the efiect oiobstructing access. of atmosphericoxygen to'the jarnb pace 'along the door. edgesin' the event that. the. jar'nb. space becomes; filled withfcompustimegam, from the cabinet interior. Ac-

Icoidingly, any combustible. gases: liberated from the jamb space will have an opportunity to reach the cabinet exterior along the outer edges of the door, where combustion thereof will be harmless and reduced in force because the gas will there be unconfined. The elongated door bolts, being along the extreme inner edges of the door, perform as flame arresters against any small explosions that might possibly backfire into the jamb spaces, although this possibility is reduced to a practical minimum by the flangess 43-44.

The elongated door bolts and the flanges 43-44,

It is to be understood that various modifioations and changes in the structural details of the device may be made, within the scope of the appended claims, without departing from the spirit of the invention.

. What is claimed is:

1. A cabinet of the class described, which comprises an outer shell having top, bottom, rear, and 'side walls, an inner shell likewise having top, bottom, rear and side walls, said inner shell walls being of reduced proportions such that the inner shell fits within the outer shell with the walls of one shell spaced from the corresponding walls of the other shell, said shells having corresponding forward marginal edges spaced apart near the front of the cabinet, a series of door jamb inserts each adapted to join a wall of the inner shell to a corresponding wall of the outer shell at the cabinet front, said inserts each overlapping a margin of the inner shell and comprisinga longitudinal door bolt keeper channel and an adjacent sloping jamb face, the

channels all being fitted to form a single circumferential inner recess near the' cabinet front, with the inserts welded at intervals to both shells for rigidity and resistance to deformation, insulating material of limited compressibility between the shells, and a multiplicity of reinforced shell-spanning shelves having edge portions horizontally disposed and weldedto the overlapping area of the inner shell and the jambinserts, to

form therewith a unitary rigid imier structure highly resistant to crushing forces imposed upon the outer shell and transmitted to the inner shell through the insulating material.

2. A cabinet of the class described, which comprises an outer shell having top, bottom, rear, and side walls, an inner shell likewise having top, bottom, rear and side walls, said walls being of reduced proportions such that the inner shell fits within the outer shell with thewalls of one shell spaced from the corresponding walls of the other shell, the forward edges of the inner shell terminating at aisubstantial distance from the front of the cabinet, a multiplicity of reinforced shell-spanning shelves having front edges terminating near the forward edges of the inner shell, and including marginal portions welded to the inner shell and forming therewith an integral unitary inner structure highly resistant to crushing forces imposed upon the outer shell, 2. series of door jamb inserts along the top, bottom, and side walls of both shells, and placed end to end for providing a continuous door jamb, said inserts being connected to the inner shell only at spaced intervals remote from the jamb areas of the inserts, thereby to establish a heat conductivity break at the inner shell for interrupting the passage of heat from the exterior of the cabinet to the interior thereof at a series of locations removed from the jamb areas.

3. A cabinet of the class described, which comprises an outer shell having top, bottom, rear,

and side walls, an inner shell likewise having top, bottom, rear and side walls, said walls being of reduced proportions such that the inner shell fits within the outer shell with the walls of one shell spaced from the corresponding walls of the other shell toreceive insulating material, an insulated door hinged for closing upon the inner shell to seal it against ingress and egress of foreign matter, a series of door jamb inserts along the top, bottom, and side walls of both shells, and placed end to end'for providing a continuous door jamb, said inserts being connected tothe inner shell only at spaced intervals, thereby to establish aheat conductivity break at the inner shell for interrupting the passage of heatfrom the exterior of the cabinet to the interior'thereof, a circumferential exterior channel formed integrally with the outer shell and bounding the continuous door jamb, and a cooperative continuous flange on the door for entry into said channel when the door is closed, to lock the door and cabinet together andpreclude side wall bulge and distortion during a drop orexposure of the cabinet to exteriorly applied heat.

4. A cabinet of the class described, which comprises an outer shell having top, bottonnrear and side walls, and a forward continuous door flange channel constituted of grooves formedin all but the rear wall, an inner shell including walls corresponding to those of the outer shell, the inner shell being of reduced size to fit within the outer shell leaving spaces between the corresponding shell walls for insulating-material, a door jamb insert of open frame construction fitted to the top, bottom, and side walls of the inner shell, but out of intimate full contact with the walls of the inner shell so as toprovide a heatconductivity break between the exterior and the interior of the cabinet, and a succession of spaced welds within the confines of theforward channel for anchoring the door jamb insert to the outer shell walls.

5. An insulated record container which comprises in combination, an outer shell having-top, bottom, rear and side walls, an inner shell including walls corresponding to those of the outer shell, the inner shell being of reduced size to fit within the outer shell leaving spaces between the corresponding shell walls containing insulating material, and a door jamb insert of open frame construction fitted to the top, bottom, and side walls of both shells, but out of intimate full contact with the walls of the inner shell so -as to provide a heat conductivity break between the exterior and the interior of the cabinet.

6. An insulated record container which comprises in combination, an outer shell'having top, bottom, rear and side walls, an inner shell including walls corresponding to those of the outer shell, the inner shell being of reduced size to fit within the outer shell leaving spaces between the corresponding shell walls, a door jamb insert of open frame construction fitted to the top, bottom and side walls of the inner shell, but outof intimate full contact with the walls of the inner shell, so as to provide a heat conductivity break and a gas pressure relieving space between the exterior and the interior of the cabinet, a door for therecord container, and means associated with said door and the jamb insert performing the peripheral groove of the outer shell, and

means securing a circumferential edge of the insertto the outer'shell at a plurality of locations within the bolt fkeeper groove of the outer shell of; the cabinet, leaving portions unsecured fertile-release of gases from the space'between 'the'shells. "i r -8. A cabinet of the class descri'bed'which comprises an outer shell having top," bottom, rear and-side walls, and a forward continuous door ,fiange channel constitute'd of grooves formed in aubut the rear Wall; an inner shell including walls' correspondin'g' "to those of the outer shell, thefinn'er shellbeing of -reducedsiZe to fitwithin the outer shell leavingspaces between'the corresponding shell 'wallsftolreceive insulating material, and-a door iamb insert df open frame construction fitted to the top, bottom and side walls "of the inner shell out of intimate full contact wii'slrthe vvjallls'of the inner shall so as to provide a 'heatconductivitybreakf between the exterior and-theinterior-of the cabinet, a series of: spaced welds within theconfines of the forward channel for anchoring the door jjamb insert to the outer shell walls; a door 'for the cabinet including a "jamb complementary to the door iamb insert of the cabinet, elongated shiftable bolts 'on 'the seer-for efiecting a substantially continuou seal mteneny "6f the door jamb insert when the door-is closed anemones, and flange means on 5 the door for entering jthe forward channel and *substantially 'sealing"the doonjamb insert exteriorly of the cabinet in the closed condition of thedoor and acting asa diffuser preventing the 'forniation' of a localized explosive mixture of gases'atthe -janib when the=door is closed.

9. An insulated'record =containerof the class -'described, which comprises an outer shell having 'top; *bottorn, rear and side f Walls, an inner shell -including wen corresponding 'to those of the emergent-the inner shell being of'reduced size itofit' bodily within the outer shell leaving spaces between the correspondingshell walls and pro- *viding :an access aperture at the front of the record container, insulating material of limited compressibility in the spacesbetween said shell walls; a pair o'f continuous I channels arranged substantially at right} angles to one another and bounding: the access opening, an insulated door for closing the acces'sf'opening, and including "flangefand extensible {bolt means to enter said channelssubstantially-at;right angles to clutch "and grip the inner shell walls at the channels 'j'whenever the bolt means are -extended, and a series df'*horizontalrigid shell-spannin shelves -welded to the' opposite side -'walls of the inner sfhell to provide compartments for uninsulated lightweight file drawers to be'fire protected normally by' 'the' insulated door, said shelves forming with the inner shell aunitary braced structure highly resistant to crushing forces imposed upon the outer shell and transmitted'to the inner shell through the partially compressible insulating ma terial.

10. An insulated record container of the class described, which comprises'a rectangular outer shell and an inner shell each having a forward "concealing th anchoring meanstherein, thereby 545 portion defining a front opening of the cabinet, the forward portion of the outer shell all around the opening being turned inwardly and shaped to provide a continuous channel exposed toward the front of the cabinet to receive a door flange, a rectangular insert frame providing a door lamb, and comprising an inner Portion fixed to the inner shell at intervals, leaving intervening areas of the insert frame out of intimate full contact with the walls of the inner shell so as to provide a heat conductivity break therebetween, a'forward portion on the insert frame providing a door jamb area, and an adjacent out-turned flange to seat within the channel of the outer shell, said flange being fixed within the channel at intervals to likewise provide a heat conductivity break at the channel, and an inner continuousbolt channelin said insert frame intermediate the door jamb area and the heat conductivity break first mentioned, said bolt channel having a mouth substantially at right angles to the mouth of the. first mentioned channel, and a door movable toward and from the cabinet opening, and having a lamb area, a rearwardly turned circumferential flange to enter the outer shell channel, and a series of bolt plates projectable in the plane of the door into and from the bolt channel of the insert frame, saidbolts and the circumferential flange of the doorserving to confine the jamb areas sufficiently to preclude localized accumulation of explosive gases within the lamb area,

while effecting a difiused release of accumulated gases around. the door forwardly of the door flange.

11. An insulated record container of the class described, which comprises a rectangular outer shell and an inner shell each having a forward portion'defining a front opening of the cabinet, the forward portion of the outer shell all around the opening being turned inwardly and shaped to provide a continuous channel exposed toward the front of the cabinet to receive a door flange,

a rectangular insert frame providing a door jamb, and comprising an inner portion fixed to the inner shell at intervals, leaving intervening areas of the insert frame out of intimate full contact with the walls of the inner shell so as to provide a heatconductivity break therebetween, a forward portion on the insertframe providing a tinuous bolt channel in said insert frame intermediate the door jamb area and the heat conductivity break first mentioned, said bolt channel having a mouth substantially at right/angles to the mouth of the first mentioned channel, for receiving plate-like retractable. door boltsilocated inwardly of the flange which enters thesfront channel of, the outer shell, .whereby the lamb area is confined sufi'iciently' to effect. diffusion before release, of gases emanating from the cabinet past the jamb area. I

EDWIN H. MOSLER. HARRY iH. LYNN.

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