US1551687A - Elevator door - Google Patents

Description

Sept. l, 1925-.

C. W. PEELLE ELEVATOR DOOR Filed Dec. 12, 1924 l m INI/Enron Ammer.

Patented Sept. 1, 1925.

v,UNITED STATES PATENT OFFICE.

CHARLES w. PEELLEOF NEw'YORK, Y., assIGNOR To riHE PEELLE COMPANY, OE

BROOKLYN,A NEW YORK, A coRPORATrON OF NEW YORK.

ELEvaTOR DOOR. E Y' Application filed^ December 12,1924. Serial No. 755,443. 'n

To all whom t may concern Be itknown that I, .CHARLES W.' PEELLE,

a"-citizen of the UnitedStates, residingf at Douglas M`anor,'inv the borough of Queens, city fof New York, county of Queens, and State ofV New York, have invented'certain new 4and useful Improvements in Elevator Doors, of which the following is aspecification, reference being hadtherein to the accompanying drawings, which form a Apart thereof.

, My invention relates to elevator doors, and more particularlyto reproof warehouse elevator doorsof the socalledl coun terbalanced passftype. Thefword pass-type when applied to elevator doors refer broadly to a construc-V tion and arrangement of doors in which the twoV vertically and oppositely movable sections of a door, connected by flexible chains, or other connecting-means passing over isheaves, during their opening movef ment, overlap door sectionsat adjacent door openingsaboveor below, or both,the door. opening closed by any particular door.' pass-.type construction of door visemployed when ithedoorope'riingat any floor is of la heightwhich does not afford' suflicient'space or guides.

above orV below that opening to receivea door section when' a door is fully' open, even though the doors' at the adjacent floors are closed. Infsomey instances the space betweenthe lintel' of one dooropening and silll of` the opening above will not eX-.` ceed from Vtwelve to ,eighteen inches, while the door sections themselves may be ive'or For manygyearsffireproof elevator doors havev 'been constructed in which`4 the oppo siteand vertically movable sections of each door are each mounted upon separate lrails These rails or guides haveextended vertically in parallel relationto each other, both rails commonly beingv continuous 'rom`theftop to .the bottom ofV the shaft; orthroughout the .entire series of V, door'openings closed bythe counterbalanced l doors.

With this rail construction, the sections 'of each door have vertical movement in Opposite directions but in parallel planes. Inflaterdevelopmentsof the pass-type of door, arail construction has been employed by which when the doors are closed their sections kwill be in substantially the same ve1ti. cal"plane,vbut by which, during the opening' movements, the different sections will `have a horizontal component of move` ment permitting them to pass from this plane to a parallel plane so'as to pass, or lap a *door ,at an adjacent door opening. This last named pass-type of door requires for its convenient vinstallation and opera# tion, a spacing of approximately eighteen inches between the sill of one' door opening and the' lintel of the opening` below, or vice versa, and doors now being extensively manufactured have been found adeoluateA to' meet the conditions where suficient space is available for their yproper installation. This l(,:onstruction of door, from the fire retardant'viewpoint, has the advantage that when itis closed, both door sections are brought close to the wall of a shaftso as to afford the minimum clearance` about the door through which, in the event of hre, llames orgases may pass from a shaft to, the Afloor l,of a building, or Yin the opposite direction. i n

` `VThedoors, the sections' ofy which have movement in parallel vertical planes only, have heretofore possessed the disadvantage that from the viewpointfof fire protection, the f spaces about and vabove the door section-p04 sitioned more within the shaft, ordinarily the upper section of the door, are such that they permit flames, gases and water to pass the door section,land hence have never been approved by the authorities as affording adequate lire protection.

`fVViththe above 'conditions in mind, I have provided an elevator door in which the two sections have simultaneous, vertical movement inloppos'ite directions in parallel vertical planes, onev of these sections, the one positionedmore within the shaft, being provided with a shield so constructed that when the door at any opening is closed, and the door at the adjacent opening is also closed, it will` Yautomatically assume a position to substantially completely closethe gap be` tween this door section and the elevator shaft, lwhile being capable of `being moved to a position which will permit the door'secat the adjacent floor, or the door section at this floor to pass the door carrying the shield. This lintel shield, which may be aptly termed a movable lintel, is so constructed and mounted upon the door as to afford no material spaces or passages between it and the top of the door carrying it, when the latter is either in the open or in the closed position. Furthermore, this movable lintel or shield in its functioning is entirely automatic, its movement from its operative position in closing the gap between the door section and the wall of a shaft during the movement of a door cooperating therewith, resulting from the opening` and the closing movements of the door carrying it, or the door at the adjacent floor, so that under normal conditions, or when a door is closed, a barrier effective to prevent the passage of flames, smoke, gases and water to or from an elevator shaft about the door section is afforded.

Of course it will be understood that the rail structure affords a barrier at bot-h side edges of the door section, and that the other door section serves as a barrier at the bottom thereof.

To secure this result and avoid the presence of springs, l preferably so construct this movable lintel or shield that while it is permitted to have pivotal movement t0 and from its closed position, it will be so overweighted as to cause its automatic action.

In the event of a fire, and the direction of a stream of water from a fire hose against the top of a door, there is always likelihood that the force of this stream, if directed against this lintel or shield, will so actuate it as to permit the water to pass through the gap between the door section and the wall of a shaft and also permit iiames, smoke or heated gases to pass between the door sections carrying the shield and the shaft. To obviate this condition I provide means controlled by a fusible medium, whereby in the event of excessively high temperatures within the shaft, the movable lintel or shield will be positively locked against movement, and thus obviate the objectionablev conditions above referred to.

A door embodying my invention has been found to afford a degree of protection with a type of door having sections movable in parallel vertical planes, which has not heretofore been attained by doors of this construction, and one which has been approved by the authorities whose duty it is to pass upon the adequacy of door structures so far as the reduction of the fire hazard is concerned.

The invention consists primarily in an elevator door embodying therein connected sections having simultaneous vertical movement in opposite directions, guides for said sections respectively extending in parallel planes whereby one of said sections is more remote from the wall of the shaft than the other, a shield carried by the section more remote from the wall of the elevator shaft, and extending therefrom into close proximity t0 said wall, pivotal supports for said shield, and means acting upon said shield whereby pivotal movement thereof is permitted upon engagement between same and a door section at an adjacent landing, to afford clearance for relative movement of said door sections, `and said shield is caused to automatically assume its normal position when it is disengaged from said other door section; and in such other novel features of construction and combination of parts as are hereinafter set forth and described, and more particularly pointed out in the claims hereto appended.

Referring to the drawings,

Fig. l is a vertical section of elevator doors embodying my invention, upon adjacent floors;

Fig. 2 is an enlarged view of a. portion of the upper door section from the floor side of the door;

Fig. 3 is an enlarged vertical section of the portion of the door shown in Fig. 2; and

F ig, et is a horizontal section showing the rail construction and a portion of the movable lintel or shield.

Like letters refer to like parts throughout the several views.

In the embodiment of the invention shown in the drawings, A indicates the door opening upon one floor of a. building, and B the opening upon the floor below. Closing the opening A is an elevator door composed of an upper section a and a lower section these sections being mounted respectively upon guides or rails c and d which extend throughout substantially the entire height of a shaft, similar guides or rails being employed adjacent each jamb of the door opening within the shaft. The rails c and Z are carried by what is known as a Wall angle e which serves as a barrier to prevent flames, gases and smoke from passing about the sides of the various door sections a and o.

The lower door opening B is closed by a door similar to that closing the opening A, consisting of two sections a and mounted upon the rails c and CZ respectively.

The door at each opening A and B has the upper section a or a mounted upon the rail c, which are positioned inwardly of the shaft with relation to the rails d, and the lower section b or mounted thereon. By this construction a pocket is formedl between each of the sections a-a and the wall of the shaft, Yadapted to receive the lower section, as b, of the door closing the opening of the iioor above, thus permitting the upper section of the door upon one floor to have its top edge positioned in close proximity to the lower edge Aof the'lower door section on a Vfloor immediately above. Y' This construcj tion ofthe,doors,`also permits the upper sectiony at, onek opening to pass .the lower section rof al door atA the landing above, during the vopening,.movemento'f a door. Hence whentlie door sections are arranged as described, thevup-'per section of any door may pass. the lower section of the door above, and the lower sectionl of that door may` pass the, upper section yofthe door below,'which I is" a condition characteristic ofy the ,so-called pass-type of doors. v j l The sections a-b and 00L-b are connected by'theiisual flexible connecting means conimon`to kdoo-rskof the so-ealled counterbalancedftype, Apermitting and causing the simultaneousmovement of these sections in opposite `directions upon parallel vertical planesvduringthe opening and closing movement of the doors. j Y

, :The foregoing construction is old and well known in; this art, my invention relating more particularly to `aconstruction in which the pocke-t formed between the upper door section and the wallv of` the elevatorshaftv is iso closed under, all conditions as to prevent the passage of flames, smoke or gases across r,the top of this door to within the floor,

of'abuildingthe opening of which is closed thereby, or'from said floor to `within the Carried bythejdoor sectioinmore remote fremniewau of un Shaft is a.' Shield f which extends acrossv the .top of said door section, toward `andinto close proximityto tlie'wall of a shaft above the lintel of the door openi-ngAnor rI provide the doo-r section witli'pivotal supports for Athis shield consisting ofltrunnion fitting g co-operating the top v.bar thereof.

with brackets h secured to the opposite side bars of the door and projected upwardly of y These fittings and brackets are s o set` that the trunnions lcome close to'v the face ofy the door presented toward-the wall of a shaft and are'so set below'the shield as to permit the shield, when' actuated by engagement with the section of thedoor above, to assume a position parallel with ,the-...section carrying it, and thus occupy theqfminiinum of space and afford sufficient-,clearance at the entrance to the fpocketgforjthe reception ofsaid section` of thedoor for. thegopening on the floor above. Secured to,orforming a part ofthe shield f is lan anglejpositioned adjacent the face ofr the door` section presented inwardly of the shaft andextendinginto closer proximity to, ory in engaging relation with,.thetop bar theredfQ/Theyshield f and'angle z' extend forlgsubstantially the entire` width f of the door, iny factbeingslightly in excess of the widthofithejdoorto the extent of the thickness of the brackets h. The upper face of c said brackets may be ycurved where required to permit the free pivotal kmovement ofthe shield f and angle i. Theconstruction of said shield and said angle issuch as to form a sufficiently tight joint above the top of the y door section proper to form a. barrier adequate to prevent the passage of any material volume of Haines, smoke or gases. n y

. Acting upon the shield f is means which will permit pivotal movementl of said shield as a result of the engagement'between same and the door section vat an adjacent floor,

whether this engagement results from. the.

movement of the section carrying thesliield or the movement of said other section, andV .section carrying same and the wall ofthe shaft, orwhether itis turned so as to position the shield parallel with the door as a result ofthe -movement of thefdoor section c carrying same, or the co-operating door section closing an opening at the adjacent floor,

yThe construction of the shield, andthe manner of mounting same as above de-` scribed, results in a condition in which the shield f has a normal tendency toassume and remain in a. horizontal plane, but under normal conditions is free to haver pivot-al movement as a result of relative movement of the door section carrying same and the door section adapted to enter the pocket closed byY this shield.

In the form of the invention sliown,-tlie.

door section adapted to engage or be en-` gaged by the shield f is provided with a bevelledV toe guard and Haine angle 71:,tlie pitch of which is approximately 459. 'This angle is riveted or otherwise secured to the lower bar of the door section'carrying. same, and e, projects downwardly toward the wall of the shaft extending Vin fairly close proximity to said wall.

section carrying the shield, engages .the shield f adj acentthe wall of the shaft, thus ensuring a gradual movement of the'shield and lessening the danger of breakage of` parts through a too'violent or rapid movement of said shield. f

By the normal operation of -the door, Iv

have reference to the ordinary procedure of.

opening and closing the doorby the opera- This shield in the movement 'of` the door section carrying same, ortlie doorV io; Y

tor when the elevator car is in ordinary use. In the event of fire, however, and the development of an excessive temperature about the door as a result, it is desirable to reduce the fire hazard due to the pocket between the door section andthe wall of the shaft by preventing this shield from functioning in its normal manner. To secure this result, I provide means operative to prevent the pivotal movement of the door, which means is normally maintained in its inoperative relation by a fusible medium so that it will come into operation only as a result of the melting of this mediums In lthel form of the invention shown, the means for preventing pivotal movement of the door consists of a hardened bolt or pin m slidably mounted in a pocket m formed in either or both fittings g' and opening downwardly of these fittings when the shield f is in its horizontal position. Such a bolt or pin is preferably mounted in each trunnion fitting g so as to afford supporting means therefor having pivotal movement with the door, and preferably is surfaced with copper or some other non-corrosive material so as to minimize likelihood of its failure to operate in an emergency after a long period of disuse. The pin is normally held in position within its recess by a fusible barrier n. closing or partially closing the open end of the recess.

Formed in theV top bar of the door section a or a, and carrying the shield, is a socket o adapted to receive this bolt. It is not essential that the bolt shall b'e mounted in the trunnion fitting g, the use of this fitting for this purpose being merely a matter of economy and convenience.

In the accompanying drawings, the door sections ril-a are shown as being provided with the usual or customary offset astragal construction p, and the sections b-Zi with the usual truck bar g, and its toe guard .r projecting to a point below the co-operating section of the door. The upper door sections a-a are provided with the usual bumpers s.

The operation of the herein described elevator door is substantially as followsz- In warehouses using doors of the general construction herein referred to, all doors in a shaft are supposed to be closed except when an elevator car is at a floor, and the doer is open to permit ingress to, or exit from, the fioor by way of the elevator. When the doors are so closed, the shield of each door will be in horizontal position,

, as shown in Figs. l and 2 of the drawings,

thus effectively closing thegap between the door carrying same and the wall of a shaft. The pass-type of door requires for its operation, doors at adjacent door openings adapted to co-operate with each other to the extent of moving the shield or movable lintel during the opening movement of either of these doors. For example, in opening the door at the opening A, the door at the opening B remains closed, but nevertheless the door section b in its descent during its opening movement, by reason of the short distance between the sill of the opening A and the lintel of the opening B must pass between the section a of the door opening B and the wall of the shaft, and in so doing must engage and actuate the shield f carried by the door section a, to permit the section Z) to enter the pocket formed between this section and the wall of a shaft, or to lap the section a.

As the flame angle or toe guard 7c engages the shield f close to the wall of a shaft, it will cause said shield to pivot about the trunnion fittings g and assume a parallel position with relation to both sections and af, this movement, by reason of the inclination of the angle or guard it' being more or less gradual according to the speed of movement of the section Ordinarily the initial opening movement of a door is slow so that there is little likelihood of the breakage of the trunnion fittings g or brackets It while y thus actuating the shield.

As the shield is thus turned upon its pivot, the counterweights 7' will be so moved as to bring them to a position where they will exert their maximum effect in overbalancing the portion of the shield f between the trunnions of the fittings g and the wall of a shaft, and be so off center as to ensure a return pivotal movement of the shield with the movement of the door as this is permitted by the passage of the flame angle or toe guard k past the upper portion of the door section a and its shield f. This same operative effect is secured when the door at the opening B is opened, the sole difference being that the section a of this door has movement in relation to the section Z) so as to pass inwardly of it and the shaft. In either instance the operation of the shield results from its engagement with, and disengagement from, the door section at an adjacent floor.

Under normal conditions the bolt m is retained within its recess m by the fusible barrier n, thus offering no obstruction to the pivotal movement of the shield. In the event of fire, however, it is desirable to make the barrier afforded by the shield f and its angle z' permanent when the temperature about the door is sufficiently high, as by the presence of a flame either .on the shaft or on the floor side of the door, to make the passage of flames and smoke across the top of the upper door section imminent. Furthermore, under some conditions the stream from a hose may be directed against this shield, or a considerable volume of water may flow from a floor above, both of which, if the shield were; not restrained to prevent its pivotal movement, would per- Init such Water to pass' from the shaft to uponthe floor, the; doorl opening of which is closed by. a door. With any serious lire, there is valways a likelihood of back drafts, which, if the shield were `not restrained, would cause the actuation ofl this shield, and` thus permit flames, smoke and'gases to follow from the shaft to the iioorof a building about a door, through the door opening close-d byl saidr door. These results can Vfollow only'when aV fire'fhasreached a' point wherev thetemperature about a door hasbecome materially elevated, so that this elevated temperature can be relied upon with a reasonable degree of certainty to melt the fusible medium n and permit the bolt m to dropwithin the socket 0in the top bar of a door carrying a shield f before there has been opportunity for any of thesejagencies to actuate the shield in the f manner described. Y

`Byusing a hardened steel bolt m the shield maybe held sufficiently firmly to resist tlie force of a stream of water, or the suction from back drafts. By coating this bolt with copper or other non-oxidizing material, Vthe likelihood of itspfreezing in position through corrosion after long non-use, is avoided. In fact this bolt mechanism is merely a precautionary expedient, and in many instances occasion requiring it to act will never arise. If, however, there should be such an occasion, the construction and conditions must be such as to ensure reasonable certainty of its functioning.r

By using a gravity bolt, spring action is not reliedL upon, and infact in fireproof structures, wherein the fire hazard is a factor, the use of springs is to be deprecated. Ity is for this Y same reason that thecounterweights j are used instead of'springs acting upon the shield, since such weights are morereliable than springs would be.

The desired results can be secured; only by mounting the shield f upon the door section itself, sov that itvhas movement with the door during the opening and closing movements thereof while being positioned within the lshaft and above the lintel-of the door in a manner to effectivelysupplement the lintel 'of the door opening in closing the shaft about thetop :of the opening adjacent the door structure.l 1

It may be" noted that the direction of a `strearr'r of water, or the action vof back drafts toward the shaft from a-floor of a building cannot in anyway operate the shield since the angle z' will 'limitthe movement of the shield in passing from the vertical to a horizontal position. l f w It is not my intention to limit the invention to the precise details of construction shown in the drawings, it being apparent that such may be varied in adapting the invention to doors of different dimensions or designs, Without departing from the spirit and scope-of the invention. i

Having described the invention, what I claim as new yand desire to have protected by Letters Patent, is i y 'i 1. An elevator door embodying therein connected sections having simultaneous vertical movement in opposite directions, guides for said sections respectivelyrextending in parallel planes whereby one of said sections is more remote from the wall ofthe shaft than the other,-a shield carriedfby the section more remote from the wall of the elevator shaft, and extending therefrom into close proximity to said wall, pivotal supports for said shield, and means acting upon said shield whereby pivotal movement thereof is permitted upon engagement between same and a door section at an adjacent landing,v to afford clearance for relative movement of said door sections, and said shield is caused to automatically assume its normal position when it is disengaged from said other door section.I

:2. An elevator kdoor embodying therein the section more remote from the wall of the elevator shaft, and extending therefrom into close proximity to said wall, pivotal sup-' ports for saidv shield, means acting upon said shield whereby pivotal movement thereof is ,permitted upon engagement between same and a door section at an adjacent landing, to afford clearance for vrelative movement of said door sections, and said shield is caused vto automatically assume its normal position when itis disengaged from said other door section, means whereby pivotal movement of said shield may be prevented, and a fusible medium normally making lsaid lastnamed means inoperative, but rpermitting it to become operative in the event of fire.

3. An elevator door embodying therein connected sections having simultaneous vertical movement in opposite directions, guides for Isaid vsectionsrespectively extending in parallel planes whereby one of said sections is more remotefriom the wallV of the elevator shaft?, a-shield carried by the section more remotefrom the wall of the shaft, and extending therefrom `into close proximity to said wall, pivotal supports for saidrshield, and weights carried by said shield and overbalancing same, whereby said shield is permitted to have pivotal movement upon engagement between same and a door section at an adjacentfloor `to afford clearance for relative movement of said door sections, and is caused to automatically assume its normal position when it is disengaged from said other door section.

4. An elevator door embodying therein connected sections having simultaneous vertical movement in opposite directions, guides for said sections respectively extending in parallel planes whereby one of said sect-ions is more remote from the wall of the shaft than the other, a shield carried by the sec.- tion more remote from-the wall of the elevator shaft, and extending therefrom into close proximity to said wall, pivotal supports for said shield, an angle carried by the edge of said shield above and extending toward and into substantial engagement with the top of a door section whereby the space between said shield and said door section is closed, and means acting upon said shield whereby pivotal movement thereof is permitted upon engagement. between same and a door section at an adjacent landing, to afford clearance for relative movement of said door sections, and said shield is caused to automatically assume its normal position when it is disengaged from said other door section.

5. An elevator door embodying therein connected sections having simultaneous vertical mo-vement in opposite directions, guides for said sect-ions respectively extending` in parallel planes whereby one of said sections is more remote from the wall of the shaft than the other, a shield carried by the section moreremote from the wall of the elevator shaft, and extending therefrom into close proximity to said wall, pivoted supports for said shield, an angle carried by the edge of said shield above and extending toward and into substantial engagement with the top of a door section whereby the space between said shield and said door section is closed, and weights carried by said shield and overbalancing same, whereby said shield is permitted to have pivotal movement upon engagement between same and a door section at an adjacent floor to afford clearance for relative movement of said door sections, and is caused to automatically assume its normal position when it is disengaged from said other door section.

6. An elevator door embodying therein connected sections having simultaneous vertical movement in opposite directions, guides for said sections respectively extending in parallel planes whereby one of said sections is more remote from the wall of the shaft than the other, a shield carried by the section more remote from the wall of the elevator shaft, and extending therefrom into close proximity to said wall, pivotal supports for said shield, an angle carried by the edge of said shield above and extending toward and into substantial engagement with the top of a door sect-ion whereby the space between said shield and said door section is closed, weights carried by said shield and overbalancing same, whereby said shield is permitted tol have pivotal movement upon engagement between same and a door section at an adjacent floor to afford clearance for relative movement of said door sections, and is caused to automatically assume its normal position when it is disengaged from said other door section, means whereby pivotal movement of said shield may be prevented, and a fusible medium normally making said last named means inoperative, but permitting it to become operative in the event of lire.

T. An elevator door embodying therein connected sections having simultaneous vertical movement in opposite directions, guides for said sections respectively extending in parallel planes whereby one of said sections is more remote from the wall of the shaft than the other, a shield carried by the section more remote from the wall of the elevator shaft, and extending therefrom into close proximity to said wall, pivotal supports for said shield, means acting upon said shield whereby pivotal movement thereof is permitted upon engagement between same and a door section at an adjacent floor, to afford clearance for relative movement of said door sections, and said shield is caused to automatically assume its normal position when it is disengaged from said other' door section, means carried by and movable with said shield having a recess therein which extends vertically when the shield extends horizontally, a bolt slidably mounted in said opening, the door section carrying said shield having a socket therein adapted to receive said bolt, and a fusible medium normally retaining said bolt within said recess.

8. An elevator door embodying therein connected sections having simultaneous vertical movement in opposite directions, guides for said sections respectively extending in parallel planes whereby-one of said sections is more remote from the wall of the shaft than the other, a shield carried by the section more remote from the wall of the elevator shaft, and extending therefrom into close proximity to said wall, pivotal supports for said shield, means acting upon said shield whereby pivotal movement thereof is permitted upon engagement be` tween same and a door section at an adjacent fioor, to afford clearance for relative movement of said door sections, and said shield is caused to automatically assume its normal position when it is disengaged from said other door section, means carried by and movable with said shield having a recess therein which extends vertically when loo thesheld extends horizontally, a bolt, having Aits surface provided with a nonoxidizable coat, slidably mounted in said opening, the door section carrying said shield having a socket therein adapted to receive said bolt, and a fusible medium normallyy retaining said bolt within said recess.

9. An elevator door embodying therein connected sectionshaving simultaneous vertical movement in opposite directions, guides for said sections respectively extending in parallel planes whereby one of said sections is more remote from the wall of the shaft than the other, a shield carried by the section more remote from the wall of the elevator shaft, and extending therefrom into close proximity to said wall, pivotal supports for said shield, an angle carried by the edge of said shield above kand extending toward and into substantial engagement with the top of a door section whereby the space between said shield and said door section is closed, weights carried by said shield and overbalancing same, whereby said shield is permitted to have pivotal movement upon engagement between samey and a door sec-- tion at an adjacent oor to afford clearance for relative movement of said door sections, and is caused to automatically assume its normal position when it is disengaged from said other door section, means carried by and movable with said shield having a recess therein which extends vertically when the shield extends horizontally, a bolt slidably mounted in said opening, the door section carrying said shield having a socket therein adapted to receive said bolt, and a fusible medium normally retaining said bolt within sald recess.

10. An elevator door embodying therein connected sections having simultaneous vertical movement in guides for said sections respectively extending in parallel planes whereby one of said sections is more remote from the wall of thek shaft than the other, a shield carried by the section more remote from the elevator shaft and extending therefrom into close proximity to said wall, coi-operating brackets and trunnion fittings carried by said door section and said shield respectively, an angle carried by the edge of said shield and extending towardy and into substantial engagement with the top of a door section, whereby the space between said shield and said door section is closed, weights carried by said shield and overbalancing same, whereby said shield is permitted to have pivotal movement upon engagement between same and the door section at an adjacent opposite directions,

Hoor to afford clearance for relative movefixed my signature this Lith day of Decemf ber, 1924.

CHARLES lV. PEELLE.

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