US2132986A - Light seal curtain - Google Patents

Description

Oct. 11, 1938.

l.. F; JULIEN LIGHE.1 SEAL CURTAIN Filed Jan. 14, 1937 2 Sheets-Sheet 1 Oct. 11, 1938. F. JULIEN LIGHT lSEAL CURTAIN Filed Jan. 14, 1937 2 Sheets-Sheet 2 Gtfornegs Patented Oct. 11, 1938 Y l' fucrn'i` SEAL VUR'rAIN I u w: je .LoullisY F. Julien, Detroit, assgnor to Cham- AberlinMetal Weather StripkCo.,zDetroit, Mich.,

u n V,a corporation gf 'Michiga I "VAiplikation January "14, 1937,' vsrerimwNo. k120,491

Claims. ,(01.- 15s-10)l 1.

invention relates toa light excluding-shade 'or curtain for Windows or yother openings inthe walls-of laboratories, moving picture, operati-ng; X-ray and other rooms from which it-'is essenv tial YthatV every outside ray of lightY be excluded.

An object of the present invention is toso mount a curtain for this purpose' as to preclude theentranceof anylight through or around the edge portions of the curtain when in'closed position, and to provide Vfor free manipulation 'of the curtainV to admit lightjwhensodesired; -It is also an objectA to-A provide "means" for yguiding and holding the edges of such a curtain to permit'ireeV movement Yofthe curtain and at the Sametime prevent its edges 'fromfrwithdrawal'romsuch guiding- -mea-ns Whenmanipulated, thus vdispense ing with the'necessity for crossbracing or stiien-` ing stripsforthe curtain, and to so encloseand protect these edges offithecurtain as to prevent every light -ray from' passing these edges or through minute openingstherein formed by a needle in stitching adjacent these edges to form a hemtherealong, said hem being adapted to cooperate with said guiding and holding means in guiding and: holding the edges ofthe curtain and in permitting flim-ited transverse movement and p free longitudinal movement of the curtain.

It isl also an vobject to provide Vsupplemental side edge guiding means for the curtain which 'means is adaptedftobe received in such edge 'rhems to assist inholding the edges of the curtain WithinV guide channels and permit free klongitudinal ing in the forrnof rods Vengaged within theside movement ofthe curtain-when manipulated to admit light, A said supplemental guiding means having a limited lateral-'movement toprevent the curtain from binding thereon, and preferably beedge hem'sofn'vthe curtain and upon yvhichj the curtain i's'adaptedto slide. Y

It is also an object to further insure the come Y plete-exclusion of light andeiectual holdingand guiding of the curtain, by providing" a rigid frame having side `channelstoreceive theedge portions of the curtainandfsaid supplemental guide rods, Y

said frame being adaptedjrto jiit'tightlyv within the wall opening; or Window casing and'j to be,Y rigidly secured therein, said channels being jsor Vformed as to be'closed'to'the(passage of light therethrough by saidedge portions and rods, said portions being held against Withdrawal Lthrough Y the open sidesofA sjaidchannels', `by'saidguide rods nels, ,a g

It is alsdan objectofv the invention't'o prevent any light rays fromAV passing' around the lower end oflthecurtain byproviding a draw bar for said end jand; providing a xed sill member to receive said drawbar, said sill' memberV and bar cooperating when interengaged, to block the light; and it is also an object to provide means for winding up g;

the,l curtain, such as a spring roller to which the' upper endvof the curtain is attached, this roller being enclose'fd within a light excluding casing to prevent light'rays from passing the upper end ofthecurtaim'said casing being arranged to f acilitate themounting of the roller therein.

Afurther object is to provide certain other new and useiulfeaturesin the construction, arrange- Vment and combination of the several parts adapted topromote the several objects of the invention, all'- as hereinaftermore fully described and shown'in the accompanying drawings, in which Figure 1 isa front elevation, with parts broken away` and 'insection,of a structure illustrative of Y an embodiment ofthe present invention;

Fig. 2 is a, transverse section-substantially upon the line' 2'l--2Aof Fig; 1 and through the window andc'asing to which the structure is applied as illustrated in-Figs. 2 and 3;

- Fig.` 3 is a vertical. section substantially upon the line A3-,3of Fig. 1;" I p 4 is'v a. vertical" section substantially upon the li'ne 4?-#4 of'Fig'.y l; "Figi-Bise, sectional detail substantially upon the" line '5-'5'of Fig.' 1, and

'-'Fig; "6 is' a vsectional detail sub'tantially upon 30 the line of Fig: 1. p Y l In Figs; i2rand 3 ofthe accompanying' draw- Y ings,.the curtain "and Vstructure. embodying .the

present invention, isv shown as applied to the usual 35 Window frame including upright sides or'stile's I providing iways for sash frames 2, said window frameincludinga header 3 and sill 4; but it rwill l be understood that the 'present structure may be applied 'asV well toV any 'opening in a room wall, f0-

from` which room it is desired to exclude'the light,

said: structure including a rectangular frame of a size togiitcloselywithin the wall opening or window frame and be securedin place therein,

making tight joint therewith, all along the 5 topgfnottom and sides'of the opening. This frame Yprovides amounting for the curtain which is indicated as `a whole by the numeral Sand i'sV preferablyVA formed of :a iixiblel fabricY coatedr uponbothJ sides with ai suitable material to' make it 50A absolutely impervious toflight rays.

To'fhouse, hold and guide the side edges of this veuftain',jme z'man1 rectanguiar frames which is formed of; stock of rectangularform in cross sectiongfan'd Whicli-freme is ofthe-proper dimen- 55* sions to fit within the opening .to be closed by said curtain, is provided along its vertical side members, with inwardly projecting channels, by securing sheet metal strips 1 to opposed facesof each side member of the frame 6, rthese strips forming between them, an outer channel 8 along the frame member and an inner channel 9 which is open between the free innernedges of said strips, said channels being connected by a connecting neck portion I0 formed by depressing each strip inwardly toward the other along a longitudinal line with aclimited space between the walls ofthe neckrjust suflicient to permit the edge portions f ofthe curtain to Vpass therethrough and slide freely therein, the edge portions of the curtain being each formed with a hem IVI each extending into each of theouter channels 8.

The side edges of the curtain are thus guided by these channels and said hems are housed therein so that no ray of light may pass through any minute hole in the curtain formed by the needle in stitching the hem, and to prevent thev withdrawal of these edge portions laterally from either of said channels, a side guide rod I 2 extends longitudinally within each hem and within Yeach channel throughout the length thereof, each rod being loosely anchored at its lower end within the lower end of eachof said channels 8 by forming each rod with a head I3 connectedto ,its lower end by a reduced portion passing through a slot I4 in a bracket I5 secured to the frame 6. LThe curtain hemsy I I thus slide freely upon these rods as the curtain is raised or lowered, binding of the hems upon the rods being prevented by the loose anchoring of each rod at its lower end only, so that it may move laterally a limited distance under a pull exerted thereon by lateral pressure on the curtain, and this movement is limited by the rods in said hems, beingmoved thereby; to-

ward the neck portion I0 of each channel, said neck beingtoo narrow to permit the rod andhem to pass therethrough. The curtain is thus guided along each sideedge and each edge is so coniined in its channelthat it can not 'bewithdrawn from eitherchannel by lateral pressure on the curtain. Free sliding movement ofthe curtain upon saidrods is further insured and the lower end of the curtain connected to said rods by providing a short sleeve I6 slidable upon each rod and inserted in the lower end of each hem and secured therein by a suitable clamping member I1 embracing said sleeve and end portion of said hem, said sleeves being each formed with a laterally extending arm I8 passing through the neck portion Ivbetween the channels 8 and 9. and into `the latter where it is rigidly secured in any suitable manner to a draw bar I9 secured to and extending across the lower end of the curtain.A Y f within said channel-by a locking strip 22aboyeV the strip 2| and rigidly secured in place, Ycon-g ning saidv hem4 Within thec hannel so thatrno light ray can pass throughany holes formed by the needle in sewing the hem, and the lower end of Vthe curtain is rigidlyheld against pulling loose and is accurately guided.

In order to preventl any light raysrfrom passing around orV beneath said draw bar when the cur-f.

'tain is in fullyv lowered position, a sill channel 2,132,986 fl i member indicated as a whole by the numeral 23 is formed of sheet metal by securing the sheet metal forming the side walls of the channel firmly to opposite sides of the bottom cross member of the main frame 6 and to the lower ends of the side ways or channels which are received within the ends of said sill channel which is open at its upper side to receive said draw bar when the curtain is lowered to the limit of its movement, and therefore, as this' sill Vchannel is secured tightly against the Awindow sill, no light can pass, and to further preclude the possibility of any light jpassingaround the lower edge of the draw bar when within the sill channel, an outwardly projecting flange 24 is formed Yon Vthe upper edge of the outer wall of the draw bar channel to project Y Yover the upper edge of the outerwall of the sill channel 23, the outer kedge portion of this flange 24 being downturned asiat 25 at lessthan a right rangle to closely engage the said wall of the sill channelwithin the angle of said ange, and to further insure against the passage of light, the uper edge of the inner wall of draw bar channel is turned inwardly to form a flange 26 to project Vover the upper edge of the inner wall of said sill channel. l

As shown in the drawings,the curtain 4is shown as partly lowered with said draw bar held at a short distance above and out of the sill channel by a pull cord 21 passed around a pulley 28 anchored to the lower part of the inner wall of the sill channeLwith the freel end of saidA cord detachably held by a spring clip 29, said curtain'being held under spring tension tending to raise it, by se- Y curing its upper end edge to a spring actuated roller 30 extendingr across-the upper end of the main frame 6 and mounted at its ends inA bearings on'brackets 3| secured tosaid frame, said roller being of the usual curtain roller construction having the usual coiled spring 32 exerting a force tending to turn the roller in a direction to wind the curtain thereon. Y

To tightly enclose said roller 30 and curtain wound thereon so that no light can possibly pass, a sheet metal casing 33 extends across and is se? cured to the upper end of the main frame 6, said casing having top, back and end walls permanently secured to said frame and a front and lower side wall forming a detachable closure 34, the upper edge of which is engaged within a groove formed along the edge of the top wall t0y make a tight jointas at 35, and saidclo-sure is detachably held in place by screws 36 engaging openings in the outer ends of the brackets 3I. The upper ends'of theside guides each formed by the channels 8 and 9 .extend into and are rigidly secured at their upper ends within the ends of said casing whichV is thus. tightly closed except alongthe lower edge of said Aclosure which provides a slot through which the curtain passes, and thus all Alight is prevented from passing the upper end of thercurtain over said roller or around its ends.

A spring roller is shown for Winding the curtain thereon but it will be understood that any other suitable means may be employed for rais-` ing and lowering the curtain and holding it under tension when rlowered, and to guide the curtain to this roller, a roll of small diameter 31 is mounted within the casing and adjacent said entrance slot for the curtain. The curtain may also be quickly demounted for replacement or repair by removing the closure 34 and then demounting the roller 30 with the curtain wound thereon, slippingrthe hems II andfsleeves I6 from the upper ends of the guide rods I wZivvhich ends within channels and providing means having limited lateral movement within these channels upon which the curtain Ais .free to slide, for preventing the withdrawal of the curtain edges laterally from said channels under'pressure from the inside or outside upon the curtain, free movement of the curtain is insured and no cross bracing of the curtain is necessary.

Obviously changes in the construction, arrangement and combination of parts may be made without departing from the spirit of the invention and such changes are contemplated.

Having thus fully described my invention what I claim is l. A light excluding structure including a. frame to fit cl-osely within an opening and provided with inwardly open opposite side channels, the opposite side walls of each channel being bent inwardly to -form a narrow space therebetween, a flexible light impervious curtain within said frame with the opposite edges of said curtain engaged within said side channels of said frame, said edge portions of said curtain being formed with hems, and a guide rod withinY each side channel of the frame extending into said hems and upon which said hems are slidable, each of said rods being mounted atan end thereof for substantial movement in a lateral direction.

2. A structure of the character describedk including a rigid rectangular frame, sheet metal strips secured to opposite sides of the side members of said frame and forming inwardly o-pen channels, the side walls of each channel being formed inwardly to provide a neck portion outwardly from the open inner side of each channel, a flexible light excluding curtain having opposite side edge hems within said channels, a guide rod within each channel extending longitudinally thereof within the hem therein of a greater diameter than the width of said neck portion, each*V rod being anchored at its lower end by slotted engagement with a stationary member and having free limited lateral movement within each channel, and means to which one end of said curtain is connected for winding the curtain thereon and h-olding said curtain under tension. 3. In a structure for the purpose described including a rigid rectangular frame, sheet metal strips secured to opposite sides of the side members of the frame to form channels opening inwardly of the frame, each channel being con,

of said neck portions of saidY channels, a short sleeve slidable upon each rod and to which the lower `end of each hem is secured, a draw bar of channel form to receive the lower end of said curtain and within which said end of said curtain is secured, each of said sleeves having an arm extending inwardly through each of said side channels and secured to the ends of said draw bar, a rigid channel extending across the lower end of saidframe and open at its upper side to receive 'said draw bar' when the curtain is lowered, said draw bar having laterally extending anges to project over the upper edges of said end channel of the frame and close said channel.

4. A structure for the purpose described including a rigid rectangular frame having opposite vertical side members provided with inwardly open channels extending throughout a major portion of the length of said frame, a light impervious curtain within said frame having side edge portions projecting into said channels and tending across the lower end of said curtain and provided at each end within each side channel with a guide sleeve through which sleeves said rods extend, said sleeves being secured to the lower ends of said hems, a spring roller at the upper end of said frame and upon which said curtain is adapted to be wound, and a transverse member extending across the lower end of said frame to receive said draw bar when said curtain is lowered and enclose said draw bar and lower end of said curtain.

5. A structure for the purpose described including a rigid rectangular frame having opposite vertical side members provided with inwardly open channels extending throughout a major portion of the length of said frame, a light impervious-curtain within said frame having side edge portions projecting into said channels and formed `with longitudinal hems, arod within each side channel projecting into each of said hems for guiding and holding the curtain at each edge,

' a draw bar secured to and extending across the lower end of said curtain and provided at. each end within each side channel with a guide sleeve through which sleeves said rods extend, said sleeves being secured-to the lower ends of said hems, a spring roller at the upper end of said frame and upon which said curtain is adapted to be wound, and a transverse member extending across the lower end of said frame to receive said draw bar when said curtain is lowered and enclose said draw bar and lower end of said curtain, said transverse member including an upwardly open .channel and said draw bar being of channel form open upwardly to receive the lower edge of said curtain, said draw bar having laterally extending anges for engaging over the upperedges of said transverse channel when said draw bar enters said latter channel upon the lowering of said curtain.

- LOUIS F. JULIEN.

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