US2350617A - Black-out device - Google Patents

Description

June 6, 1944. J. E. JOHNSON BLACK-OUT DEVICE Filed April 7, 1943 a sheets-sheaf ATTORNEY Jeromg 5 ublmson.

Patented June 6, 1944 UNITED STATES iia'iEN'i" orrioe BLACK-OUT DEVICE Jerome E. Johnson, New York, N. Y., assignor to Tension Envelope Corporation, New York, N. Y., a corporation of New York Application April 7, 1943, Serial No. 482,201

(01. rec-9c) 12 Claims.

This invention relates to black out devices particularly for covering panes of windows and the like to prevent escape of light rays from an interiorly illuminated building, and has for its object to provide a simple and inexpensive device which is extremely effective when a black out is necessary and which may be readily adjusted to admit daylight into the building when desired.

Other objects are to provide a pane covering device capable of construction from a material available during time of war such as paper, fiber sheets or the like; to provide black out devices wherein'slide members thereof may be left in position during daylight hours to serve as a sign; and to provide a blackout device that serves to support the glass in case of breakage.

In accomplishing these and other objects of the invention, I have provided improved structure, the preferred form of which is illustrated in the accompanying drawings, whereint.

Fig. 1 is a perspective view of the inner face side of a black out device constructed in accordance with the present invention. 7

Fig. 2 is a similar perspective view of the outer face side of the device. v

Fig. 3 is a view of the parts of'the black out device illustrated in spaced relation, the slide supporting member being shown partly folded.

Fig. 4 is a perspective. view of a portion of. a window showing one pane on which the opaque sealing material is applied, ready to receive a black out device; another pane .covered by a black out device with the closure slide in place; another pane with the envelope-like slide support in position with the closure slide removed; and another pane with the closure slide being inserted into the envelope-like support thereon.

Fig. 5 is a fragmentary. perspective sectional. v1ew through a. portion of the window and anv illumination to carry on the work in-whieh they.

may be engaged, and therefore some means is required to prevent escape of light rays from they interior of the building. Lam aware that various forms of black out devices are in use for such purpose but they are high in price, difiicult to install, and do not make a complete black out.

In carrying out the presentinvention, I provide a'simple and inexpensive black out device 1 formed of opaque fiberboard, paper, or paper-like material suitably colored to absorb light and having sufficient body to retain its shape. The device I includes an envelope-like supporting structure 2, folded from abl'ank 3 having shape to provide front and back portions dand 5, sealing flaps Sand 1, and a closure flap 8. The flaps '6, l and 8 are preferably formed on the front portion 4 with the flap 8 located on'the side opposite a line of fold between the front and back portions so that when the back portion is folded to overlie the inner face ofthe front portion, the sealing flaps '6' and 1 may be folded over and sealed to the outer face of the back portion to form a pocket 9 having an insert opening It coextensive witht'he closure flap 8. The front and back portions are of a shape and size so that the folds ll, l2, l3 and I4, which constitute the edges of the envelope-like structure fit closely against the side faces of'the mullions C or portions of the window frame when the device is applied. over the inner face of a pane D, as later described. 7

In order to admit light, when desired, the front and back'portions have openings 1 5 and Is therein of a size to leave a considerable marginal frame H but which are capable of passing the necessary amount of light during daylight hours. Insertable into the pocket-like frame is a sliderlil of a size and shape closely following themember 2 so that the side and end edges l 92fi and ill-22 closely engage within the folds I l|2 and l3l4 to cover the openings l5 and i6 when a black out is necessary. there being sufficient overlap by the margins. of the, frame to trapany light rays that might tend to leak around the edgesof the slide. The slide is preferably; formed of the samematerial' as the member 2 .so that it does not reflect light rays. The corners thereof are also preferably rounded to facilitate insertion of the slide. H V j In order to retain the slide, the closure flap is preferably provided with a string or flexible tie 23 that has oneend attached thereto by a button 24 and is adapted to extend across the inner opening so that the opposite end may be wrapped about asimilar button 25.

In applying the black out devices, the inner face of the marginal portions of the panes D are painted with a non-reflecting opaque adhesive 25, which preferably extends around the edge faces of the mullions as indicated at 27. The devices are then pressed against the window panes so that the outer marginal edges seal firmly thereagainst. When thus applied and with the slides in place, the panes are completely covered so that light rays from the interior of the building inserted by sliding them through the insert openings H), with the closure flaps 8 serving as guides for facilitating entrance of the edges into the insert opening. The slide is pushed into position within the envelope-like frame and the closure flap 8 is folded against the adjacent marginal edge of thebackportion 5. Thestring is then pas'sed'across to the opposite side and the free end is wound once around the button 25.

In cases where it .is not necessary to remove allthe closures 'or slides l8 in admitting daylight, thosethat are left in position may have the exterior sides printed with'letters as indi cated at 28 so that' they may be used as signs during-daylight hours.

'While I have particularly illustrated a string tie for thev closure flapyit is obvious thatother types of fasteners might be substituted therefor without departingfrom the spirit of the invention; Itis also possible to'omit the fastener and tuck the flap into the insert opening if desired.

From the foregoing it is obvious that I have provided a very efflcient black out device which is inexpensive to produce and may .be constructed in large quantities on present'envelope manufacturing machines. It is also obvious'the devices are easily applied to thepanes of a window and arereadily manipulated to admit exterior light or toeffect, a blackout.

What Iclaim and desire to secure by Letter Patent is: I I

1. A'black out-device including, a supporting member adapted to be attached in covering relation to a'window pane andvhaving an openin therethrough forpassing light, and a closure for andin said o ening and removable from coveringrelation with said opening of the sup portingmeznber i 2. A blackout device including, a slide supporting member adapted to be attached in covering relation to a window pane andhaving an opening therethrough for passing light, a slide mounted in said supporting member to close said opening and removable from said openingyand means for -positively retaining the slide in closing position. v r g 3. A black out device for window and like openings including. an envelope-like support n frame having an insert opening at a side edge thereof and having light passing'openings in the respective sides thereof adapted to be re istered with a window opening, and a closure for said openings insertable into the envelope-like sun porting. frame through said insert opening for covering the window opening- 4. A black out device including, an envelopelike supporting frame having front and back portions provided with registering light passing openings in said portions, and a closure movable within. the envelope-like supporting frameto cover, said light passing openings.

5. A black out device including an envelopelike supporting frame having front and back portions and provided with an insert opening at a side edge thereof said front and back portions having registering light passing openings therein, a slide in the envelope-like supporting frame and movable through the insert opening to uncover said light passing openings, and a closure flap for said insert opening to retain said slide in opening closing position.

6. A black out device including, an envelopelike supporting frame having front and back portions and provided with an insert opening at a side edge thereof, said front and back portions having registering light passing openings therein, a slide insertable into the envelope-like supporting frame through said insert opening, a closure flap for said insert opening to retain said slide, and means for retaining the closure flap in closed position.

7. A black out device including, an envelopelikesupporting frame having front and back portions and provided with an insert opening at a side edge thereof said front and back portions having registering light passing openings therein, a closure insertable into the envelope-like supporting frame through said insert opening, a flap for said insert opening to retain said closure, a button onsaid flap and said supporting frame respectively, and a flexible tie fixed to one of said buttons and having removable connection with the other.

8. In combination with a frame and a transparent pane carriedby said frame, an adhesive of opaque properties applied'to margins of the pane, a black out device including a member covering the pane and having sealing contact with the adhesive, said member having an opening therethrough for passing light, and a removable closure member for said opening.

9. A black out device including, an envelopelike supporting frame having front and back portions provided with an insert opening at a side edge thereof, said front and backportions having registering light passing openings therein, a slide movable in the envelope-like supporting frame through, the insert opening to cover said light passing openings, a closure flap-for'said insert opening to retain said slide, buttons on said closure flap and said supporting frame, and a flexible tie fixed to one of said buttons and having removable connection with the other.

10. In combination with a frame and a transparent pane carried by said frame, an opaque adhesive applied to margins of the pane, a black out device including an envelope-like structure covering the pane and having sealing contact with the adhesive, said device having openings for passing light, and a slide insertable into said enveiope-like structure to close said openings.

11. In combination with a window having a transparent window pane, an envelope-like structure covering the pane and having openin s for passing light, a slide removably supported in said envelope-like structure, and means securin

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