US2212793A - Antidazzle device - Google Patents

Description

Aug. 27, 1940. wiREX 2,212,793

ANTIDAZ ZLE DEVICE Filed June 5, 1939 Patented Aug. 27, 1940 .5; VENT OFFlCE Walter James Rex, Hatch End, England Application June 5, .1939, Serial No. 277,545 In Great Britain September 13, 1937 2 Claims. (Ci. 40-132) This invention seeks toprovide an improved of course arranged horizontally. The block of antidazzle device for a lamp, and may be said laminations 9 is received within the carrying to consist in an antidazzle device comprising one frame composed of the guides I5 and [6 which or more sections of closely-disposecl thin glass are attached to the casing at the forward ends UNIT 5 or other transparent parallel strips placed edgeand have their inner, ends turned over, as inwise with respect to the light source, said strips dicated at H, to serve for retaining the block having at least one surface ground or similarly and such other members as may be used theretreated so that direct projection of light takes with, as will be referred to .later.

place only through the edges of the strips with In addition to the block of laminations 9,

10 no appreciable reflection off or projection there are illustrated in Figure 2 further transin through the ground surface or surfaces. parencies i8, i9 and 20 which are receivedwith- The invention further contemplates placing in the guides and I6 behind the block of behind an antidazzle device such as that imlaminations. The-front transparency may inmediately-above described certain other transelude written matter appropriately placed there- 15 parencies; for instance it has been found that on and may in some cases be ribbed vertically where the laminations of the previously-proor horizontally to assist in directing the light acposed glass extend horizontally, the provision cording to requirements. The transparencies l9 behind that glass of a further sheet of glass with and 26 may be variously coloured; for example Vertical ribs or laminations tends to spread the the transparency l9 may be red and the translight laterally without any tendency to increase parency 28 green, which two colours in com- 20 the spreading upwards or downwards. Again, bination have been found to produce a light certain coloured glasses have the eifect of dimwhich is practically invisible from any point ming the light, considerably so as to render it outside the very limited angle through which practically invisible from any point out of the the matter displayed by the sign can be seen.

useful plane of illumination. For illumination of'the matter of the trans- 5 In the accompanying diagrammatic drawing parency Hi, there is provided a bulb 2! which forming part of this specification and in which derives its source of current from a battery Ma like numerals are employed to designate like in the box It. The bulb conveniently is mounted parts throughout the same: on the horizontal wall 22 which separates the Figure 1 is a perspective view of one of the light chamber it from the battery box M. The 30 glass strips used in the antidazzle device; adapter 23 in which the bulb 2| is carried is Figure 2 is a sectional side elevation illustratpreferably supported upon rods 24 so that it can ing an illuminated sign employing an antidazzle be raised or lowered to get various desired redevice and in addition certain other transsults.

parencies for purposes which will become ap- There may be provided a reflector as indicated 35 parent from the following description; while at 25 the purpose of which is to reflect light Figure 3 is a sectional side elevation similar to through the display panel of the sign, and the Figure 4 but illustrating a modified and more reflector may be adjustable; although generally simple form of sign. I speaking it will not need to be adjusted once ur 4 is a detail plan view better showing it has been erected in the desired position. For 40 the p unt for s pp rt n nds of the effecting the initial adjustment, the reflector 25 reflector. is located by metal clips 26 and 2? adapted to be Referring now to the drawing the casing l2 turned up to engage the refl t in position is dividedinto a hollow top part providing across the top corner of the casing when it has *5 lamp chamber 13 and a hollow bottom part M for accommodating a battery. The lamp chamber 13 has an opening which is closed by a block made up of transparent laminations 9, as shown in Figure 1, preferably having both faces ground f fi mth rtefitence it b as indicated at I I in Figure 1. In addition the e anangemen s m lgure a een ground surfaces are preferably coated with dull devlsed as S1g n Wh1ch Partliularly black paint or adhesive before being placed tos F provldmg an Ffi luumlmf'ted gethen The object of the present f m f the sign visible under all conditions of the required invention being to spread the light laterally with- I normal use but p actically invisible outside the out projecting it upwards, the laminations 9 are required normal field of view. Thus, such an il both of the clips 26 may extend from a plate which is adjustable along a guide 28, as shown been properly located. For adjustment one or 45 g luminated sign may be particularly useful, for instance, during air raids.

As shown in Figure 2, the arrangement has only a front display panel and on the back of the casing there will generally be provided bands 30 by means of which the casing can be attached to a standard or post. If there are four display panels, one on each side wall of a rectangular casing, the casing will then either be supported on the top of the post or directly upon the ground and arrangements for securing it will then be made accordingly.

Although in the Figure 2 arrangement it has been preferred to illustrate the sign as a selfcontained apparatus including a battery, the battery box may be dispensed with and the bulb 2| then illuminated from some available source of current.

The arrangement illustrated in Figure 3 merely serves to show a very much more simple form of illuminated sign working on the same principle as that illustrated in Figure 2. The casing 3! in shaped to fit the block of laminations 9 arranged in the same way as those of the display panel in the Figure 2 arrangement, and the back of the casing is curved, as shown at 32, for the reception of a curved reflector 33 secured to the casing in any convenient manner. The block of laminations is backed by the transparencies l8, l9 and 20 as described with reference to Figure 2. If the display panel should happen to be round when viewed from the front, the ribs of the transbehind the laminations the reflection is very considerably deadened. Again, in another case yellow glass may be used behind the laminations and blue glass in front.

What I claim is:

1. An illuminated sign including a casing, a wall dividing the casing into a, hollow top part and a hollow bottom part, said hollow top part having an opening, a reflector carried in the hollow top part on the top and rear walls and opposite the opening, means for adjusting the reflector to difierent angles with respect to the opening, guide members surrounding the opening in the hollow top part, transparent strips mounted in superposed face to face engagement between the guide members and having corresponding edges presented to the opening, a display element behind the strips, an adapter, a light bulb mounted on the adapter, a source of current in the bottom part, and connections between the source of current, the adapter and the light bulb, said bulb being energizable by the source of current for projecting beams to be reflected by the reflector to project through the transparent strips for providing illumination and said adapter being operable for shifting the bulb with respect to the reflector and opening.

2. An illuminated sign including a casing, a wall dividing the casing into a hollow top part and a hollow bottom part, said hollow top part having an opening, supporting means for the casing, said hollow top part having a top wall and a rear wall, guides on the inner surfaces of the top Wall and rear wall, adjustable clips slidably mounted in the guides, one of said clips being mounted on the top wall and the other of said clips being mounted on the rear wall, a reflector carried in the hollow top part and extending between the clips, said clips being shiftable for adjustably mounting the reflector in the hollow top part, guide members surrounding the opening in the hollow top part, transparent strips mounted in superposed face to face engagement between the guide members and having corresponding edges presented to the opening, a display element behind the strips, a source of current in the hollow lower part, an adapter mounted on the wall, alight bulb carried by the adapter, and connections between the current source and the bulb, said bulb being energizable by the source of current for projecting beams to be reflected by the reflector to project through the display element and transparent strips. I

WALTER JAMES REX.

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