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Publication numberUS1520729 A
Publication typeGrant
Publication dateDec 30, 1924
Filing dateDec 4, 1922
Priority dateDec 4, 1922
Publication numberUS 1520729 A, US 1520729A, US-A-1520729, US1520729 A, US1520729A
InventorsStoewsand Frederick J
Original AssigneeTwin Electric Sign Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Illuminated sign
US 1520729 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Dec. 30, 1924.


Mmmm@ uw I e :11 x1 IHWMMMWHW Patented Dec. 30, 1924.




Application filed December 4, 1922. Serial No. 604,701.

To all whom it may concern:

Be it known that I, FREDERICK J. S'roEw- SAND, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in an Illuminated Sign, of which the following is a specifica* tion.

This invention relates particularly to an illuminated sign for advertising purposes, and the principal object of the invention is to provide a new and improved sign of this kind in which changeable screens can be used in connection with a display box, and lights to illuminate the screens to produce different effects depending upon which screens are illuminated. A further object of the invention is to provide improved means for illuminating the screens or a partially transparent back ground therefor. A further object is to provide an improved container for the illuminating apparatus from which the screens are easily removable. Other objects will appear hereinafter.

In the accompanying drawings, Fig.. 1 is a perspective of a cabinet or container illustrating a. combination of signs displayed thereby; Fig. 2 is a sectional view taken on the line- 2 2 of Fig. l; Fig. 3 is a plan section taken on the line 3 3 of Fig. 1; and Fig. 4 is a detail of one of the screens.

In carrying out this invention a plurality of screens are provided each of which is painted or prepared on one side with a material which will not clo or fill up the screen but which will be disp ayed or made visible by a light shining on the coated portion of the screen. When the light appears back of the screen the coated portion thereof will not be visible, and the. letters or figures on the face of the screen will only be visible from the front when this face is illuminated. Screens of this kind may be utilized alone, in combination with others of the same kind, and in connection with a back ground illuminated either as the screens themselves are or through the back of a partially transparent back ground, the transparent parts admitting light therethrough to display any sign or image desired.

Referring now more particularly to the drawings, a box or display lcabinet 1 has a" window aperture 2 at the front in which a glass 3 may be inserted. At one end it is open and provided with a lslide 4 which can be raised from the top for withdrawing screens 5 and 6 and replacing them with others of the same kind. Each screen is mounted in a marginal frame 7, and the frame is slidable upon guides 8 at the top and bottom, the corresponding edges of the frames 7 being provided with grooves for receiving the 'guides 8 so that the screens will be held in their proper places.

,Each screen may be coated or prepared as indicated in Fig. 4 by having letters 8, characters or scenic effects painted upon the outer face of the screen so that'when viewed under sufficient light, the letters or characters `will appear perfectly plain to an observer. The mesh ofthe screen is not clogged or filled with the paint so that if a light appears behind the screen the painted designation or characters on the front of the screen will not be visible and the illuminated part behind the screen will shine through without obstruction, except that of the screen itself. If desired, a portion of the screen may be omitted entirely, as indicated in Fig. 4.

Behind the screens a back ground 10 -is usually provided which is made of glass or. other transparent material coated with paint or some other substance which is not transparent, or only partially so, in order that the desired design ation will be displayed thereby when a sufficient illumination is rovided behind the back ground. A simi ar back ground may also be provided on the inside of the back 11 of the container itself by painting or the like in such a manner that the designation thereof will appear perfectly clear if it is sufficiently illuminated. In such a case the back ground 10 must be prepared with a view of displaying the matter on the back 11 if it is so desired. As shown, the back ground 10 su ported by a marginal frame 12 is attache to the rear side of the frame supporting the screen 5.

In order to illuminate the screens a plurality of electric lamps 13 are disposed at the 100 top and bottom of thecontainer 1, and eX- tending partially around these lamps are reflectors 14 which confine the rays thereof as nearly as possible to the front of the screen which they are'intended to illuminate. 105

nation on the back 1l, additional lamps and 110 reflectors are provided for illuminating it as well in the same manner.

v In operation, the screens and 6 and the back ground are prepared with a view of separately displaying some features or word-7 ing which can be seen by an observer, and usually with a view of supplementing or coordinating with the matter upon the other have some entirely different matter visible at all times included upon one of its surfaces. The lamps 13'are so connected that the back ground 10 or either of the screens 5 or 6 may be illuminated alone; or all of any two of them may be illuminated together. In practice it is usual to have the background 10 illuminated first, then to add the screen 5 and subsequently the screen 6, then to allow all to become dark, starting all over again.' Any variation of this, well known to those in the sign business, may be employed without departing from the spirit and scope of the invention. The screens and back ground may be removed and changed or varied asy desired, leaving the position of the container 1 the same. The container maybe made in large sizes suitable for out door display or it may be in small sizes for Window or counter display, The variation of the lighting of the separate screens or back ground is accomplished automatically by means well known in this art.

I claim:

1. In a sign of the class described, the

combination with a plurality of-foraminated screens, of coating material applied to one 'face of each of the screens and visible from one side thereof but not clogging the screens, an illuminated back ground behind the screens, and means at the edges of the screens and invisible from the front of the sign for separately illuminating the face of each of the screens. y

2. Ina sign of the class described, a receptacle having a front window, a slide at one end and guides at top and bottom parallel with the window, of, a plurality of oraminated screens removably slidable into the container upon the-guidesmeans on the face of each screen for forming letters or characters thereon without clogging the screens, a partially transparent back ground behind the screens, and means at the margins of the screens and invisible from the front of the receptacle for illuminating the back ground and the front faces of the screens separately so that the back round and an illuminated screen is visible tlirough the screen in frontl of it without displaying the matter upon the screen which is not illuminated.

3. In a sign of the class described, thc combination with a plurality of foraminated screens, of coating material applied to the outer face of each of the screens and visible from this side thereof but not clogging the screens, an illuminated back ground behind the screens, means at the edge ofthe screens and invisible from the front of the sign for separately illuminating the outer face of` each of the screens, and means forming a transverse guide upon which the screens are slidable for separately removing them from the sign.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4279088 *Nov 15, 1979Jul 21, 1981Hyre Robert WVisual stimulation apparatus useful in therapeutic treatment
US5251392 *Feb 8, 1991Oct 12, 1993Vemco CorporationArtificial window
US5253051 *Mar 5, 1991Oct 12, 1993Mcmanigal Paul GVideo artificial window apparatus
US6667576May 31, 2000Dec 23, 2003Berthold WesthoffOptical-effect light
WO2000075909A1 *May 31, 2000Dec 14, 2000Berthold WesthoffOptical-effect light
WO2002043038A2 *Nov 23, 2001May 30, 2002Berthold WesthoffEffect light
WO2002043038A3 *Nov 23, 2001Aug 8, 2002Berthold WesthoffEffect light
U.S. Classification40/442
International ClassificationG09F13/00, G09F13/08, G09F13/02
Cooperative ClassificationG09F13/02, G09F13/08
European ClassificationG09F13/08, G09F13/02