D. W. TROY. APPARATUS FOR ADVERTISING. APPLIOATION FILED JAN.31, 1911. 1,004,503.. Patented Sept. 26, 1911.

WI TNESSES: gig i / UNITED ‘STATES PATENT OFFICE. DANIEL W. TROY, OF‘ MONTGOMERY, ALABAMA.

APPARATUS FOR ADVERTISING.

1,004,503. _ Speci?cation of Letters Patent. Patented Sept. 26, 191 1. Original application ?led November 12, 1910, Serial No. 582,117. Divided and this applicatiom ?ied. January 31, 1911. Serial No. 605,820.

‘ To all whom‘ it may concern: that a. light substantially ultra-violet in Be, it. known that I, DANIEL W. TnoY, a character answers perfectly and therefore citizen of the United States, and a resident preferably employ the simple screen of co of the city and countyof Montgomery, balt glass which is not entirely opague to State of Alabama, have invented certain visible light. The small proportion 0 dark 60 new and useful Improvements in Apparatus blue or violet light which passes the cobalt for Advertising, of which this is a speci? glass is in no wise a detriment. More ex cation, reference being bad to the accom pensive screens could be employed but I find panying drawing. . satisfactory results from cobalt glass. It 10 This invention relates to advertising dis~ will be understood, however, that the in 65 plays wherein the light of ?uorescence pro vention may be carried into effect with any duced by ultra-violet excitation is em suitable source of ultra~viclet or substan ployed. , ' tially ultra-violet light. As an illustration ‘ ‘ The invention is subordinated to the of a modification of the illuminant see Fig. 15 method described and claimed in my appli ‘l- to be described. I merely provide efficient 70 cation, Ser. No. 592,117, ?led Nov. 12, 1910, means for producing the fluorescence, and method for advertising, from which this the type of the source of ultra-violet rays application is a division. is largely a matter of convenience. The object of this invention is to provide I may form the ?uorescent characters, de 20 novel and‘ efficient means for producing at signs, or ornamental parts of the sign or 75 small expense highly attractive illuminated display apparatus in a variety of ways. I ‘or rather luminous advertising displays, may employ uranium glass, silicate of zinc, such as signs, through the use of ?uorescent platino-cyanid of barium (although rather‘ material. too expensive), calcium tungstate, and a 25 In the drawing, Figure 1 shows a typical' variety of other substances which‘mayvbe'i 80 reduction to practice, such as I employ in had in a powdered or crystalline form and a slmple case; Fig. 2 shows a modi?cation which ?uoresce brilliantly. These I may of the manner in which ornaments or char- apply in the shape of a mint mixed with or' acters may be formed; while Figs. 3 and 4 adherent to a binder. ce Fig. 2, in which 30 show modi?cations of the means for excit I show a part of a sign 1, having a character 85 ing by substantially ultra-violet light. 7 so applied. The invention is carried into effect by Fig. 3 illustrates the preferred manner of forming the characters, ornaments and the arranging the source of substantially ultra like, of an advertising display or sign violet excitation so as to obtain the maxi 35 wholly or in part only of ?uorescent ma mum excitation with a given source of light. 90 terial, and then providing means to excite Obviously, a reflector of some form will ac such material so as to cause it to ?uoresce complish this end; I therefore provide such ‘and become self-luminous. It will be under re?ecting means, preferably of substantially stood that the invention permits of highly or‘ approximately parabolic form, although 40 attractive effects which will be of great not necessarily so. See, for example, the 95 value for the purposes intended. re?ector 11, partly broken away to show the In the typical illustration of Fig. 1 I are 5 within and closed at the front by a show a sign 1, upon which are characters 2, medium such as described capable of allow 2, 2, (which, obviously, may be of any de ing substantially no visible light- to pass 45 sired number or arrangement), and, if de but fairly transparent to ultra-violet light. 100 sired, various merely ornamental objects or The nature of the screen 12 is capable of representations, formed of ?uorescent ma modification. As said above cobalt glass an terial or coated therewith. By means of a swers very well. A further absorption of support 3 a source of substantially ultra visible light may be had with cobalt glass .Violet light 4 '(in this case an arc' lamp 5 coated with nitrosodimethylanilin and there 105 screened by a deeply colored cobalt glass are doubtless other screens which might be globe or shade 6) is held in proper position employed but for ordinary advertising to strongly illuminate (or rather, excite) purposes I ?nd the plain cobalt glass, par the ?uorescent characters, etc., of the sign ticularly if deeply colored, answers per 55 with substantially invisible light. I ?nd fectly——the deep blue or violet visible light 1,004,503

not only causing no diminution of the e?’ect ultra-violet light” as used herein is used but actually- increasing the beauty of the dis to mean and include not only a pure ultra 35 play‘ by .the contrast of back-ground and violet light, it such can be had, butany ?uorescent ?gu're._ ‘As several types of vapor light sufficiently ultra-violet in character to lamps,?such as the Hewitt mercury vapor produce effective fluorescence and not con lamp, are very‘ e?icient radiators of ultra taining enough visible rays to mask the violet‘ light I may sometimes employ them ?uorescent» etteet. A wide range of proper 40 to advantage in lieu of the are. For such tions of the two kinds of light. is obviously use I may arrange means as shown in Fig. possible.‘ Having described my invention, what I 10 4; a lamp of the type mentioned being shown at 13,- within a suitably shaped re claim is :— ?ector 14, closed by the absorber (sheet of -1. In apparatus of the class described, a 45 cobalt glass, for example) at 15. sign provided with characters formed of Obviously, highly attractive effects can be ?uorescent material, an arm extended be secured by making letters, characters, and yond the face of such sign, a source of light 15 ornamental members integrally independent supported by such arm, and a screen be of the back-ground of the sign. For exam tween sueh source of light and such ?uor 50 ple see the letters I N N of Fig. 1, which are escent material substantially transparent to separately formed, either of uranium glass ultra-violet light and substantially opaque to visible light, substantially as set forth. 20 or some other material, wood or metal, perj haps, coated with a ?uorescent material: 2. ln apparatus of the class described, an Signs of great beauty and high attractive advertising display having a design thereon 5a capacity can be thus built up of solidly delineated in a ?uorescent material, and a formed characters of uranium glass, etc. source of substantially, ultra-violet light supported near and arranged to excite such 25 No attempt has been made to more than indicate the various modi?cations which material, substantially as set forth. can be made in details and sign design and "Witness my hand this 27th day of Janu all of which lie rather Within the scope of ary, 1911. the. artistic sign constructor, for it Wlll be DANIEL W. TROY. 30 evident that the invention can be carried out in its essential elements in an enormous In the presence of—~ variety of displays of this character. It will DAISY Jonas, be understood that the term “substantially CHARLES H. SCOTT.