Патент USA US2071239код для вставки
Feb. 16, 1937. > w. H. SPENCER ET AL ' ' 2,071,239 SIGN PLATE AND OTHER ORNAMENTAL PANEL '7 Filed March 15, 1955 INVENTORS WILLIAM 'H. SPENCER LESLIE R. BIRDS/ILL WILLIAM BAHLER ' 2,071,239 Patented Feb. 16, 1937 UNITED STATES PATENT OFFICE ' 2,071,239 SIGN PLATE AND OTHER ORNAMENTAL PANEL William H. Spencer, New York, Leslie R. Birdsall, , Long Island City, and William Bahler, New York, N. Y., assignors to The Frink Corpora tion, Long Island City, N. Y., a corporation of Delaware Application March 15, 1935, Serial No. 11,222 7 Claims. (Cl. 40—136) This invention relates more especially to signs constructed of plate glass or other suitable transparent or translucent material whereby novel lightv effects as well as contrasts in the characteristic appearance of a legend or design with respect to its background, may be produced in ornamental panels or signs. _ The primary purpose of our invention is to provide‘ plate‘ glass signs of'improved construc 10 tion and for this purpose, our invention contem plates more especially a re?nement and exten sion of the method shown and described in U. S. Patent No. 1,525,107 which was granted in the name of W. H. Spencer under date of Feb lens-like bodies of glass which stand out in bold relief from a background of contrasting non luminous character and in which the basal out lines of the luminous side walls of the lens-like bodies are sharply de?ned from said background. In the drawing which illustrates an adaptation of our invention to a plate or block of colored ?ashed glass, successive stages of the process are represented by effects produced on a fragmen tary portion of the plate glass as shown on‘ a 10 fragmentary transverse section on the line A-—B of Figure 6. Figure 1 is a fragmentary vertical section of ruary 3, 1925, the purposeof the present inven 15 tion being to form protruding lens-like bodies of the plate glass panel prior to the excavating oper ation, said panel being provided with a ?ashed layer of colored glass at the top. translucent or transparent material which stand out in strong relief with respect to a background portions of the glass plate have been excavated of contrasting character. According to the em bodiment of our invention shown on the draw 20 ing, an excavating operation (preferably per formed by sand blast) is utilized to form a de sign, letter or legend out of solid bodies of glass which protrude in bold relief from a roughened temporary surface left by the sand-blasting 25 operation. For this purpose, a resist sheet is ?rst applied to one surface of the panel and after portions of said resist sheet have been cut away around and exterior to portions of the smooth polished surface of the plate glass which 30 are to form the top or forwardly-presented sur faces of the design, letter or legend, the sand blast is appliedto the outlying areas of the plate, glass to form portions of relatively lesser thickness which correspond to background areas for the 35 solid glass characters formed by other portions of relatively greater thickness or degree of relief. According to the above identi?ed Spencer Patent No. 1,525,107, this step in the‘process was fol lowed by an electroplating operation which cov 40 ered the beveled side wall surfaces of the relief Figure 2 is a view similar to Figure 1 after by sand blast over predetermined areas of one face to form lens-like characters in relief with concave bevelled side walls of roughened glass. Figure 3 is a view similar to Figure 2 showing a step in the process preliminary to the electroplat~ ing operation, Figure 4 is a view similar to Figure 3 showing the partly ?nished sign in readiness for the elec troplating operation. Figure 5 is a view similar to Figure 4 of the completed sign plate. Figure 6 is a face view of a portion of the completed sign plate. According to the preferred embodiment of our invention shown on the drawing, a slab l of plate glass is covered by an applied sheet 2 of resist having an adhesive incorporated therein so that 35 when the initial blast of sand strikes thereon, a protective layer of sand is formed for de?ecting the sand blast from the resist during the con tinued action of the sand blast. Assuming that a plate glass sign having the appearance shown 40 in Figure 6 of the drawing, is to be produced, characters as well as the roughened background portions of the resist sheet 2 are cut away around and exterior to portions of the plate glass sur from which the characters protruded. In con sequence, the luminous and illuminating effects face which are to form the top smooth surfaces in the beveled edges of the solid glass charac - of the letters shown in Figure 6. The prepared slab is now ready for the sand-blast operation 45 ters due to their inherent properties of re?ec which is directed upon the slab in such a manner tion, refraction and diffusion of light, could not be utilized under the Spencer method which as to excavate portions 4, 4, of the plate glass provided no means for establishing a clearly de ?ned border between the flat plated areas and 5 O the beveled non-plated areas. 'By painstaking 85 slab extending around and exterior to the ?nished relief characters. As a. result of this sand-blast 50 experiments and investigation, we have found that ornamental panels of the character re ing operation, the plate glass slab is reduced to the form shown in Figure 2 of the drawing, in which protuberant bodies 5 of solid glass form-letters ferred to, can‘be made highly distinctive in ap pearance by forming letters or other designs of cave side walls of roughened glass due to the 55 or other characters provided with bevelled con 2 . 2,071,239 etching operation. For the purpose of safeguard ing the light-transmitting, light-reflecting and light-diffusing properties of the translucent side walls of the relief characters during subsequent operations on the plate glass slab, the bevelled side walls are temporarily covered by layers of suit able composition such, for example, as a gelatine and glue preparation which provides a protective covering for the ground glass surfaces and pre 10 vents access thereto of the conductive coating so lution employed for depositing a layer 8 of graph ite, metallic paint or silver etc. on the background areas in preparation for an electroplating opera tion. As shown in Figures 3 and 4 of the draw ing, the protective layers 6 terminate outwardly at the bottom in alinement with a rectangular re cess '! which sharply de?nes the basal outline of the letter from the depressed roughened back ground area upon which the conductive coating 8 is deposited. During the electroplating operation a layer 9 of metal becomes deposited on the con ductive layer 8, as indicated in Figure 5 of the drawing. The ?nished plate glass sign comprises an electroplated panel provided with protuberant “ uncoated bodies of solid glass which form letters or other characters in bold relief. Moreover, these characters in relief are provided with smooth flat top surfaces consisting of residual portions of the original polished surface of the plate glass, and roughened beveled side walls, and by virtue of their inherent properties of re ilection, refraction and diffusion, produce strik ing ornamental effects in contrast to the metal lic or opaque background from which they stand out. Especially beautiful effects may be obtained by means of a slab of plate glass embodying a layer la of ?ashed glass of any desired color at the top. Not only is the ?nished sign plate pro duced by this method a thing of striking beauty ~10 but its construction is rendered permanent due to the durable qualities of the substantially ?at background consisting of an electroplated area on a roughened surface and the solid glass lens like bodies protruding therefrom. By an inspec ' tion of Figure 5 of the drawing, it will be seen that the concave perimetral walls of the relief characters are curved continuously from the ?at surfaces of said characters and outwardly and rearwardly therefrom into approximate parallel ism with the common plane of said ?at surfaces, the forwardly extending marginal portions of the concavely bevelled roughened side walls being approximately normal to said common plane at the flat surfaces of the plate glass portions of relatively greater thickness. Furthermore, the basal outlines of the relief characters are sharply de?ned from the electroplated background by the shoulder ‘I against which the metal plate of the background abuts. In consequence, with one or more sources of light arranged in the rear of a sign plate constructed as described above, and in relation to a given superficial area of the polished ?at surface of each letter, a relative ly much enlarged light aperture is provided be tween the spaced edges of the plates 9, 9, through which the light rays strike the roughened con cavely bevelled walls from within at progres sively different angles from the basal margins of the lens-like bodies of glass to the ?at surfaces at 70 the top. Due to the provision of co-ncavely bev elled roughened side walls on a letter having a flat polished surface, a two-tone lighting effect is produced. Furthermore, the substantially con tinuous curvature of the bevelled side walls from 75 a direction normal to the polished front surfaces of the characters at said front surfaces into par allelism with said surfaces at the base of said bevelled side walls, produces variations in the re?ection, refraction and diffusion of light rays corresponding to the curvature of the side walls which are rendered progressively brighter from relatively small cross-sectional areas at the flat faces to much broadened cross-sectional areas framed within the opaque background. We claim:— 10 1. An ornamental panel constructed of light tra-nsmitting material and having portions of relatively lesser uniform thickness and other por tions of relatively greater uniform thickness pro vided with concave perimetral walls having their forwardly extending marginal portions approxi mately normal to the front surfaces of said por tions of greater thickness, said walls being curved continuously and rearwardly into approximate parallelism with said front surfaces in a common 20 plane spaced rearwardly from said front surfaces, and an opaque background covering said por tions of lesser thickness and having its forwardly presented surface disposed substantially in said I common plane. L. Ll 2. A sign plate constructed of light-transmit ting material and comprising portions of rela tively greater and lesser uniform thickness, said portions of relatively greater uniform thickness forming characters in relief provided with con .30 cave side walls approximately normal to the front surfaces of said characters in relief at the forwardly-presented edges of said side walls, and having their rearwardly-presented edges extend ing outwardly into a common plane spaced rear- -‘ wardly from said front surfaces and approxi mately parallel thereto, the forwardly-presented surface of said portions of lesser thickness being spaced rearwardly from said common plane and de?ned with respect to the outwardly-presented ~10 edges of said concave side walls by rectangular shoulders, and a layer of opaque material on the outer surface of said portions of lesser thickness and in abutment with said shoulders, said opaque material forming a background area extending outwardly from and on the same general level as the outwardly-presented edges of said concave side walls. 3. A light-transmitting sign plate having por tions of relatively greater thickness presented ' forwardly from and surrounded by portions of relatively lesser thickness to form characters in relief, said characters in relief being enlarged in cross-sectional area from top to bottom and provided with light-diffusing side walls, and an opaque layer covering the general surface of the portions of relatively lesser thickness and termi nating at the basal edges of said side walls to define enlarged light-apertures in the front sur face of said portions of lesser thickness for light GO rays entering said relief characters from the rear ' surface of the sign plate. 4. A glass sign plate having portions presented forwardly from a roughened background area to form characters in relief, said characters in re lief being provided with transparent top surfaces and side walls of exposed roughened glass beveled outwardly from and around said transparent top surfaces to provide said relief characters with enlarged cross-sectional areas at their bases, said roughened background area being electroplated around and between the bases of said characters in relief to de?ne apertures for light entering said characters from the rear of said sign plate. 5. A glass sign plate comprising portions pre 2,071,239 sented forwardly from a roughened opaque back ground portion of relatively lesser thickness to form characters in relief, said characters in relief being provided with color-flashed top lay ers and side walls of exposed roughened glass beveled outwardly and downwardly from around said color-?ashed top layers toward said opaque background. 6. A glass sign plate comprising portions of relatively greater and lesser thickness, said por tions of greater thickness being shaped and ar ranged to form characters in relief which are en larged in cross-sectional area from top to bottom 3 7. A sign plate constructed of light-transmit— ting material and comprising portions of rela— tively greater and lesser uniform thickness, the portions of relatively greater uniform thickness being provided with polished transparent top sur faces and roughened concavely beveled side walls approximately normal to said top surfaces at the top and approximately in parallelism therewith at the bottom to form characters in relief, the basal edges of said side walls being raised with 10 respect to the general surface of said portions of lesser thickness and defined therefrom by abrupt shoulders, and a layer of metal applied to the and de?ned from said portions of lesser thickness general surface of said portions of lesser thick 15 ness, said layer of metal being provided with 15 by abrupt shoulders, said characters in relief be ing provided with concavely beveled side walls of apertures conforming to said abrupt shoulders. roughened glass, and an opaque layer covering WILLIAM H. SPENCER. the forwardly-presented surface of said portions LESLIE R. BIRDSALL. of lesser thickness and de?ned from the basal 20 WILLIAM BAHLER. 20 edges of characters in relief by said abrupt shoul--v ders.