Patent GB-1006225-A (GB)
Title: Manufacture of electroluminscent lamps
Inventor: PERKINS NORRIS IRVING
IPC: H05B33/26
Filed: 1962-06-09
Abstract: A method of breaking the continuity of an electrically conductive film in contact with a vitreous material, e.g. in an electroluminescent lamp, comprises fusing a portion of the vitreous material to cause it to absorb the adjacent portion of the conductive film and thereafter allowing the vitreous material to solidify. The method can be applied to an electroluminescent <PICT:1006225/C4-C5/1> lamp having two electrodes separated by a phosphor dispersed in a light-transmitting vitreous enamel, one of the electrodes being an electrically conductive film, or to an electroluminescent lamp in which the vitreous enamel layer is a protective layer.  The phosphor can be copper activated zinc sulphide and the vitreous enamel can be as described in Specification 773,997.  The electrically conductive film can be formed by spraying, dipping or vacuum deposition methods using chlorides, oxides, sulphates, or organic complexes of tin, antimony or indium.  The vitreous enamel is fused by exposing the structure to a gas and oxygen flame. Endless belt apparatus is described for the treatment of a plurality of electroluminescent lamps.  The electroluminescent lamp shown in Fig. 4 comprises a tube or rod 53 of metal or conductive glass, a layer 54 of vitreous enamel, a layer 55 of phosphor in vitreous enamel, a light transmitting conductive layer 56, 59 and a layer 57 of transparent vitreous enamel.  The electrode 53 is insulated from the electrode formed by the layer 56 by the insulating band 58 formed by the above method either before of after the application of the layer 57.  The area of light emission from the lamp is determined by the location of the band 58.  The method can be applied to flat or elongated electroluminescent lamps.ALSO:A method of breaking the continuity of an electrically conductive film in contact with a vitreous material, e.g. in an electroluminescent lamp, comprises fusing a portion of the vitreous material to cause it to absorb the adjacent portion of the conductive film and thereafter allowing the vitreous material to solidify.  The vitreous material can be a vitreous enamel as described in Specification 773,997.  The electrically conductive film can be formed by spraying, dipping or vacuum deposition methods using chlorides, oxides, sulphates, or organic complexes of tin, antimony or indium.  The vitreous enamel is fused by exposing the structure to a gas and oxygen flame.  Endless belt apparatus is described for the treatment of a plurality of electroluminescent lamps having a phosphor dispersed in a vitreous enamel, one of the electrodes being an electrically conductive film, or having a vitreous enamel protective layer.ALSO:A method of breaking the continuity of an electrically conductive film in contact with a vitreous material, e.g. in an electroluminescent lamp, comprises fusing a portion of the vitreous material to cause it to absorb the adjacent portion of the conductive film and thereafter allowing the vitreous material to solidify.  The vitreous material can be a vitreous enamel as described in Specification 773,997.  The electrically conductive film can be formed by spraying, dipping or vacuum deposition methods using chlorides, oxides, sulphates, or organic complexes of tin, antimony or indium.  The vitreous enamel is fused by exposing the structure to a gas and oxygen flame.  Endless belt apparatus is described for the treatment of a plurality of electroluminescent lamps having a phosphor dispersed in a vitreous enamel, one of the electrodes being an electrically conductive film, or having a vitreous enamel protective layer.