Method for forming luminescent screens

Claim 1

A METHOD OF MAKING A LUMINESCENT SCREEN WHICH COMPRISES FROMING A THIN TRANSPARENT NON-LUMINESCENT, NON-CONDUCTING REFRACTORY LAYER ON A TRANSPARENT REFRACTORY GLASS BASE, CONDENSING THE VAPORIZED SOLID COMPONENTS OF ZINC SILICATE AND A VAPORIZED LUMINENESCENCE ACTIVATOR ON SAID TRANSPARENT NON-LUNINESCENT REFRACTORY LAYER WITHIN A HIGH VACUUM TO FORM THEREON A THIN LAYER CONTAINING SAID SOLID COMPONENTS IN THE CORRECT PROPORTIONS FOR FORMING THE ZINC SILILCATE THEREFROM ON BAKING OF SAID LAYER IN THE PRESENCE OF OXYGEN, SUBJECTING SAID LAYER TO FOR A TIME SUFFICIENT TO FORM ZINC SILICATE AND ACTIVATE THE SAME, FORMING A THIN TRANSPARENT NON-LUMINESCENT REFRACTORY LAYER ON SAID ZINC SILICATE LAYER, CONDENSING THE VAPORIZED SOLID COMPONENTS OF MAGNESIUM SILILCATE AND A VAPORIZED LUNINESCENCE ACTIVATOR ON SAID TRANSPARENT NON-LUMINESCENT REFRACTORY LAYER WITHIN A HIGH VACUUM TO FORM THEREON A THIN LAYER CONTAINING SAID SOLID COMPONENTS IN THE CORRECT PROPORTIONS FOR FORMING MAGNESIUM SILICATE THEREFROM ON BAKING OF SAID LAYER IN THE PRESENCE OF OXYGEN AND A LUMINESCENCE ACTIVATOR CAPABLE OF CAUSING THE FORMED MAGNESIUM SILICATE TO EMIT LIGHT OF A COLOR DIFFERENT FROM THAT EMITTED BY SAID LUMINESCENT ZINC SILICATE WHEN EXCITED BY BOMBARDMENT WITH ELECTRONS, AND SUBJECTING SAID LAYER TO BAKING IN THE PRESENCE OF OXYGEN AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO FORM MAGNESIUM SILICATE AND ACTIVATE THE SAME.

Claim 2

A METHOD OF MAKING A LUMINESCENT SCREEN WHICH COMPRISES FROMING A THIN TRANSPARENT NON-LUMINESCENT, NON-CONDUCTING REFRACTORY LAYER ON A TRANSPARENT REFRACTORY GLASS BASE, CONDENSING THE VAPORIZED SOLID COMPONENTS OF ZINC SILICATE AND A VAPORIZED LUMINENESCENCE ACTIVATOR ON SAID TRANSPARENT NON-LUNINESCENT REFRACTORY LAYER WITHIN A HIGH VACUUM TO FORM THEREON A THIN LAYER CONTAINING SAID SOLID COMPONENTS IN THE CORRECT PROPORTIONS FOR FORMING THE ZINC SILILCATE THEREFROM ON BAKING OF SAID LAYER IN THE PRESENCE OF OXYGEN, SUBJECTING SAID LAYER TO FOR A TIME SUFFICIENT TO FORM ZINC SILICATE AND ACTIVATE THE SAME, FORMING A THIN TRANSPARENT NON-LUMINESCENT REFRACTORY LAYER ON SAID ZINC SILICATE LAYER, CONDENSING THE VAPORIZED SOLID COMPONENTS OF MAGNESIUM SILILCATE AND A VAPORIZED LUNINESCENCE ACTIVATOR ON SAID TRANSPARENT NON-LUMINESCENT REFRACTORY LAYER WITHIN A HIGH VACUUM TO FORM THEREON A THIN LAYER CONTAINING SAID SOLID COMPONENTS IN THE CORRECT PROPORTIONS FOR FORMING MAGNESIUM SILICATE THEREFROM ON BAKING OF SAID LAYER IN THE PRESENCE OF OXYGEN AND A LUMINESCENCE ACTIVATOR CAPABLE OF CAUSING THE FORMED MAGNESIUM SILICATE TO EMIT LIGHT OF A COLOR DIFFERENT FROM THAT EMITTED BY SAID LUMINESCENT ZINC SILICATE WHEN EXCITED BY BOMBARDMENT WITH ELECTRONS, AND SUBJECTING SAID LAYER TO BAKING IN THE PRESENCE OF OXYGEN AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO FORM MAGNESIUM SILICATE AND ACTIVATE THE SAME.