Pick-up tube envelope sealant extending into groove of annular target support

Abstract

A target assembly of an image pick-up tube including a face plate hermetically fastened on one open end of a tubular envelope of the image pick-up tube through pressure welded binding member composed of indium which is interposed therebetween. A support member supporting therein a target substrate is mounted on the inner surface of the face plate and secured thereto through its peripheral wall combined with the binding member. On the peripheral wall is formed a groove extending circumferentially thereof. The binding member combines with the groove so that the support member favorably fastened to the face plate.

What is claimed is: 
     
       1. A target assembly of an image pick-up tube including a tubular envelope, which comprises: a transparent face plate;   an annular binding member welded both to the inner surface of said face plate and one open end of said tubular envelope;   an annular support member supporting therein a target substrate of said image pick-up tube mounted on the back surface of said face plate, said support member having on its peripheral wall a groove extending circumferentially of the peripheral wall which groove is combined with said binding member; and   an annular signal ring capping said envelope and secured thereto through an electrically conductive paint, said signal ring being contacted at its inner surface to the peripheral wall of said binding member.   
     
     
       2. A target assembly according to claim 1, wherein the peripheral wall of said support member is plated with indium. 
     
     
       3. A target assembly according to claim 1, wherein the peripheral wall of said support member is plated with tin. 
     
     
       4. A target assembly according to claim 1, wherein the peripheral wall of said support member is plated with an alloy of indium and tin. .Iadd. 5. A target assembly of an image pick-up tube including a tubular envelope, which comprises: a transparent faceplate;   an annular binding member pressure-welded both to the inner surface of said faceplate and one open end of said tubular envelope;   an annular support member supporting therein a target substrate of said image pick-up tube mounted on the back surface of said faceplate, said support member having on its peripheral wall a groove extending circumferentially of said support member and being combined with said binding member; and   an annular signal ring coupled with said envelope and contacted at its inner surface to the peripheral wall of said binding member..Iaddend..Iadd. 6. A target assembly according to claim 5, wherein the peripheral wall of said support member is plated with indium. .Iaddend..Iadd. 7. A target assembly according to claim 5, wherein the peripheral wall of said support member is plated with tin. .Iaddend..Iadd. 8. A target assembly of an image pick-up tube including a tubular envelope, which comprises:   a transparent faceplate;   an annular binding member pressure-welded both to the inner surface of said faceplate and one open end of said tubular envelope;   an annular support member supporting therein a target substrate of said image pick-up tube mounted on the back surface of said faceplate, said support member having on its peripheral wall a groove extending circumferentially of said support member and being combined with said binding member; and   an annular signal ring capping said envelope and contacted at its inner surface to the peripheral wall of said binding member. .Iaddend..Iadd. 9. A target assembly according to claim 1, wherein said binding member is made of indium. .Iaddend..Iadd. 10. A target assembly according to claim 5, wherein said binding member is made of indium. .Iaddend..Iadd. 11. A target assembly according to claim 8, wherein said binding member is made of indium..Iaddend.