公开(公告)号：US2001504A

公开(公告)日：1935-05-14

申请号：US71261734

申请日：1934-02-23

Applicant: GEN ELECTRIC

Inventor： RUDOLF SCHMIDT

IPC: C03C3/089 ,  C03C3/091 ,  C03C4/00 ,  H01J61/30

CPC classification number: H01J61/302 ,  C03C3/089 ,  C03C3/091 ,  C03C4/0085 ,  H01J61/54

Abstract: 416,062. Glass manufacture. GENERAL ELECTRIC CO., Ltd., Kingsway, London.-(Assignees of Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin.) Jan. 30, 1934, No. 3140. Convention date, March 8, 1933. Drawings to Specification. [Class 56.] A glass, which is suitable for the envelope of a luminous electric discharge tube containing mercury, contains 4-18 per cent of boric oxide, 3-10 per cent of alkaline earths, and 15-22 per cent of alkalis, potassium oxide constituting at least two thirds of the alkali. Alumina may be added in quantities up to 5 per cent in order to make the glass work more easily in the flame. Examples of suitable glasses are given in the Specification and Specification 411,029 is referred to.

公开(公告)号：US2240352A

公开(公告)日：1941-04-29

申请号：US18945238

申请日：1938-02-08

Applicant: GEN ELECTRIC

Inventor： RUDOLF SCHMIDT ,  WALTER HANLEIN

IPC: C03C3/064 ,  C03C17/02

CPC classification number: C03C3/064 ,  C03C17/02