| 摘要 |
497,423. Uniting metal to ceramic material. LORENZ AKT.-GES., C. May 14, 1937, Nos. 13714 and 13735. Convention dates, May 14, 1936 and June 10, 1936. [Class 36] [Also in Groups XL and XXIII] A discharge device has a cover of ceramic material which is recessed or of porous structure in its surface to which a glass coating is applied. The porous cover may have inserts of dense ceramic material of low losses and may take the form shown in Fig. 3, where the dense ceramic tubes 6 carrying the leads 3 are inserted in a spool-shaped porous ceramic body (glass coating not shown). The leading in wires may be sealed into sockets 6<1>, Fig. 16, fixed in the cover by metal "melts." As shown in Fig. 23, the glass coating 4 may overlap the cover to facilitate sealing to the discharge vessel; this may be done by using an auxiliary support 1<1>, by giving the cover a flange 17 which is subsequently ground off, or by providing a removable metal or asbestos ring in the place of the flange. The cover may be sealed into metal rings of various shapes, preferably recessed as shown at 19, Fig. 29, which are sealed by flanges 20 to the vessel; or the cover may be sealed. to a metal envelope 1 by a metal melt 24, Fig. 33. The Specification as open to inspection under Sect. 91 includes the use of coatings of fusible material other than glass. This subjectmatter does not appear in the Specification as accepted. |
