Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB35880/36A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Schuckertwerke AG, Siemens AGfiledCriticalSiemens Schuckertwerke AG
Publication of GB469069ApublicationCriticalpatent/GB469069A/en
H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
H01J13/02—Details
H01J13/28—Selection of substances for gas filling; Means for obtaining the desired pressure within the tube
Landscapes
Sealing Material Composition
(AREA)
Abstract
469,069. Coating with metals. SIEMENS-SCHUCKERTWERKE AKT.-GES. Dec. 31, 1936, No. 35880. Convention date, April 30. [Class 82 (ii)] [Also in Groups XXVIII, XXXVI, and XL] A vacuum vessel 3 such as an electric discharge vessel having walls consisting partly or wholly of iron or other metal is first heated to 500‹ C. in a furnace 1 which is either under vacuum or contains an inert atmosphere, while the interior of the vessel is evacuated to de-gas the metal parts ; the temperature is then reduced to 300‹ C. and the vessel finally evacuated, and if required filled with a gas or a cathode liquid, e.g. mercury through a U-tube 9. The furnace is then lifted and the vessel sealed off. The vessel may be coated with metal before being placed in the furnace, this metal closing the pores, e.g copper, silver, &c. may be sprayed on the walls, or aluminium foil or powder may be applied to the iron parts.
GB35880/36A1936-04-301936-12-31An improved method for sealing vacuum vessels
ExpiredGB469069A
(en)