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
GB3409334A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co LtdfiledCriticalBritish Thomson Houston Co Ltd
Priority to GB3409334ApriorityCriticalpatent/GB452856A/en
Publication of GB452856ApublicationCriticalpatent/GB452856A/en
H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
H01J19/42—Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
H01J19/44—Insulation between electrodes or supports within the vacuum space
Landscapes
Inorganic Insulating Materials
(AREA)
Abstract
Pure magnesium oxide in admixture with pure beryllium oxide in amounts up to 40 per cent is heated to sintering temperature to form an insulating material having a low dielectric loss and suitable for use in short-wave apparatus and high-frequency condensers. The mixture of oxides may be moulded before sintering and may be worked by boring, sawing, &c. after being sintered.
GB3409334A1934-11-271934-11-27Improvements in and relating to electric discharge devices
ExpiredGB452856A
(en)