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.)
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 and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
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 and Halske AG, Siemens CorpfiledCriticalSiemens and Halske AG
Publication of GB494528ApublicationCriticalpatent/GB494528A/en
H01J17/00—Gas-filled discharge tubes with solid cathode
H01J17/50—Thermionic-cathode tubes
H01J17/52—Thermionic-cathode tubes with one cathode and one anode
H01J17/54—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes
H01J17/56—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes for preventing and then permitting ignition, but thereafter having no control
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Lasers
(AREA)
GB12132/37A1936-04-301937-04-28Improvements in or relating to gas-filled electric discharge devices
ExpiredGB494528A
(en)