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
GB36787/30A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbHfiledCriticalTelefunken AG
Publication of GB374416ApublicationCriticalpatent/GB374416A/en
H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
H01J19/02—Electron-emitting electrodes; Cathodes
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J2893/00—Discharge tubes and lamps
H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
Landscapes
Circuit Arrangements For Discharge Lamps
(AREA)
Abstract
374,416. Thermionic valves. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Dec. 5, 1930, No. 36787. Convention date, Dec. 6, 1929. Void [Published under Sect. 91 of the Acts]. [Class 39 (i).] A valve has two or more electrodes heated directly or indirectly, and arranged symmetrically or otherwise. The heating of the several electrodes may be unequal. With the application of an alternating potential to the electrodes, a square-topped or peaked wave-form is produced ; the valve may be used for frequency multiplication. The valve shown has two grids G<1>, G<2> and two heated electrodes E<1>, E<2>, connected in circuit so that G<1> is the control electrode when the electrode E<1> is the cathode ; similarly G2 is the control electrode for the electrode E<2> as cathode. The valve may contain mercury. The heating current may be reduced or cut off automatically, the electrodes being heated by the discharge.
GB36787/30A1929-12-061930-12-05Improvements in or relating to electric discharge tubes
ExpiredGB374416A
(en)