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
GB25308/31A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Publication of GB375614ApublicationCriticalpatent/GB375614A/en
H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
H01J40/02—Details
H01J40/04—Electrodes
H01J40/06—Photo-emissive cathodes
Landscapes
Weting
(AREA)
Laminated Bodies
(AREA)
Abstract
375,614. Photo-electric cells. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Sept. 9, 1931, No. 25308. Convention date, Sept. 27. 1930. Drawings to Specification. [Class 39 (i).] Photo-electric material such as an alkali or alkaline earth metal is supported on a layer of a chemical compound which is transparent to light and is applied to a non-metallic support, such as the envelope, which is also transparent. Caesium may be deposited on a thin layer of calcium fluoride, and the cell heated so that caesium penetrates into the layer ; or particles of tungsten may be incorporated in the layer. In another cell, caesium is deposited on caesium oxide on an etched glass envelope. Potassium may be deposited on sodium chloride. Specification 326,200, [Class 39 (i), Electric lamps, Arc &c.], is referred to.
GB25308/31A1930-09-271931-09-09Improvements in or relating to photo-electric cells
ExpiredGB375614A
(en)