GB943333A - Improvements in or relating to alkali metal generators - Google Patents

Improvements in or relating to alkali metal generators

Info

Publication number
GB943333A
GB943333A GB1075959A GB1075959A GB943333A GB 943333 A GB943333 A GB 943333A GB 1075959 A GB1075959 A GB 1075959A GB 1075959 A GB1075959 A GB 1075959A GB 943333 A GB943333 A GB 943333A
Authority
GB
United Kingdom
Prior art keywords
alkali metal
coil
weight
powder
paste
Prior art date
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
GB1075959A
Inventor
Gordon Peter Davis
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1075959A priority Critical patent/GB943333A/en
Publication of GB943333A publication Critical patent/GB943333A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/16—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together
    • F16K3/20—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the seats
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
    • H01J40/02—Details
    • H01J40/04—Electrodes
    • H01J40/06—Photo-emissive cathodes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Heating (AREA)

Abstract

An alkali metal generator, for use within an envelope of a device in which a photo-emissive surface, e.g. of Na, K or Cs, is required to be deposited, e.g. on a base layer of Sb, Ag or other metal, comprises an electrically conducting heating element, a powdered mixture of a reducible alkali metal compound, e.g. chromate or bromide, and a reducing agent, e.g. Al, Si or Ca, and a binder for the mixture, e.g. alkali metal silicate, preferably the alkali metal in above compound, with or without tungsten powder as a moderator. An example gives a heating element made from a coil of tungsten wire wound on to a mandrel, and a powdered mixture of 1 part by weight chromate, e.g. Cs2CrO4 and 1 part by weight Al powder, mixed into a paste with the silicate, preferably of Cs, with or without 12 parts by weight W powder. The coil may be dipped into the paste or the element coated, and the Cs may be released from the generator by passing a current through the coil.
GB1075959A 1959-03-31 1959-03-31 Improvements in or relating to alkali metal generators Expired GB943333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1075959A GB943333A (en) 1959-03-31 1959-03-31 Improvements in or relating to alkali metal generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1075959A GB943333A (en) 1959-03-31 1959-03-31 Improvements in or relating to alkali metal generators

Publications (1)

Publication Number Publication Date
GB943333A true GB943333A (en) 1963-12-04

Family

ID=9973744

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1075959A Expired GB943333A (en) 1959-03-31 1959-03-31 Improvements in or relating to alkali metal generators

Country Status (1)

Country Link
GB (1) GB943333A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162681A (en) * 1984-06-08 1986-02-05 Philips Nv Electron emission devices and forming work function reducing layers thereon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162681A (en) * 1984-06-08 1986-02-05 Philips Nv Electron emission devices and forming work function reducing layers thereon

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