GB380740A - Improved method of influencing an electric current by radiation - Google Patents

Improved method of influencing an electric current by radiation

Info

Publication number
GB380740A
GB380740A GB9613/32A GB961332A GB380740A GB 380740 A GB380740 A GB 380740A GB 9613/32 A GB9613/32 A GB 9613/32A GB 961332 A GB961332 A GB 961332A GB 380740 A GB380740 A GB 380740A
Authority
GB
United Kingdom
Prior art keywords
discharge
radiation
anode
gas
vapour
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
GB9613/32A
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 NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB380740A publication Critical patent/GB380740A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
    • H01J40/16—Photoelectric discharge tubes not involving the ionisation of a gas having photo- emissive cathode, e.g. alkaline photoelectric cell

Landscapes

  • Discharge Lamp (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)

Abstract

380,740. Discharge apparatus. NAAM. LOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. April 4, 1932, No. 9613. Convention date, April 4, 1931. [Class 39 (i).] A tube has a cold cathode consisting of two or more spaced parts and containing a gas or vapour the atoms of which can be in a metastable condition, and the gas &c. near one part of the electrode is subjected to radiation by light containing frequencies adapted to be absorbed by the metastable atoms, so that the conductivity of the discharge path near that part decreases and the discharge is transferred to the other part or parts. As shown, the cathode consists of two semicircular discs 5, 6. The potential between the part 5 and the anode 2 is made greater than that between the part 6 and the anode by inserting a resistance 15 in the circuit of the part 6, or by mounting the part 5 nearer the anode. The transference of the discharge from the part 5 to the part 6 due to radiation by light from a lamp 16 produces a reading in an ammeter 14. The filling may be neon at a pressure of 20 millimetres, and a small quantity of gas or vapour having a lower ionization potential, for example 0À001 per cent of argon, may be added. The device may be used -in apparatus for registering the number of persons passing a given point.
GB9613/32A 1931-04-04 1932-04-04 Improved method of influencing an electric current by radiation Expired GB380740A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL380740X 1931-04-04

Publications (1)

Publication Number Publication Date
GB380740A true GB380740A (en) 1932-09-22

Family

ID=19785648

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9613/32A Expired GB380740A (en) 1931-04-04 1932-04-04 Improved method of influencing an electric current by radiation

Country Status (1)

Country Link
GB (1) GB380740A (en)

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