GB326306A - Improvements in or relating to glow discharge tubes for use for example in recording sound - Google Patents

Improvements in or relating to glow discharge tubes for use for example in recording sound

Info

Publication number
GB326306A
GB326306A GB465429A GB465429A GB326306A GB 326306 A GB326306 A GB 326306A GB 465429 A GB465429 A GB 465429A GB 465429 A GB465429 A GB 465429A GB 326306 A GB326306 A GB 326306A
Authority
GB
United Kingdom
Prior art keywords
discharge tube
discharge
recording
relating
light
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
GB465429A
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.)
RAYMOND BAINBRIDGE MORGAN
Parlophone Records Ltd
Original Assignee
RAYMOND BAINBRIDGE MORGAN
Gramophone Co 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 RAYMOND BAINBRIDGE MORGAN, Gramophone Co Ltd filed Critical RAYMOND BAINBRIDGE MORGAN
Priority to GB465429A priority Critical patent/GB326306A/en
Publication of GB326306A publication Critical patent/GB326306A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/004—Transducers other than those covered by groups H04R9/00 - H04R21/00 using ionised gas

Abstract

326,306. Gramophone Co., Ltd., and Morgan, R. B. Feb. 12, 1929. Vibrations, recording.-The light from an electric discharge tube used in recording mechanical or electrical oscillations is controlled or influenced magnetically. In the discharge tube described, a filamentary cathode 2 and a surrounding anode 3 ate enclosed in a glass or quartz envelope 1 containing mercury vapour, and a magnetic coil is arranged outside the envelope and coaxial with the filament. The magnet may be used only to concentrate the beam of light while it is modulated by fluctuating electrodepotentials, or, as shown in Fig. 3, the discharge may be maintained by a steady potential derived from a battery connected through a choke 5, the coil 4 then receiving the input oscillations and so modulating the discharge. The variations in the magnetic field may be produced by a mechanical vibrator. A loud-speaker 6 or other monitoring device may be applied across the discharge tube.
GB465429A 1929-02-12 1929-02-12 Improvements in or relating to glow discharge tubes for use for example in recording sound Expired GB326306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB465429A GB326306A (en) 1929-02-12 1929-02-12 Improvements in or relating to glow discharge tubes for use for example in recording sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB465429A GB326306A (en) 1929-02-12 1929-02-12 Improvements in or relating to glow discharge tubes for use for example in recording sound

Publications (1)

Publication Number Publication Date
GB326306A true GB326306A (en) 1930-03-13

Family

ID=9781270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB465429A Expired GB326306A (en) 1929-02-12 1929-02-12 Improvements in or relating to glow discharge tubes for use for example in recording sound

Country Status (1)

Country Link
GB (1) GB326306A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306810A (en) * 1995-10-20 1997-05-07 Central Research Lab Ltd Controlling the brightness of a glow discharge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306810A (en) * 1995-10-20 1997-05-07 Central Research Lab Ltd Controlling the brightness of a glow discharge

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