FR864238A - Modulating lamps for infra-red telephony - Google Patents

Modulating lamps for infra-red telephony

Info

Publication number
FR864238A
FR864238A FR864238DA FR864238A FR 864238 A FR864238 A FR 864238A FR 864238D A FR864238D A FR 864238DA FR 864238 A FR864238 A FR 864238A
Authority
FR
France
Prior art keywords
telephony
infra
red
modulating
lamps
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
Other languages
French (fr)
Inventor
Jean-Baptiste Joseph Ma Abadie
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 filed Critical
Application granted granted Critical
Publication of FR864238A publication Critical patent/FR864238A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
FR864238D 1939-11-29 1939-11-29 Modulating lamps for infra-red telephony Expired FR864238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR864238T 1939-11-29

Publications (1)

Publication Number Publication Date
FR864238A true FR864238A (en) 1941-04-22

Family

ID=9343740

Family Applications (1)

Application Number Title Priority Date Filing Date
FR864238D Expired FR864238A (en) 1939-11-29 1939-11-29 Modulating lamps for infra-red telephony

Country Status (1)

Country Link
FR (1) FR864238A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562887A (en) * 1945-01-04 1951-08-07 Westinghouse Electric Corp Vapor lamp and system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562887A (en) * 1945-01-04 1951-08-07 Westinghouse Electric Corp Vapor lamp and system

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