FR842454A - Dispositif destiné à l'émission de signaux lumineux - Google Patents

Dispositif destiné à l'émission de signaux lumineux

Info

Publication number
FR842454A
FR842454A FR842454DA FR842454A FR 842454 A FR842454 A FR 842454A FR 842454D A FR842454D A FR 842454DA FR 842454 A FR842454 A FR 842454A
Authority
FR
France
Prior art keywords
emission
light signals
device intended
intended
signals
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
English (en)
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
Application granted granted Critical
Publication of FR842454A publication Critical patent/FR842454A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
FR842454D 1937-08-24 1938-08-22 Dispositif destiné à l'émission de signaux lumineux Expired FR842454A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE499472X 1937-08-24

Publications (1)

Publication Number Publication Date
FR842454A true FR842454A (fr) 1939-06-13

Family

ID=6545472

Family Applications (1)

Application Number Title Priority Date Filing Date
FR842454D Expired FR842454A (fr) 1937-08-24 1938-08-22 Dispositif destiné à l'émission de signaux lumineux

Country Status (2)

Country Link
FR (1) FR842454A (fr)
GB (1) GB499472A (fr)

Also Published As

Publication number Publication date
GB499472A (en) 1939-01-24

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