ZA733565B - Electric lamp assembly - Google Patents

Electric lamp assembly

Info

Publication number
ZA733565B
ZA733565B ZA733565A ZA733565A ZA733565B ZA 733565 B ZA733565 B ZA 733565B ZA 733565 A ZA733565 A ZA 733565A ZA 733565 A ZA733565 A ZA 733565A ZA 733565 B ZA733565 B ZA 733565B
Authority
ZA
South Africa
Prior art keywords
lamp assembly
electric lamp
electric
assembly
lamp
Prior art date
Application number
ZA733565A
Inventor
J Poole
Original Assignee
Plessey Handel Investment Ag
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 Plessey Handel Investment Ag filed Critical Plessey Handel Investment Ag
Publication of ZA733565B publication Critical patent/ZA733565B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
    • G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
ZA733565A 1972-09-25 1973-05-25 Electric lamp assembly ZA733565B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4429872A GB1389607A (en) 1972-09-25 1972-09-25 Electric lamp assembly

Publications (1)

Publication Number Publication Date
ZA733565B true ZA733565B (en) 1974-04-24

Family

ID=10432652

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA733565A ZA733565B (en) 1972-09-25 1973-05-25 Electric lamp assembly

Country Status (2)

Country Link
GB (1) GB1389607A (en)
ZA (1) ZA733565B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553956B1 (en) * 1983-10-20 1992-03-27 Delahaye Achille ELECTRONIC TELEPHONE ADAPTER FOR TRANSMITTING ADDITIONAL CALL WARNING, SEPARATE FROM CLASSIC RINGER
US4578542A (en) * 1984-05-07 1986-03-25 Alderman Robert J Line powered flasher circuit for ringing signal
GB2274959B (en) * 1993-02-08 1997-03-12 Neal Ferris Battery powered telephone visual ringing indicator

Also Published As

Publication number Publication date
GB1389607A (en) 1975-04-03

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