FR1257993A - Device for producing an acoustic signal, in particular a call signal - Google Patents

Device for producing an acoustic signal, in particular a call signal

Info

Publication number
FR1257993A
FR1257993A FR827930A FR827930A FR1257993A FR 1257993 A FR1257993 A FR 1257993A FR 827930 A FR827930 A FR 827930A FR 827930 A FR827930 A FR 827930A FR 1257993 A FR1257993 A FR 1257993A
Authority
FR
France
Prior art keywords
signal
producing
acoustic signal
call signal
call
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
FR827930A
Other languages
French (fr)
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
Priority to FR827930A priority Critical patent/FR1257993A/en
Application granted granted Critical
Publication of FR1257993A publication Critical patent/FR1257993A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR827930A 1960-05-20 1960-05-20 Device for producing an acoustic signal, in particular a call signal Expired FR1257993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR827930A FR1257993A (en) 1960-05-20 1960-05-20 Device for producing an acoustic signal, in particular a call signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR827930A FR1257993A (en) 1960-05-20 1960-05-20 Device for producing an acoustic signal, in particular a call signal

Publications (1)

Publication Number Publication Date
FR1257993A true FR1257993A (en) 1961-04-07

Family

ID=8731957

Family Applications (1)

Application Number Title Priority Date Filing Date
FR827930A Expired FR1257993A (en) 1960-05-20 1960-05-20 Device for producing an acoustic signal, in particular a call signal

Country Status (1)

Country Link
FR (1) FR1257993A (en)

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