FR493793A - Sirène orientable avec amplificateur de sons - Google Patents

Sirène orientable avec amplificateur de sons

Info

Publication number
FR493793A
FR493793A FR493793DA FR493793A FR 493793 A FR493793 A FR 493793A FR 493793D A FR493793D A FR 493793DA FR 493793 A FR493793 A FR 493793A
Authority
FR
France
Prior art keywords
siren
adjustable
sound amplifier
amplifier
sound
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)
Inventor
Louis Chollet
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR493793A publication Critical patent/FR493793A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K7/00—Sirens
    • G10K7/02—Sirens in which the sound-producing member is rotated manually or by a motor
    • G10K7/04—Sirens in which the sound-producing member is rotated manually or by a motor by an electric motor

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR493793D 1918-12-12 1918-12-12 Sirène orientable avec amplificateur de sons Expired FR493793A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR493793T 1918-12-12

Publications (1)

Publication Number Publication Date
FR493793A true FR493793A (fr) 1919-08-21

Family

ID=1529506

Family Applications (1)

Application Number Title Priority Date Filing Date
FR493793D Expired FR493793A (fr) 1918-12-12 1918-12-12 Sirène orientable avec amplificateur de sons

Country Status (1)

Country Link
FR (1) FR493793A (fr)

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