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FR848333A - Peripheral shutter siren - Google Patents

Peripheral shutter siren

Info

Publication number
FR848333A
FR848333A FR848333DA FR848333A FR 848333 A FR848333 A FR 848333A FR 848333D A FR848333D A FR 848333DA FR 848333 A FR848333 A FR 848333A
Authority
FR
France
Prior art keywords
siren
peripheral shutter
shutter
peripheral
shutter siren
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)
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.)
L APP ELECTRO IND PETRIER
Original Assignee
L APP ELECTRO IND PETRIER
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 L APP ELECTRO IND PETRIER filed Critical L APP ELECTRO IND PETRIER
Application granted granted Critical
Publication of FR848333A publication Critical patent/FR848333A/en
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)
FR848333D 1938-07-06 1938-07-06 Peripheral shutter siren Expired FR848333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR848333T 1938-07-06

Publications (1)

Publication Number Publication Date
FR848333A true FR848333A (en) 1939-10-26

Family

ID=9314218

Family Applications (1)

Application Number Title Priority Date Filing Date
FR848333D Expired FR848333A (en) 1938-07-06 1938-07-06 Peripheral shutter siren

Country Status (1)

Country Link
FR (1) FR848333A (en)

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