FR459570A - Improvements to sirens and similar devices - Google Patents

Improvements to sirens and similar devices

Info

Publication number
FR459570A
FR459570A FR459570DA FR459570A FR 459570 A FR459570 A FR 459570A FR 459570D A FR459570D A FR 459570DA FR 459570 A FR459570 A FR 459570A
Authority
FR
France
Prior art keywords
sirens
similar devices
similar
devices
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 BLERIOT DES ETS
Original Assignee
L BLERIOT DES ETS
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 BLERIOT DES ETS filed Critical L BLERIOT DES ETS
Application granted granted Critical
Publication of FR459570A publication Critical patent/FR459570A/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)
FR459570D 1912-07-12 1913-06-23 Improvements to sirens and similar devices Expired FR459570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE459570X 1912-07-12

Publications (1)

Publication Number Publication Date
FR459570A true FR459570A (en) 1913-11-08

Family

ID=1499046

Family Applications (1)

Application Number Title Priority Date Filing Date
FR459570D Expired FR459570A (en) 1912-07-12 1913-06-23 Improvements to sirens and similar devices

Country Status (1)

Country Link
FR (1) FR459570A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4908601A (en) * 1987-07-27 1990-03-13 Whelen Technologies, Inc. Loud speaker with horizontal radiation pattern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4908601A (en) * 1987-07-27 1990-03-13 Whelen Technologies, Inc. Loud speaker with horizontal radiation pattern

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