FR740743A - Improvements to electrical warning devices - Google Patents

Improvements to electrical warning devices

Info

Publication number
FR740743A
FR740743A FR740743DA FR740743A FR 740743 A FR740743 A FR 740743A FR 740743D A FR740743D A FR 740743DA FR 740743 A FR740743 A FR 740743A
Authority
FR
France
Prior art keywords
warning devices
electrical warning
electrical
devices
warning
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)
Inventor
Rene Clammer
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 filed Critical
Application granted granted Critical
Publication of FR740743A publication Critical patent/FR740743A/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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
    • G10K9/15—Self-interrupting arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR740743D 1931-10-30 1931-10-30 Improvements to electrical warning devices Expired FR740743A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR740743T 1931-10-30

Publications (1)

Publication Number Publication Date
FR740743A true FR740743A (en) 1933-01-31

Family

ID=9135846

Family Applications (1)

Application Number Title Priority Date Filing Date
FR740743D Expired FR740743A (en) 1931-10-30 1931-10-30 Improvements to electrical warning devices

Country Status (1)

Country Link
FR (1) FR740743A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645768A (en) * 1949-08-24 1953-07-14 Santino Louis Sound generating device
US2994078A (en) * 1959-01-09 1961-07-25 George S Uchihara Engine noise simulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645768A (en) * 1949-08-24 1953-07-14 Santino Louis Sound generating device
US2994078A (en) * 1959-01-09 1961-07-25 George S Uchihara Engine noise simulator

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