FR600888A - Improvements to electrical alarms - Google Patents

Improvements to electrical alarms

Info

Publication number
FR600888A
FR600888A FR600888DA FR600888A FR 600888 A FR600888 A FR 600888A FR 600888D A FR600888D A FR 600888DA FR 600888 A FR600888 A FR 600888A
Authority
FR
France
Prior art keywords
electrical alarms
alarms
electrical
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
Ernst Lieben
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 FR600888A publication Critical patent/FR600888A/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)
FR600888D 1925-07-17 1925-07-17 Improvements to electrical alarms Expired FR600888A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR600888T 1925-07-17

Publications (1)

Publication Number Publication Date
FR600888A true FR600888A (en) 1926-02-17

Family

ID=8970656

Family Applications (1)

Application Number Title Priority Date Filing Date
FR600888D Expired FR600888A (en) 1925-07-17 1925-07-17 Improvements to electrical alarms

Country Status (1)

Country Link
FR (1) FR600888A (en)

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