FR612869A - Improvements to warning devices - Google Patents

Improvements to warning devices

Info

Publication number
FR612869A
FR612869A FR612869DA FR612869A FR 612869 A FR612869 A FR 612869A FR 612869D A FR612869D A FR 612869DA FR 612869 A FR612869 A FR 612869A
Authority
FR
France
Prior art keywords
warning devices
warning
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.)
Sparks Withington Co
Original Assignee
Sparks Withington Co
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 Sparks Withington Co filed Critical Sparks Withington Co
Application granted granted Critical
Publication of FR612869A publication Critical patent/FR612869A/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
    • 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
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/20—Sounding members
FR612869D 1926-03-17 1926-03-17 Improvements to warning devices Expired FR612869A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR612869T 1926-03-17

Publications (1)

Publication Number Publication Date
FR612869A true FR612869A (en) 1926-11-03

Family

ID=8979118

Family Applications (1)

Application Number Title Priority Date Filing Date
FR612869D Expired FR612869A (en) 1926-03-17 1926-03-17 Improvements to warning devices

Country Status (1)

Country Link
FR (1) FR612869A (en)

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