FR851930A - Further training in warning or alarm devices - Google Patents

Further training in warning or alarm devices

Info

Publication number
FR851930A
FR851930A FR851930DA FR851930A FR 851930 A FR851930 A FR 851930A FR 851930D A FR851930D A FR 851930DA FR 851930 A FR851930 A FR 851930A
Authority
FR
France
Prior art keywords
warning
alarm devices
further training
training
alarm
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.)
COMM APP MARCHAL SOC D EXPL
Original Assignee
COMM APP MARCHAL SOC D EXPL
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 COMM APP MARCHAL SOC D EXPL filed Critical COMM APP MARCHAL SOC D EXPL
Application granted granted Critical
Publication of FR851930A publication Critical patent/FR851930A/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
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR851930D 1938-09-29 1938-09-29 Further training in warning or alarm devices Expired FR851930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR851930T 1938-09-29

Publications (1)

Publication Number Publication Date
FR851930A true FR851930A (en) 1940-01-18

Family

ID=9326236

Family Applications (1)

Application Number Title Priority Date Filing Date
FR851930D Expired FR851930A (en) 1938-09-29 1938-09-29 Further training in warning or alarm devices

Country Status (1)

Country Link
FR (1) FR851930A (en)

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