FR27449E - Improvements to electric alarms - Google Patents

Improvements to electric alarms

Info

Publication number
FR27449E
FR27449E FR27449DA FR27449E FR 27449 E FR27449 E FR 27449E FR 27449D A FR27449D A FR 27449DA FR 27449 E FR27449 E FR 27449E
Authority
FR
France
Prior art keywords
electric alarms
alarms
electric
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.)
Sev Marchal
Original Assignee
Sev Marchal
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 Sev Marchal filed Critical Sev Marchal
Application granted granted Critical
Publication of FR27449E publication Critical patent/FR27449E/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
    • G10K9/10—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by mechanical means only

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR27449D 1923-02-28 1923-02-28 Improvements to electric alarms Expired FR27449E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR27449T 1923-02-28

Publications (1)

Publication Number Publication Date
FR27449E true FR27449E (en) 1924-07-01

Family

ID=8665760

Family Applications (1)

Application Number Title Priority Date Filing Date
FR27449D Expired FR27449E (en) 1923-02-28 1923-02-28 Improvements to electric alarms

Country Status (1)

Country Link
FR (1) FR27449E (en)

Similar Documents

Publication Publication Date Title
FR575138A (en) Improvements to electrical switches
FR762305A (en) Improvements to electrical fuses
FR580321A (en) Improvements to electrical switches
FR578711A (en) Improvements to electrical switches
FR579844A (en) Improvements to electrical switches
FR27449E (en) Improvements to electric alarms
FR560702A (en) Improvements to electric alarms
FR574871A (en) Improvements to electric hoists
FR582145A (en) Improvements to insulators
FR578243A (en) Improvements to electrical switches
FR586594A (en) Improvements to electrical switches
FR575766A (en) Improvements to electric accumulators
FR587629A (en) Improvements to electric cables
FR564047A (en) Improvements to bioyclettes
FR589810A (en) Improvements to thermo-siphons
FR568598A (en) Improvements to parqueters
FR572322A (en) Improvements to
FR547433A (en) Improvements to electric alarms
FR584575A (en) Improvements to electric horns
FR28793E (en) Improvements to electric alarms
FR582815A (en) Improvements to insulators
FR577790A (en) Improvements to insulators
FR588284A (en) Improvements to electric tachometers
FR574707A (en) Improvements to electrical switches
FR575219A (en) Improvements to electrical switches