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Publication of FR547397ApublicationCriticalpatent/FR547397A/fr
G04C21/00—Producing acoustic time signals by electrical means
G04C21/04—Indicating the time of the day
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
G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
G10K1/28—Bells for towers or the like
G10K1/30—Details or accessories
G10K1/34—Operating mechanisms
G10K1/347—Operating mechanisms for an oscillating bell which is driven twice per cycle
G10K1/348—Operating mechanisms for an oscillating bell which is driven twice per cycle electrically operated
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Engineering & Computer Science
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Acoustics & Sound
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General Physics & Mathematics
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FR547397D1921-03-071922-02-17Perfectionnements aux appareils pour la sonnerie électrique des cloches
ExpiredFR547397A
(fr)