Use of Interrupted Current as Method of Effecting an Initial Quivering in the Vibration of Bodies by Electricity, more especially the Strings of Musical Instruments such as the Piano.
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Electrically-operated musical instrument.
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Contact-interrupter for the electromagnetic production of musical sounds.
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Contact Breaker Device for Electromagnetic Vibrating Members.
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Contact-breaker device for electromagnetic vibrating members.
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Improvements in Electromagnetic Devices for Setting in Vibration the Sonorous Members of Keyboard Instruments and in particular Piano-strings.
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Contact-breaker device for electromagnetic vibrating members.
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Contact-breaker Device for Electromagnetic Vibrating Members.