Key-driving/detecting mechanism for keyboard instrument

Music – Instruments – General features

Patent

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Details

84435, G10C 312

Patent

active

045246696

ABSTRACT:
A key-driving/detecting mechanism for performing automatically a keyboard instrument is constituted by a plurality of keys arranged on a key bed, each key being rotatable about a balance pin secured to a balance rail, and an electromagnetic device interposed between a lower surface of each key and the key bed at a position to the rear of the balance pin. Each electromagnetic device comprises an electromagnetic oil mounted on the key bed and a permanent magnet secured to a rear surface of the key. The simplicity of the key-driving/detecting mechanism is implemented by this disposition of the electromagnetic device. In a modification a pair of electromagnetic devices are provided in front of and in rear of the balance pin.

REFERENCES:
patent: 3160052 (1964-12-01), Von Gunten
patent: 3657459 (1972-04-01), Peterson et al.
patent: 3680426 (1972-08-01), Fry
patent: 4027569 (1977-06-01), Luce et al.
patent: 4176578 (1979-12-01), Campbell et al.
patent: 4338848 (1982-07-01), Rhodes

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