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Otto Paul Spaethe
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16,193. Spaethe, O. P. July 21. Accordions. - In a double fingerboard for accordions, pairs of levers are made of single pieces, and with bends which act one on the other so as to effect the simultaneous and similar movement of both levers. The key - lever f and the lever g are bent over wires m, h fixed in the longitudinal recesses c, d of the keyboard a. When the lever f is actuated by the finger-piece e, the bend k acts on the bend l in the lever g; when the piece e is released, the controlling-spring i returns the lever g, and through it the lever f.
GB190416193D1904-07-211904-07-21Improvements in Double Finger-boards for Accordions.
ExpiredGB190416193A
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