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Expired
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Ludwig Hupfeld
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Individual
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Individual
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Publication of GB190501948ApublicationCriticalpatent/GB190501948A/en
1948. Hupfeld, L. Jan. 31. Automatic instruments. -In apparatus for playing keyboard instruments, the two controlling-levers A, B which regulate the tone expression for the bass and the treble are arranged one behind the other, on the same side of the time-controlling lever, or equivalent device, so that they can be operated separately or s i m u ltaneously by means of one band. The handles E, F of the levers are at different levels, and the levers have a common pivot.
GB190501948D1905-01-311905-01-31Improvements in or relating to Apparatus for Playing Pianos and other Key-instruments.
ExpiredGB190501948A
(en)