GB190509961A - Improvements in or relating to the Controlling Levers of Mechanically or Pneumatically Operated Keyboard Musical Instruments.
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Improvements in or relating to the Controlling Levers of Mechanically or Pneumatically Operated Keyboard Musical Instruments.
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Ludwig Hupfeld
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9961. Hupfeld, L. May 11. Automatic instruments.-The expression.controlling bass and treble levers A, B in mechanically or pneumatically operated keyboard instruments are located on the same side of the tempo lever, as shown in plan in Fig. 5, and are adapted to be moved towards each other, or they are on opposite sides, as shown in Fig. 2, and their finger-plates E, F are brought near together, one being above. The expression levers may move in one or two inclined slots, or in two slots, one lying behind the other.
GB190509961D1905-05-111905-05-11Improvements in or relating to the Controlling Levers of Mechanically or Pneumatically Operated Keyboard Musical Instruments.
ExpiredGB190509961A
(en)