Patents Examined by William B. Perky
  • Key board system for an electronic musical instrument
    Patent number: 4587877
    Abstract: In a key board system for an electronic musical instrument, input signals for the instrument generated in response to key actuation have an electrical characteristic which varies as a function of the key actuation force. The foregoing results from the deflection of a mass-carrying leaf spring in response to a key stroke, the input signal being generated by a piezoelectric element mounted on the leaf spring and being deformed in response to the deflection thereof.
    Type: Grant
    Filed: November 20, 1984
    Date of Patent: May 13, 1986
    Assignee: Matth Hohner AG
    Inventor: Ernst Zacharias