Albert W Nordquist

45007560, Feb 19, 1985

Mar 19, 1982

6/359827

Frederick C. Feagans - Central SC
Albert W. Nordquist - Ivoryton CT

Pratt-Read Corporation - Ivoryton CT

H01H 900

200 5A

A keyboard for a musical instrument having a plurality of elongated keys with each key having a rearwardly extending actuating arm. The arm has an upper and a lower nonresilient switch actuator for actuating a respective first and second keyboard switch with each switch having a substrate with at least one fixed contact. A deformable membrane has coupled thereto a movable contact which is adapted for movement into and out of electrical connection with the fixed contact. The first and second switches are positioned so that the lower actuator normally maintains closed the first switch and when the key is actuated the first switch opens and the upper actuator closes the second switch. The deformable membrane is formed of Poron cellular urethane which distributes and absorbs the actuation force and springs back to its undeformed shape when not actuated.

44186053, Dec 6, 1983

Jun 25, 1980

6/162914

Kjell T. Tollefsen - Ivoryton CT
Albert W. Nordquist - Ivoryton CT

Pratt-Read Corporation - Ivoryton CT

G10C 312

84434

A keyboard for a musical instrument having a frame structure and a plurality of elongated keys. Flat pivot springs are provided for each key and are rigidly held in a vertical position in the frame structure. Each key has a chamber with a lower opening in a rear section for receiving the upper section of an associated pivot spring so that the pivot spring forms the sole pivot about which the key may rotate in a single plane only. The pivot spring is rigidly held in the key chamber in a force fit without the use of a separate fastening device.