Tunable bass-tone device

Details Tunable bass-tone device Tunable bass-tone device

1981-11-02

1984-05-15

Witkowski, Stanley J.

Music

Instruments

84453, 84DIG3, 84DIG22, G10H 136, G10H 506

Patent

active

044481039

ABSTRACT:
The present invention is directed to a bass-tone device for use with a piano. The device comprises a housing which can be mounted on a piano above the keyboard of the piano. A plurality of switches are mounted in the housing, and each of the switches has an engaging portion which extends from the housing and contacts a key of the piano when the key is in its normal undepressed state. The engaging portion of each of these switches moves to change the state of the switch in response to the depressing of the corresponding piano key. A bass-tone generator is mounted in the housing and the switches are connected to the generator. The bass-tone generator generates bass-tone signals in response to the change of state of the switches, which change states in accordance with the depression or raising of the piano keys.

REFERENCES:
patent: 274464 (1883-03-01), Clifford et al.
patent: 316908 (1885-04-01), O'Neill
patent: 1234814 (1917-07-01), Standridge
patent: 1300878 (1919-04-01), Reynolds
patent: 2779225 (1957-01-01), Carlson
patent: 3060784 (1962-10-01), Holt
patent: 3068334 (1962-12-01), Gibbs et al.
patent: 3095465 (1963-06-01), Holman
patent: 3671658 (1972-06-01), Ohno
patent: 4124313 (1978-11-01), Schmidt et al.
patent: 4294155 (1981-10-01), Turner
patent: 4380947 (1983-04-01), Nishimoto

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