Manual with piano effect for use in electronic organs

Details Manual with piano effect for use in electronic organs Manual with piano effect for use in electronic organs

1990-02-23

1991-02-19

Brown, Brian W.

Music

Instruments

General features

G10D 312

Patent

active

049933051

ABSTRACT:
The actions of a manual with piano effect for use in electronic organs have keys which are pivotable about a first horizontal axis and carry rigid or elastic pushers abutting plate-like motion receiving portions on the first arms of discrete reaction levers. The second arm of each lever carries a weight which urges the motion receiving portion of the first arm against a pad at the adjacent end of the pusher. The distance of the point of contact between the pusher and the first arm of the reaction lever from the respective key in idle posotion of the key is greater than the distance of the key from the pivot axis of the reaction lever. This renders it possible to ensure that the resistance of the reaction lever to further depression of the respective key decreases in response to pivoting of the key through a predetermined angle from its idle position. The pusher engages only the first arm of the respective reaction lever and is fixedly secured to the respective key.

REFERENCES:
patent: 4217803 (1980-08-01), Dodds
patent: 4860630 (1989-08-01), Franz
patent: 4901614 (1990-02-01), Kumano et al.

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