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.

Abstract: A manual for an electronic organ wherein the depression of keys takes place against resistance similar to that encountered on depression of piano keys. Thus, each key of the manual at first offers a pronounced resistance and thereupon a greatly reduced resistance to depression. Pusher is pivotably mounted on the key and cooperates with a convex cam face on a pivotable reaction lever such that the key must abruptly pivot the lever from one toward another end position during the initial stage of depression but the pusher is free to slide relative to the cam face in response to further depression of the key. The lever has a first arm which pivots the pusher relative to the cam face in response to pivoting of the lever from the one end position to thus reduce the force which the pusher can transmit to the lever, and the lever further comprises a second arm which carries a weight tending to pivot the lever back to its one end position.