Music – Instruments – General features
Patent
1991-05-30
1993-02-09
Gellner, Michael L.
Music
Instruments
General features
G10C 312
Patent
active
051854902
ABSTRACT:
A key guide for use in a musical or other keyboard comprises a chassis (17), a bumper (16), a bushing (13) and a track (10). The bushing slides against the track during operation. Bushing support means (12) connect the bushing with the chassis and allow limited side motion of the bushing in response to side force produced during operation. The bumper is formed of a softer material than the bushing and is disposed to cushion impact of the bushing with the chassis. Means are provided to disengage the bumper from the bushing and/or the chassis when compressive side force is reversed. Various embodiments are disclosed which accommodate side force over 360 degrees and in two opposite directions. An embodiment utilizing the invention to guide an independent Janko musical keyboard key is disclosed.
REFERENCES:
patent: 821533 (1906-05-01), Pekat
patent: 2117002 (1938-05-01), Hammond
patent: 2675728 (1954-04-01), Jewett
patent: 2675729 (1954-04-01), Jewett
patent: 3693492 (1972-09-01), Ohno
patent: 3736831 (1973-06-01), May
patent: 3738216 (1973-06-01), Slaats
patent: 3820433 (1974-06-01), Hayashida
patent: 3859885 (1975-01-01), Hayashida
patent: 4248130 (1981-02-01), Erickson
patent: 4574171 (1986-03-01), Denley
Gellner Michael L.
Spyrou Cassandra C.
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