Music – Instruments – General features
Patent
1977-12-12
1980-06-03
Franklin, Lawrence R.
Music
Instruments
General features
84430, 84435, 84438, 84439, 84452P, G10C 312
Patent
active
042055830
ABSTRACT:
The keyboard for pianos and similar musical instruments has key shanks (levers) formed of structural foam containing glass fibers, there being only one shank construction for all the white keys and another for all the black. The shanks are connected, at their outer ends, to self-positioning hollow key caps. Each shank rests, at a laterally thickened central portion, on a synthetic resin balance rail from which an integral balance pin projects into a slot in such central portion. The outer end of each shank rests on a synthetic resin guide rail having a guide pin formed integrally therewith and extending into the shank. The laterally thickened central portions of the shanks are sufficiently close to each other to provide a strengthening effect creating much resistance to side forces such as occur, for example, during shipment. The balance rail and guide rail, with their integral pins, are injection molded of solid synthetic resin.
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CBS Inc.
Franklin Lawrence R.
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