Music – Instruments – General features
Patent
1976-06-25
1978-12-05
Tomsky, Stephen J.
Music
Instruments
General features
84 101, 84434, 84435, G10C 312, G10H 100
Patent
active
041280350
ABSTRACT:
A keyboard assembly incorporates a plurality of key members molded of thermoplastic material, each of the keys having an integrally formed pivot wall supported on a pair of pivot points disposed on a pair of pivot members integral with a pivot bracket. The key members are located laterally by the pivot wall being gripped between the pivot points, and is located longitudinally relative to the pivot members by means of two pairs of locating ridges, one pair on each side of the pivot wall. A pair of resilient tabs integral with the plastic key member engage the upper corners of the pivot members, and a rib extending downwardly from the pivot wall extends into a slot to resist twisting of the key member. A key guide strip for the key member has a pair of vertically aligned projections, for supporting bumpers which guide the forward end of the key member and which provide a cushioning action for noiselessly stopping of upward movement of the key member. The rear end of the key member has a series of integrally formed transverse walls and projections which permit a preformed actuator wire to be held in a fixed position, without any separate fastening devices.
REFERENCES:
patent: 3120146 (1964-02-01), Stiles
patent: 3561315 (1971-02-01), Ohno
patent: 3722351 (1973-03-01), Allen et al.
patent: 3835235 (1974-09-01), Amano
patent: 3855894 (1974-12-01), Thomas et al.
Erickson Norman
Meier James
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