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US 5,469,772 AGranted
Linearly reciprocating keyboard key incorporating two guide pins
OwnerPaul B. Vandervoortinventor
Life of this patent
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Abstract
A keyboard for use in a musical instrument or other application includes a key incorporating two guide pins extending downward from directly underneath the key. The front guide pin passes through two bushings, the rear guide pin passes through one bushing. Various preferred embodiments are disclosed including: Application to a Janko musical keyboard with independent keys and MIDI functions; A combination return spring and motion sensor; a swing arm return spring and contact spring mechanism; and a method of bundling together multiple frame members to hold multiple key rows with enhanced rigidity.
Claims15
In a keyboard for a finger-operated device,
- a key, a front guide pin, a rear guide pin, a frame member, said guide pins extending downward directly from the underside of said key,
- the improvement comprising,
- an upper front bushing, a lower front bushing, and a rear bushing, wherein,
- said bushings are incorporated in said frame member, said front guide pin mates with said front bushings and said rear guide pin mates with said rear bushing.
1 more element
Dependencies are inferred from the claim text.