Magnetic valve system for a musical instrument

Details Magnetic valve system for a musical instrument Magnetic valve system for a musical instrument

1997-09-17

2000-04-11

Nappi, Robert E.

Music

Instruments

Automatic

84 59, 84 60, 84155, 84160, 84645, 25112902, 13724713, 1372511, G10D 904

Patent

active

060490314

ABSTRACT:
A magnetic valve uses neodymium magnets to maintain itself in a state, either closed or open. Upon applying electrical signals to a coil, the valve state is changed. In the open state fluid may readily flow through the valve, whereas the closed state uses one or more magnets to seal a valve member such that fluid flow is blocked. In the open state, the magnitude of the electrical signal can be varied to vary the effective size of the opening through which fluid may flow, thereby providing proportional control. Importantly, the valve is controllable by a computer using a MIDI card such that the valve is especially suitable for adapting a player piano to operate from a computer. Additionally, the valve may be used in a sprinkler system, a fire suppression system, or various other applications.

REFERENCES:
patent: 4312380 (1982-01-01), Leiber et al.
patent: 4336737 (1982-06-01), Pomber
patent: 4619177 (1986-10-01), Caulkins
patent: 4995290 (1991-02-01), Heischober et al.
patent: 5407131 (1995-04-01), Maley et al.
patent: 5441434 (1995-08-01), Caulkins

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