Indicating organ stop tablet

Details Indicating organ stop tablet Indicating organ stop tablet

1977-06-27

1979-06-05

Hix, L. T.

Music

Instruments

Wind

84369, 84 117, G10B 310

Patent

active

041570510

ABSTRACT:
A stop tablet control system for an organ in which the "on" condition of selected stops is indicated by an illuminated light-emitting diode (L.E.D.) mounted in each stop tablet. The stop tablets are pivotally supported on a tablet rail and spring-biased to assume a neutral position from which they can be momentarily moved up or down against the action of the spring. When a tablet is momentarily pushed down from the neutral position a switch is closed to actuate circuitry which turns on the associated stop and energizes the L.E.D., and when the tablet is momentarily pushed up from the neutral position the associated stop is turned "off" and the L.E.D. extinguished. The system includes control circuitry for providing in a combination stop action mode an indication of what stops are playing.

REFERENCES:
patent: 3460426 (1969-08-01), Jensen
patent: 4023457 (1977-05-01), Kirkwood

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