Music – Instruments – Wind
Patent
1986-10-06
1988-02-23
Witkowski, S. J.
Music
Instruments
Wind
84369, 335164, G10B 310
Patent
active
047262770
ABSTRACT:
Electrically and manually operable stop controls for a musical instrument such as an organ are disclosed. One embodiment of the stop control is a drawknob carried by an a transfer plate mounted for horizontal motion adjacent a solenoid having an iron core. Vertical hinge members at opposite ends of the solenoid support the transfer plate. A permanent magnet is mounted on each hinge member in general alignment with the iron core, the hinge members being spaced apart sufficiently to insure that only one permanent magnet at a time is adjacent the iron core, to thereby provide a manual magnetic and gravity-operated toggle motion. Application of an electrical direct current of selected polarity to the solenoid permits electrical shifting of the transfer plate. In a further embodiment, the drawknob is secured to a pivotally mounted armature having a cross-member which carries permanent magnets. Solenoids are mounted at opposite ends of the cross-member to provide electrical shifting of the armature. Fixed permanent magnets adjacent the path of the cross-member provide a toggle action. Another embodiment includes a stop control tablet secured to a pivotally mounted armature having a cross-member spanning a pair of control solenoids.
REFERENCES:
patent: 4615254 (1986-10-01), Klann
Kramer Justin
Peterson Richard H.
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