Importance

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Abstract

A control device provides a transparent overlay for an electronic display, the overlay having at least one closed channel formed therein to accommodate a fader tongue that is translatable therealong. A fader cap has no mechanical attachment to the fader tongue but includes a magnet, whereby the fader cap may be placed onto the outer surface of the overlay to establish a magnetic coupling to a magnet in the fader tongue for mutual translation purposes. Wheels on the fader cap maximize the glide of the fader cap and constrain translation so that the axis of travel of the wheeled fader cap is aligned with the underlying channel. The fader cap may include a touch detecting switch, and RF circuit for communicating the touch signal to a host computer for feedback control of the associated fader tongue.

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First Claim