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Old 06-29-2013, 07:15 PM
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Tim Tim is offline
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Join Date: Mar 2004
Location: New Jersey
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I happen to have one of the Oneida units with the 3 sliders as shown in the auction link that RCA2000 posted. The patent number on it is 3967314. Here is the description from the patent document:

"A means is disclosed for selectively increasing the emission of the several color guns of a color picture tube by placing a variable resistance between the control grid and the screen grid corresponding to each said color gun. This provides a source for increasing the voltage on the control grid of that color gun. As the voltage on the control grid is increased, the emission of that color gun is increased, thereby making it possible to blend the colors of the several color guns."

"The unit disclosed herein is constructed of three slide resistance controls. The controls are 5 megohms each with a 100,000 ohm stop. Each control is connected between the control grid and the screen grid of the three guns."
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