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A Scene From America's Projector Carbon Center...
Equipment for coating carbons with copper
it,
Coating' projector carbons with the right amount of copper is a top-billing production step"
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This equipment performs the important task of coating projector carbons with copper— not for eye appeal, but for the vital purpose of assuring more dependable screen lighting. The s;a Moriey coating helps conduct current from the jaws of the lamp to the arc. For maximum light efficiency the copper coating must be of precision thickness — no more — no less !
From the coating operation at National Carbon's plant in Fostoria, Ohio, projector carbons move on to an automatic resistance test, where a direct reading instrument measures in ohms
-says SID MORLEY
National Carbon Sales Engineer
per-inch the coating on each carbon. If the coating is too thin or too thick, the unwanted carbon is ejected from the line.
How is this rigid test related to good fighting? First, if the coating is too thin, the carbon might spindle back to the holder, resulting in freezing and a possible lamp shutdown. Secondly, if too thick, it might produce copper dripping and cause the arc to wander.
In coating and all other manufacturing steps, National Carbon utilizes today's most reliable quality control methods. We want to be sure your patrons get the finest screen lighting that projector carbon money can buy !
Contact Mr. National Carbon
UNION CARBIDE
"National" and "Union Carbide" are registered trade-marks for products of
NATIONAL CARBON COMPANY
Division of Union Carbide Corporation • 270 Park Avenue • New York 17, N. Y. In Canada: Union Carbide Canada Limited, Toronto