Published: Jan 1961
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A recent developmental program at Bell Telephone Laboratories in connection with phosphor screens for use in a cathode ray type scanner tube required the use of a room with a low dust level. Midway in this program it became necessary to change the location of this operation from one room to another. The air supply to the original room had been filtered by an electrostatic precipitator, while at the new location a supply air filter of the high-efficiency impingement type was used.
Bell Telephone Laboratories, Inc., Murray Hill, N. J.
Paper ID: STP41219S