Western Electric Noiseless Recording<!--<xref ref-type="fn" rid="fn110.5594_J05521">*</xref>-->

Abstract

The Western Electric method of noiseless recording with the light valve is described. The general principles are discussed, the circuit diagram is explained, and the method of adjusting the device for service described. The photographic characteristics of film are considered, and their application in noiseless recording is shown in some detail.