Abstract :
More than 25 years have passed since the discovery of the properties of copper oxide for rectifying alternating current. During the intervening time much has been learned of the characteristics of the rectifier, and improved manufacturing methods have made possible a continually widening circle of application. From small-current low-voltage rectifiers, applications have grown to include extremes in voltage and current, small rectifiers for use in instruments, and voltage limiters and modulators for use in communication work.
