Abstracts of Bell System Technical Papers* 

 Not Published in This Journal 



Experimental Verification of the Theory of Laminated Conductors. H. S. 

 Black^ C. O. Mallinckrodt^ and S. P. Morgan^ LR.E., Proc, 40, pp. 

 902-905, August, 1952. 



Clogston has discovered that if a conductor is properly laminated, there exists 

 a particular phase velocity along the conductor for maximum penetration of the 

 fields and minimum loss due to skin effect. An experimental coaxial Hne was con- 

 structed whose center conductor was laminated and whose phase velocity could 

 be varied by changing the dielectric constant of the main dielectric. As predicted 

 by theory, the measured attenuation was critically dependent upon phase velo- 

 city. With optimum phase velocity the attenuation, though greater than pre- 

 dicted by theory, was less than that of a conventional coaxial cable of the same 

 dimensions and same main dielectric. A theoretical analysis of the experimental 

 laminated conductor is described in an append x. 



ASTM Standards — Their Effect on Plastics Technology. R. Burns^ 

 A.S.T.M. Bull, No. 183, pp. 78-80, July, 1952. 



Typical Block Diagrams for a Transistor Digital Computer. J. H. 

 Felker^ A.I.E.E., Trans., Commun. & Electronics Sect., No. 1, pp. 

 175-182, July, 1952. 



The first electric digital computers were built around the properties of relays. 

 The superior speed capabilities of vacuum tubes has led in recent years to their 

 use in new computer designs to replace relays. Because of the small size, low 

 power consumption, and expected long life of transistors, it now appears that 

 the transistor will replace the vacuum tube as a computer element. This paper 

 presents a study of binary computer functions with recommended mechaniza- 

 tions that were selected because they appeared to be readil}^ attainable with 

 transistors now under development. Block diagrams are presented of switches, 

 memory units, arithmetic units, and other basic components. Estimates are 

 given for the number of parts required in the units. It is concluded that a high- 

 performance all-semiconductor computer can be built with germanium diodes 

 and transistors. 



* Certain of these papers are available as Bell System Monographs and may 

 be obtained on request to the Publication Department, Bell Telephone Labora- 

 tories, Inc., 463 West Street, New York 14, N. Y. For papers available in this 

 form, the monograph number is given in parentheses following the date of pub- 

 lication, and this number should be given in all requests. 



^ Bell Telephone Laboratories. 



^ Hughes Aircraft Company, Culver City, California 



255 



