HEBELL SYSTEM 



Jechnical ournal 



VOTED TO THE SC I E N T I FIC^^->^ AND ENGINEERING 

 PECTS OF ELECTRICAL COMMUNICATION 



LUME XXXIII JANUARY 1954 NUMBERl 



DESIGN OF RELAYS 



Introduction ^ (jj . A. c. Keller 1 



Relay Measuring Equipment ^' t;'^ . "• ^- wagar 3 



^lagnetic Design of Relays . r. l. peek, jr. ajTo-'h'. n. wagar 23 

 Analysis of Measured Magnetization and Pull Characteristics 



R. L. PEEK, JR. 79 



Estimation and Control of the Operate Time of Relays 



Part I — ^Theory R. l. peek, jr. 109 



Part II — Design of Optimum Windings m. a. logan 144 



Principles of Slow Release Relay Design r. l. peek, jr. 187 



Economics of Telephone Relay Applications h. n. wagar 218 



Symbols 257 



Abstracts of Bell System Technical Papers Not Published in this 



Journal 260 



Contributors to this Issue 274 



COPYRIGHT 1954 AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



