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52may BSTJ p443 - Experimental Electronically Controlled Auto Switching Sys - with "Essex" Subscriber Set - Annotated

26 pages. ECSS. An Experimental Electronically Controlled Automatic Switching System, By W. A. MALTHANER AND H. EARLE VAUGHAN, Bell System Technical Journal (BSTJ), May 1952.

Annotated for reference in conjunction with the description of the "Essex" telephone on page 4-11 of "Telephone Dials and Pushbuttons" by Stanley Swihart.

A concept set with calculator-style dial for pre-set dialing is described in both articles, and photos of a set can be viewed here:
http://www.paul-f.com/weproto.html#Other

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