Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 407
each section ofthe switchboard to a separate bus bar, in series with which is a J^-ohm 5045 40 35 ^30 zI-< |25 a o °20a a I 10 b 12M. 2a.m. 4A.M. 6A.M. 8A.M. 10a.m. 12m. 2P.M. 4TIME OF DAY p.m. 6p.m. 8p.m. 10 p.m. 12m. Fig. 301.—Typical load curve of a central office for a 24-hour period. relay… … . Fig. 302.—Traffic recording machine. The easiest way that has been used to ascertain the maximum trafficthrough a common battery manual switchboard is to insert a recordingammeter in the leads supplying talking and operating current. By takingthe peak of the ammeter curve and dividing it by the…
Telephone
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