. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . ible for the A operators to showfavoritism. The nature of telephone traffic is such that it is impossiblefully to realize all of these conditions, but several kinds of equipmentwhich have been more or less successfully used to secure the ideal con-dition will be described in the remaining portion of this chapter. Christensens Electropneumatic Selector.—This selector which is theinvention of Mr. P. V. Christensen, assistant chief engineer of the Copen-hagen Telephone Company, Copenhagen, Denmark in 1904 is
. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . ible for the A operators to showfavoritism. The nature of telephone traffic is such that it is impossiblefully to realize all of these conditions, but several kinds of equipmentwhich have been more or less successfully used to secure the ideal con-dition will be described in the remaining portion of this chapter. Christensens Electropneumatic Selector.—This selector which is theinvention of Mr. P. V. Christensen, assistant chief engineer of the Copen-hagen Telephone Company, Copenhagen, Denmark in 1904 is used inScandinavia as an auxiliary to manual switchboards to distribute theload among A operators and among B operators. The systemfor promoting better distribution among A operators is called theOperators Aid System and is an application of the Christensen selec-tor devised by Director Fr. Johannsen of the Copenhagen Telephone 208 AUTOMATIC TELEPHON Y Company, while the system for securing better distribution of the workamong £ operators is called the Automatic Order Wire Fig. —View from below of three Chris- Fig. 186.—View from above of Christensentensen pneumatic selectors. pneumatic selectors.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttelephone, bookyear19
