. Telephones and telegraphs: 1902 : [and Municipal electric fire alarm and police patrol systems] . ce drop, is bridged across the cord essential features of the switchboard are the sub-scribers terminal (jack and drop) and the cord circuit. The complete switchioard.—A complete switchboardis formed by assembling as many sets of the apparatusdescribed as may be necessary for the are placed in a cabinet, shaped essentially as inFig. 1 on plate facing page 46, and containing a verticalpanel, in the upper part of which drops are placed. Thelower section of the panel cont
. Telephones and telegraphs: 1902 : [and Municipal electric fire alarm and police patrol systems] . ce drop, is bridged across the cord essential features of the switchboard are the sub-scribers terminal (jack and drop) and the cord circuit. The complete switchioard.—A complete switchboardis formed by assembling as many sets of the apparatusdescribed as may be necessary for the are placed in a cabinet, shaped essentially as inFig. 1 on plate facing page 46, and containing a verticalpanel, in the upper part of which drops are placed. Thelower section of the panel contains the jacks. Nextcomes the cord shelf with its cords and keys, the wholecabinet being so arranged that the shelf is of conven-ient height for the operator when in a sitting positionwith the drops and jacks arranged in front of herin such a manner as to be within the easiest possiblereach. This illustration further shows the method ofconnecting lines by inserting a pair of plugs and cordsinto the jacks. The cords pass through holes cut inthe shelf and are furnished with pulley weights whose.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttelephone, bookyear19
