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 62
ch a case, the lineswitches are divided into two sets of 50each and one master switch is mounted for controlling the two guideshafts of each set. The design of the upright contemplates this, for thelineswitches are mounted on two hinged shelves, each of which carriesone-half of the switches and is… … Fig. 43.—Scheme of master-switchcontrol of Keith lineswitches. 46 AUTOMATIC TELEPHONY mounted upon it, although one is disconnected and the master shafts areall placed under the control of the other by means of the connecting rodwith a turnbuckle at its center which links together the lower ends…
Telephone
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