Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 235
\-ettc, Ind., which is shown in Fig. 197. Inthis switchboard the drops and jacks are mounted in strips of ten,the strips being vertical instead of horizontal. Each strip of tendrops and jacks also carries with it a portion of the plug shelf, to-gether with a pair of cords and plugs, ringing and… … FIG. ISC.-TWO-rOSITTON .STROMr.ERG-C.vRLSOX BOARD WITHTERMINAL CABINET. ten lines at any time, it is only necessary to secure one of these unitsinto the framework, this being accomplished by means of fourmachine screws. With this arrangement th& proper proportion (10per cent.) of the pairs of…
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