Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 536
in a vertical direction. This size is used by the Kel-logg Company on all switchboards having an ultimate capacity ofnot over 7200 lines. There is another size—§ inch between cen-ters in each direction—which is used for exchanges having an ulti-mate capacity of not over 12,000 lines. The smallest… … FIG. 361.-STROMBERG-CAELSON MULTIPLE JACKS. Company of Los Angeles, Cal. The ultimate capacities of theseswitch-boards in each case is 18,000 lines. The Stromberg-Carlson Company have recently made a some-what radical departure from what is generally considered standardconstruction by mounting…
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