American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 522
ice for the purpose is outlined in Figs. 325/, 325^. It consists of a drum-shaped wheel 1.6 inch in diameter, on the periphery of which are placed smallteetii d of the proper size, and so placed as to mesh into the central holes of theperforated strip. This wheel is carried on a vertical shaft d,… … THEORY OF FEED-WHEKL PERFORATOR. There are arranged vertically around the edge of the feed-wheel a number ofmovable pins F, frictionally held in any position by the close-fitting spiral springsshown. These pins normally project below, but may be raised above the uppersurface of the feed-wheel by…
Telegraph
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