Tunzelmann, George William von, 1856- · New York, Scribner & Welford · leaf 138
Thetwo piles form portions of the twocircuits required to connect thetransmitting with the receivingstation, one pile being containedin each circuit. The transmitting pen consists ofa rod, shown in the diagram, whichis pivoted at its lower end betweenthe two piles, and is provided withpressure… … 126 ELECTRICITY IN MODERN LIFE. When the instrument is put together ready for use, therod passes through a small square hole in the top of thecase, and the operator writes by moving this stylus just ashe would a pen. As the pressure points of the transmitting-rod press morestrongly against either…
Electric industries · Electricity
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