Inside Out Library · Explore
Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 180
th contact arms occupythe same relative positions at all times, that is, they mustrotate synchronously. Such rotation is secured by the © »—0 0 d ^ ® D O- Fig. 2. use of manually-started motors having tooth-wheel ironarmatures and periodically excited field magnets, the con-tact arms being mounted… … DISTRIBUTINGRELAYS PRINTINGMAGNET to that at the other station one or more governing impulsesduring each revolution of the arm, which impulses controlthe speed of the distant motor. The circuit arrangements for securing synchronous rota-tion of the distributors and for signalling over one of…Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
More pictures from Telegraph engineering : a manual for practicing telegraph engineers and engineering students
More like this
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-343-141.webp)
