Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 764
on the lower end of an arm A. The arm A is slotted and mountedon a pivot as shown, and when S is rotating, A will be turned to one side orthe other, defending upon the direction of rotation of S, until it hits on thestop B, and will then remain against the stop and reciprocate up and downfrom the… … The receiver consists of two pivoted pointers, connected as shown to twoelectro-magnets and marked Astern and Ahead. From the connections shown, it is seen that at each rotation of the pro-peller shaft the pointer corresponding to the direction of rotation will makea movement, and at the same time…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-509-355.webp)
