Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 47
eproduce in the new circuit the same impulses ofcurrent that are coming over the line. The relays used by Morseabout 1840 weighed several hundred pounds. The modern relay,although the same in general principle, has been greatly improved ineffectiveness and reduced in size. Several forms of relays… … Fig. 13. Modern Morse Relay with Rack and Pinion AdjustmentCourtesy of Postal Teleyraph-Cable Company standard relays with resistance of 150 or 250 ohms are used. Fig.18 shows a form of standard relay with the usual spring tension andadjustment for the magnet, by means of which the sensitiveness…
Electrical engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
