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 46
Fig. 11. Standard Morse Local SounderCourtesy of Postal Telegraph-Cable Company louder and clearer sound. Fig. 11 illustrates a standard sounder foruse in connection with a relay. Such sounders have a resistance of4 or 5 ohms and are usually operated with a current of about a quar-ter of an ampere.… … Fig. 12. Main Line Sounder with Hack ami ilnion ^VdjusimeiiiCourtesy of Postal Telegraph-Cable Company number of turns and smaller wire in the magnet winding. It ispossible to make sounders with a sufficiently large number of turns 36 26 MODERN LAND AND SUBMARINE TELEGRAPHY on suitable magnet cores…
Electrical engineering
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