The History And Progress of the Electric Telegraph: With Descriptions of ...
The History And Progress of the Electric Telegraph: With Descriptions of ...
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But the most important improvement introduced into the construction of this apparatus was in the substitu- Digitized by VjOOQIC THE ELECTRIC TELEGRAPH* 53 tion of magneto -electric currents for those of a voltaic battery.
The sending apparatus, so modified^ is shown in Fig. 22.
It consisted of a permanent horse-shoe magnet, or combina- tion of magnets, fixed to the base board b, between the poles of which was placed a vertical shaft, supporting, on opposite sides, the coils c c' of an electro-m...agnet. They were so arranged that, on turning the shaft, the cores of c S at the same moment approached, and left the poles of the perma- nent magneti The ends of the coils bf wire round the Fig. 22.
electro-magnet were connected, by means of a sliding contact underneath, with the terminal screws e and/. On the top Of the shaft was a pinion d, locking into the tooth- wheel Vi\ The number of teeth of the wheel vo were in relation to those of the pinion n, so that one complete revolution of w would cause d to revolve half as many times as there were letters, numerals, &c., engraved on the corresponding dials of the sending and receiving instruments.
What to read after The History And Progress of the Electric Telegraph: With Descriptions of ...?
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To quickly assess the difficulty of the text, read a short excerpt:
But the most important improvement introduced into the construction of this apparatus was in the substitu- Digitized by VjOOQIC THE ELECTRIC TELEGRAPH* 53 tion of magneto -electric currents for those of a voltaic battery.
The sending apparatus, so modified^ is shown in Fig. 22.
It consisted of a permanent horse-shoe magnet, or combina- tion of magnets, fixed to the base board b, between the poles of which was placed a vertical shaft, supporting, on opposite sides, the coils c c' of an electro-m...agnet. They were so arranged that, on turning the shaft, the cores of c S at the same moment approached, and left the poles of the perma- nent magneti The ends of the coils bf wire round the Fig. 22.
electro-magnet were connected, by means of a sliding contact underneath, with the terminal screws e and/. On the top Of the shaft was a pinion d, locking into the tooth- wheel Vi\ The number of teeth of the wheel vo were in relation to those of the pinion n, so that one complete revolution of w would cause d to revolve half as many times as there were letters, numerals, &c., engraved on the corresponding dials of the sending and receiving instruments.
What to read after The History And Progress of the Electric Telegraph: With Descriptions of ...?
You can find similar books in the "Read Also" column, or choose other free books by Robert Sabine to read onlineMoreLess
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