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Updated: May 7, 2025
As he lay wondering whether an attempt to regain his feet would be worth while, he seemed to hear the distant but strenuous ringing of an electric bell, and almost smiled at the absurdity of such a fancy in such a place. The thought carried him back to the electrical laboratory of the Institute, and he began to dream that he was still a student of ohms, volts, and amperes.
Swinton uses a "high frequency current," obtained from apparatus similar to that of Tesla, and shown in figure 100, namely, a high frequency induction coil insulated by means of oil and excited by the continuous discharge of twelve half-gallon Leyden jars charged by an alternating current at a pressure of 20,000 volts produced by an ordinary large induction coil sparking across its high pressure terminals.
They can now be purchased at all prices from a shilling upwards, and give about 1-1/2 volts when in good condition. One cell at each end will suffice for short distances, or for considerable distances if large conductors are used. If a single cell fails to work the buzzer strongly through the circuit, another cell must be added.
These machines were making about 1,200 stitches per minute an average of 4 volts per 100 stitches.
We can feed normal current in, or 440 volts, and we can cross-link the circuits any way we like." Scotty checked Rick's work, then took the switch handle. He touched the contacts briefly, and there was a quick pulse of light as the roof lighted up and went dark again. "I'll stand by here," Scotty said. "You stand by at the end of the runway. Are we going to use gasoline?" "We'll have to.
And Everett's laugh that greeted and accepted her unexpected meekness rang through the hall and brought a commotion in answer. The wee dogs, keen both of ear and scent, shot like small electric volts from Stonie's couch, hurled themselves through the hall and sprang almost waist-high against Everett's side in a perfect ecstasy of welcome.
At the generating station at Menlo Park four Z dynamos of 110 volts were used, connected two in series, in multiple arc, giving a line voltage of 220. "The motor was located in the front part of the locomotive, on its side, with the armature shaft across the frames, or parallel with the driving axles.
Obviously, the Plumies did. They'd handled the Niccola's rockets with beams which charged the golden ship to billions of volts. And when the silicon-bronze Plumie ship touched the cobalt-steel Niccola why that charge had to be shared. It must have been the most spectacular of all artificial electric flames. Part of the Niccola's hull was vaporized, and undoubtedly part of the Plumie.
The filament terminal takes a current of 7.5 volts and this is supplied by another secondary coil of the transformer. This rectifier tube delivers a direct current of 20 watts at 350 volts. The price is $7.50. The Filter Condensers. These condensers are used in connection with the reactance coil to smooth out the pulsating direct current after it has passed through the rectifier tube.
In our cities and towns where the current has only to go a short distance from the power house, the conductors are generally placed in cables underground and the maximum electro-motive force scarcely ever exceeds 11,000 volts.
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