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It does, however, transform the variable electric currents of the wireless receiving set into sound vibrations in a most wonderful manner. A telemegafone of either kind is formed of: a telephone receiver of large proportions, a step-down induction coil, and a 6 volt storage battery that energizes a powerful electromagnet which works the diaphragm.
It is an interesting fact that it was not in the form of the step-down alternating-current transformer that Faraday's discovery of voltaic-current induction was first utilized, but in the form of a step-up transformer, or what was then ordinarily called an induction coil.
This pressure is generated by a steam-driven alternating-current generator and is transmitted over the conductors to sub-stations, where by means of step-down transformers, the pressure is dropped to, say, 600 volts alternating current which by rotary converters is turned into direct current for the street mains, for feeders of railways and for charging storage batteries which in turn give out direct current at times of heavy demand.
The enormous use of both step-up and step-down transformers transformers which respectively induce currents of higher and of lower electromotive forces in their secondary coils than are passed through their primaries shows the great practical value of this invention.
The high pressures required for the economical use of transmission lines necessitates the employment of transformers at each end of the line; namely, step-up transformers at the transmitting end, to raise the voltage delivered by the generators, and step-down transformers, at the receiving end, to lower it for use in the various translating devices.
It does, however, transform the variable electric currents of the wireless receiving set into sound vibrations in a most wonderful manner. A telemegafone of either kind is formed of: a telephone receiver of large proportions, a step-down induction coil, and a 6 volt storage battery that energizes a powerful electromagnet which works the diaphragm.
"A pretty to do, indeed," his wife assured him. "Dost want her running off some fine night with thy groom?" "Tush, Matilda!" responded Mr. Meredith. "'T is impossible." "Just what my parents said when thou camest a-courting." "I was no redemptioner." "'T was none the less a step-down for me," replied Mrs. Meredith, calmly. "And I had far less levity than "
It is already claimed that with the use of currents of high voltage for carrying the power, and "step-down transformers" converting these into a suitable medium for the driving of machinery, a fairly economical transmission can be ensured along a distance of 100 miles.
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