Wireless-telegraphy Sentence Examples
Hertz and of wireless telegraphy were investigated by him in 1853.
Encouraged by this success, he even made the further suggestion that the remaining metallic portion of the circuit might perhaps some day be abolished and a system of wireless telegraphy established.'
Highton in experiments described in 1872, also revived the same suggestion for wireless telegraphy.
This method of communication by magnetic induction through space establishes, therefore, a second method of wireless telegraphy which is quite independent of and different from that due to conduction through earth or water.
Many other more or less imperfect devices - such as those of Mahlon Loomis, put forward in 1872 and 1877, and Kitsee in 1895 - for wireless telegraphy were not within the region of practically realizable schemes.Advertisement
Up to 1895 or 1896 the suggestions for wireless telegraphy which had been publicly announced or tried can thus be classified under three or four divisions, based respectively upon electrical conduction through the soil or sea, magnetic induction through space, combinations of the two foregoing, and lastly, electrostatic induction.
The object which Marconi had in view was not merely the detection of electric waves, but their utilization in practical wireless telegraphy.
In many cases additional condensers or inductance coils are inserted in various places so that the arrangement is somewhat disguised, but by far the larger part of the electric wave wireless telegraphy in 1907 was effected by transmitters having antennae either inductively or directly coupled to a closed condenser circuit containing a spark gap.
In practical wireless telegraphy the antenna is generally a collection of wires in fan shape upheld from one or more masts or wooden towers.
When used as a receiver for wireless telegraphy Marconi inserted the oscillation coil of this detector in between the earth and a receiving antenna, and this produced one of the most sensitive receivers yet made for wireless telegraphy.Advertisement
Marconi's success in bridging the English Channel at Easter in 1899 with electric waves and establishing practical wireless telegraphy between ships and the shore by this means drew public attention to the value of the new means of communication.
Hence it will be seen that the difference between various forms of the so-called spark systems of wireless telegraphy is not very great.
In July and August 1899 the Marconi system of wireless telegraphy was tried for the first time during British naval manoeuvres, and the two cruisers, " Juno " and " Europa," were fitted with the new means of communication.
In this way he was able to produce an apparatus which created continuous trains of oscillations suitable for the purposes of wireless telegraphy.
They connect all the important cities, towns and ports, but cover only a small part of the republic. The cost of erecting and maintaining telegraph lines in the sierra and montana regions is too great to permit their extensive use, and the government is seeking to substitute wireless telegraphy.Advertisement
Fitzgerald was the first to attempt to measure the length of electric waves; Helmholtz put the problem into the hands of his favourite pupil, Heinrich Hertz, and the latter finally gave an experimental demonstration of electromagnetic waves, the "Hertzian waves," on which wireless telegraphy depends, and the velocity of which is the same as that of light.
He was specially noted for his discovery of the electrical conductivity of bismuth and other metals, and for his pioneer work in wireless telegraphy.
Under the Wireless telegraphy Act 1949, the use of wireless telegraphy equipment in the UK must be licensed unless it is specifically exempt.
The young inventor, who was born in Italy 24 years ago, has been experimenting with wireless telegraphy for the last four years.
Nevertheless, transoceanic wireless telegraphy over long distances, such as those across the Atlantic and Pacific oceans, is a matter to be reckoned with in the future, but it remains to be seen whether the present means are sufficient to render possible communication to the antipodes.Advertisement
Leyden jars are now much employed for the production of the high frequency electric currents used in wireless telegraphy (see Telegraphy, Wireless).
By wireless telegraphy she sent out signals of distress, and several liners were near enough to catch and respond to the call.
The intention is to permit the use of such devices without the need to hold a Wireless Telegraphy license.
A consultation document on the proposal to impose fixed penalty notices for summary wireless telegraphy act 1949 offenses.
Under the Wireless Telegraphy Act 1949, the use of wireless telegraphy equipment in the UK must be licensed unless it is specifically exempt.Advertisement