An Explanation of Wireless Telegraphy ...

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U.S. Government Printing Office, 1902 - Telegraph, Wireless - 17 pages
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Page 5 - E is the scape-wheel driven by the force of the clock-weight or spring, and mn the escapement, moved by the forked arm...
Page 8 - Т sliding on rods, as in fig. 16, and let the two rods be connected to the terminals of the secondary circuit of an induction coil. When the spheres are charged above the sparking potential of the air gap then spark1 See any text-book on physics.
Page 1 - ... two bodies. The body sending out energy disturbs the medium contiguous to it, which disturbance is communicated to adjacent parts of the medium, and so the movement is propagated outward from the sending body through the medium until some other body is affected.
Page 3 - It is commonly observed that a vibrating body sets up vibrations in another body, as for instance when one tuning fork responds to the vibrations of another when the tuning forks have the same note, or are in tune.
Page 1 - In this kind of telegraphy a sending station is equipped with an apparatus for generating and transmitting electric waves and a receiving station is equipped with apparatus which will enable it to detect these waves.
Page 5 - I sists of a wide-necked bottle or jar, coated inside and out with tinfoil to within a few inches of the top.
Page 3 - ... have the same note, or are in tune. The transmission of messages by wireless telegraphy is effected in much the same way.
Page 1 - ... by the propagation of energy from point to point through a medium which fills the space between the two bodies.
Page 1 - ... wave motion. When the clapper strikes the lip of a bell it starts the lip into vibrations which in turn cause waves in the air.
Page 8 - ... the secondary is larger than the number of turns in the primary.

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