United States or Niue ? Vote for the TOP Country of the Week !
In wireless telegraphy it is absolutely necessary that the transmitter of the electro-magnetic waves should be brought into perfect harmony with the receiver without that condition it is impossible to communicate at a distance; again, a heavy pendulum or swing can, by a certain force, be pushed, say an inch, from its position of rest, and each successive push will augment the swing, but only on one condition, namely, that the force is applied in sympathy with the pendulum's mode of swing; if the length of the pendulum is 52 feet, the force must be applied only at the end of each eight seconds, as, although the pendulum at first is only moving one inch, it will take four seconds to traverse that one inch, the same as it would take to traverse 10 feet or more, and will not be back at the original position till the end of eight seconds; if the force is applied before that time the swing of the pendulum would be hindered instead of augmented.
Most of those Ermetynes wind up being dead-brained by some loving relative, and apparently they have to know how to whip up a sharp brew of poison before they're let into kindergarten. Lyad's been top dog among them since she was eighteen " His head turned. A bell had begun pinging in the next room. He stood up. "Probably Mantelish's outfit on the transmitter," he said.
After Professor Hughes had published his discovery of the microphone, Edison, recognising, perhaps, that it and the carbon transmitter were based on the same principle, and having learnt his knowledge of the world in the hard school of adversity, hastily claimed the microphone as a variety of his invention, but imprudently charged Professor Hughes and his friend, Mr.
This was the work of Thomas Edison, and was so much better than Bell's transmitter that it enabled the Western Union to offer much better telephonic equipment. As we have seen, Bell's transmitter and receiver were very similar, being about the same as the receiver now in common use. In his transmitter Edison placed tiny bits of carbon in contact with the diaphragm.
The only part of the sighting that still wasn't explained was the radar pickup on the F-86's gun sight. Lieutenant Flues checked around, did a little experimenting, and found out that the small transmitter box on a radiosonde balloon will give an indication on the radar used in F-86 gun sights. To get a final bit of proof, Lieutenant Flues took the gun camera photos to the photo lab.
An oscillation transformer is a loose coupled tuning coil and it consists of a primary coil formed of a number of turns of copper wire wound on a fixed insulating support, and a secondary coil of about twice the number of turns of copper wire which is likewise fixed in an insulating support, but the coils are relatively movable. The Vacuum Tube Telegraph Transmitter.
In a hurry, too, he says. "I'll be right there, Dad. Coming, Dave?" Darrin nodding, the two chums ran down the stairs to the bookstore. Dick caught up the transmitter and answered. "This is Dick Prescott, Mr. Bradley." "Then, for goodness' sake, can you hustle up here?" "Of course I can." "Ask your father if you can take up a late night job for me. Then come on the jump.
Both transmitter and receiver consist of a permanent magnet of hardened steel around one end of which is placed a coil of insulated wire. In front of this coil a diaphragm, or thin plate, of soft iron, is so supported as to be capable of freely vibrating towards and from the magnet pole. The operation of the transmitting instrument is readily understood in the light of Faraday's discovery.
The telephone men, most of them, at least, chose development; and the brilliant inventions that afterwards made some of them famous were compelled by sheer necessity and desperation. The first notable improvement upon Bell's invention was the making of the transmitter, in 1877, by Emile Berliner. This, too, was a romance.
The usual type of wireless telegraph transmitter employs a disruptive discharge, or spark, as it is called, for setting up the oscillating currents in the aerial wire system and this is the type of apparatus described in this chapter.
Word Of The Day