Tālruņa 3D modeļi

Rāda 1-24 no 96 rezultātu

Tālrunis ir telekomunikāciju veids, kas ļauj pārraidīt un saņemt apraidi no attāluma, izmantojot elektriskos signālus (pārraida pa vadiem) vai radio signālus.

 

vēsture

Tālruņa izgudrojums ir daudzu cilvēku darba rezultāts, un tās autorību nevar attiecināt uz vienu konkrētu personu.
The first prototype of the modern phone was patented in 1876 by the American inventor Alexander Bell. Bell’s tube served a transmission and reception of sound. It did not have a call function, and the call of the subscriber was through the handset with a whistle. The range of this device did not exceed 500 meters. For the lead in the invention of the phone, in addition to Bell, claimed about three dozen scientists, including McDonato, Edison, Gray, Dolber, Blake, Irvine, and Felker. This led to a series of litigation in the United States, which only confirmed the collective nature of the invention, recognizing the superiority of the various inventors for individual items.

In 1877 the inventor Wadow used a telegraph key to call the subscriber. In the same year, the German company Siemens and Halske began to manufacture telephone sets with two telephone tubes – one for reception, the other – for the transmission of speech.

Thomas Edison izgudroja oglekļa mikrofonu, kas strādāja gandrīz nemainīgs līdz 1980.

The history of the further phone development includes the invention of an electric microphone, which replaced the coal, loudspeaker, tone dialing, digital compression of sound, new telecommunication technologies (IP telephony, ISDN, DSL, cellular communications, DECT).

 

Non-electric “phones”

In general, the phone is a mechanism that has the ability to transmit sound over a long distance. The very first phones were mechanical devices based on sound transmission using air or other physical means, as opposed to electrical devices that based on electromagnetic signals.

Saskaņā ar Pekinas vēstules vēstuli, 968 ķīniešu Kung Fu-Wing izgudrotāji izgudroja ththtsein, kas, iespējams, pārraidīja valodu caur caurulēm. Šodien tiek izmantotas sarunas caur caurulēm.

Virves tālrunis bija zināms arī gadsimtiem ilgi, savienojot divas diafragmas ar virvi vai ar vadu, kas pārnes skaņu no viena gala uz otru ar virves vibrācijām.

Populārākie tālruņu zīmoli:

  • ābols
  • Alcatel
  • Ericsson
  • Huawei
  • Kyocera
  • spožs
  • Marconi
  • Motorola
  • Nokia
  • Nortel Networks
  • palmOne / Handspring
  • samsung
  • Siemens AG
  • Sony Ericsson