Bell and His Telephone The earlier telephones were made by brass(黄铜) and wood. In the early 1900s, telephones were only used by noblemen.(贵族) the first telephone used in the war Wall telephones were popular in the 1920s. famous telephones made in France in the 1930s This kind of ...
Originally developed in the 1920s, CinemaScope was the first filmmaking process to allow for the shooting and projection of wide-screen films without distortion. It became widespread in the 1950s, when filmmakers began using it to draw audiences away from the booming television market. ...
In the 1920s, Ericsson continued to work in the international market, in order to secure concessions in various locations. To begin with, investments were made primarily in Mexico, Argentina, Poland and Finland, which were countries where Ericsson had already been involved in ...
In 1902, in order to increase the range of telephone communication, a method was developed of artificially increasing the inductance of the telephone cable to diminish the attenuation of the signal (seePUPIN SYSTEMandKRARUP LOADING). In the 1920’s, repeaters were first used on telephone lines ...
Telephone-booth, in reference to call boxes with direct lines to police stations in big cities, is by 1883;telephone-boxin the same sense is from 1880. By 1890 both were used of installations in businesses, banks, etc., for making private calls.Telephone-kiosk, generally more common in U...
A rotating number selector on early telephones (and TVs). Introduced in the early 1900s, rotary phones were commonly used from the 1920s until the 1960s, when dial phones were gradually replaced with push button phones (seeTouch-Tone). ...
In subject area: Computer Science A telephone network is a circuit-switched network that forms a major part of the worldwide telecommunications infrastructure, allowing real-time communication-oriented services such as voice telecommunications. AI generated definition based on: Encyclopedia of Physical Scie...
Close-up of baby girl in baby cot 4K Close-up of baby girl in baby cot 4K Cute babygirl sitting in baby walker More stock footage ofWavebreakmedia Ltd's portfolio HD HD HD HD HD HD HD 4K Related categories PeopleChildren Browse categories ...
In the1920s Coca-cola pioneered in producing “six-packs,” cardboard cartons that held six bottles of the drink.In 1929 a distinctively shaped fountain glass became standard and helped to advertise the popularity of the drink. The international growth of Coca-Cola began in 1900, when a son...
This invention relates to telephone systems and s more particularly to such systems with four-wire t transmission circuits. The object of the present invention resides in e the improvement of facilities for controlling transmission quality over trunks and lines from a manually operable switchboard......