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#1
Faraday and Henry work in electromagnetic and upstart technological advancement period -
#2
Caseli invents Pantelegraph and becomes first perosn to transmit still image over wires -
#3
Scientists May and Smith experiment with selenium and light, this reveals the possibility for inventors to transform images into electronic signals. -
#4
Boston civil servant George Carey was thinking about complete television systems and in 1877 he put forward drawings for what he called a selenium camera that would allow people to see by electricity.
Eugene Goldstein coins the term "cathode rays" to describe the light emitted when an electric current was forced through a vacuum tube. -
#5
Scientists and engineers like Paiva, Figuier, and Senlecq were suggesting alternative designs for Telectroscopes. -
#6
Inventors Alexander Graham Bell and Thomas Edison theorize about telephone devices that transmit image as well as sound.
Bell's Photophone used light to transmit sound and he wanted to advance his device for image sending. -
#7
Sheldon Bidwell experiments with his Telephotography that was similiar to Bell's Photophone. -
#8
Paul Nipkow sends images over wires using a rotating metal disk technology calling it the electric telescope with 18 lines of resolution. -
introduction to 20th century
Soon after 1900, the momentum shifted from ideas and discussions to physical development of television systems. Two major paths in the development of a television system were pursued by inventors. -
#9
At the World's Fair in Paris, the first International Congress of Electricity was held. That is where Russian Constantin Perskyi made the first known use of the word "television." -
#10
Lee de Forest invents the Audion vacuum tube that proved essential to electronics. The Audion was the first tube with the ability to amplify signals.
Boris Rosing combines Nipkow's disk and a cathode ray tube and builds the first working mechanical TV system. -
#11
Campbell Swinton and Boris Rosing suggest using cathode ray tubes to transmit images. Independent of each other, they both develop electronic scanning methods of reproducing images. -
#12
Vladimir Zworkin patents his iconscope a TV camera tube based on Campbell Swinton's ideas. The iconscope, which he called an electric eye becomes the cornerstone for further television development. Zworkin later develops the kinescope for picture display (aka the reciever). -
#13
American Charles Jenkins and John Baird from Scotland, each demonstrate the mechanical transmissions of images over wire circuits.
John Baird becomes the first person to transmit moving silhouette images using a mechanical system based on Nipkow's disk. Charles Jenkin built his Radiovisor and 1931 and sold it as a kit for consumers to put together (see photo to right). Vladimir Zworkin patents a color television system. -
#14
John Baird operates a television system with 30 lines of resolution system running at 5 frames per second. -
#15
John Baird operates a television system with 30 lines of resolution system running at 5 frames per second. -
#16
The Federal Radio Commission issues the first television station license (W3XK) to Charles Jenkins. -
#17
Vladimir Zworkin demonstrates the first practical electronic system for both the transmission and reception of images using his new kinescope tube.
John Baird opens the first TV studio, however, the image quality was poor. -
#18
Charles Jenkins broadcasts the first TV commercial.
The BBC begins regular TV transmissions. -
#19
Iowa State University (W9XK) starts broadcasting twice weekly television programs in cooperation with radio station WSUI. -
#20
About 200 hundred television sets are in use world-wide.
The introduction of coaxial cable, which is a pure copper or copper-coated wire surrounded by insulation and an aluminum covering.These cables were and are used to transmit television, telephone, and data signals. The first experimental coaxial cable lines were laid by AT&T between New York and Philadelphia in 1936. The first regular installation connected Minneapolis and Stevens Point, WI in 1941. -
#21
CBS begins its TV development.
The BBC begins high definition broadcasts in London. Brothers and Stanford researchers Russell and Sigurd Varian introduce the Klystron. A Klystron is a high-frequency amplifier for generating microwaves. It is considered the technology that makes UHF-TV possible because it gives the ability to generate the high power required in this spectrum. -
#22
Vladimir Zworkin and RCA conduct experimentally broadcasts from the Empire State Building.
Television was demonstrated at the New York World's Fair and the San Francisco Golden Gate International Exposition. RCA's David Sarnoff used his company's exhibit at the 1939 World's Fair as a showcase for the 1st Presidential speech (Roosevelt) on television and to introduce RCA's new line of television receivers, some of which had to be coupled with a radio if you wanted to hear sound. -
#23
1940 Peter Goldmark invents a 343 lines of resolution color television system.
1941 The FCC releases the NTSC standard for black and white TV.
1943 Vladimir Zworkin developed a better camera tube called the Orthicon. The Orthicon (see photo right) had enough light sensitivity to record outdoor events at night. -
#24
Peter Goldmark, working for CBS, demonstrated his color television system to the FCC. His system produced color pictures by having a red-blue-green wheel spin in front of a cathode ray tube.
This mechanical means of producing a color picture was used in 1949 to broadcast medical procedures from Pennsylvania and Atlantic City hospitals. In Atlantic City, viewers could come to the convention center to see broadcasts of operations. -
#25
The FCC approves the first color television standard which is replaced by a second in 1953.
Vladimir Zworkin developed a better camera tube called the Vidicon. -
#26
Ampex introduces the first practical videotape system of broadcast quality.
1956 Robert Adler invents the first practical remote control called the Zenith Space Commander. It was proceeded by wired remotes and units that failed in sunlight.
1960 The first split screen broadcast occurs on the Kennedy - Nixon debates.
1962 The All Channel Receiver Act requires that UHF tuners (channels 14 to 83) be included in all sets. -
#27
1962 AT&T launches Telstar, the first satellite to carry TV broadcasts - broadcasts are now internationally relayed.
1967 Most TV broadcasts are in color.
1969 July 20, first TV transmission from the moon and 600 million people watch.
1972 Half the TVs in homes are color sets.
1973 Giant screen projection TV is first marketed.
1976 Sony introduces betamax, the first home video cassette recorder.
1978 -
#28
1978 PBS becomes the first station to switch to all satellite delivery of programs.
1981 1,125 Lines of Resolution NHK demonstrates HDTV with 1,125 lines of resolution.
1982 Dolby surround sound for home sets is introduced.
1983 Direct Broadcast Satellite begins service in Indianapolis, In.
1984 Stereo TV broadcasts approved.
1986 Super VHS introduced.
1993 Closed captioning required on all sets.
1996 The FCC approves ATSC's HDTV standard.
A billion TV sets world-wide.