video was invented by Ampex Corporation of California, U.S.A.
development of the video system started during the 1940s. But it was finally invented and
patented in 1956.
As technologies improve, so have videotape
recorders. They have become portable and become smaller than before. Also other special
equipment and other special features has been created but the basic structure remains the
Video recorders and players utilizes a
videotape. Videotape is a plastic strip covered with particles of iron oxide. As videotape
travels through the videotape recorder, the recorder forms patterns of magnetization in
the iron oxide. These patterns represent television signals. The recorder uses electricity
and magnetism to form the patterns. It converts the TV signal into electric current, which
travels through wire coils of small electromagnets called heads. A head is a ring of metal
that has a narrow cut called a gap. Opposite the gap, a coil of wire is wrapped around the
ring. This coil conducts the current corresponding to the TV signal. The current produces
a strong magnetic field in the ring.
Without the invention of the videotape recorder, it
would be hard to record events that are special to us. It could be used in the home, in
schools, and especially in television industry. Different special events and also it has
lead to development of other media equipment.