|
According to this full-page advertisement
in the June 1955 issue of Radio & Television News magazine, Bell Telephone
Laboratories was responsible for designing and fielding "waveguide pipe," aka flexible
circular waveguides. According to other historical sources, both
George Southworth
of Bell Telephone Laboratories and
Wilmer Barrow of the
Massachusetts Institute of Technology (M.I.T.) independently and simultaneously
developed circular waveguide, but the early devices were rigid pipe rather than
being fabricated from tightly wrapped, insulated wire that permitted it to be bent
rather than requiring separate corner and offset pieces. Insertion loss and VSWR
is typically not as good as with rigid waveguide, but the ease of installation in
many situations justifies the poorer electrical performance. Bell Telephone Laboratories
was responsible for a huge number of breakthrough and paradigm-changing discoveries
prior to being broken into parts (Regional Bell Operating Companies, aka
Baby Bells) in 1984 due to an antitrust lawsuit.
Bell Telephone Laboratories Ad - Pipes of Progress
 Hundreds of thousands of telephone conversations
or hundreds of television programs may one day travel together from city to city
through round waveguides - hollow pipes - pioneered at Bell Telephone Laboratories.
Round waveguides offer tremendous possibilities in the endless search for new
ways to send many voices great distances, simultaneously, and at low cost. Today,
Bell Laboratories developments such as radio relay, coaxial cable and multivoice
wire circuits are ample for America's needs. But tomorrow's demands may well call
for the even greater capacity of round waveguides.
Unlike wires or coaxial, these pipes have the unique property of diminishing
power losses as frequencies rise. This means that higher frequencies can be used.
As the frequency band widens, it makes room for many more voices and television
programs. And the voices will be true, the pictures faithfully transmitted.
These studies illustrate once more how Bell Telephone Laboratories scientists
look ahead. They make sure that America's telephone service will always meet America's
needs, at the lowest possible cost.
New type of waveguide pipe formed of tightly wound insulated wire transmits better
around corners than solid-wall pipes.
New type waveguide is bent on wooden forms for study of effect of curvature on
transmission,. The waveguide itself is here covered with a protective coating.
Testing round waveguides at Bell Telephone Laboratories, Holmdel, New Jersey.
Unlike coaxial cable, waveguides have no central conductor. Theoretically, voice-capacity
is much greater than in coaxial cable.
Bell Telephone Laboratories
Improving America's telephone service provides careers for creative men in scientific
and technical fields.
Posted April 18, 2024
(updated from original post
on 2/12/2017)
| Bell Telephone
Laboratories Infomercials |
|
|
|
|
