File:Bell telephone magazine (1922) (14569701199).jpg

Identifier: belltelephone7273mag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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ailable for communication wouldbe virtually limitless. Light-emittingdiodes are used increasingly in cal-culators, medical equipment, com-puters and other electronic equip-ment, and can be expected in suchdevices as watches and telephones. Solid-state diodes as a source ofmicrowaves (radiation of wave-lengths ranging from 30 centi-meters to about three millimeters)appear likely to lead soon to a pro-liferating technology. It can be ex-pected that they will supplant suchexpensive electron-tube sources asthe klystron and, possibly, the mag-netron in communications, navi-gation and industrial electronics.One can foresee that commercialorganizations will use solid-statemicrowave sources on a large scaleto transmit information and controlindustrial processes. The deviceswill certainly find extensive use indirect satellite-to-earth communica-tion. They would make possible agreatly expanded use of automobiletelephones and even radar in auto- Powered, arti-ficial hands; radar inautomobiles...
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mobiles for such purposes as warn-ing of obstacles, providng automaticheadway control and triggering airbags in case of collision. Microwavesystems are coming into service asburglar alarms and could be devel-oped as fire alarms. Water, gas andelectric companies are exploring theidea of reading meters by a systemin which a truck with a microwavetransmitter-receiver will interro-gate a transponder on each house.Microwave systems could be usedto keep track of buses, police carsand other vehicles whose locationneeds to be known. A few years ago, John R. Pierce,who was then executive director ofresearch in communications sci-ences at Bell Telephone Labora-tories (he recently retired, after 35 years service, and is now professorof electrical engineering at the Cal-ifornia Institute of Technology),was asked by The New York Timesto speculate on the future of com-munication and computation—theareas in which transistors and thesolid-state technology that hasflowed from them have had theirmost

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