File:Bell telephone magazine (1922) (14569544079).jpg

Identifier: belltelephonevol3132mag00amerrich (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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n unusually firmscientific foundation; and they havebeen developed to a status of flexibleutility, reproducibility, and reliabil-ity. They are now made of materialof crystalline perfection and remark-able purity, produced through the in- Apparatus Components for Usewith Transistors A NEW DEVICE or a new inventionstimulates and frequently demandsother new devices and inventions forits proper use. This is particularlytrue of the transistor. Its circuit tech- genious processes of our chemists and ^^j^^^^ j^^ efficiency and low power metallurgists. Their service life inproper use we expect to be very long.They are reproducible in the samesense that vacuum tubes are reproduc-ble and as the art of their manufac-ture matures, they should be inex-pensive. requirements we have already men-tioned. Operating voltages in mostapplications are remarkably low, per-haps ^-ioth the voltage required byordinary vacuum tubes—only a frac-tion of the voltage readily availablein telephone central offices.
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Here in the Western Electric Compatiy Allentown Pla)it a battery of machines is inoperation for cutting single crystals of germanium into very small units to he used in transistors 84 Bell Telephone Magazine SUMMER At these low v^oltages, capacitors recognized at the outset that secrecy will be made and are now under de- would severely hamper both of these velopment which are as much smaller objectives by restricting the free and than ordinary capacitors as the tran- rapid flow of ideas and delaying sistor itself is smaller than a vacuum broad use of the new technology in tube. In telephone communication military applications. A policy was j uses, with low voltages and low cur- adopted to make transistor informa- rents, coils and transformers may be tion easily available to those with a correspondingly miniaturized. A legitimate need for it. This policy whole series of new miniature com- has been implemented both through ponents is now being developed in the our usual practi

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