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The Western Electric 500-type telephone replaced the 300-type, which had been produced since 1936. The model 500 line was designed by the firm of industrial designer Henry Dreyfuss, the product of several years of research and testing in collaboration with Bell Laboratories and Western Electric. Development started in 1946 with early sketches ...
Western Electric Co., Inc. was an American electrical engineering and manufacturing company that operated from 1869 to 1996. A subsidiary of the AT&T Corporation for most of its lifespan, Western Electric was the primary manufacturer, supplier, and purchasing agent for all telephone equipment for the Bell System from 1881 until 1984, when the Bell System was dismantled.
Western Electric 302 telephone with a thermoplastic case. The model 302 telephone is a desk set telephone that was manufactured in the United States by Western Electric from 1937 until 1955, and by Northern Electric in Canada until the late 1950s, until well after the introduction of the 500-type telephone in 1949. The sets were routinely ...
The researchers invented the exponential horn, and, on realizing that it needed to be nine feet long to reproduce the lowest frequencies on the new discs, designed a method for "folding" the horn into a cabinet of practical size. The design was released by Victor as the "Orthophonic" Victrola in the autumn of 1925.
E-plane horn (fig. b) – A sectoral horn flared in the direction of the electric or E-field in the waveguide. H-plane horn (fig. c) – A sectoral horn flared in the direction of the magnetic or H-field in the waveguide. Conical horn (fig. d) – A horn in the shape of a cone, with a circular cross section. They are used with cylindrical ...
Western Electric 202 hand telephone set as refurbished in the late 1930s and 1940s with new handset style. The low-profile 684A subset (1931) is mounted on wall in background. When designating anti-sidetone apparatus, the Bell System practice was to add the value 100 to the apparatus code of the corresponding sidetone equipment. [34]
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Years later, Western Electric redesigned the Trimline to use a low-power green light-emitting diode (LED) to backlight the dial, which was powered by current from the telephone line, eliminating the need for the transformer. Always eager to re-use its older stocks of turned-in rental phones, AT&T later repainted and sold early-model non-LED ...
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