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The first tube shaft candlestick telephone was the Western Electric #20B Desk Phone patented in 1904. [1] In the 1920s and 1930s, telephone technology shifted to the design of more efficient desktop telephones that featured a handset with receiver and transmitter elements in one unit, making the use of a telephone more convenient.
A push-button telephone is a telephone that has buttons or keys for dialing a telephone number, in contrast to a rotary dial used in earlier telephones.. Western Electric experimented as early as 1941 with methods of using mechanically activated reeds to produce two tones for each of the ten digits and by the late 1940s such technology was field-tested in a No. 5 Crossbar switching system in ...
A 220 Trimline rotary desk phone, showing the innovative rotary dial with moving fingerstop Early Touch Tone Trimline with round buttons and clear plastic backplate and round non-modular handset cord Redesigned touch-tone desk model Trimline, manufactured on January 9, 1985 The Trimline 2225, one of the last phones made at the Indianapolis Works in 1986 Early foreign made Trimline, December ...
An old rotary dial telephone AT&T push button telephone made by Western Electric, model 2500 DMG black, 1980. A telephone, colloquially referred to as a phone, is a telecommunications device that enables two or more users to conduct a conversation when they are too far apart to be easily heard directly.
Other American and foreign telephone manufacturers had already produced this type of telephone, often referred to as French phone. In the Bell System, hand telephones formally replaced the hitherto used deskstand , colloquially called candlestick , by the end of the 1920s, although reconditioned candlestick telephones remained in service for at ...
It was the first commercially marketed telephone to incorporate the dial and handset into a single unit. Because of its styling and its influence on future telephone design, the Ericofon is considered one of the most significant industrial designs of the 20th century by Phaidon. [ 1 ]
When winding the dial-return spring, these clutches disconnected to let the dial turn quickly. When the dial was released, the clutch spring wrapped tightly to drive the governor. While winding the dial, a spring-centered pawl in the Western Electric dial wiggled off-center when driven by the cam on the dial shaft.
The rotary dial version with ringer was known as the 702B, while the modular cord variant was labeled 702BM. The model 711B had a slide switch or push-button and was a two-line phone with exclusion on the first line. The ten-button Touch Tone version was known as the 1702B, and when twelve-button keypad were introduced the phone was labeled as ...