Search results
Results from the WOW.Com Content Network
11 February 1876: Elisha Gray invents a liquid transmitter for use with a telephone, but he did not make one. 14 February 1876 about 9:30 am: Gray or his lawyer brings Gray's patent caveat for the telephone to the Washington, D.C. Patent Office (a caveat was a notice of intention to file a patent application.
The full-time operators were on duty 56 hours per week, and while they often grumbled about being overworked by a harsh boss, Johnson says they were reasonably compensated at $50 a month. [40] According to Kenneth Lipartito, AT&T had the option of reducing costs by replacing women operators but waited twenty years before actually doing so.
In phones connected to magneto exchanges, the bell, induction coil, battery, and magneto were in a separate bell box called a "ringer box". In phones connected to common battery exchanges, the ringer box was installed under a desk, or other out of the way place, since it did not need a battery or magneto.
This is an accepted version of this page This is the latest accepted revision, reviewed on 21 December 2024. Technical and legal issues surrounding the development of the modern telephone For broader coverage of this topic, see History of the telephone. Replica of Antonio Meucci's telettrofono Reis's telephone The invention of the telephone was the culmination of work done by more than one ...
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
A 1959 Western Electric model 554 wall phone, derived from the model 500 desk phone. It uses the same internal components, dial, and handset as a desk phone. Several telephone models were derived from the basic model 500, using some of the same components. The model 554 was a wall-mounted version.
One spring day, Katherine, 10, and Sheila Lyon, 12, vanished without a trace. With their bodies not found after 50 years, this week, police and the FBI search returned to the land linked with ...
Reis's telephone around 1861, first device called telephone [16] Bell's first telephone transmitter, ca. 1876, reenacted 50 years later Acoustic telephone ad, The Consolidated Telephone Co., Jersey City, New Jersey, 1886 1896 telephone from Sweden Wooden wall telephone with a hand-cranked magneto generator