Search results
Results from the WOW.Com Content Network
The Strowger switch has three banks of contacts. Toward the upper end of each shaft are two ratchets. The upper one has ten grooves, and raises the shaft. The lower one has long vertical teeth (on the other side, hidden). The Strowger switch uses two telegraph-type keys on a telephone set for dialing. Each key requires a separate wire to the ...
Almon Brown Strowger (/ ˈ s t r oʊ dʒ ər /; February 11, 1839 – May 26, 1902) was an American inventor who gave his name to the Strowger switch, an electromechanical telephone exchange technology that his invention and patent inspired.
Almon Brown Strowger was the first to file a patent for a rotary dial on December 21, 1891, which was awarded on November 29, 1892, as U.S. patent 486,909. [ 4 ] [ 5 ] The early rotary dials used lugs on a finger plate instead of holes, and did not produce a linear sequence of pulses, but interrupted two independent circuits for control of ...
Telephones were manufactured at that facility from 1935 to 1953, when Automatic Electric sold the cable plant and built a 33-acre, $1.5 million telephone factory at 100 Strowger Boulevard. [5] The Strowger Boulevard factory was sold to BC Tel (as Microtel) in 1979, then was owned by Nortel (as Brock Telecom) from 1990 to 1999; it closed in 2002 ...
The British telephone system was operated at that time by a Government department, the General Post Office (GPO or BPO), which installed several makes of automatic exchanges in the 1910s, including ATE SXS exchanges at Epsom (1912), followed soon after by the Official Switch (for internal GPO use), [3] and another at Leeds (1919). The SXS ...
Strowger may refer to: Strowger switch , automatic telephone exchange equipment Strowger Automatic Telephone Exchange Company , the company that manufactured Strowger switches
Slightly more complicated was the two axis stepping switch, (also called Strowger switch or two motion selector in Britain). Typically, a single compact group of wipers could connect to one of 100 (or 200) different fixed contacts, in ten levels. When the switch was idle, the wipers were disengaged from the fixed contacts.
It can step on one axis (called a uniselector), or on two axes (a Strowger switch). As the first automated telephone switch using electromagnets and hat pins, stepping switches were invented by Almon Brown Strowger in 1888. Strowger filed his patent application on March 12, 1889, and it was issued on March 10, 1891. [273] 1888 Revolving door