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The main producers at this point were General Electric (GECo), Perkins, Paiste and Bryant (who had taken over Westinghouse’s socket production in 1890).
By the end of the decade, however, the use of electric light had grown to such an extent that the electrical companies were motivated to look for ways to reduce the cost of manufacturing sockets and improve their safety features.They are impossible fossils, out-of-time technology, anachronistic artifacts.In other words, if our history of the world is correct, they just should not exist. Unlike ghosts, mysterious creatures like Bigfoot and the Loch Ness Monster, and phenomena like telekinesis, these unexplained artifacts have been seen, touched, and examined.In 1892, General Electric took control of Edison's company and soon abandoned his DC dead end. Tournier, featured an improved switch design housed in a Lange shell.In 1896 they introduced their first Edison screw base socket for AC use. Tournier's switch was ingeniously simple, but it took up more space than the older Lange-type switches, necessitating an increase in the diameter of the upper half of the shell.
All of the major electric companies had come up with their own complete system of components, which included proprietary methods of securing the light bulb in its socket.