Edison and Swan Electric Light Company Edison and Swan Electric Light Company The Edison and Swan Electric Light Company Limited was a manufacturer of incandescent lamp bulbs and other electrical goods. It was formed in 1883 with the name Edison & Swan United Electric Light Company with the merger of the Swan United Electric Company and the Edison Electric Light Company. Thomas Edison established the Edison Electric Light Company in 1878. Joseph Swan established the Swan United Electric Light Company in 1881. In 1882 the American Edison Company of Thomas Edison sued Swan, claiming infringement of Edison's U.S. patent of 1879; however, they never made it
World's Columbian Exposition their costs at $554,000 but Westinghouse under bid them by 70 cents per lamp to get the contract. Westinghouse could not use the Edison incandescent lamp since the patent belonged to General Electric and they had successfully sued to stop use of all patent infringing designs. Since Edison specified a sealed globe of glass in his design Westinghouse found a way to sidestep the Edison patent by quickly developing a lamp with a ground glass stopper in one end, based on a Sawyer-Man "stopper" lamp patent they already had. The lamps worked well but were short lived, requiring a small