Edison Machine Works was set up to produce other components of the electrical illumination system and it was successful.
 To alleviate the problem in 1881 Edison leased the old Etna Iron Works on Goerck Street, Lower Manhattan and set up the Edison Machine Works with Edison providing 90% of the capital and investor partner Charles Batchelor providing 10%
 Francis Jehl, Edison's assistant in the invention of the lamp, supervised the installation

