Perkins Electric Switch Mfg. Co. v. Knowles

BROWN, District Judge.

The bill charges infringement of claims 4 and 6 of letters patent No. 626,927, June 13, 1899, issued to complainant as assignee of Charles G. Perkins, for “Incandescent Lamp Socket.”

“4. In combination in a lamp-socket, a shell, two blocks of insulating material with recesses arranged to form insulated chambers, a plate with a 'binding-screw located in one of the chambers, a plate with a binding-screw located in the other of the chambers, and a switch-block located in one of the chambers and adapted to make contact with the end of the plate in the same chamber,…