group of original and intact fully functional salvaged chicago ball joint incandescent light bulb socket extensions designed, patented and fabricated by the bryant electric company, chicago, ills. the all original bryant socket extensions are comprised of black bakelite, nickel-plated brass, and white glazed ceramic components. the large lot of extensions contain pivoting ball joints with set screw to adjust the angle of the socket. the ceramic rings are free from breaks. the sockets were salvaged from an old movie house built in the 1920's. priced for the lot.