. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ssed out on polished surfaces intosheets of uniform thickness. Filaments of thedesired shape with enlarged ends are punched from the dough and are dried, after which they 25are carbonized by heat under strain and press-ure; or the dough is forced by pressure from achamber through an orifice in the shape of along filament, and is cut into proper pieces of dough are put on the ends of 30the cut filaments to form the enlarged clamp-ing ends, when the filaments are bent intoproper shape and dried, after wh
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ssed out on polished surfaces intosheets of uniform thickness. Filaments of thedesired shape with enlarged ends are punched from the dough and are dried, after which they 25are carbonized by heat under strain and press-ure; or the dough is forced by pressure from achamber through an orifice in the shape of along filament, and is cut into proper pieces of dough are put on the ends of 30the cut filaments to form the enlarged clamp-ing ends, when the filaments are bent intoproper shape and dried, after which they arecarbonized by heat under strain and filaments made in either way described 35may be dried under strain or strain and press-ure to preserve their I claim is— A flexible carbon filament for incandescingelectric lamps, formed of carbonized gluten, 40or a mixture thereof with other materials,substantially as set forth. This specification signed and witnessed this5th day of July, 1882. THOMAS A. EDISON. Witnesses: 0. P. MOTT, Kichd. N. I
Size: 1400px × 1786px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
