. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . es set forth. 3. A series of polarized relays worked inone main circuit and controlling local circuitsthat operate either type - wheel, magnets orprinting-magnets, substantially as set fortb. 4. A polarized relay having its tongue orswitch centered between the poles of an elec-tro-magnet and between the circuit - closerswhen in a normal condition, substantially asset forth. 5. A type-wheel having letters, figures, andfractional signs arranged in groups for numer-ators and for denominators on opposite sidesof a fract
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . es set forth. 3. A series of polarized relays worked inone main circuit and controlling local circuitsthat operate either type - wheel, magnets orprinting-magnets, substantially as set fortb. 4. A polarized relay having its tongue orswitch centered between the poles of an elec-tro-magnet and between the circuit - closerswhen in a normal condition, substantially asset forth. 5. A type-wheel having letters, figures, andfractional signs arranged in groups for numer-ators and for denominators on opposite sidesof a fractional sign, substantially as set forth,to print letters, figures, and fractions, as speci-fied. 6. A type-wheel with figures arranged oneach side of a hyphen or fractional sign, asand for the purposes set forth. 7. The type-wheel motor composed of a vi-brating arm and pawls, 12 and 13, combinedwith a wedge-acting tooth in the manner andfor the purposes set forth. Signed by me this 17th day ot November,A. D. 1870. THOMAS A. EDISON. Witnesses: Chas. H. Smith,Geo. T.
Size: 1251px × 1998px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
