. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ll-ers m and n. These rollers m and n are re-volved constantly, while the machine is in ac-tion, by any suitable mechanism, and the rollern should have an elastic covering, and thepaper pass in between said roller n and thechain or cord ~k. As the rollers m n revolveand draw the paper along, the chain ~k willemboss or indent the paper in a straight line;but when the magnet a attracts the armaturethe chain will be drawn off and produce a zig-zag line, as shown in Fig. 3, the long undula-tions representing dashes and
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ll-ers m and n. These rollers m and n are re-volved constantly, while the machine is in ac-tion, by any suitable mechanism, and the rollern should have an elastic covering, and thepaper pass in between said roller n and thechain or cord ~k. As the rollers m n revolveand draw the paper along, the chain ~k willemboss or indent the paper in a straight line;but when the magnet a attracts the armaturethe chain will be drawn off and produce a zig-zag line, as shown in Fig. 3, the long undula-tions representing dashes and the short onesdots, as indicated by the corresponding line oftelegraphic characters. I claim as my invention— A chain or cord under control of an electro-magnet, and pressed into contact with the sur-face of the paper to produce a telegraphiccharacter by embossing, substantially as setforth. Signed by me this 26th day of April, A. T. A. EDISON. Witnesses: Geo. T. Pinckney,Chas. H. Smith. T. A. in Electro-Magnets. 130,795. Patented Aug. 27, ATTY. AM. PHOTO-LITHOGRAPHIC CO. foSBORHES United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW IN ELECTRO-MAGNETS. Specification forming part of Letters Patent No. 130,795, dated August 27, 1872. To all wlwm it may concern: Be it known that I, Thomas A. Edison, ofNewark, in the county of Essex and State ofNew Jersey, have invented an Improvementin Electro-Magnets; and the following is de-clared to be a correct description of the same. If two magnets of equal power act in oppo-site directions and at the same distance froma swinging armature, said armature will not bemoved; but by removing one magnet furtherfrom the armature the other will be free to ex-ert on that armature a force equal to the dif-ference between the effective force of one mag-net and the other. I avail of the foregoingfeatures, and, instead of employing an adjust-able spring to draw the armature b
Size: 1284px × 1945px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
