. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . N. PETERS, PHOTO-LITHOGRAPHER. WASHINGTON. D C. United States Patent Office, THOMAS A. EDISON, OF NEWARK, NEW JEESEY, ASSIGNOR TO HIMSELFAND GEORGE HARRINGTON, OF WASHINGTON, D. 0. IMPROVEMENT IN AUTOMATIC ROMAN-CHARACTER TELEGRAPHS. Specification forming part of Letters Patent No. 1*72,305, dated January 18,1876; application filed January 15, 1875. No. 92. To all iclwm 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 Automa
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . N. PETERS, PHOTO-LITHOGRAPHER. WASHINGTON. D C. United States Patent Office, THOMAS A. EDISON, OF NEWARK, NEW JEESEY, ASSIGNOR TO HIMSELFAND GEORGE HARRINGTON, OF WASHINGTON, D. 0. IMPROVEMENT IN AUTOMATIC ROMAN-CHARACTER TELEGRAPHS. Specification forming part of Letters Patent No. 1*72,305, dated January 18,1876; application filed January 15, 1875. No. 92. To all iclwm 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 Automatic Telegraphs, of which the follow-ing is a specification: This improvement is available in transmit-ting block or Roman characters made by per-forations in a strip of paper, such as shown inmy Patent No. 151,209, and receiving thesame upon a strip of chemically-prepared pa-per. I make use of four transraitting-rollers andtwo line-wires, and I arrange the rollers toact iu pairs, one slightly ahead of the other,and I arrange the circuits so as to send posi-tive or negative
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