. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . 2 Sheets — Sheet 2. T. A. in Apparatus for Perforating Paper for Telegraphic Use. No. 132,456. Patented Oct. 22, 1872. COG Ooooocooooo ooo o c o o. United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELFAND GEORGE HARRINGTON, OF WASHINGTON, D. 0. IMPROVEMENT IN APPARATUS FOR PERFORATING PAPER FOR TELEGRAPHIC USE. Specification forming part of Letters Patent No. 132,456, dated October 22, 1872. To all whom it may concern: Be it known that I, Thomas A. Edison, ofNew
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . 2 Sheets — Sheet 2. T. A. in Apparatus for Perforating Paper for Telegraphic Use. No. 132,456. Patented Oct. 22, 1872. COG Ooooocooooo ooo o c o o. United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELFAND GEORGE HARRINGTON, OF WASHINGTON, D. 0. IMPROVEMENT IN APPARATUS FOR PERFORATING PAPER FOR TELEGRAPHIC USE. Specification forming part of Letters Patent No. 132,456, dated October 22, 1872. To all whom 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 Telegraphic Perforatiug-Machines, and thefollowing is declared to be a correct descrip-tion of the said invention. The strip of paper is perforated by this ma-chine for use in transmitting telegraphic mes-sages. The machine is made with keys thatperforate either a single dot or three openingsto form a dash, one of the three openings be-ing larger than the others so as to produce alonger pulsation. The paper is fed the properdistance each perforation, and word-spaces,pauses, and sentence-spaces are produced bykeys, and these keys are arranged in a smallcomp
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Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
