. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . United States Patent Office. THOMAS A. EDISON, OF NEWABK, NEW JEESEY, ASSIGNOR TO HIMSELFAND GEOBGE HABEINGTON, OF WASHINGTON, D. 0. IMPROVEMENT IN RECEIVING-INSTRUMENTS FOR CHEMICAL TELEGRAPHS- Specification forming part of Letters Patent No. 150, §47, dated May 12,1874; application filed July 29,1873. To all whom it may concern: Be it known that I, Thomas A. Edison, ofNewark, in tlie county of Essex and State ofNew Jersey, have invented an Improvementin Eeceiving-Instruments for Automatic Tele-graphing, of which t
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . United States Patent Office. THOMAS A. EDISON, OF NEWABK, NEW JEESEY, ASSIGNOR TO HIMSELFAND GEOBGE HABEINGTON, OF WASHINGTON, D. 0. IMPROVEMENT IN RECEIVING-INSTRUMENTS FOR CHEMICAL TELEGRAPHS- Specification forming part of Letters Patent No. 150, §47, dated May 12,1874; application filed July 29,1873. To all whom it may concern: Be it known that I, Thomas A. Edison, ofNewark, in tlie county of Essex and State ofNew Jersey, have invented an Improvementin Eeceiving-Instruments for Automatic Tele-graphing, of which the following is a specifi-cation : In automatic telegraphing, where perforatedpaper is employed for transmitting, and themessage is received upon chemical paper, themarks made upon said chemical paper are of-ten more or less blurred or tailed togetherwhen the speed of transmission is very rapid 5and this is caused by the static charge or sur-plus electricity on the line acting upon the paper after the circuit is broken by the transmit-ter. My present invention is made to l
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