. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . T. A. Telegraph Apparatus. 2 Sheets—Sheet 2. Patented March 28, J. PLTERS. Photo-Uhographei United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW IN PRINTING-TELEGRAPH APPARATUS. Specification forming part of Letters Patent No. 113,033, dated March 28, 1871. To all whom ib may concern: Be it known that I, Thomas A. Edison, ofNewark, in the county of Essex and State ofNew Jersey, have invented and made a newand useful Improvement in Telegraph Appa-ratus, and the follo
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . T. A. Telegraph Apparatus. 2 Sheets—Sheet 2. Patented March 28, J. PLTERS. Photo-Uhographei United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW IN PRINTING-TELEGRAPH APPARATUS. Specification forming part of Letters Patent No. 113,033, dated March 28, 1871. To all whom ib may concern: Be it known that I, Thomas A. Edison, ofNewark, in the county of Essex and State ofNew Jersey, have invented and made a newand useful Improvement in Telegraph Appa-ratus, and the following is declared to be acorrect description of the same. The object of this invention is to operate alocal circuit and one of two electro-magnetstherein from a distant station over one wireby means of pulsations of one polarity oper-ating one electro-magnet in the said local cir-cuit, and pulsations of the opposite polarityoperating the other electro-magnet in the saidlocal circuit. Several stations on one line, each having itsown local circuit, can be operated in unison,and I apply to the said magnets means foractuating a type-wheel and a printing-lever atth
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Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
