. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . i. Photo-Lithographer, Washington. D, C (50.) 3 Sheets-Sheet 3, THOMAS A. for Perforating Paper for Telegraphic Purposes. No 121,601. Patented Dec. 5, 1871. OOGG GOO GOG GO GGO G G :o;. United States Patent Office THOMAS A. EI)ls<»s\ OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELF ANDGEORGE HARRINGTON, OF WASHINGTON, DISTRICT OF COLUMBIA, IMPROVEMENT IN MACHINERY FOR PERFORATING PAPER FOR TELEGRAPHIC PURPOSES, Specification forming; part of Letters Patent No. B*2l,OOI, dated December 5, 1871. To all w
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . i. Photo-Lithographer, Washington. D, C (50.) 3 Sheets-Sheet 3, THOMAS A. for Perforating Paper for Telegraphic Purposes. No 121,601. Patented Dec. 5, 1871. OOGG GOO GOG GO GGO G G :o;. United States Patent Office THOMAS A. EI)ls<»s\ OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELF ANDGEORGE HARRINGTON, OF WASHINGTON, DISTRICT OF COLUMBIA, IMPROVEMENT IN MACHINERY FOR PERFORATING PAPER FOR TELEGRAPHIC PURPOSES, Specification forming; part of Letters Patent No. B*2l,OOI, dated December 5, 1871. To all whom it nirtt/ concern: Be it known that I. Thomas A. Edison, ofNewark, in the county of Essex and State ofNew Jersey, have invented and made an Im-proYement in Perf ora tbig &tachinery f 0r Tele-graphic Purposes; and the following is de-clared to be a correct description thereof. This machinery is for perforating strips ofpaper employed in transmitting telegraphicmessages, the perforations in the paper allow-ing the circuit to be closed, as heretofore wellknown. A range of finger-keys is provided,and also a range of slide-plates operati ng uponpunches. A presser-lever is connected by acam with each finger-key, and contiguousthereto are projections upon such of the sli
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Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
