. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . g an evennessin the recorded dots and dashes which it isvery hard to obtain on very long circuits. I use an air-condenser, C, so that it will dis-charge instantly, which is not the case withcondensing-surfaces separated with a non-con-ducting material, the phenomenon of absorp-tion preventing their discharging quickly andreducing the speed. I believe I am the first to discover that anair-condenser applied to a chemical telegraphwill promote rapidity of operation at the re-ceiving-instrument. I claim as my invention—
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . g an evennessin the recorded dots and dashes which it isvery hard to obtain on very long circuits. I use an air-condenser, C, so that it will dis-charge instantly, which is not the case withcondensing-surfaces separated with a non-con-ducting material, the phenomenon of absorp-tion preventing their discharging quickly andreducing the speed. I believe I am the first to discover that anair-condenser applied to a chemical telegraphwill promote rapidity of operation at the re-ceiving-instrument. I claim as my invention— 1. The air-condenser inserted in the line atthe receiving-station of a chemical telegraph,for the purposes set forth. 2. In a chemical telegraph, the method speci-fied of forming dashes by transmitting, bymeans of perforated paper, a strong currentfollowed by a weak current, substantially asset forth. Signed by me this 19th day of January, 1875. THOS. A. EDISON. Witnesses: Geo. T. Pinckney,Chas. H. Smith. T. A. No. 196,747. Patented Nov. 6, N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON, C C, United States Patent Office. THOMAS A. EDISON, OF MENLO PABK, NEW IN STENCI L-PENS. Specification forming part of Letters Patent No. 196,54iy, dated November 6; 1877; application filed April 23, 1877. To all whom it may concern: Be it known that I, Thomas A. Edison, ofMenlo Park, in the comity of Middlesex andState of New Jersey, have invented an Im-provement in Autographic Pens, of which thefollowing is a specification: My present invention relates to a pen actu-ated by electricity, and adapted to perforatingpaper that is to be used in printing in themanner set forth in Letters Patent No. 180,857,granted to me. I reciprocate the perforating - needle withgreat rapidity by means of a reed or bar vi-brating with great rapidity, and acting toopen and close a circuit to an electro-magnet,that serves to maintain the vibration of thesaid reed or b
Size: 1315px × 1899px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
