. Collection de brevets américains délivrés à Thomas A. Edison, 1869-1884 . être envoyés, lorsque le circuit est fermé, par la perforation du papier; lorsque la partie imperméable du papier de thje se trouve sous la brosse ou le stilus b, l'extrémité est suffisamment bougepour toucher, ou presque, le point *, qui est réglable et monté de n'importe quelle manière. Par ce mouvement labatterie 7c est mis en action en fermant le lecircuit entre i et b, et un currens inverse lancé sur la ligne de télégraphe, ce qui préventile l'atténuation de la précédente pulsa-tion, en éliminant le fil, et les mises en garde

• Contributeur: Reading Room 2020 / Alamy Banque D'Images
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. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . be sent, when the circuit is closed, through the perforation of the paper; andwhen the imperforated portion of thje paper isbeneath the brush or stilus b the end is liftedsufficiently to touch, or nearly so, the point *, that is adjustable and mounted in any con-venient manner. By the said movement thebattery 7c is brought into action by closing thecircuit between i and b, and a reverse currentis thrown upon the telegraph-line, thereby pre-venting the attenuation of the previous pulsa-tion, clearing the wire, and causing the markat the receiving-station to be clear and dis-tinct. I claim as my invention— A circuit-closer operated by the movementof the perforated paper in a telegraph trans-mitting-instrument to throw a reverse circuiton the line, substantially as set forth. Sigued by me this 22d day of June, A. D.1870. THOMAS A. ED1SOK Witnesses: Chas. H. Smith, Geo. T. Pinckney. THOMAS A. EDISON.Improvement in Relay Magnets for Telegraph-Instruments. No. 114, 657. Patented May 9, 1871.. M. PHOTO LITHtHSRAPHK CO. HX {GSBO*N£S f/<OC£SSj United States Patent Office, THOMAS A. EDISON, OF NEWAEK, NEW JEESEY, ASSIGNOE TO HIMSELFAND MAESHALL LEFFEETS, OF NEW YOEK CITY. IMPROVEMENT IN RELAY-MAGNETS FOR TELEGRAPH-INSTRUMENTS. Specification forming part of Letters Patent No. 114, 657, dated May 9, 1871. To all whom it may concern: Be it known that I, Thomas A. Edison, ofNewark, in tke county of Essex and State ofNew Jersey, have invented an Improvementin Electro-Magnets; and the following is de-clared to be a correct description thereof. The object of this invention is to produce anelectro-magnet that can be operated with greatrapidity and accuracy, and capable of being-used as a relay or repeater for a chemical tele-graph operated by punched paper and a stilusor brush circuit-closer, or for a time-repeaterin astronomical or other observatories, or fora relay or repeater to a Morse telegraph-inst

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