. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ntially as set forth. 5. In combination with a rest upon the pa-per, a point operated by the undulations ofthe surface of the paper and a circuit-closerand electric circuit to a distant receiving-in-strument, substantially as set forth. 6. The arms n and m, pivoted to the stock o,and turning upon a vertical pivot, in combi-nation with the plate a, containing a volutegroove, substantially as specified. 7. Li combination with two revolving plates 213,554 rand the indenting or transmitting mechanismconnected thereto, a
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ntially as set forth. 5. In combination with a rest upon the pa-per, a point operated by the undulations ofthe surface of the paper and a circuit-closerand electric circuit to a distant receiving-in-strument, substantially as set forth. 6. The arms n and m, pivoted to the stock o,and turning upon a vertical pivot, in combi-nation with the plate a, containing a volutegroove, substantially as specified. 7. Li combination with two revolving plates 213,554 rand the indenting or transmitting mechanismconnected thereto, a clutch for connectingone plate before disconnecting the other, sub-stantially as and for the purposes set forth. 8. The combination, with an indenting-in-strn men t,electro-magn ot,an d spirally-groovedplate, of a sounder in the same circuit as theindentiiig-magnet, substantially as set forth. Signed by-me this 3d day of February, AD. 1877. EOTSOST. Witnesses: vGeo. T. Pinckney,Chas. H. Smith. T. A. EDISON. Sextuplex-Telegraph. No. 217,781. Patented iuly 22, N. PETERS. Photo-Lithographer. Washington. D. C. United States Patent Office0 THOMAS A. EDISON, OF MENLO PAEK, NEW JEBSEY, ASSIGNOE TOWESTEEN UNION TELEGEAPH COMPANY, OF NEW YORK, N. Y. IMPROVEMENT IN SEXTUPLEX TELEGRAPHS. Specification forming part of Letters Patent No. 217,781, dated July 22, 1879; application filed May 14, 1877. To all whom it may concern: Be it known that I, Thomas A. Edison, ofMenlo Park, in the county of Middlesex andState of New Jersey, have invented an Im-provement in Electric Telegraphs, of whichthe following is a specification. This invention is an improvement upon thetelegraph known as the quadruplex, and Idesignate this invention as the sextuplex tel-egraph. I have discovered that the rise and fall oftension in the line and the reversals of polar-ity can be effected without deranging the ac-tion of one or more reeds or other instrumentvibrating according to a musical tone, and r
Size: 1446px × 1728px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
