Inside Out Library

Collection of United States patents granted to Thomas A. Edison, 1869-1884 (1869)

Edison, Thomas A. (Thomas Alva), 1847-1931, Peters, N. (Norris), lithographer, Hammer, William Joseph, 1858-1934, former owner. DSI, Edison, Thomas A. (Thomas Alva), 1847-1931, inscriber. DSI, United States. Patent Office · Washington, D.C. : U.S. Patent Office · leaf 35

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 35
per-ative, substantially as set forth. 4. Two or more printing-telegraph instru-ments placed in one main circuit, and operateelsimultaneously by pulsations of electricity, thetype-wheel being set by pulsations of one po-larity, and the printing being effected by pul-sations of the opposite… … N. PETERS. Photo-LHhographer, WmWngton, D. C. United States Patent Office. THOMAS A. EDISON, OF NEW YORK, N Y.AUTOMATIC ELECTRICAL SWITCH FOR TELEGRAPH APPARATUS. Specification forming part of Letters Patent No. 9€,6§1, dated November 9, 1SG9. To all whom it may concern: Be it knoAvii that I,…

Trade catalogs · Patents · Edison, Thomas A. (Thomas Alva), 1847-1931 · Inventions · Telegraph · Electric machinery · Electric apparatus and appliances · Phonograph · Telephone · Motors

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