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 1585

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 1585
volving armature, ofthe field-magnet provided with convergent po-lar extensions made each in one piece magneti-cally and nearly surrounding the armature, 4c,;and with two or more pairs of magnet-cores,having separate magnetic yokes or back pieces:,!substantially as set forth. This specification,… … United States Patent Office. THOMAS A. EDISON, OF MESLO PARK, NEW JERSEY.MAGNETO-ELECTRIC SIGNALING APPARATUS. SPECIFICATION forming part of Letters Patent No. 282,387, dated July 31, 1883. Application filed August 7, 1882. (No model.) COCM CMCOCM 03Q_ CD O o It is hereby certified that in Letters…

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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