. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . No. 219,628. T. A. Patented Sept. 16, United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW IN ELECTRIC LIGHTS. Specification forming part of Letters Patent No. 219,628, dated September 16, 1879; application filed December 9, 1878. To all whom it may concern: Be it known that I, Thomas Alva Edison,of Menlo Park, in the county of Middlesex andState of New Jersey, have invented an Im-provement in Electric Lights, and the follow-ing is declared to be a descri
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . No. 219,628. T. A. Patented Sept. 16, United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW IN ELECTRIC LIGHTS. Specification forming part of Letters Patent No. 219,628, dated September 16, 1879; application filed December 9, 1878. To all whom it may concern: Be it known that I, Thomas Alva Edison,of Menlo Park, in the county of Middlesex andState of New Jersey, have invented an Im-provement in Electric Lights, and the follow-ing is declared to be a description of thesame. The object of this invention is to produce acandle or light-giving body by the incandes-cence of a conductor of electricity in the formof a cylinder, prism, or other mass of a sizeadapted to yield the required volume of light. The invention consists in an electric-light-giving body formed of a conductor, such asfinely-divided platinum, iridium, rutbinium, orother metal difficult of fusion, incorporatedwith non-conducting material. The candle, made as aforesaid, can be ofany desired size or shape, and the metallicparticles
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