. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ATTEST! (7. jj INVENTOR, N, PETERS, Photo-Lithographer. Washington. D. C. United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW JEESEY, ASSIGNOR TO THEEDISON ELECTRIC LIGHT COMPANY, OP NEW YORK, N. Y, MOLD FOR CARBONIZING. SPECIFICATION forming part of Letters Patent No. 287,522, dated October SO, filed March 16, 1883. (No mcdel.) • To all whom it may concern: Be it known that I, Thomas A. Edisox, ofMenlo Park, in the county of Middlesex andState of New Jersey, have invented a new and 5
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ATTEST! (7. jj INVENTOR, N, PETERS, Photo-Lithographer. Washington. D. C. United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW JEESEY, ASSIGNOR TO THEEDISON ELECTRIC LIGHT COMPANY, OP NEW YORK, N. Y, MOLD FOR CARBONIZING. SPECIFICATION forming part of Letters Patent No. 287,522, dated October SO, filed March 16, 1883. (No mcdel.) • To all whom it may concern: Be it known that I, Thomas A. Edisox, ofMenlo Park, in the county of Middlesex andState of New Jersey, have invented a new and 5 useful Improvement in Molds for Carbonizing,(Case No. 542,) ofwhiclithe following is a speci-fication. My invention relates to molds for carboniz-ing the filaments which form, after carboni- } zation, the incandescing conductors of electriclamps, my object being to keep the filamentunder strain during carbonization, while atthe same time allowing contraction, the fila-ment being so held and the strain being ap- 5 plied in such manner that the most delicatefilaments will not be fractu
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