. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . Iaim is— 1. The method of manufacturing incandes-cent electric lamps, substantially as set forth,consisting in forming the inclosing bulb or 451globe directly from molten or pot glass, form-ing separately the supporting tube or neck forthe. incandescent conductor, sealing thereinthe leading-in wires, attaching the carbonthereto, and then hermetically uniting the parts 50,by a welding together prior to the exhaustion of the lamp, substantially as set forth. 2. A leading-in wire composed of a centralplatinum section f
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . Iaim is— 1. The method of manufacturing incandes-cent electric lamps, substantially as set forth,consisting in forming the inclosing bulb or 451globe directly from molten or pot glass, form-ing separately the supporting tube or neck forthe. incandescent conductor, sealing thereinthe leading-in wires, attaching the carbonthereto, and then hermetically uniting the parts 50,by a welding together prior to the exhaustion of the lamp, substantially as set forth. 2. A leading-in wire composed of a centralplatinum section for sealing into the glass anouter section and an inner section, having a 55;clamping device formed integral therewith,substantially as set forth. This specification signed and witnessed this21st day of Apr il, 1881. THOS. A. EDISON. Witnesses: Wm. H. Alden, Jr., II. W. Seelt. (No Model.) No. 266,588. T. A. EDISON. VACUUM APPARATUS. Patented Oct. 24, 1882, WITNESSES:. EfJ. I Xir INVENTOR; ATTORNEYS. N. PETERS. Photo-Lithographer, Washington, D. G. United States Patent Office THOMAS A. EDISON, OF MENLO PAEK, NEW JERSEY, ASSIGNOR TO THEEDISON ELECTRIC LIGHT COMPANY, OF NEW YORK, N. Y. VACUUM APPARATUS. SPECIFICATION forming part of Letters Patent No. 266,588, dated October 24, 1882. Application filed December 6,1881. CSo model.) 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 a new and5 useful Improvement in Vacuum Apparatus,(Case 364;) and I do hereby declare that thefollowing is a full and exact description of thesame, reference being had to the accompanyingdrawings, and to the letters of reference marked io thereon. In the continued use of mercury in vacuumapparatus it is liable to become more or lessfoul and dirty, while it is essential for the mostperfect and rapid operation of such apparatus 15 that the mercury should be clean and object,
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