. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . proper solvent and the filament dipped inthis solution. What I claim is— 1. The processof preparing the incandescing 60conductors of electric lamps, consisting in firstcarbonizing filaments of the desired material,then soaking the same in a solution of car-bonizable material, and then carbonizing thewhole in a vacuum, substantially as set forth. 65 2. The process of manufacturing incandesc-ing electric lamps, consisting in carbonizinga filament of proper material, soaking said fila-ment in a solution of carbouizable
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . proper solvent and the filament dipped inthis solution. What I claim is— 1. The processof preparing the incandescing 60conductors of electric lamps, consisting in firstcarbonizing filaments of the desired material,then soaking the same in a solution of car-bonizable material, and then carbonizing thewhole in a vacuum, substantially as set forth. 65 2. The process of manufacturing incandesc-ing electric lamps, consisting in carbonizinga filament of proper material, soaking said fila-ment in a solution of carbouizable material,placing said filament in the lamp-globe, ex- 70haustiugthe air from said globe, the filamentbeing heated to incandescence during the lat-ter portion of the exhausting process, andfinally hermetically sealing the globe, substan-tially as set forth. 75 This specification signed and witnessed this14th day of October, 1882. THOS. A. EDISON. Witnesses: Seely,Kichd. N. Dyer. (No Model.) T. A. EDISON. INCANDESCING ELECTRIC LAMP. No. 275,613. Patented Apr. 10, WITNESSES: INVENTOR: ATTORNEY United States Patent Office. THOMAS A. EDISON, OF MENLO PAKK, NEW ELECTRIC LAMP. SPECIFICATION forming part of Letters Patent No. 275,613, dated April 10, 1883. Application filed August 7,1382. (~Ko 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 Incandescing ElectricLamps, (Case 397;) and I do hereby declarethat the following is a full and exact descrip-tion of the same, reference being had to theaccompanying drawings, and to the letters of 10 reference marked thereon. In my Patent No. 248,416 is described anincandescing electric lamp having crystals ofnaphthaline or other similar carbon compoundplaced in the globe for continuously supply- 15 ing and repairing the waste of the more de-fective spots of the carbon filament.
Size: 1917px × 1303px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
