. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ng thecurrent through the cell,substan-tially as set forth. 95 3. The method of forming an electroplatedjoint between the wires and carbon in an in-candescing electric lamp, consisting in firstdepositing metal upon the ends of the carbonand the entire length of the wires above the 100glass, then removing a portion of the liquidfrom the electro-depositing cell, and then re- 271,613 versing the current through the cell, substan-tially as set forth. 4. The combination of an electro-depositingcell, a copper plate, and t
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ng thecurrent through the cell,substan-tially as set forth. 95 3. The method of forming an electroplatedjoint between the wires and carbon in an in-candescing electric lamp, consisting in firstdepositing metal upon the ends of the carbonand the entire length of the wires above the 100glass, then removing a portion of the liquidfrom the electro-depositing cell, and then re- 271,613 versing the current through the cell, substan-tially as set forth. 4. The combination of an electro-depositingcell, a copper plate, and the carbon and lead-5 ing-in wires of an incandescing lamp, formingthe electrodes of the cell, means for changingthe level of the liquid in the cell relative tosuch wires and carbon, and means for chang- ing the direction of the current through thecell, substantially as set forth. This specification signed and witnessed this25th day of August, 1882. THOS. A. EDISON. Witnesses: H. W. Seely,Edward H. Pyatt. (No Model.) No. 271,614. T. A. EDISON. SHAFTING. Patented Feb. 6, United States Patent Office, THOMAS A. EDISON, OF MENLO PAEK, NEW SPECIFICATION forming part of Letters Patent No. 271,614, dated February 6, 1863. Application filed October 20,1882. (Ko model.) To all whom it may concern: Be it known that I, Thomas A. Edison, ofMenlo Park, in the comity of .Middlesex audState of New Jersey, have invented a new and5 useful Improvement in Shafting, (Oase ,) of which the following is a specification. The object I have in view is to produceshafting in which the torsional elasticity willbe reduced to the minimum or destroyed alto- io gether. This I accomplish by constructing aJshaft in two parts, one being placed within theother. These parts are proportioned to havethe desired strength, and relatively to havethe same or nearly the same torsional elasticity. 15 After being placed one within the other thetwo parts of the shaft are twisted in oppositedirecti
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