. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . -bination of a carbon or other resistance ar- 5 ranged in proximity to the cell or cells, andan automatic thermo-circuit regulator for mak-ing and breaking the circuit of the resistance,substantially as set forth. 3. In an electrolytic-cell webermeter, the com-io bination of a carbon or other resistance ar-ranged in proximity to the cell or cells, and anautomatic thermo-circuit regulator composedof a spring and contact-lever, for making andbreaking the circuit of the carbon or other re-ts sistauce, substantially as
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . -bination of a carbon or other resistance ar- 5 ranged in proximity to the cell or cells, andan automatic thermo-circuit regulator for mak-ing and breaking the circuit of the resistance,substantially as set forth. 3. In an electrolytic-cell webermeter, the com-io bination of a carbon or other resistance ar-ranged in proximity to the cell or cells, and anautomatic thermo-circuit regulator composedof a spring and contact-lever, for making andbreaking the circuit of the carbon or other re-ts sistauce, substantially as set forth. 4. The combination, with the plates of anelectrolytic cell, of insulating blocks or stripsfor holding them a definite and fixed distanceapart, and removable insulating-clamps forbinding the plates and blocks or strips together, 20substantially as described. This specification signed and witnessed this20th day of May, 1881. THOS. A. EDISON. Witnesses: Eichd. 1ST. W. Seely. (No Model.) T. A. EDISON. ELECTRICAL DROP LIGHT. No. 251,559. Patented Dec. 27, N. PETERS. Photo-Lithographer. Washington, D. C. United States Patent Office. THOMAS A. EDISON, OP MENLO PARK, NEW DROP-LIGHT. SPECIFICATION forming part of Letters Patent No. 251,559, dated December 27,1881. Application filed November 11,1881. (No 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 and 5 useful Improvement in Electrical Drop-Lights;and I do hereby declare that the following isa full and exact description of the same, ref- iMpence being had to the accompanying draw-ings, and to the letters of reference marked 10 thereon. I The object of this invention is to construct achandelier to be used with incandescent elec-tric lamps, so that the lamp may be raised orlowered, and so placed at such a height as may 5 at any time be desired; and, also, that the lampmay either stand
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