. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . -tube, 50A, of a Sprengel pump. The mercury ou itscourse from the reservoir to the drop-tube isforced to pass through the filter. What I claim is— 1. The mercury-filter consisting of a tube or 55vessel with a contracted or capillary exit andcontaining broken or crushed glass, substan-tially as set forth. 2. The combination, with mercurial vacuumapparatus, of a filter for cleaning the mercury, 60located between the elevated mercury-reser-voir and the point of exhaustion, substantially as set forth. 3. The combination
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . -tube, 50A, of a Sprengel pump. The mercury ou itscourse from the reservoir to the drop-tube isforced to pass through the filter. What I claim is— 1. The mercury-filter consisting of a tube or 55vessel with a contracted or capillary exit andcontaining broken or crushed glass, substan-tially as set forth. 2. The combination, with mercurial vacuumapparatus, of a filter for cleaning the mercury, 60located between the elevated mercury-reser-voir and the point of exhaustion, substantially as set forth. 3. The combination, with a Spreugel or droppump, of a filtering-tube containing brokeuor 65crushed glass and having a contracted exit,said filtering-tube being located between theelevated mercury-reservoir and the drop-tube of the pump, substantially as set forth. This specification signed and witnessed this 7025th day of November, 1881. T. A. EDISON. Witnesses: Riohd. N. Dyer, Wm, H. Meadowcroft. (No Model.) T. A. EDISON. ELECTRIC DISTRIBUTION SYSTEM. Eo.#66,793. n Patented Oct. 31, N. PETERS, Photo-Lithographer, Washington, D. C. United States Patent Office THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR TO THEEDISON ELECTRIC LIGHT COMPANY, OF NEW YORK, N. Y. ELECTRIC DISTRIBUTION SYSTEM. SPECIFICATION forming part of Letters Patent No. 266,793, dated October 31, 1882. Application filed December 9, 1881. (No model.) To all ivJiom it may concern: Be it known that I, Thomas A. Edison, ofMeulo Park, in the county of Middlesex andState of New Jersey, have invented a new and5 useful Improvement in Electrical DistributionSystems, (Case No. 361;.) and I do hereby de-clare that the following is a full and exact de-scription of the same, reference being bad to theaccompanying drawings, and to the letters ofio reference marked thereon. lu a system of electric lighting in which atown or village or a portion thereof is sup-plied from one central station it may some-times occur that the dist
Size: 1285px × 1946px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
