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James Lithgow Ewin Patents

Creator:
Ewin, James Lithgow (inventor)  Search this
Extent:
1 Cubic foot (1 box)
Type:
Collection descriptions
Archival materials
Articles
Correspondence
Newsletters
Notes
Patents
Press releases
Date:
1873, 1874, 1879.
Scope and Contents note:
This collection includes an English patent paper #2126 for improved vulcanizable water-proof gum, 1873, to Benjamin Joseph Barnard Mills; a U.S. patent paper #151,109 for improvement in the art of manufacturing horseshoes, 1874; and an English patent paper #1194 for improvement in street-lighting apparatus.
Provenance:
Collection donated by James Lithgow Ewin, March 13, 1894.
Restrictions:
Collection is open for research.
Rights:
Collection items available for reproduction, but the Archives Center makes no guarantees concerning copyright restrictions. Other intellectual property rights may apply. Archives Center cost-recovery and use fees may apply when requesting reproductions.
Topic:
Vulcanization  Search this
Street-lighting apparatus  Search this
Rhythm and blues music  Search this
African American music -- 20th century  Search this
African American musicians  Search this
Blues musicians  Search this
Horseshoeing  Search this
Inventions -- 1870-1880  Search this
Inventors -- 1870-1880  Search this
Popular music -- Publishing and writing  Search this
Genre/Form:
Articles -- 1950-2000
Correspondence -- 1970-2000
Newsletters -- 20th century
Notes
Patents -- 1870-1880
Press releases
Citation:
James Lithgow Ewin Patents, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.0051
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_collection:sova-nmah-ac-0051

Alexander Melville Clark Patent

Creator:
Dodge, W.C.  Search this
Clark, Alexander Melville  Search this
Source:
Work and Industry, Division of, NMAH, SI  Search this
Former owner:
Work and Industry, Division of, NMAH, SI  Search this
Extent:
0.15 Cubic feet (1 box)
Type:
Collection descriptions
Archival materials
Date:
1877
Summary:
A British patent issued to Alexander Melville Clark for an improved process for preventing the accumulation of carbon in retorts used for the distillation of carbureted hydrogen. There is a wax seal attached to the end of the patent.
Scope and Contents:
The collection is the British patent issued to Alexander Melville Clark by the English government in 1877 for inventing an improved process for preventing the accumulation of carbon in retorts used for the distillation of carbureted hydrogen.
Arrangement:
1 series.
Biographical / Historical:
Alexander Melville Clark was an inventor, patent agent, and author. Throughout the late nineteenth and early twentieth centuries he applied for patents for improvements for thimbles, umbrellas and sunshades, typewriting machines, candle cases, machines for trimming and finishing boots and shoes, knitting machines, hot wire voltmeters, combination locks, and door fasteners. In 1884, Clark wrote Analytical Summaries of the Patents, Designs, and Trade Marks' Act, 1883, and of the Patent Laws of All Foreign Countries and British Colonies.
Provenance:
Donated by W.C. Dodge in 1891 to the United States National Museum.
Restrictions:
Collection is open for research.
Rights:
Collection items available for reproduction, but the Archives Center makes no guarantees concerning copyright restrictions. Other intellectual property rights may apply. Archives Center cost-recovery and use fees may apply when requesting reproductions.
Topic:
Patents  Search this
Inventions -- 1870-1880  Search this
Inventors -- 1870-1880  Search this
Chemistry  Search this
Hydrogen  Search this
Distillation -- Hydrogen  Search this
Citation:
Alexander Melville Clark Patent, 1877, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.1017
See more items in:
Alexander Melville Clark Patent
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_collection:sova-nmah-ac-1017

Charles Richardson Pratt Papers

Collector:
Mechanical and Civil Engineering, Division of [former name], NMAH, SI.  Search this
History of Technology, Division of, NMAH, SI  Search this
Work and Industry, Division of, NMAH, SI  Search this
History of Technology, Division of, NMAH, SI  Search this
Mechanical and Civil Engineering, Division of [former name], NMAH, SI.  Search this
Work and Industry, Division of, NMAH, SI  Search this
Creator:
Pratt, Charles Richardson, 1860-1935  Search this
Names:
Sprague, Frank J.  Search this
Extent:
6 Cubic feet (13 boxes, 8 oversize folders)
Type:
Collection descriptions
Archival materials
Diaries
Drawings
Trade catalogs
Photographs
Notebooks
Letterpress books
Patents
Place:
Montclair (N.J.)
Date:
1860-1935
bulk 1910-1924
Summary:
The papers document the professional career of mechanical engineer, Charles Richardson Pratt. The papers include correspondence, patents, patent application materials, agreements, photographs, publications, and blueprints for many of Pratt's inventions, especially his work on elevators.
Scope and Contents:
These papers contain personal materials of Charles R. Pratt; letterpress copybooks; engineering notebooks; diaries; material relating to the development of the heavy-duty, high-rise electric elevator; material concerning elevator cable equalizers and safety devices, Morton-Jacobsen and other lathe chucks, lathe drives and the Pratt Driver, the hydraulic transmission of power in trucks, and ship steering gear; and studies reports, drawings, photographs, catalogs, and trade literature concerning mechanical engineering.
Arrangement:
The collection is arranged into eight series.

Series 1: Personal Materials, 1875-1935

Series 2: Diaries, 1894, 1928-1931

Series 3: Correspondence, 1872-1920

Series 4: Notebooks, 1880, 1889, 1900

Series 5: Inventions, 1860-1927

Series 6: Photographs, 1890-1902

Series 7: Publications, 1895-1929

Series 8: Drawings, 1878-1929
Biographical / Historical:
Charles Richardson Pratt (1860-1935), was born in Massachusetts to John C. and Mary Anne Richardson. He graduated from the Hopkins School of Boston and the Massachusetts Institute of Technology in 1879. Pratt worked at Whittier Machine Company of Boston (1882-1890) where he designed and built the first electric elevator in 1888. The elevator was installed in the Tremont House, Boston. Pratt also worked as an agent and later as a consulting engineer for the Otis Elevator Company, the inventors of the hydraulic elevator.

Pratt was best known for his development of the first electrically powered elevator. In 1892, inventor Frank Sprague (1857-1934) founded the Sprague Electric Elevator Company, and with Charles R. Pratt developed the Sprague-Pratt Electric Elevator. They demonstrated that electrically powered elevators were capable of competing with hydraulic elevators. Pratt held several engineering positions and worked for the Marine Engine Company of Newark, New Jersey (1902-1905) developing elevator systems; consulting engineer to the Universal Speed Control Company of New York City (1906-1919); consultant to the American Engineering Company of Philadelphia (1912); mechanical superintendent at the Crocker Wheel Company of Ampere, New Jersey (1919); engineer for the E. Horton and Sons Company of Connecticut (1920-1923); the General Tractors Corporation (1924-1927); and was associated with the Watson Elevator Company of New York City (1928-1930). Pratt patented many of his ideas, earning over thirty-five patents related mostly to elevators,

Pratt was a member of the Masons, the Sons of the American Revolution, the American Society of Mechanical Engineers, the MIT Club of New Jersey, and the Motor Club of London. He married Mary Byron Ladd and they had two children, Gertrude Ladd Pratt and Donald Richardson Pratt.
Provenance:
This collection was purchased from Charles R. Pratt's daughter, Gertrude Pratt Vance, in 1973.
Restrictions:
Collection is open for research.
Rights:
Collection items available for reproduction, but the Archives Center makes no guarantees concerning copyright restrictions. Other intellectual property rights may apply. Archives Center cost-recovery and use fees may apply when requesting reproductions.
Topic:
Mechanical engineering and engineers  Search this
Inventors  Search this
Elevators  Search this
Machine-tools  Search this
Patents -- 1890-1900  Search this
Power transmission  Search this
Genre/Form:
Diaries
Drawings
Trade catalogs
Photographs -- 19th century
Notebooks
Letterpress books
Patents -- 1870-1880
Citation:
Charles Richardson Pratt Papers, 1860-1935, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.0958
See more items in:
Charles Richardson Pratt Papers
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_collection:sova-nmah-ac-0958
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