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Vom Hofe Druggists' measure

Maker:
Vom Hofe, William  Search this
Physical Description:
glass (overall material)
Measurements:
overall: 17.4 cm x 10.8 cm; 6 7/8 in x 4 1/4 in
overall: 7 in x 4 7/8 in x 4 1/4 in; 17.78 cm x 12.3825 cm x 10.795 cm
Object Name:
Graduate (Druggists' measure), patent model
Place made:
United States: New York, New York City
Date made:
1872
ID Number:
MG.M-09348
Catalog number:
M-09348
Accession number:
219305
Patent number:
150,113
See more items in:
Medicine and Science: Medicine
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746a8-e0a2-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_729765
Online Media:

ether inhaler, patent model

Measurements:
overall: 9 in x 10 1/8 in x 3 3/4 in; 22.86 cm x 25.7175 cm x 9.525 cm
Object Name:
Inhaler, Ether
ether inhaler
ether inhaler, patent model
Other Terms:
Inhaler, Ether; Medicine
Date made:
ca 1847
Patent date:
1847-12-13
ID Number:
MG.M-04291
Catalog number:
M-04291
Accession number:
89797
Patent number:
5,365
See more items in:
Medicine and Science: Medicine
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746a5-4a7d-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_723557
Online Media:

crutch, patent model

Physical Description:
wood (overall material)
fabric (overall material)
Measurements:
overall: 1 1/4 in x 25 3/8 in x 5 in; 3.175 cm x 64.4525 cm x 12.7 cm
overall: 25 in x 5 in; 63.5 cm x 12.7 cm
Object Name:
Crutch, Patent Model
crutch, patent model
Place Made:
United States: Massachusetts, Wakefield
Date made:
1862
Subject:
Disabilities  Search this
Credit Line:
Gift of The American Congress of Rehabilitation Medicine thru Mr. Creston Herold
ID Number:
MG.309032.06
Accession number:
309032
1974.309032
Catalog number:
1974.309032.06
Patent number:
36,743
See more items in:
Medicine and Science: Medicine
Health & Medicine
Disabilities
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746a0-e1f7-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_211015
Online Media:

Crutch, patent model

Physical Description:
wood (overall material)
metal, brass (overall material)
textile, cotton (overall material)
paper (overall material)
Measurements:
overall: 50 cm x 10.5 cm x 1.5 cm; 19 11/16 in x 4 1/8 in x 19/32 in
Object Name:
crutch
Date made:
ca 1863
ID Number:
MG.309032.03
Accession number:
309032
Catalog number:
309032.03
Patent number:
39854
See more items in:
Medicine and Science: Medicine, Prostheses
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746a0-e331-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_211081
Online Media:

Patent Application

Collection Creator:
Servodyne Corporation  Search this
Collection Donor:
Gunnarson, John  Search this
Collection Collector:
Information, Technology and Society, Division of, NMAH, SI.  Search this
Container:
Box 1, Folder 8
Type:
Archival materials
Date:
1966 January
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Servodyne Corporation Records, 1955-1971, Archives Center, National Museum of American History.
See more items in:
Servodyne Corporation Records
Servodyne Corporation Records / Series 3: Legal Documents
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0839-ref27

Peery Typesetting Records

Collector:
Information, Technology and Society, Division of, NMAH, SI.  Search this
Creator:
Peery, Walter E.  Search this
Extent:
3 Cubic feet (9 boxes)
Type:
Collection descriptions
Archival materials
Correspondence
Patent applications
Design drawings
Date:
1937-1959.
Scope and Contents:
Papers documenting the invention and patenting of the Peery Typesetter.
Arrangement:
1 series.
Biographical / Historical:
Inventor of an experimental photo typesetting machine.
Provenance:
Immediate source of acquisition unknown.
Restrictions:
Unrestricted research access on site by appointment.
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:
Typesetting  Search this
Genre/Form:
Correspondence -- 1930-1960
Patent applications
Design drawings
Citation:
Peery Typesetting Records, 1937-1959, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.0550
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_collection:sova-nmah-ac-0550
Online Media:

Charles Richardson Pratt Papers

Collector:
Mechanical and Civil Engineering, Division of (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 (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
Online Media:

US 1,474,911 (elevator equalizer) patent application and Wright interference

Collection Collector:
Mechanical and Civil Engineering, Division of (NMAH, SI)  Search this
History of Technology, Division of, NMAH, SI  Search this
Work and Industry, Division of, NMAH, SI  Search this
Collection Creator:
Pratt, Charles Richardson, 1860-1935  Search this
Container:
Box 8, Folder 3
Type:
Archival materials
Date:
1920 - 1922
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Charles Richardson Pratt Papers, 1860-1935, Archives Center, National Museum of American History.
See more items in:
Charles Richardson Pratt Papers
Charles Richardson Pratt Papers / Series 5: Inventions
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0958-ref143

Ship steering (patent application and sketches)

Collection Collector:
Mechanical and Civil Engineering, Division of (NMAH, SI)  Search this
History of Technology, Division of, NMAH, SI  Search this
Work and Industry, Division of, NMAH, SI  Search this
Collection Creator:
Pratt, Charles Richardson, 1860-1935  Search this
Container:
Box 9, Folder 10
Type:
Archival materials
Date:
1917
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Charles Richardson Pratt Papers, 1860-1935, Archives Center, National Museum of American History.
See more items in:
Charles Richardson Pratt Papers
Charles Richardson Pratt Papers / Series 5: Inventions
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0958-ref163

Inventions

Collection Collector:
Mechanical and Civil Engineering, Division of (NMAH, SI)  Search this
History of Technology, Division of, NMAH, SI  Search this
Work and Industry, Division of, NMAH, SI  Search this
Collection Creator:
Pratt, Charles Richardson, 1860-1935  Search this
Type:
Archival materials
Date:
1860 - 1927
Scope and Contents:
This series consists of materials related to Pratt's inventions. The materials include correspondence, patents, patent applications, sketches, calculations, blueprints, and some photographs. The materials are arranged chronologically by patent issue date. Researchers should consult Series 3: Correspondence for additional information.

There is substantial documentation about Pratt's cable tension equalizing device which he co-patented with John Heslip on November 30, 1923 (US 1,474,911) and the subsequent patent interference case. The patent, filed on April 6, 1921, was intended, "to provide an improved apparatus whereby the tension on several load carrying cables may be maintained substantially uniform while operating." The invention would be most valuable to elevators whose load needs to be properly distributed.

Edward E. Wright of Detroit patented an equalizer (US 1,465,705) on August 21, 1923, three months before Pratt. Wright suggested to Pratt that he abandon his pursuit of filing a patent and that he was the rightful inventor. According to Pratt's records, namely his sketches, he and Heslip conceived of the idea in Kansas City first, implementing their invention in the Commerce Trust Building. Pratt's November 30, 1920 sketch, made on the back of a menu for the Hotel Baltimore in Kansas City, details his elevator rope equalizer. Wright began an patent interference with the United States Patent and Trademark Office, Edward E. Wright v. Charles R. Pratt (Interference No. 48, 278) on November 16, 1922. An interference proceeding, also known as a priority contest, is a proceeding before patent judges to determine the priority issues of multiple patent applications. On March 16, 1923, Pratt and Wright resolved their patent interference with the following agreement: Wright paid Pratt $500 in cash; Pratt would no longer pursue the patent interference; and Wright would grant Pratt an exclusive license to manufacture, use, and sell all forms of the equalizer except the form shown in Wright's patent
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Charles Richardson Pratt Papers, 1860-1935, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.0958, Series 5
See more items in:
Charles Richardson Pratt Papers
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0958-ref18

Patent Records

Collection Creator:
Cady, Walter Guyton, 1874-1973 (physicist)  Search this
Collection Source:
Electricity and Modern Physics, Division of, NMAH, SI.  Search this
Type:
Archival materials
Date:
1914-1974
Scope and Contents:
The patent records consist of letter patents issued to Cady and copies from the United States, Canada, and the United Kingdom, patent applications, specifications, notes, and invention disclosure statements from the Office of Naval Research. Cady worked with the Office of Naval Research while at the Scott Laboratory, Wesleyan University during the 1940s and 1950s.
Collection Restrictions:
Collection is open for research but is stored off-site and special arrangements must be made to work with it. Contact the Archives Center for information at archivescenter@si.edu or 202-633-3270.
Collection 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.
Collection Citation:
Walter Guyton Cady Papers, 1903-1974, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.0046, Series 8
See more items in:
Walter Guyton Cady Papers
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0046-ref1509

Edison's Record, Volume 2, a bound volume prepared as a court exhibit includes patent applications and drawings)

Collection Source:
Electricity and Modern Physics, Division of, NMAH, SI.  Search this
Collection Creator:
Hammer, William J. (William Joseph), 1858-1934 (electrical engineer)  Search this
Container:
Box 90
Type:
Archival materials
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
William J. Hammer Collection, Archives Center, National Museum of American History
See more items in:
William J. Hammer Collection
William J. Hammer Collection / Series 2: Edisonia / 2.12: Edison's Patents
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0069-ref2385

Case no. 3: James L. Bradford, patent application materials - Reissue abandoned (no copy in file) Patent no. #14532667

Collection Creator:
Clark, George Howard, 1881-1956  Search this
Collection Source:
Electricity and Modern Physics, Division of, NMAH, SI.  Search this
Container:
Box 498, Folder 2
Type:
Archival materials
Date:
1918-1923
Collection Restrictions:
Collection is open for research but a portion of the collection remains unprocessed and is stored off-site and special arrangements must be made to work with it. Contact the Archives Center for information at archivescenter@si.edu or 202-633-3270.

Gloves must be worn when handling unprotected photographs, negatives, and slides.
Collection 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.
Collection Citation:
George H. Clark Radioana Collection, Archives Center, National Museum of American History, Smithsonian Institution
See more items in:
George H. Clark Radioana Collection
George H. Clark Radioana Collection / Series G: Darby & Darby, Attorneys Patent Files
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0055-ref2996

Case no. 108: Cooley, Patent Application papers [Canadian Patent]

Collection Creator:
Clark, George Howard, 1881-1956  Search this
Collection Source:
Electricity and Modern Physics, Division of, NMAH, SI.  Search this
Container:
Box 498, Folder 6
Type:
Archival materials
Date:
1926-1935
Collection Restrictions:
Collection is open for research but a portion of the collection remains unprocessed and is stored off-site and special arrangements must be made to work with it. Contact the Archives Center for information at archivescenter@si.edu or 202-633-3270.

Gloves must be worn when handling unprotected photographs, negatives, and slides.
Collection 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.
Collection Citation:
George H. Clark Radioana Collection, Archives Center, National Museum of American History, Smithsonian Institution
See more items in:
George H. Clark Radioana Collection
George H. Clark Radioana Collection / Series G: Darby & Darby, Attorneys Patent Files
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0055-ref2999

Case no. 5: Lee DeForest, patent application materials and references to related matters. Wireless Telegrams and Telephone Systems. Includes DeForestÿs notes re: his invention (#1,507,017)

Collection Creator:
Clark, George Howard, 1881-1956  Search this
Collection Source:
Electricity and Modern Physics, Division of, NMAH, SI.  Search this
Container:
Box 498, Folder 8
Type:
Archival materials
Date:
1914-1924
Collection Restrictions:
Collection is open for research but a portion of the collection remains unprocessed and is stored off-site and special arrangements must be made to work with it. Contact the Archives Center for information at archivescenter@si.edu or 202-633-3270.

Gloves must be worn when handling unprotected photographs, negatives, and slides.
Collection 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.
Collection Citation:
George H. Clark Radioana Collection, Archives Center, National Museum of American History, Smithsonian Institution
See more items in:
George H. Clark Radioana Collection
George H. Clark Radioana Collection / Series G: Darby & Darby, Attorneys Patent Files
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0055-ref3001

Radio Patents and Patent Practices

Collection Creator:
Clark, George Howard, 1881-1956  Search this
Collection Source:
Electricity and Modern Physics, Division of, NMAH, SI.  Search this
Type:
Archival materials
Date:
1861-1949
Scope and Contents note:
Series 125 contains copies of United States patents relating to radio and related electrical technologies, arranged by patent number [c. 32,471 (1861)- 2,326,836 (1941)]. Also included is a separate section of Fessenden Patents. Several boxes contain information on patent practices: materials include articles; booklets; correspondence 1907-1913; 1918-26;1929-1930; 1949 diagrams; defendants' exhibits; news clippings; pamphlets; patent applications (U.S., British, and German); patent specifications; periodical clippings; and several photographs. There are also materials relating to various patent suits: Langmuir Patent Record and Argument; Canadian General Electric vs. Fada Radio, 1927. Record of suits on wireless patents (1922-1929). Brody Patent Collection (see list in box).
Collection Restrictions:
Collection is open for research but a portion of the collection remains unprocessed and is stored off-site and special arrangements must be made to work with it. Contact the Archives Center for information at archivescenter@si.edu or 202-633-3270.

Gloves must be worn when handling unprotected photographs, negatives, and slides.
Collection 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.
Collection Citation:
George H. Clark Radioana Collection, Archives Center, National Museum of American History, Smithsonian Institution
Identifier:
NMAH.AC.0055, Series 125
See more items in:
George H. Clark Radioana Collection
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0055-ref2062

[Display of patent drawing and object for Lee DeForest's wireless telegraphy, black & white photoprint]

Collector:
Clark, George H.  Search this
Names:
De Forest, Lee, 1873-1961  Search this
Collection Creator:
Clark, George Howard, 1881-1956  Search this
Collection Source:
Electricity and Modern Physics, Division of, NMAH, SI.  Search this
Extent:
1 Item (Silver gelatin on paper., 9.5" x 7.6".)
Container:
Box 405, Folder 3
Type:
Archival materials
Patent applications
Date:
undated
Scope and Contents:
Patent application filed 27 August 1906.
Local Numbers:
AC0055-0000020.tif (AC Scan)
Restrictions:
Unrestricted research use on site by appointment. Photographs must be handled with cotton gloves unless protected by sleeves.
Collection 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:
Telegraph, Wireless  Search this
Genre/Form:
Patent applications
Collection Citation:
George H. Clark Radioana Collection, Archives Center, National Museum of American History, Smithsonian Institution
See more items in:
George H. Clark Radioana Collection
George H. Clark Radioana Collection / Series A: Thomas Coke KnightT RCA Photographs, circa 1902-1950 / 1.1: Wireless / Early Wireless apparatus, tests and stations
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0055-ref3668

Kern Dental Equipment Collection

Creator:
Kern, George Robert, 1894-1962 (cabinet maker, machinist)  Search this
Kern, George Robert, Jr., 1919-1987  Search this
Source:
Medical History, Division of (NMAH, Smithsonian Institution).  Search this
Names:
Densco, Inc.  Search this
Fairfax Manufacturing Company.  Search this
Hazleton Laboratories.  Search this
Kern Laboratory Equipment Company.  Search this
Hazelton, L. W.  Search this
Henninger, R. G.  Search this
Former owner:
Medical History, Division of (NMAH, Smithsonian Institution).  Search this
Extent:
3 Cubic feet (9 boxes)
Type:
Collection descriptions
Archival materials
Correspondence
Drawings
Patents
Blueprints
Advertisements
Date:
1936-1970
Summary:
Blueprints, drawings, patent applications, patents, product photographs, correspondence, bills and receipts, advertising, and published articles related to the Kerns' products. The bulk of the material, 1949-1958, is from George Kern's files. It primarily relates to the development and marketing of the Dentagraph and high speed dental drills before the formation of the Fairfax Manufacturing Company in 1957.
Scope and Contents:
This collection includes blueprints and drawings, patent applications, patents, product photographs, correspondence, bills and receipts, advertising, and published articles related to the Kern's products. The bulk of the material, dating from 1949 to 1958, is from George Kern's files. It primarily relates to the development and marketing of the Dentagraph and high speed dental drills before the formation of the Fairfax Manufacturing Company in 1957. Most of the FMC material document's Kern's role as a stockholder. However, a large portion of the blueprints and drawings were created by his son or other FMC employees. Several of the patents are George Kern, Jr.'s, and there are copies of other people's patents that relate to the Kerns' patents or inventing activities. The collection has been arranged in chronological order within five series.
Arrangement:
The collection is divided into five series.

Series 1: Personal Papers, 1952-1959

Series 2: Product Files, 1945-1968

Series 3: Marketing Records, 1936-1962

Series 4: Client Files, 1949-1958

Series 5: Competitor Files, 1957
Biographical / Historical:
George Robert Kern was born in 1894 and died in 1962. He was an Arlington, Va., area cabinet maker and machinist who went on to invent several pieces of dental equipment that helped revolutionize the field of dentistry in the early 1950s he was joined in these endeavors by his son, George Kern, Jr.

The elder George Kern began working with dental equipment according to his promotional material because of his own experience with poor fitting dentures. As a machinist accustomed to tight tolerances, he knew it must be possible to make dentures fit better. The result of his work was the Dentagraph and his first patent, granted in 1950. In 1948 a company, Kern laboratory, was incorporated to manufacture the Dentagraph and license the "Dentagraph Tech nic." He also sold dental laboratory benches and dental molding materials under the name Kern Laboratory Equipment Company. Kern's Dentagraph was used by the National Standards Laboratory to test denture materials and the laboratory further improved the device. Apparently Kern received the rights to produce and market this improved tool.

In the early 1950s he began working on high speed dental drills. He developed both a water turbine drill and an air turbine drill. The water turbine drill was manufactured by Bowen Company of Maryland under the trademarked name Turbo Jet. In 1957 the company acquired the rights to this tool and its trademark.

Kern and his son improved on the water turbine drill, and in 1957 formed Fairfax Manufacturing Company (FMC) to produce an air turbine drill and the improved water turbine drill. The senior Kern was a participating stockliolder, receiving stock in return for rights to his inventions. George Kern, Jr., L. W. Hazleton (President of Hazleton Laboratories, a biological (research and development company), and R. G. Henninger (General Manager of Hazleton Laboratories) were the company officers. The stockholders included dentists who also tested the companies new products. Densco, Inc., a Colorado dental equipment company, marketed Kern's products from around 1954, and in 1957 the company began to market Fairfax Manufacturing Company's products.

George R. Kern, Jr., was born in 1919. He left public school in the tenth but took courses in industrial electricity and industrial engineering. He worked for worked the National Bureau of Standards for two years building and installing laboratory equipment. In 1951 he began working at Hazelton Laboratories as Superintendent of Maintenance. He patented several pieces of

Dental equipment and specialized parts for dental equipment. He died in 1987.
Related Materials:
The Division of Medicine and Science has several examples of the Kerns' dental equipment, including a Dentagraph and a number of hand pieces.
Provenance:
Collection donated by John Kern, 1992, December 22.
Restrictions:
Collection is open for research.
Rights:
Usage or copyright restrictions in effect. Contact the repository for details.
Occupation:
Cabinetmakers -- 1930-1970  Search this
Inventors -- 1930-1970  Search this
Machinists -- 1930-1970  Search this
Topic:
Dental instruments and apparatus -- 1930-1970  Search this
Dental technology -- 1930-1970  Search this
Dentistry -- 1930-1970  Search this
Dentures -- 1930-1970  Search this
Inventions -- 1920-2000 -- United States  Search this
Genre/Form:
Correspondence -- 20th century
Drawings -- 1930-1970
Patents -- 20th century
Blueprints -- 20th century
Advertisements -- 20th century
Citation:
Kern Dental Equipment Collection, 1936-1970, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.0479
See more items in:
Kern Dental Equipment Collection
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_collection:sova-nmah-ac-0479

Jacob Rabinow Papers

Author:
Rabinow, Jacob, 1910-  Search this
Collector:
Engineering and Industry, Division of, NMAH, SI.  Search this
Engineering and Industry, Division of, NMAH, SI.  Search this
Names:
Census Bureau  Search this
Control Data Corporation  Search this
RABCO  Search this
United States. National Bureau of Standards  Search this
Extent:
5.5 Cubic feet (14 boxes)
Type:
Collection descriptions
Archival materials
Correspondence
Patents
Photographs
Engineering drawings
Date:
1947-1990
Summary:
The collection documents three major areas of Jacob Rabinow's work in improvement of electronic and other devices: phonograph record players, optical character recognition (reading machines) and automatic self regulation of watches and clocks.
Scope and Contents:
This collection comprises material from three major areas of Jacob Rabinow's work in improvement of electronic and other devices: phonograph record players, optical character recognition (reading machines) and automatic self regulation of watches and clocks. Included are technical descriptions, engineering drawings and sketches, numerous patent applications, patents, photographs of devices and voluminous correspondence, often related to patents and financial claims arising from them. The papers are grouped into the three areas of product innovation in approximate chronological order. In addition to many U.S. patents, Rabinow was granted numerous foreign patents, including British, French, German, Canadian and Japanese which are part of the collection. The patents as early as 1910 1917 were collected and assembled by Rabinow in his search of previous inventors' work.
Arrangement:
The papers are arranged into three series.

Series 1, Straight Line Photograph Arm, 1910-1917; 1947-1988

Subseries 1.1, Patents, 1910-1917; 1947-1988

Subseries 1.2, Litigation and Royalties, 1954-1980

Subseries 1.3, Brochures, Publicity, Photo Prints, and Advertisements, 1954-1980

Subseries 1.4, General Correspondence, 1954-1978

Series 2, Reading Machine, 1956-1990

Subseries 2.1, Patents, 1957-1958

Subseries 2.2, Brochures, Publicity, and Photo Prints, 1954-1970

Subseries 2.3, Correspondence, 1956-1960

Subseries 2.4, General Correspondence, 1954-1978

Series 3, Automatic Regulation of Watches and Clocks, 1948-1981

Subseries 3.1, Patents, 1948-1975

Subseries 3.2, Patent Right Litigation and Royalties, 1948-1976

Subseries 3.3, Brochures, Publicity, and Photo prints, 1953-1964

Subseries 3.4, General Correspondence, 1948-1981
Biographical / Historical:
Jacob Rabinow was born Jacob Rabinovich in the Kharkov, Ukraine in 1910 and moved with his family to Siberia in 1917 during the Bolshevik Revolution. In 1919, the Rabinow Family moved to China, where his father died. With his mother and brother, Rabinow then immigrated to the United States in 1921, where his mother established a corset shop in New York City. Rabinow graduated from the City College of New York with a Bachelor's Degree in Engineering (1933) and a Master's Degree in Electrical Engineering (1934). After graduation in 1934, he worked at diverse jobs until he was hired by the National Bureau of Standards (NBS) and now known as National Institute of Standards and Technology or NIST in 1938. At NBS Rabinow calibrated flow meters and then, with the outbreak of World War II, designed proximity fuses for Army bombs and rockets. To calculate the velocity of the falling fuses, he devised an acceleration integrator. He also worked on bombing techniques. Rabinow eventually became Chief of the Electro-Mechanical Ordnance Division at NBS before leaving in 1954 to form his own company, Rabinow Engineering.

At Rabinow Engineering, projects included the development of automatic winding equipment and test equipment for Sprague Electric; design of a letter sorter later built by Burroughs; a digital computer for the U.S. Post Office; and the construction of reading machines for RCA, UNIVAC, and others. When servicing machines began to require too much staff and travel, Rabinow sold his company and became a consultant. In 1964, Rabinow Engineering eventually became part of Control Data Corporation (CDC) where Rabinow was head of the Rabinow Advanced Development Laboratory. In 1968, Rabinow formed RABCO Company to manufacture his straight-line phonographs. RABCO was later acquired by the Harmon-Kardon Corporation. In 1972, Rabinow rejoined NBS where he was Chief Research Engineer. In 1975, he retired, but acted as a consultant.

Rabinow held 230 United States Patents on a wide variety of mechanical, optical and electrical devices. Of note is his magnetic particle clutch (1956) used in tape and disk drives; first automobile clutch to work by magnetic and not electrostatic charge (1956); first phonograph whose cartridge moved along a straight track rather than at the end of a swinging arm (1959); first self-regulating clock (1960); and his best known invention, a Reading Machine (1960). Rabinow was honored for his scientific work with the Naval Ordnance Development Award (1945); the President's Certificate of Merit (1948); the IEEE's Harry Diamond Award (1977); and the Lemelson-MIT Lifetime Achievement Award (1998) Rabinow died September 11, 1999.
Related Materials:
The Division Medicine and Science holds the Rabinow Scanned Comparison Reading Machine (Accession #: 1982.0393.01).
Provenance:
Collection donated by Jacob Rabinow, 1990, Decmeber 17.
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:
Electrical engineering  Search this
Computers  Search this
Electrical engineers  Search this
Genre/Form:
Correspondence -- 1930-1950
Patents
Photographs -- 20th century
Engineering drawings
Citation:
Jacob Rabinow Papers, 1947-1990, Archives Center, National Museum of American History.
Identifier:
NMAH.AC.0403
See more items in:
Jacob Rabinow Papers
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_collection:sova-nmah-ac-0403

Clock regulator German patent applications,

Collection Author:
Rabinow, Jacob, 1910-  Search this
Collection Collector:
Engineering and Industry, Division of, NMAH, SI.  Search this
Container:
Box 11, Folder 10
Type:
Archival materials
Date:
1959 -1964
Collection Restrictions:
Collection is open for research.
Collection 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.
Collection Citation:
Jacob Rabinow Papers, 1947-1990, Archives Center, National Museum of American History.
See more items in:
Jacob Rabinow Papers
Jacob Rabinow Papers / Series 3: Automatic Regulation of Watches and Clocks / 3.1: Patents
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0403-ref106

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