The records document the development of the first commercial atomic clocks by the National Company, Inc., (NATCO) of Malden, Massachusetts, a company known for producing specialized electronic equipment. The records include blueprints, technical drawings and schematics, technical and research reports, instruction manuals, photographs, and marketing materials.
Scope and Contents:
The National Company (NATCO) Atomic Clocks Records, 1955-1968, documents the development of the first commercial atomic clocks. Materials were generated by the National Company, Inc. (NATCO) of Malden, Massachusetts which produced the clocks under contract for military branches of the U.S. government and also marketed them on a retail basis. The collection consists of blueprints, technical drawings and schematics, technical and research reports, instruction manuals, photographs, marketing materials, and a stock offering prospectus for NATCO. If one blueprint, drawing or parts list had two or more models listed, it is included under the first model cited.
Series 1, National Company, Inc., (NATCO), 1957-1959, consists of a stock offering prospectus, 1959, which describes the organization of NATCO, its executives and Board of Directors, financial condition, and products. Located in this series is a bound volume of photographs which accompanied NATCO's contract bids. This volume contains photographs of a state-of-the-art machine shop and electronics laboratory of the late 1950s and early 1960s. A blueprint for a radio receiver— the product on which NATCO had built its reputation—is here.
Series 2, Atomichrons, 1955-1968, contains blueprints, original technical drawings and schematics, instruction manuals for setup and operation, technical and research reports, photographs and marketing materials arranged by Atomichron model from the National Atomic Frequency System (NAFS) prototype through the NC3701 and NC3702. The NC1001, the first commercial atomic clock, is fully documented. Technical Memoranda and proposals (TM-) related to particular models have been included with them. Other Technical Memoranda and proposals are in Series 3, Components, 1955-1957, and Series 5, Technical Memoranda and Reports, 1956-1957.
Series 3, Components, 1955-1967, contains materials related to the development of NATCo's Cesium Beam Tube and other parts of the Atomichrons. It includes Technical Memoranda (TM-), blueprints and original drawings, original notes and computations, parts lists, and photographs. Also included in this series is material related to the Production Engineering Measure (PEM), 1962-1967. This was a piece of equipment designed and built by NATCO to measure the accuracy of each Cesium Beam Tube as it was produced.
Series 4, Collision Avoidance System, 1962-1967, consists of material related to James J. Bagnall's patented Collision Avoidance System, using the Cesium Beam Frequency Standard. It includes his research report, the patent assigned to NATCO, and proposals and reports from NATCO representatives to Air Transportation Association conferences and meetings for 1967.
Series 5, Technical Memoranda and Reports, 1956-1967, consists of bound and numbered (TM-) technical memoranda. These are research reports and proposals for future research or products. Other technical memoranda are in Series 2, Atomichrons and Series 3, Components, 1955-1967.
Series 6, Reprints from Massachusetts Institute of Technology (MIT), 1953-1955, contains a bound volume of reprinted or photocopied papers which document research developments in Cesium Beam Frequency Standards at the time NATCO was establishing itself as a commercial producer.
Arrangement:
The collection is arranged into six series.
Series 1: National Company, Inc., (NATCO), 1957-1959
Series 2: Atomichrons, 1955-1968
Subseries 2.1, National Atomic Frequency System (NAF), 1956
Subseries 2.2, NC1001, 1955-circa 1959
Subseries 2.3, NC1001, Polaris, 1956-1958
Subseries 2.4, NC2001, Militarized, 1956-1961
Subseries 2.5, NC3001, Airborne, 1956-1961
Subseries 2.6, NC1200, 1959
Subseries 2.7, Missileborne Atomichron, 1959-1960
Subseries 2,8, NC1501, 1958-1964
Subseries 2.9, NC1601, Economy, 1958-1964
Subseries 2.10, Tactical Frequency Standard Drawings, 1959
Subseries 2.11, Tri-Service CBFS, circa 1965
Subseries 2.12, NC3501, circa 1965, 1967
Subseries 2.13, NC3601, Aerospace, circa 1965
Subseries 2.14, NC3701, Commercial, 1964-1968
Series 3: Components, 1955-1967
Series 4: Collision Avoidance System, 1962-1967
Series 5: Technical Memoranda and Reports, 1956-1967
Series 6: Reprints from MIT, 1953-1955
Biographical / Historical:
An atomic clock is a cesium-based frequency standard. It operates by exposing cesium atoms to microwaves at one end of their resonant frequencies and then counting their corresponding cycles as a measure of time. In 1955, Louis Essen of Britain's National Physical Laboratory and William Markowitz of the U.S. Naval Observatory collaborated to produce the first measurement of what is now called the atomic second. In 1967, the 13th general Conference of Weights and Measures formally redefined the atomic second as 9,192,631,770. The atomic second became the internationally accepted unit of time. Atomic clocks are the most accurate of all clocks.
The first clock in 1949 was based on the microwave resonances of the ammonia molecule. It was patented by Harold Lyons and Benjamin F. Husten. The first commercial atomic clocks were developed at the Massachusetts Institute of Technology (MIT) Research Laboratory of Electronics under J.R. Zacharias, a protégé of I.I. Rabi's, circa 1955-1956 and were manufactured by the National Company, Inc. (NATCO) of Malden, Massachussets. NATCO, founded in 1914, was a well-respected company known for producing specialized electronic equipment in short runs. Prototype clocks bore the working name National Atomic Frequency Standard (NAFS). When the first commercial product was unveiled on October 3, 1956, it bore the trade name "Atomichron" and the model number NC-1001. Between 1956 and 1960, fifty Atomichrons were made and sold to military agencies, government agencies, and universities. Nine other models followed with refinements in size, portability and accuracy. The most radical design departure began with the NC3001 when the beam tube was placed in the horizontal position. Prices ranged from $10,000 to $50,000.
Patents covering NATCO's frequency standards include: 2,960,663, 2,972,115, 2,991,389, 3,258,713, 3,305,290. In 1965, James J. Bagnall was assigned patent 3,167,772 for a Collision Avoidance System to NATCO. It never reached production.
Although supported by research contracts by all three military branches, especially the Army Signal Corps, NATCO failed to achieve a lasting profitability. It was liquidated, and its patents were acquired by Frequency Electronics in 1969.
Sources
1. PEM Drawing C43767, 1967, PEM Drawings (C38037-C43767), 1964-1967, Series 3, Components, 1955-1967, Atomic Clock Collection, Archives Center, Smithsonian Institution National Museum of American History.
2. Forman, Paul. "Atomichron: The Atomic Clock from Concept to Commercial Product," in Proceedings of the IEEE, vol. 73, p. 1181-1204, 1985.
Related Materials:
Materials at the National Museum of American History
Artifacts related to this collection are located in the Division of Work and Industry.
Materials at Other Organizations
Materials related to MIT staff and departments who were involved in NATCO's Atomic Clock projects also can be found in the Historical Collections at the MIT Museum (http://web.mit.edu/museum/) and in the Institute Archives and Special Collections (http://libraries.mit.edu/archives/) of the MIT Libraries in Cambridge, Mass.
Provenance:
Materials in this collection were donated to the Division of Electricity and Modern Physics by Louis C. Lerner in December 1984. The bulk of the blueprints were purchased from Robert Reeves in August, 1991.
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.
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.
Physical Sciences, Division of (NMAH, Smithsonian Institution). Search this
Extent:
36 Cubic feet (98 boxes)
Type:
Collection descriptions
Archival materials
Date:
1911-1972
Summary:
The collection documents the history of instrumentation through catalogs, bulletins, specification sheets, price lists, and other publications of companies that produce instrumentation.
Scope and Contents:
The Instrument Society of America Collection consists primarily of
catalogs, bulletins, specification sheets, price lists, and other publications of companies that produce instrumentation. The collection is arranged into three series: Series 1, Instrument Society of America, 1947-1964; Series 2, Articles and Publications, 1914-1956; and Series 3, Trade Literature, 1911-1969, which comprises by far the larger portion of the collection.
Series 1, Instrument Society of America, 1947-1964, consists of proceedings and symposium documentation for the Society.
Series 2, Articles and Publications, 1914-1956, consists of articles, publications, papers, and reports arranged alphabetically.
Series 3, Trade Literature, 1911-1969 (bulk 1930s-1960s), is organized alphabetically by company. The companies represented are from the United States, England, Germany, Japan, and Holland. This material covers the time period of 1911 to 1969, with the bulk of it being from the 1930s and 1960s. Additionally, there is a set of Honeywell Brown advertising literature, 1952-1957, with associated job costs for printing and distribution. The bound volumes of Honeywell advertisements include samples of ads for scientific instruments and controls in industry publications such asBrick and Clay Record, Foundry, Iron and Steel Engineer, Petroleum Refiner, Product Engineer andTextile World.
Arrangement:
The collection is arranged into three series by type of material.
Series 1, Instrument Society of America, 1947-1964
Series 2, Articles and Publications, 1914-1956
Series 3, Trade Literature, 1911-1969
Biographical / Historical:
The Instrument Society of America (ISA) was founded in 1945 as an educational organization dedicated to advancing the knowledge and practice related to the theory, design, manufacture, and use of instruments and controls in the various sciences and technologies for the benefit of all mankind. Funds to carry on the purpose of the Society are provided primarily by membership dues, conferences and exhibits, journal advertising, educational materials, book publication sales and royalties, and registration fees from Society-sponsored educational short courses, conferences and symposia.[1]
1. 'Instrument Society of America Consolidated Financial statements for the years, ended December 31, 1999, 1998, and 1997, BNet Business Network, http://findarticles.com/p/articles/mi_qa3739/is_200007/ai_n8909806 (accessed August 28, 2008).
Provenance:
Donated to the National Museum of the History of Technology (now known as the National Museum of American History) by the Instrument Society of America Library. Date of acquisition is unknown.
Transferred to the Archives Center from the Division of Mechanisms, now known as the Division of Work and Industry on July 17, 1986.
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.
Rights:
Copyright status unknown. Collection items available for reproduction, but the Archives Center makes no guarantees concerning intellectual property rights. Archives Center cost-recovery and use fees may apply.
