Search Results
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Hand holding a Beckman Series 822 voltage regulator
- 1950 – 1969
Voltage regulators maintain a constant voltage level in electrical devices.
- Photographer Armstrong & Hess
- Subject Voltage regulators, Beckman Instruments, Inc.
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Beckman Model 831 microcircuit regulator with tape measure
- 1950 – 1969
This photograph is part of a series of marketing images used to demonstrate the small size of Helipot products, in this case microcircuit regulators.
- Photographer Armstrong & Hess
- Subject Voltage regulators, Tape measures, Beckman Instruments, Inc.
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Helipot Model 822 Voltage Regulator
- 1950 – 1969
Voltage regulators maintain a constant voltage level in electrical devices.
- Photographer Armstrong & Hess
- Subject Microelectronics, Voltage regulators, Beckman Instruments, Inc.
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Beckman Model 826 voltage regulator with marbles
- 1950 – 1969
This photograph is part of a series of marketing images used to demonstrate the small size of Helipot products, in this case voltage regulators.
- Photographer Armstrong & Hess
- Subject Marbles (Game objects), Voltage regulators, Beckman Instruments, Inc.
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Hand holding Helipot Model 826 Voltage Regulator
- 1950 – 1969
Voltage regulators maintain a constant voltage level in electrical devices.
- Photographer Armstrong & Hess
- Subject Microelectronics, Voltage regulators, Beckman Instruments, Inc.
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U.S. Department of Agriculture personnel
- 1950s
General view of U.S. Department of Agriculture personnel at an unidentified facility. Per a notation on the verso of the photograph, the individuals are identified (in no particular order) as follows: K.S. Love;…
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Beckman Model W Industrial pH Meter
- 1950s
The industrial model pH meters had features designed specifically for industrial (as opposed to laboratory) environments, like the Model W's rubber gaskets to prevent corrosive gases or dust from entering the…
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Helipot Series 6180, Model 6187 Precision Potentiometers
- 1950 – 1969
Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…
- Subject Potentiometer, Beckman Instruments, Inc.
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Beckman Thick-film SIP Line LXX
- 1950 – 1969
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8-pin DIP Package
- 1950 – 1969
Dual in-line packages (DIP) are rectangular in shape, with two parallel rows of pins for through-hole mounting to a circuit board.
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Caroline Cooper and staff at nylon plant in Martinsville, Virginia
- 1950s
Group photograph of staff from DuPont's nylon plant in Martinsville, Virginia. Caroline Cooper, the first forewoman promoted to shift supervisor, is visible in the front row, fourth from right. The rest of the…
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Group photograph of staff at nylon plant in Martinsville, Virginia
- 1950s
Group photograph of staff from DuPont's nylon plant in Martinsville, Virginia. Supervisor C.P. White is visible in the front row, far left side. The rest of the individuals depicted in the photograph are unidentified.
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2 items
Porter Chemcraft Chemistry Lab featuring Atomic Energy
- 1950 – 1959
Chemistry sets reached their heyday in the 1950s, but production of them began in the United States during World War I. Playing with a toy chemistry set inspired many a boy to become a chemist, and not until the late…
- Manufacturer Porter Chemical Company
- Subject Chemistry sets, Porter Chemical Company
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Summary of Supplementary Discussion on Integrals Useful for Molecular Quantum Mechanics, 1951
- 1951-Sep-11
Meeting held at the Hotel New Yorker, with R.S. Mulliken, C.A. Coulson, H. Shull, M.A. Barnett, C.C.J. Roothaan and K. Rudenberg in attendance.
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2 items
Letter from Harrison Shull to Robert S. Mulliken, 1951
- 1951-Jul-30
Concerns work being done on molecular integrals and hybrid orbitals, as well as Shull's reply to an invitation to attend the Shelter Island Conference.
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2 items
Letter from Robert S. Mulliken to Harrison Shull, 1950
- 1950-Aug-10
Concerns various methods for computation and a discussion of wave functions.
- Addressee Shull, Harrison
- Author Mulliken, Robert Sanderson
- Subject Shull, Harrison, Yerkes Observatory, Mulliken, Robert Sanderson, Wave functions, Quantum theory
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Apparatus at U.S. Department of Agriculture facility
- 1950s
General view of an unidentified apparatus, possibly a hopper or type of granulation equipment, at an unidentified U.S. Department of Agriculture facility, likely the U.S.D.A.'s Agricultural Engineering Laboratory. Three…
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2 items
Testing of radioactive material at U.S. Department of Agriculture facility
- 1950s – circa
Two views of a chemist inserting radioactive materials into an apparatus at an unidentified U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing,…
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Fertilizer trays at U.S. Department of Agriculture facility
- 1950s – circa
General view of fertilizer trays on a suspension apparatus at an unidentified U.S. Department of Agriculture facility.
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U.S. Department of Agriculture drillability apparatus
- 1950s – circa
General view of a drillability apparatus with fertilizer hoppers, a starwheel, and rotating plate mechanism at an unidentified U.S. Department of Agriculture facility.
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Radioactive material handling at U.S. Department of Agriculture facility
- 1950s – circa
General view of a chemist handling radioactive material at an unidentified U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing, including the…
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George Wieczorek and colleague using Geiger counter at U.S. Department of Agriculture facility
- 1950s – circa
General view of chemist George Wieczorek (left) and an unidentified chemist using a Geiger counter to measure ionizing radiation in radioisotopes at an unidentified U.S. Department of Agriculture facility. A box of…
- Subject Radioisotopes, Nitrogen fertilizer industry, United States. Bureau of Chemistry and Soils, Radioactive substances, Chemists, Radioactive substances--Testing, Geiger-Müller counters, United States. Department of Agriculture, Remote handling (Radioactive substances), Employees, Wieczorek, George
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Geiger counter in use at U.S. Department of Agriculture facility
- 1950s – circa
View of chemist George Wieczorek (right) and an unidentified chemist using a Geiger counter to measure ionizing radiation in an unknown substance at a U.S. Department of Agriculture facility. The U.S.D.A. commonly used…
