Search Results
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Memo from Walter Donner to John E. Leonard
- 1957-Mar-14
The memo discusses the conversion of pH meter oxygen electrodes for use in portable oxygen meters.
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7 itemsMemo from T. H. Lotze to L. R. Pugh
- Precision pH control by precision buffer control
- 1952-Feb-25
The memo describes problems Eastman Kodak encountered with buffer solutions and the suggestion that the Model H-2 pH meter might be adapted for Kodak's applications. Lotze appears to be the creator of images as well as…
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3 itemsMemo from Raymond I. Schiff to William Newton
- Model G Product Meeting Recommended Design Changes for Cost Reduction
- 1956-Oct-10
The memo discusses cost reductions to the Model G pH meter and is extensively annotated.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an…
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Memo from George D. Butler to R. Pat Connor
- Difficulties with Blue Tip Electrodes at Eastman Kodak
- 1952-Jul-22
The memo discusses issues affecting the electrodes used with a Model G pH meter, possible actions, and the risk of losing Kodak's business to a competitor such as Leeds & Northrup.
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Memo from Walter Donner to Beckman Instruments staff
- Case Color for 9600 PH Meter
- 1956-Sep-26
In this memo, Walter Donner discussed the color and material to be used for the Zeromatic's case.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who…
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Memo from Raymond I. Schiff to J. E. Leonard
- 1956-Dec-29
Raymond Schiff describes the dangers of Zeromatic users receiving electric shocks.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an…
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Memo from Ed Molloy to Raymond I. Schiff
- 1957-May-29
In one of a series of memos regarding the Zeromatic pH meter, Ed Molloy outlines differences between the 9600 and H-2 models and proposes solutions for grounding the instrument.
Arnold Beckman invented his first pH…
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2 itemsMemo from Raymond I. Schiff to Robert L. Jackson
- 1957-Jun-04
In this memorandum, Raymond Schiff discussed problems with the Zeromatic pH meter.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an…
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6 itemsMemo from John Leonard to Walter Donner
- Evaluation Study of Twenty-five Zeromatic pH Meters
- 1958-Sep-10
The memo discusses a study of Zeromatic pH meters and includes a handwritten table of data.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed…
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Letter from H. M. Steininger to Arnold O. Beckman
- 1948-Oct-07
A chemist with Standard Oil Company's Research Department, Steininger explored the possible creation of an instrument to analyze and record hydrogen sulfide concentrations in oil refineries, a safety measure otherwise…
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8 itemsNarrative of glucose analyzer development
- 1967
The handwritten account, possibly written by James C. Sternberg, is missing early pages.
The Glucose Analyzer was developed by James Sternberg in 1969 and was one of several very successful medical testing and analysis…
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2 itemsUsers of the First Hundred Beckman Quartz Spectrophotometers
- 1977-Aug-19
The photostat document lists the first hundred companies and institutions to use Beckman's quartz spectrophotometers; the original document was undated.
The first Beckman Instruments DU Spectrophotometer was developed…
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2 itemsLetter from T. C. Harvie to Pat Connor
- 1951-Apr-01
The letter provides an outsider perspective on Beckman Instruments' competition for the DR spectrophotometer's market.
- Addressee Connor, R. Pat
- Author Harvie, T. C.
- Subject Ultraviolet spectroscopy, Scientific apparatus and instruments, Spectrophotometer, Beckman Instruments, inc.
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Letter from S. Feier to R. Pat Connor
- 1951-Apr-01
This letter from S. Feier of Buffalo Apparatus Corporation provides an outsider perspective on competition for Beckman Instruments' DR Spectrophotometer market, with specific mention of the Fisher Spectrocord.
- Addressee Connor, R. Pat
- Author Feier, S.
- Subject Ultraviolet spectroscopy, Scientific apparatus and instruments, Spectrophotometer, Beckman Instruments, inc.
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2 itemsLetter from Elden D. Haller to Arnold O. Beckman
- 1954-Mar-09
The memorandum discusses a rival company's spectrophotometer, the Warren Spectracord. (Warren Electronics, Inc. would be acquired by Perkin-Elmer in 1956). The Beckman Instruments DR Spectrophotometer is framed as…
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2 itemsLetter from S. S. Prentiss to Arnold O. Beckman
- 1945-Feb-16
This letter regards the use of oxygen meters on submarines and in hospitals, issues of cost and portability, and the Naval Research Laboratory's interest in detecting other gases.
Developed from a Linus Pauling design…
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2 itemsLetter from Linus Pauling to S. S. Prentiss
- 1944-Jul-27
The letter regards the development of Models K and L oxygen meters, recommendations for which are ready for further testing by the National Defense Research Committee, and a note that some are unsuitable due to…
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Letter from Arnold O. Beckman to J. H. Rushton
- 1945-Feb-14
Arnold Beckman informs J. H. Rushton that the Model G oxygen meter is ready for testing, but the Model F is not. An order has been received from the Linde Company, but not fulfilled, and an experimental instrument was…
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2 itemsLetter from J. H. Rushton to Arnold O. Beckman
- 1945-Feb-03
In this letter, J. H. Rushton of the National Defense Research Committee requests an update on the status of F and G model oxygen meter instruments.
Developed from a Linus Pauling design during WWII, the technology…
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4 itemsThe Vindication of the DR
- or, "Don't Fall For That Speed Stuff"
- 1954-Apr-16
The DR was a double-beam ultraviolet spectrophotometer, designed for accuracy rather than speed. Lee Cahn's skit represents an effort to begin "selling accuracy," as noted in the attached memo from J. D. MacNamara. The…
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2 itemsLetter from Dr. Donald H. Loughridge to Arnold O. Beckman
- 1953-Nov-17
Donald Loughridge, dean of Northwestern University, exchanges friendly news with Arnold Beckman before discussing chemistry professor Robert L. Burwell's complaints about the IR-2T spectrophotometer, its frequent…
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2 itemsLetter from Arnold O. Beckman to Dr. Donald H. Loughridge
- 1953-Dec-03
In response to Donald Loughridge's complaints about the performance of the IR-2T spectrophotometer, Arnold Beckman defers to general sales manager W. H. Steinkamp and expresses confidence that he will bring the…
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2 itemsLetter from Allen S. Hussey to Arnold O. Beckman
- 1954-Apr-30
Allen Hussey, the director of Northwestern University's chemical laboratories, discusses the frequent breakdowns of the IR-2T spectrophotometer, the practical and ethical barriers to selling it to recoup expenses, and…
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Letter from David Silverman to James C. Sternberg
- 1966-Mar-21
This memorandum represents an early discussion of the development of the glucose analyzer, including the potential of an implanted capsule to maintain insulin levels and the Helipot microcircuitry expertise that could…
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3 itemsLetter from W. A. Wildhack to Arnold O. Beckman
- 1950-Apr-27
The letter concerns importation of spectrophotometers into Germany and France, the Economic Cooperation Administration (ECA), and post-war atomic energy restrictions.