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2 items
Letter from Arnold O. Beckman to S. S. Prentiss
- 1945-Sep-20
Arnold Beckman notes that he has been busy after the "termination of the war" and discusses bugs in the Model E and complaints about the ruggedness of the oxygen meter.
Developed from a Linus Pauling design during…
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Letter from Julius Kauffman to S. S. Prentiss
- 1945-Sep-26
This letter to Dr. Spencer S. Prentiss of the National Defense Research Committee describes the results of the clinical trial of the Pauling Oxygen Meter by the United States Army. The Army decided not to standardize…
- Addressee Prentiss, Spencer S.
- Author Kauffman, Julius
- Subject Scientific apparatus and instruments, Oxygen--Measurement, United States. Army. Medical Corps, United States. Office of Scientific Research and Development. National Defense Research Committee, Beckman Instruments, Inc., World War (1939-1945)
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2 items
Letter from Arnold O. Beckman to S. S. Prentiss
- 1945-Nov-12
Arnold Beckman discusses the status of contract reports, an instrument damaged during shipment, and asks about Spencer Prentiss's post-war plans. He expects to consult with Linus Pauling to decide which instrument to…
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2 items
Letter from S. S. Prentiss to Arnold O. Beckman
- 1945-Nov-14
In this handwritten letter, Prentiss discusses reports on the oxygen meter contracts and the possibility of working for Phillips Petroleum, despite his lack of enthusiasm for relocating to Oklahoma.
Developed from a…
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Instructions for replacing Nernst Glower in Beckman IR-1 Spectrophotometer
- 1945-Dec-01
A Nearnst glower is a now-obsolete device that uses a cylindrical rod of heated oxides to deliver infrared radiation in instruments used for spectroscopy.
The Beckman Instruments IR spectrophotometers began as a…
- Creator Of Work Beckman Instruments, Inc.
- Subject Scientific apparatus and instruments, Spectrophotometer, Infrared spectroscopy, Beckman Instruments, Inc.
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The Beckman Model DR Recording Spectrophotometer
- 1945-Dec-05
The DR Spectrophotometer was a basic model DU (an ultraviolet, single beam, quartz-crystal spectrophotometer) with an added recorder. This one-sheet description of the instrument was used in several Beckman Instruments…
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18 items
Beckman Infrared Spectrophotometer Model IR-2
- 1946 – 1955
The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…
- Creator Of Work Beckman Instruments, Inc.
- Subject Scientific apparatus and instruments, Spectrophotometer, Infrared spectroscopy, Beckman Instruments, Inc.
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National Technical Laboratories banquet
- 1946
The head table at a banquet for an unidentified occasion. Mabel and Arnold Beckman are second and third from left, respectively.
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12 items
Operating Instructions, the Beckman Model DU Photoelectric Quartz Spectrophotometer
- Bulletin 91-B
- 1946
The first Beckman Instruments DU Spectrophotometer was developed in 1940, when the company was still called National Technical Laboratories. Spurred by employee Howard Cary (who had previously been involved in pH meter…
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119 items
Preliminary Instructions, Beckman Infrared Spectrophotometer Model IR-2
- Bulletin 147-A
- 1946
The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…
- Creator Of Work Beckman Instruments, Inc.
- Subject Scientific apparatus and instruments, Spectrophotometer, Infrared spectroscopy, Beckman Instruments, Inc.
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11 items
Model F resistor notes and diagrams
- 1946-Apr-08
Handwritten and -drawn notes detail the resistors used in the Model F 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 accurate…
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Letter from Arnold O. Beckman to Commanding Officer, Naval Training Center
- 1946-Apr-26
In this letter, Beckman requests that a former employee, Robert A. Crane, receive an early discharge from the Navy in light of his father's poor health. Beckman notes that he has an open position for Crane.
- Author Beckman, Arnold O.
- Subject United States. Navy, Beckman Instruments, Inc.
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11 items
Beckman Infrared Spectrophotometer, Model IR2
- Beckman Bulletin 153
- 1946-May
The cover of the bulletin includes handwritten notes about printing dates and quantities.
The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942,…
- Creator Of Work Beckman Instruments, Inc.
- Subject Scientific apparatus and instruments, Spectrophotometer, Infrared spectroscopy, Beckman Instruments, Inc.
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Beckman IR Spectrophotometer final assembly wiring
- 1946-May-20
The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…
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Beckman IR spectrophotometer power supply circuit diagram
- 1946-May-21
The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…
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Beckman Infrared Spectrophotometer amplifier circuit diagram
- 1946-May-21
The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…
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3 items
Company's Views Concerning the Union
- 1946-Oct
In a series of one page messages to the employees of National Technical Laboratories, Arnold Beckman laid out a case against unionization.
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Beckman Model H pH meter pictorial wiring diagram
- 1946-Oct-16
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity of his product. The resulting instrument kicked off…
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Beckman Model H pH meter schematic wiring diagram
- 1946-Oct-17
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity of his product. The resulting instrument kicked off…
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2 items
Letter from Edwin W. Taylor to Arnold O. Beckman
- 1947-Aug-15
This letter includes a report on existing Beckman trademarks as of 1947, including information on the "acidimeter" and the point at which that instrument became known as the pH meter (1935).
- Addressee Beckman, Arnold O.
- Author Taylor, Edwin W.
- Subject Hydrogen-ion concentration--Measurement--Instruments, Patents, Trademarks, Beckman Instruments, Inc.
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11 items
Instructions, Beckman Infrared Spectrophotometer, Model IR-2
- Bulletin 153-B
- 1947-Nov
The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…
- Creator Of Work Beckman Instruments, Inc.
- Subject Spectrophotometer, Infrared spectroscopy, Beckman Instruments, Inc.
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3 items
Beckman IR-2 Spectrophotometer Questionnaire
- Bulletin 191
- 1948-Jan
This questionnaire contains frequently asked questions and common issues with the performance of the IR-2.
The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O.…
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Beckman Model B Spectrophotometer
- 1948
The ultraviolet Model B was marketed as an easier to use and more affordable alternative to the Beckman DU Spectrophotometer.
The first Beckman Instruments DU Spectrophotometer was developed in 1940, when the company…
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Beckman Model B Spectrophotometer
- 1948
The ultraviolet Model B was marketed as an easier to use and more affordable alternative to the Beckman DU Spectrophotometer.
The first Beckman Instruments DU Spectrophotometer was developed in 1940, when the company…
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Front entrance of National Technical Laboratories
- 1948
Front entrance of National Technical Laboratories in South Pasadena.
- Photographer Rohrer, Larry
- Subject Factories, Beckman Instruments, Inc.