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    • Appraisal of competitors electrodes
    • 1954-Apr-15

    The report concerns Beckman's electrode business, with a focus on Leeds & Northrup electrodes which "do not compare too favorably with ours."

    • What is new about L & N electrodes
    • 1955-Aug-15

    The report concerns the business of electrodes, including legally challenging questions about possible patent infringement.

    • Dwg. No. 18617
    • 1957-Apr-22

    This oxygen electrode was first used inside Beckman Instruments pH meters and later in many other instruments.

    • 1936-Aug

    This report outlines the colorimetric and electrical ways to determine the pH of a solution and the various kinds of electrodes that can be used with electrical instruments. Beckman concludes that a method using glass…

    • 1956

    Although the author is unknown, these instructions were most likely written by a Beckman Instruments employee. This glass electrode was used in Beckman pH meters.

    Arnold Beckman invented his first pH meter in 1934 at…

    • 1985-Dec-06

    The press release announces the Beckman Futura II Calomel Combination Electrode.

    • 1978-Dec-07

    The kit included buffers, storage solution, rinse, and a storage rack. Beckman oxygen electrodes were first used in their pH meters and later with other instruments.

    • Dwg. No. 293-000239
    • 1935-Oct-11

    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…

    • 1979-Jun-15

    The support stand made it easier to move electrodes between samples without tipping or using the electrodes' vertical alignment.

    • Dwg. No. 11098
    • 1957

    This electrode was first used inside Beckman Instruments pH meters and later in many other instruments.

    • 1954-Sep-26

    These handwritten notes on glass electrodes appear to be signed Noel B. Brayman.

    Glass electrodes were used in Beckman pH meters and various other instruments.

    • 1952-Jul-18

    The illustration depicts glass electrodes that could be used with the Beckman Model G pH meter.

    Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who…

    • 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.

    • 1955-May-10

    The handwritten notes appear to be signed Noel Brayman.

    Glass electrodes were used in Beckman pH meters and various other instruments.

    • Final draft
    • 1955-Feb-25

    The foldering of this document suggests it was written by Edwin Arthur. As in a 1957 document, "beauty" was the first criteria to be evaluated.

    The glass electrodes were used in Beckman pH meters and various other…

    • 1950 – 1969

    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…

    • 1960s

    This electrode was designed for use with a 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 way to measure the acidity…

    • 1980s

    Beckman's Futura II Calomel electrodes were introduced in 1985. Sized to fit in test tubes, they were designed for medical and biotechnology applications.

    • Undated

    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…

    • 1937-Aug-26

    In this letter, Evans discusses a new electrode design for use in Beckman pH meters.

    Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an…