Technical Data Package; Data Provided for Retention with ID 66400697

Memphis, TN: Defense Industrial Plant Equipment Center, c1978. Presumed one of several Technical Data Packages produced. Disbound, had been comb-bound, now held together with binder clip. Format is approximately 8.75 inches by 11.25 inches. Approximately 160 pages/80 sheets. Illustrations and some references. Cover worn, torn, soiled, with a staple in the top center. The first page is a Security Record DD Form 1342 of 1 Feb 1966, The Record Validation was signed by Edward S. Bay, Chief, Adm. Br., PDRL. There are a number of hand written sections and changes in red and blue ink on this page. The description reads: Electrobalance, Gram Automatic, Cap. 100 grams precision - one part in 10,000 + 0.2 micron at lower ranges. Control Unit contains 19 electrical measuring ranges up to 20 grams, electrical zero suppresion, and electrical taring in 9 different ranges, with each range continuously variable. {in ink] Balance, Laboratory 100 Grams max ca. with manual. The present location was give as Frankford Arsenal, Philadelphia, PA. This is followed by a second DD Form 1342 of 1 May 1978, indicating that the item was free of contamination, visual inspection only. It was signed at the DRMO Watervliet, Watervliet Arsenal, by Alex Petro of the Equip. Br and Everett W. Lauster Equip. Spec. What follows is a technical data package from the Cahn Instrument Company on Electrobalances Models RG and RH. Cahn was apparently located in Paramount CA. The information in unpaginated and may be from several documents. The bulk of the material is the Instruction Manual for the Cahn RG Electrobalance which per the manufacturer also applied to the RH model. Most of the material appears to be contemporaneously produced Xerox style copies. Cahn Electrobalances have been and are widely used in vacuum weighing. At least one Electrobalance instrument model has been developed using an elastic ribbon suspension, with capacity in excess of 1 g. Precision is 0.1 µg. The instrument also has new circuitry to permit extremely long-duration runs at full precision without adjustment, and provision for taring to increase percentage precision, up to 2 ppm. The instrument can be used in high vacuum, and with samples which are at high temperatures. It is not affected by vibration, normal shock, temperature, or temperature changes. An obituary on Lee Cahn in the professional journal Analytical Chemistry noted that Lee Cahn was an engineer (not a chemist) and an inventor who extended the uses of the Electrobalance Principle. Condition: Good.

Keywords: Lee Cahn, Cahn Instruments, Electrobalance, Technical Data, Electrical Measurement, Everett Lauster, Alex Petro, Edward Bay, Watervliet, Frankford Arsenal, Scientific Instrumentation

[Book #84232]

Price: $125.00