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instructions for using "The Ballantine Rule"
instructions for using "The Ballantine Rule"

instructions for using "The Ballantine Rule"

Datecopyright 1953
Inventory Number1998-1-1372b
ClassificationSlide Rule
Subject
    Maker Ballantine Laboratories, Inc. 1934-present
    Maker Perrygraf founded 1934
    Cultural Region
      Place of Origin
        Dimensions22.2 × 9.6 × 0.1 cm (8 3/4 × 3 3/4 × 1/16 in.)
        Material
          Accessories"The Ballantine Rule," see 1998-1-1372a
          DescriptionWhite paper booklet printed in black ink.

          Instructions for using the "VOLTS--DB POWER LEVEL" side of the slide rule (1998-1-1372a) are printed on the left half of the inside of the booklet. Instructions for using the "DB--RATIO CONVERSION" side of the slide rule are printed on the right half.
          Signed 1998-1-1381
          Inscribedcover, center: Ballantine logo
          Curatorial Remarksactual weight is too small to measure
          FunctionContains instructions for operating "The Ballantine Rule," see 1998-1-1372a.
          "The Ballantine Rule" slide chart for calculating voltage decibels
          "The Ballantine Rule" slide chart for calculating voltage decibels
          Ballantine Laboratories, Inc.
          Date: copyright 1953
          Accessories: Instruction booklet, see 1998-1-1372b
          Object number: 1998-1-1372a
          Masco "Sound Surveyor" slide chart
          Masco "Sound Surveyor" slide chart
          Perrygraf
          Date: copyright 1949
          Object number: 1991-5-0002
          Scofield-Thacher Engineer's slide rule
          Scofield-Thacher Engineer's slide rule
          Edson Mason Scofield
          Date: patented 1901
          Object number: 1989-1-0001
          Barth's gear slide rule
          Barth's gear slide rule
          Carl G. Barth
          Date: circa 1902
          Object number: 1990-5-0005
          electronic A.C. voltmeter
          electronic A.C. voltmeter
          Ballantine Laboratories, Inc.
          Date: 1947-1960
          Accessories: one small plastic card: "Use the Ballantine voltmeter. . .".
          Object number: 2006-1-0065
          Pickett Vector Dual Base Log Log slide rule, with Twin Pack accessories
          Pickett Vector Dual Base Log Log slide rule, with Twin Pack accessories
          Pickett & Eckel, Inc.
          Date: copyright 1959
          Accessories: brown leather case with hard plastic lining and flap closure; small plastic bag; Twin Pack box; 3 instruction manuals (in file); belt loop (1991-4-0004b); pocket slide rule (1991-4-0004c); cardboard box
          Object number: 1991-4-0004a
          bomb scoring slide rule, broken
          bomb scoring slide rule, broken
          S.V.E.
          Date: 1930-1960
          Object number: 2003-1-0251
          Concise circular slide rule
          Concise circular slide rule
          Concise Company, Ltd.
          Date: circa 1960
          Accessories: attached case; instruction booklet (with instrument)
          Object number: 1989-1-0016
          lightning decibel calculator, type D
          lightning decibel calculator, type D
          Date: circa 1935
          Accessories: four brochures for the Lightning Calculators, types A - D in library (Lib.4598a-d)
          Object number: 1998-1-1375
          concrete volume slide rule
          concrete volume slide rule
          L. E. Livingston & Son
          Date: copyright 1957
          Object number: 1997-1-1641
          Dyna-Slide two-slide blank slide rule
          Dyna-Slide two-slide blank slide rule
          Dyna-Slide Company
          Date: circa 1962
          Accessories: paper envelope for storage, "The Designing of Special-Purpose Slide Rules" by Donald D. Hedberg, Dyna-Slide Company 1961, stored in instrumen file
          Object number: 2004-1-0382
          Gisholt machining time slide rule
          Gisholt machining time slide rule
          Gisholt Machine Company
          Date: patented 1922
          Accessories: black leatherette case
          Object number: 1990-5-0001