Pickett slide rule for overhead projectors
Date: 1960s
Inventory Number: 1997-1-0975
Classification: Slide Rule
Subject:
Maker: Pickett & Eckel, Inc. (1943-1985)
Seller: Charles Beseler Company (1868-present)
Cultural Region:
Place of Origin:
City of Use:
Dimensions:
slide rule: 0.7 × 25.4 × 4.2 cm (1/4 × 10 × 1 5/8 in.)
case: 1.6 × 6.7 × 26.1 cm (5/8 × 2 5/8 × 10 1/4 in.)
box: 3.2 × 33.9 × 9 cm (1 1/4 × 13 3/8 × 3 9/16 in.)
Accessories: brown leather case with flap closure; cardboard box containing two paper advertisements
DescriptionRectangular clear plastic rule with three slides. The top and bottom slides are fixed to the back of the rule by metal screws, one at either end. The center slide moves to left and right. A clear plastic cursor with a vertical indicating line also moves to left and right.
Seven scales are printed on the face of the slide. Printed near the top of the top, fixed slide is a "K" scale composed of three logarithmic scales (values 1 to 10) printed side by side. Along the bottom edge of the top, fixed slide is an "A" scale composed of two logarithmic scales (values 1 to 10) printed side by side. An identical "B" scale is printed along the top edge of the center, moveable slide.
Printed along the center of the center, moveable slide is an inverted logarithmic scale "CI", with values descending from 10 to 1. Each value along the scale is preceded by a sideways chevron.
Printed along the bottom edge of the center, moveable slide is a logarithmic "C" scale, with values ranging from 1 to 10. An identical "D" scale is printed along the top edge of the bottom, fixed slide.
Near the bottom of the bottom slide is an "L" scale with values ascending from 0 to 10.
The slide rule is stored in a cardboard box containing a brown leather case with flap closure, as well as two paper advertisements for Pickett & Eckel, Inc. products.
Seven scales are printed on the face of the slide. Printed near the top of the top, fixed slide is a "K" scale composed of three logarithmic scales (values 1 to 10) printed side by side. Along the bottom edge of the top, fixed slide is an "A" scale composed of two logarithmic scales (values 1 to 10) printed side by side. An identical "B" scale is printed along the top edge of the center, moveable slide.
Printed along the center of the center, moveable slide is an inverted logarithmic scale "CI", with values descending from 10 to 1. Each value along the scale is preceded by a sideways chevron.
Printed along the bottom edge of the center, moveable slide is a logarithmic "C" scale, with values ranging from 1 to 10. An identical "D" scale is printed along the top edge of the bottom, fixed slide.
Near the bottom of the bottom slide is an "L" scale with values ascending from 0 to 10.
The slide rule is stored in a cardboard box containing a brown leather case with flap closure, as well as two paper advertisements for Pickett & Eckel, Inc. products.
Signedface, center slide, center left: CHARLES Beseler COMPANY / CAT. #7279;
face, center slide, center right: [Pickett & Eckel trademark] / MODEL ED-26
face, center slide, center right: [Pickett & Eckel trademark] / MODEL ED-26
FunctionThis slide rule was designed for use with an overhead projector, in order to demonstrate the use of a slide rule to solve mathematics problems (including multiplication, division, squares, square roots, cubes, and cube roots).
Curatorial RemarksSee related works for date.
ProvenanceFrom Science Center (Harvard University) set-up 5-30-78.