Impact Metric Converter Slide Rule for Regal Beloit

Description
Around 1970 many American companies and government agencies encouraged Americans to adopt the metric system. Regal Beloit of Wisconsin and other manufacturers of cutting tools and gear boxes adopted the units of measure and distributed devices like this one to assist in their use.
The one-sided white cardboard rule is printed in orange and black and has eight windows. Two logarithmic scales on the slide are viewed through four of the windows so that the user can convert between yards or feet and meters; centimeters and inches; pounds and kilograms; and tons and metric tons. Two more logarithmic scales on the slide permit conversions between square yards and square meters; square centimeters and square inches; cubic yards and cubic meters; and liters and imperial gallons or U.S. gallons. Below the windows is a scale for converting between Celsius and Fahrenheit temperatures. The rule is marked: REGAL BELOIT. It is also marked metric/inch (/) CONVERTER. It is also marked SWANI PUBLISHING COMPANY (/) P.O. Box 284 • Roscoe, Illinois 61073 (/) 815 / 389-3065.
The back of the rule has small windows for reading conversions between fractional inches, decimal inches, and millimeters from columns of numbers printed on the slide. Tables of equivalents appear above more windows for reading conversions between inches and centimeters and miles and kilometers. After another table of prefixes and equivalents, instructions for using this side of the rule are provided. More small windows permit conversions between U.S. gallons and liters and cubic feet and cubic meters. At the bottom, the rule is marked: DISTRIBUTED BY (/) C-6862. The back of the slide is marked ©1971, IMPACT, Culver City, Callf. (/) Printed in U.S.A.
Impact was presumably a printing company. Swani was a division of Regal Beloit that published a few elementary textbooks on the metric system. Compare this rule to 1990.0689.01.
Location
Currently not on view
Object Name
slide rule
date made
1971
maker
Impact
Physical Description
paper (overall material)
Measurements
overall: .3 cm x 20.7 cm x 8.4 cm; 1/8 in x 8 1/8 in x 3 5/16 in
place made
United States: California, Culver City
ID Number
1990.3231.01
nonaccession number
1990.3231
catalog number
1990.3231.01
subject
Science & Mathematics
Mathematics
Slide Rules
Rule, Calculating
Measuring & Mapping
Conversion Chart
Metric System
See more items in
Medicine and Science: Mathematics
Slide Rules
Metric System
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of George A. Norton III
Additional Media

Visitor Comments

Add a comment about this object

Submit a comment or ask a question about this object using the form below. Submissions are moderated and may receive a curator response. Please note that we cannot evaluate or appraise your personal artifacts. For other questions or general inquiries please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Image CAPTCHA
Enter the characters shown in the image.