Straight Edge Signed I. R. C. Co.

This undivided black hard-rubber rule is beveled along both long edges. It is marked: I. R. C. CO. (/) GOODYEAR. Scratched on the back of the rule is: Brereton. IRC, or Inoue Rubber Company, was established in Japan in 1926 to make bicycle tires and tubes. The reference to Goodyear is likely to the manufacturing process pioneered by Charles Goodyear and not to the Goodyear Tire & Rubber Company. Brereton was presumably the original owner of the instrument, which was acquired by the Museum in 1961. Compare to MA*327306.
Reference: IRC Tire, "About Us,"
Currently not on view
Object Name
date made
Physical Description
hard rubber (overall material)
overall: .5 cm x 45.4 cm x 3.6 cm; 3/16 in x 17 7/8 in x 1 13/32 in
ID Number
accession number
catalog number
Scale Rules
Science & Mathematics
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Scale Rules
Data Source
National Museum of American History, Kenneth E. Behring Center

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