Hemmi Simplex Pocket Slide Rule Retailed by Post (1441)
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- Frederick Post Co.
- SUN HEMMI JAPAN CF
- This small (five-inch) one-sided slide rule is bamboo covered with white celluloid, with a clear celluloid and metal backing. A magnifying glass indicator has a metal frame. There are A and D scales on the base. The slide has B, CI, and C scales on one side and S, L, and T scales on the other side. The upper edge of the base has a four-inch ruler divided to thirty-seconds of an inch.
- The back of the base is marked: THE FREDERICK POST CO. NO. 1441 (/) SUN (between two drawings of the sun) HEMMI JAPAN CF. A brown leather case is stamped on the flap: POST. Inside the case is stamped: MADE IN JAPAN and handwritten: R. FREEZE.
- The instrument was made by the Hemmi Slide Rule Company of Tokyo, Japan, and sold by the Frederick Post Company of Chicago, Ill. In the 1930s and 1940s, Post sold this model for $2.70. The code CF on the slide rule indicates that this example was manufactured by Hemmi in June 1952. The donor, Richard Freeze, purchased it in Philadelphia around 1956–57, when he was a student at Drexel Institute of Technology (later Drexel University). He used it during classes in physics, mathematics, and industrial engineering. Later, he used it while working at a specialty chemical firm doing industrial engineering projects.
- Compare to 1995.0087.01.
- References: Accession file; Peter M. Hopp, Slide Rules: Their History, Models, and Makers (Mendham, N.J.: Astragal Press, 1999), 183–187, 211; Posts Dependable Drawing Materials, 18th ed. (Chicago: The Frederick Post Company, 1936), 173. Price lists for this catalog, dated August 1937 and May 1940, show model 1441 on pages 11–12 and 27–28, respectively.
- Currently not on view
- Credit Line
- Gift of Richard G. Freeze
- ID Number
- accession number
- catalog number
- Object Name
- calculating rule
- slide rule
- Physical Description
- celluloid (laminate material)
- bamboo (overall material)
- leather (case material)
- glass (cursor material)
- overall: 2.2 cm x 12 cm x 1.9 cm; 7/8 in x 4 23/32 in x 3/4 in
- in case: 3.3 cm x 13 cm x 2.1 cm; 1 5/16 in x 5 1/8 in x 13/16 in
- place made
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Slide Rules
- National Museum of American History
- Rule, Calculating
- Record ID
- Metadata Usage (text)
- GUID (Link to Original Record)
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