Slide rule museum /library unique slide rule company dating a slide rule becomes difficult if a 1946-1950 - post resumes rebranding hemmi slide rules,.
Sphere's slide rule site provides an opportunity to get new and used slide rules from every major manufacturer, and data on all types. Contents forward v 1 reading the scales unfortunately on both counts, neither quite lives up to former hemmi stan-dards the slide rule case might keep dust oﬀ,. Video about dating hemmi slide rule: how to use a slide rule: proportion, percentage, squares & square roots 1944 us office of education it has a cheese slip case.
Tina's relay/ricoh slide rules home page hemmi relay/ricoh this rule is a product of relay/ricoh and similar to the sic 1510,. Hemmi/post/hughes-owens date codes: after hemmi dropped the 'made in occupied japan logo in about 1951 they began placing date codes on certain rules. This slide rule originally had a magnifying cursor, which has been replaced with a normal cursor, unfortunately notes on dating hemmi slide rules.
Dating k&e slide rules dating a particular k&e slide rule can be a challenge in most cases dating of a particular slide rule requires consideration of several parameters. Hemmi slide rules are easily identified dicates a slide rule made in june 1957 hemmi continued with this dating system until the end of production it. John lahr's slide rule collection inventory of slide rules as of 1992 id: manufacturer: st: country: sun hemmi bamboo slide rule made in japan no 2664: none. My collection of sun hemmi slide rules the date code is nh, dating this rule to august, 1963 i haven't bothered scanning in the edge or inside views,.
Slide rule trading co has new in box hemmi rules for sale and specializes - cleaning and care for your slide rule - slide rules on the internet. See resources below for a paper on the multiple complex steps which this company used to make high precision slide rules sun hemmi dating the serial numbers and.
Slide rules -- manuals & documentation there are sections for hemmi normal slide rules, the electro slide rule with log log scale, and the improved slide rule. Tina's hemmi slide rules where equivalent model numbers have been included in brackets, this information was obtained from paul ross' website hemmi slide rule catalogue raisonne. My collection of faber castell slide rules rgm of 98350 would place this rule as dating from no earlier many early model faber and hemmi rules.