Aristo Hyperlog Nr. 0972

The Hyperlog 0972 was the "top of the range" of the Aristo slide rules. It was produced in Germany from the early 1970's (very possible after 1972, because this high end rule does not appear in the 100th Anniversary booklet) until Aristo's closure in 1978. This rule can be considered the successor of the Hyperbolog 0971, but more powerful and massive. This "huge" slide rule,(6.5 cm = 2.55 in by 37.0 cm = 14.5 in), was fabricated with high grade PVC (Astralon/Aristopal), plastic braces, and all plastic cursor with four gauge lines for quick HP-KW conversion. Is a great slide rule for electrical engineering applications, incorporating to the standard logarithmic and trigonometric scales, hyperbolic sine and tangent scales, as well as two Pythagorean Scales.

With its 32 scales, the 0972 is the most powerful of all the general purpose Aristo rules, The scales on this rule are: H2, Sh2, Th, K, A [ B, T, ST, S, P, C ] D, DI, Ch, Sh1, H1 on the front face, and LL00. LL01, LL02, LL03, DF [ CF, CIF, L, CI, C ] D, LL3, LL2, LL1, LL0 on the back face.

According with the engraved serial number on the specimen shown below (2LS 3), this was fabricated in 1973 in the Hamburg facility, This specimen has also the not very common cursor enhanced with a magnifier glass.

Click on the next links to see professional panoramic pictures of the 0972 model.

https://www.sliderulemuseum.com/Aristo/Aristo_0972_FrancoMaddaleno.jpg

References:

• Robinson, William K. : Slide Rules with Hyperbolic Functions. Journal of the Oughtred Society, Vol 14, No. 1 2005. pp 55-62, https://osgalleries.org/journal/pdf_files/14.1/V14.1P55.pdf

• Robinson, William K: LISTING OF ALL KNOWN SLIDE RULES WITH HYPERBOLIC SCALES, www.oughtred.org/jos/robinson-hyperbolics-dec06.html

• Smith Hughes, Richard: Watch your Ps and Qs -The Pythagorean Scales- Are They Worth the Effort? Journal of the Oughtred Society, Vol 15, No.2, 2006. https://osgalleries.org/journal/pdf_files/15.2/V15.2P50.pdf