For over 50 years ago, De Leon Import & Export Corporation distributed the ideal slide rules acceptable for all markets in the world. Hemmi Bamboo Slide Rules were supplied to students and professionals in the Philippines by the company and today, continues to distribute modern and efficient instruments to an array of specialized fields.
After steady research for many years, Hemmi Bamboo Slide Rule Manufacturing Company finally reached to a top level of technique assuring to make the slide rules of excellent quality applicable for all purposes of calculation.
Now, we have the pleasure of recalling just a few of the important properties on Hemmi Bamboo Slide Rules.
The Hemmi Bamboo Slide Rules are built to perform in different Engineering studies. Click on the slide rule and see a larger image of it along with information on its application, scales, accessories and instruction manual.
The No. 32 slide rule is the smallest pocket size rule with a semicylindrical lense. Quite popular for its magnifier, enlarging the scales twice as much for easy reading.
The No. 32 slide rule is the smallest pocket size rule with a semicylindrical lense. It is built with a magnifier to enlarge the scales two times more for easy reading. Smallest pocket size of No. 50 W.
The slide rule has the following scales: A, B, CI, C, D, K, S, L, T
No. 255 is a Duplex Type slide rule built for Electrical Engineering.
Simplification of of Hyperbolic Function and Vector Calculation
No. 257 is designed for quick solution of various calculations in chemical engineering.
Designed for quick solution to various calculations in chemical engineering
In addition to all the special features of No. 259 D, the No. 260 slide rule is also equipped with the P scale to facilitate the determination of cosθ and other calculations by merely setting the indicator.
Superb quality of Hemmi Slide Rules consisted in a standard uniformity achieved through the process of accurate machine control, especially by the precision gauge system in the practice of mass production.
All scales were engine-divided in sharp on snow-white celluloid by special graduation machine, which ensure on easy-to-read markings and invariable accuracy in calculations.
Hemmi Slide Rules were constructed carefully from selected and well-seasoned laminated bamboo, which were most adequately joined together and combined in the very one rule assuring an everlasting protection against warping or swelling under varying climatical conditions.
Bamboo was inherited of its special nature that permits silk-smooth adjustments of the rule’s slide action to suit the slightest preference.
All scales are engine-divided in sharp, snow white celluloid by special graduation machine, which ensure an easy-to-read markings and invariable accuracy in calculations.