Slide rule

Slide rule What may be treated as a strange thing, or ruler for calculating as a name, although it is doubtful. Of course, multiplication and division can calculate a triangular function, logarithm, the cubic root, etc. at 3 figures the number of effective figures now. Well, since square root calculation was seemingly done also by the mechanical calculator which does only multiplication and division a long time ago, it is not wonderful.

A strange thing -- the reason attached to the favorite pilot watch of the person who likes ..., that is, a slide rule function even now I will calculate the distance something which can be flown, turning the dial of a clock.

In the public junior high school along which I (birth of the 1960s) passed, the slide rule was treated by the lesson. By this age, it should not usually treat. There is also a slide rule club and members aimed at the skill certification examination which the chamber of commerce was performing. And the friend owned several very gorgeous.
I also own two. This is "No.260" of HEMMI. For high-class machine technology. It is made of ply-bamboo so that neither curvature nor deviation may arise. Resin is stuck on the surface. It is glad to move so that there may also be none of few slack and glide-rule may be slippery literally. Although slack does not have the cheaper one which it had one more, either, since it might slide too much occasionally, a candle is rubbed.

"HEMMI slide rule incorporated company" also does business as a printed circuit board maker now. Seemingly, it was proud of 98% of the domestic market share world market share 70% of the slide rule former years. However, while the word of a "slide rule" remains in the company name, nothing is put on the Web page of the company. I am sad!

--Return--