Dating k&e slide rules
Nevertheless, after well over years of development, the final slide rules were beautiful well-machined works of art, let alone reasonably accurate calculating devices. Final Deci-lon production, no model number or grip lines on slide. Cooke , of the Navy's Radio Materiel School , thousands of which were made.
Unfortunately most of the closing flap is missing, but you can still see the stitching in the high resolution pictures. HP Sting Battery Pack. There are cases of entire models coming and going between full line catalog issues.
From Wikipedia, the free encyclopedia. I was recently given a Deci-Lon 10 that looks identical to yours, except: This Beginners rule is just that And the vast majority of cursors contain a patent date printed on the end pieces For a comparison, you might want to check out my Dietzgen page for some competing similar models of the same time period.
The Slide Rule
The patent was for generic construction techniques used on all Mannheim type rules. The belt loop was missing yes, you could clip your slide rule to your belt so it was on hand at every moment. I'll be glad to write a little intro to using a slide rule.
The label in the case says "W. This rule is virtually identical to its close cousin of the same time period, with the replacement of the cubic and inverse D scales with Th, Sh2, and Sh1 scales on the backside.
Johny_Niks - 02.01.2018 in 02:06
Seems to be quite the slide rule. Appears to be a re-numbered rule.
LyiZa_Pinkman - 07.01.2018 in 11:34
In fact, the rule has never been cleaned and still has its original luster and shine! It's very rare to find them in this condition today!
CHEAT_MASTER_RU - 14.01.2018 in 22:44
Serial numbers can be used to approximate the manufacture date of a given rule however not necessarily the sales date. I had a fairly cheap Blundell-Harling for my exams, but it was a duplex — that is, it had scales on both sides — so I felt like I was the man.
Jimmy_Rukokogs - 25.01.2018 in 03:10
Click for other side! Over the course of production, they carried an extensive range of slide rule models, although they frequently changed their model numbering schemes in the last couple of decades of slide rule production, confusing matters considerably for collectors.