Precision to contact him directly. Log Log scales are folded 80 inches long with a range from 0. The LL scales are on both sides, along with the C,and D scales which are duplicated on both sides. Over-range extensions on C and D scales. Normally supplied in a molded, rubberized case. Has 28 scale sections. White T coated aluminum construction, black and red scales, dual log scale design in one of Pickett’s most powerful rules. This is a very sophisticated 32 scale rule , made in the trademark aluminum body format by Pickett, one of my Favorite Pickett rules, with a much less cluttered layout than the N4, without sacrificing important functions. Eye-saver yellow ES coated aluminum construction, black and red scales, dual log scale design in Pickett’s most popular power rule set. This is a very sophisticated 34 scale rule , made in the trademark aluminum body format by Pickett.

Slide Rules of the Gods

The slide rule , also known as a slipstick , [1] is a mechanical analog computer. The slide rule is used primarily for multiplication and division , and also for “scientific” functions such as roots , logarithms and trigonometry , but does not generally perform addition or subtraction. There are many different styles of slide rules. Generally, they are either have a linear form or that of a circle. They have a standardised set of markings called scales.

Here are some of the slide rules I’ve made for my own use. This book came with a Keuffel & Esser N (labeled “R. Frazee”) which I’ve dated to This one is a Pickett, as are most of the ones I’ve seen going on eBay for hundreds.

This version does both days and weeks from now or any date to any date. Very handy for determining when those ‘8 week delivery’ items will really arrive. Instructions are printed on the rear. These will be a stock item for us replaces discontinued 7 and 8 inch previous models , so we can supply any quantity with some delay. Yes, Made in USA. These are being discontinued in favor of the blue style above, no more when these are gone.

Datalizer 7 Inch Date Finder Like this rule? These will be a stock item for us, so we can supply any quantity with some delay. Datalizer Date Finder Like this rule? This version does both profit on cost and profit on selling cost, making it very handy in any sales environment. Datalizer Profit Dial Like this rule?

British Thornton Slide Rule

By Maribeth Keane — November 12th, In this interview Mike Konshak talks about collecting vintage slide rules , and their history and uses. I talked to some other collectors about if you had to have a slide rule, which one would it be?

Hartung, Maurice L. How to use the Ortho-phase duplex slide rule. Pickett & Eckel, PDF. Date.

Bob’s Calculators and Slide Rules. Search this site. Caclulated Industries. Hewlett Packard. Radio Shack. Texas Instruments. Measuring Rules. Lightning Adder. Speedee Add-A-Matic. Star Adding Machine. Printed References. Allegheny Plastics. Bifold Gunter Rules. Boucher’s Stanley.

My Slide Rule Collection

Eye-Saver Yellow Catalog. Pickett was an American manufacturer of slide rules characterized by all metal construction. Eckel started out making all-metal slide rules in using magnesium and later evolved to aluminum as aluminum alloys became more machinable. Pickett slide rules were chosen to be used by the Apollo astronauts on their mission to the moon, as they were lighter than their wood core counter parts.

Pickett No. C Circular Slide Rule Set. ” aluminum circular has trig and log​-log scales. Eye-saver yellow, with original box, instruction booklet and.

Greg’s Slide Rules. What’s new. What’s New. Slide Rule Collection. Books Manuals Downloads. Collectors Traders Other. About this site Contact me.

Suggestions for Dating pre-1920 Faber-Castell Slide Rules

Comes with a leather clip-case, two booklets, guarantee certificate and original box. Did you know… Buzz Aldrin carried a Pickett ES with him on his Apollo 11 moon mission and walked on the moon with it in ! Condition Report: Pocket slide rule is in like new excellent condition, case show a slight indentation from being stored in the box and box itself shows shelf wear and writing. Nothing significant, we only mention for accuracy.

Hemmi Model 8 Pocket Slide Rule with Magnifying Cursor. It appears to Hemmi , Date Code FC, March (Post , Hughes-Owens ). Hemmi.

Low cost two color simplex rule. Plastic body rule with unusual blue tinted slide and two color scales. Basic student rule with trig scales, the T, ST and S scales have complimentary angles marked in red, and the scales are all self-documenting on the right hand side. Reversible slide has 3 log log scales. Unbreakable plastic cursor. About June, The last Post Versalog II is made. Plastic body duplex rule with trademark green accent stripes on fundamental scales, and multi-line cursor.

Rule face is self-documenting, with scale functions listed, as well as scale letters. Rule is self documenting on right hand side for all scales. After seeing so many slide rules it may appear confusing to see so many scales close together one one slide rule. Here is a list of the most common slide rule scales. Often used numbers such as Pi, e, conversions and other ratios can be found as Gauge Points on some scales.

Linear slide rules

I bought my first scientific calculator in a Decimo E, ‘Electronic Slide Rule’ and my ‘analogue calculator’ rapidly gathered dust. It was only about two years ago that I renewed a latent interest in them and started to explore the many superb resources available, which prompted me to purchase a selection. I wouldn’t describe myself as a collector, I bought one example each of styles and of makers that particularly interested me and my ‘collection’ has stopped at eleven.

Date probably s. Pickett & Eckel NT Hi Log Log ten inch duplex slide rule. Aluminium open frame with plastic cursor and “traditional” white scales.

The story of Bill Hewlett’s iconic computer in a pocket. I don’t in fact have either one, so it could be that the plastic is marvelous in the flesh. I simply refuse to believe that I wouldn’t prefer mahogany or bamboo. Or even…. Now these guys were in fact heroes. No need for tattoos or Balthus-inspired math lessons. Not my favorite, in fact, but it’s at the top of many collectors’ lists.

The Nestler 23R. An oddly basic Rietz rule, given that it was favored by both Einstein and Wernher von Braun. They succeeded. Sphere’s Slide Rule Universe is a repository for slide rule information, pictures, history and links to sellers, other slide rule sites and experts, and an on-line slide rule store. This is a double-sided circular slide rule calculator consisting of concentric moveable circles made in

The Slide Rule