Slide rule

Interested in finding out more out about such calculating wonders? Then try one of the slide rule related articles often light-hearted I have published. Go to the search papers page. Part of unusual limited series made from high pressure laminated HPL wood with metal inserts – patent no. Slide chart designed as planisphere by Dutchman R. Harling – upside-down scales on the slide probably a design feature when inverting the slide – read more

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Faber-Castell TR3. Date of introduction: , Display technology: LED A.W. Faber-Castell, a German manufacturer of slide rules, introduced in the year ​.

Site Map. On This Page. Models Summary. Models by Type. Enhanced Mannheim. System Rietz. System Darmstadt. Log Log. System Hohenner. Slide Rule Content Pages.

Linear slide rules

A five-inch scale along the upper edge of the rule is divided to 32nds of an inch. Scales on the base and on the front of the slide are not lettered, but the scales on the top of the base correspond to K and A scales and the scales on the bottom of the base correspond to D and L scales. Scales on the slide correspond to B, CI, and C scales.

date codes: (source: ). Factory codes: 1st character, either alpha or numeric. Letter Code, Number Code, Factory. H, 2, Hamburg.

For slide-rule freaks only, a detailed list of my slide-rules. Instructions for using one are here. AW Faber Wooden structure with white plastic facing pinned on. Single-sided with double-sided slide. Two cursors, wooden with plastic window. S, L and T scales can also be read from windows on the back. Scales on the front are unnamed. Made in Bavaria. From the presence of a model number and the solid wood construction, this one is probably from around Thanks to Emrys for this one.

Larger: Front Rear. Single-sided one-piece plastic body, with windows on reverse to read S, L and T scales with double-sided slide in normal position. Single-piece plastic cursor with area of circle and W HP to kW.

My Slide Rule Collection

Definition from Wiktionary, the free dictionary. This is a file from the Wikimedia Commons. Information from its description page there is shown below.

List of my Faber/Faber Castell models with defining characteristics. Multiple date entries within a model number indicates multiple versions/examples. Click on.

Linear slide rules are what you may think of as “normal” slide rules – straight scales with a sliding section and usually a cursor. But they still come in all sorts of weird and wonderful variations, from tiny to big, and single to multiple sliders. Scale lengths in my collection range from 36 to mm 1. Accuracy ranges from 2. Tie clip slide rule My smallest slide rule, actually a novelty slide rule but it works just fine and is more accurate than you might think.

Carpenter’s slide rule An early late ‘s hand stamped 24″ two fold carpenter’s rule incorporating a brass-inlaid slide rule. Classic Coggleshall log scales on top. The first widely used standard form for a logarithmic slide rule is the two-foot, two-fold design devised by Henry Coggeshall around

Dating faber-castell slide rules

This object record is currently incomplete. Other information may exist in a non-digital form. The Museum continues to update and add new research to collection records.

Dating slide rules by the chemical data they provide. produced by Hemmi (​number ), Keuffel and Esser (), Faber (Chemie), Unique (O), ALRO (a disk.

British Broadcasting Corporation Home. At an introductory lecture from the Professor, we were told we would need a slide rule for the course. It was recommended that we buy the best one we could afford – “It will last you a lifetime”, he claimed. Following the advice, I went to the student stationery shop and bought the best I could afford, a Faber Castell. This instrument could multiply, divide, perform trigonometric calculations, raise numbers to any power and even calculate decimal roots.

But, by I was using desk top calculators and in about I bought my first pocket calculator, vastly outperforming the slide rule for multiplying and dividing although trigonometry, powers and roots came later.

Search my slide rule collection

It has a green leather slip case. The Addiator can be seen on the Addiator page. Inch ruler on upper edge. There are tables on the reverse. It has a black card case.

I’ve also managed to pick up a Hemmi slide rule magnifier for this dating of with it was developed by Faber in as an aid in keeping rules of decimal points.

From Wikimedia Commons, the free media repository. File information. Structured data. Captions English Add a one-line explanation of what this file represents. Summary [ edit ] Description Faber Castell 6 inch slide rule. I, the copyright holder of this work, hereby publish it under the following licenses:. You may select the license of your choice.

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Vintage Slide Rules

The first logarithmic calculating rules did not slide at all This ” Gunter’s Rule ” was the original device introduced by Edmund Gunter in , which remained in use for some two centuries. This idea remained for three centuries at the heart of every slide rule made. This instrument had a variety of useful scales and tables on one side and a standard 2-foot measuring rule on the other. The logarithmic calculating function used the narrow slide in one of its legs For more, see this article.

On this page I want to give some rules of thumb to determine the year of manufacturing of a Faber-Castell slide rule. Date stamp on the back. Most.

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.

Making examples from published templates is also fun. Some of these are illustrated below and, given the wealth of authoritative material available on the makers and models, I just add some comments on why they appeal to me and point out some major features. A selection of Web and other resources are offered at the end which discuss their history, manufacture, use, makers and their models. Their relative sizes and weights can clearly vary quite widely, dependent on the model style, materials and number of scales.


Vintage Sun Hemmi No. Welcome to our store. Made in Germany – date code 11 Front Scale. Back Scale. In photos all aspects of the item were captured, including any damage or ware.

in years. Slide Rule, Old Computers, Faber Castell, The Meaning of the Mayan Calendar End Date Within the Context of Modern Astrology. The Mayan.

One of the interesting questions with slide rules, is the date of manufacturing. With Faber-Castell slide rules this is generally not difficult, but there are exceptions. On this page I want to give some rules of thumb to determine the year of manufacturing of a Faber-Castell slide rule. Most Faber-Castell slide rules have on the back 2 embossed stamps that give the year and month of manufacturing. Mostly the left number gives the year, the right number the month.

All slide rules with a 3-digit type number starting with a 3 like or were manufactured before All slide rules with a mixed type number like e. Plastic slide rules which start with like e. Slide rules entrely made of plastic only appeared in All wooden slide rules manufactured after have a split stator which gives some flexibility to the strength with which the slide is held.

Older slide rules have a stator in one piece. Most wooden slide rules manufactured after have small, tapered, hardwood pins to fasten the celluloid scales to the wood of the stator or the slide. Earlier slide rules do not have these pins.

Faber-Castell 67/87 Rietz Simplex Slide Rule

The rule is clearly marked A. Faber – the name was changed to Faber-Castell in see P. I have a copy of C. Pickworth’s book ” Revised Instructions for the use of A. This gives other clues as to the age of the rule. From internal evidence and a date written on the front, the edition I have was published in or before

Faber Castell Slide Rule 1/87 Rietz Date Code 52 In Wooden Storage Box. EUR From United Kingdom. EUR postage.

Although the date codes were prominently engraved and paint-filled in the early years, from the late ‘s onward they can be hard to spot as they are only lightly engraved in small letters, often near an edge. According to Collection Spivey’s research project on Hughes Owens, the switch from dating old 17xx series rules to the new xxx series took place between June and August. Moreover, Hughes Owens also adopted dating brand name Geotec for its slide rule and drafting products somewhere between June newspaper May.

I rules working on an rules Slide Rules in Canada page that will feature more information about the Hughes Owens company and its collection, including the rules catalogs in my collection. Please stay tuned! The premiere slide rule made by Hemmi, this model is better known as the Dating Versalog this specimen is actually collection second rules for the original Versalog model, generally designated as Ib. I’ve a fondness for collection used in Canada, though, hence my preference for Hughes Owens models.

This particular specimen book rules excellent shape, as both the rule and case dating rules though they’ve barely been used date code ME, or May,. In fact, collection virtually unmarked leather case still has rules “new” leather smell I newspaper you’ll just have to take my word for it.

IM2012 Evolution of Faber Castell Slide Rule Duplex Cursors