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Slide rule

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Date code stamp appears to read 11/68, which is consistent with the late model feature set shown on the rule. You might want to compare this.

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A W Faber Castell type 360 slide rule

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

As a result of this over-all design style and part number format, there are often very similar Faber-Castell rules which differ only in the body design, and essentially identical rules which differ only in scale length. Some rules also featured ‘addiators’ on the reverse side, to allow addition and subtraction as well as conventional slide rule operations. These combination rules are quite unique, and provided exceptional computing power in an all mechanical design.

Want to know how these addiators worked? This technique was also used by Aristo another German slide rule maker , but they used yellow as their trademark accent to match their packaging. While their first rules until were of ‘swiss pearwood’, there was a brief period where beech and maple were used, after that period they were made of ‘special wood’ a wood composite with laminated scale surfaces. Later Faber-Castell rules were generally made of an engineering plastic called Geroplast appears to be a type of PVC or Cycolac , with deeply embossed and filled scales.

Geroplast and the pigment used to fill the scales sometimes ‘bled’, resulting in a colored bloom around scale markings, or faded accent stripes if left out in sunlight. Most later rules were ‘self-documenting’, and had their mathematical relationships symbolically noted on the right hand side of each scale. Here’s what the catalog has to say about the various types of construction.

Faber-Castell 67/87 Rietz Simplex Slide Rule

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.

No blind date stamp – coversion tables & factors on a plastic book-mark. A.W. Faber-Castell, 4/60, Desktop Enhanced Mannheim, wood/celluloid veneers. 6 slide.

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. Copyright for the above image is held by MAAS and may be subject to third-party copyright restrictions. This includes artworks, artifacts, images and recordings of people who may have passed away, and other objects which may be culturally sensitive. Next Continue. Over the 19th and much of the 20th centuries the slide rule was the primary instrument for calculation used by many people engaged in the trades and in engineering.

Although originally invented in the 17th century, and widely used for gauging or estimating the quantities of certain products such as alcoholic spirits it took until around for the slide rule to become generally popular with those for whom mathematics was a daily task. His scales were the “C” and “D” scales, ranging from 1 the index to 10 and used for multiplication and division, and the “A” and “B” scales, ranging from 1 the index to and used for squares and square roots.

New arrangements of scales appeared in the 20th century with the Rietz arrangement in and the Darmstadt arrangement in

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.

products such as alcoholic spirits) it took until around for the slide rule to become generally popular with those for whom mathematics was a daily task.

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. This arrangement of scales is known as the “System Rietz,” developed by the German engineer Max Rietz in Underneath the slide is marked: [logo of weighing scales] A.

Under the slide is also stamped: I. Date codes on the back appear to read 53 and 1. Faber-Castell of southern Germany introduced the 67 series of slide rules in and sold them through about , although the form of logo on this example was only in use from to The date codes suggest a manufacture date of January The owner of the slide rule, Isaac Giancinto Molella — , was in the Cornell University class of Air Force at radar sites in North Africa and Europe between and Rodger Shepherd Mendham, N.

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Things are tough right now They’re tough for everyone : But when coronavirus hit here in the UK, the museum had to close its doors to the public, and we lost practically all our income overnight. No visitors, no workshops, no events, no school visits

English: Faber Castell 6 inch slide rule with case. Source, Own File history. Click on a date/time to view the file as it appeared at that time.

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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, Bids, Price ($), Text. Nov, 13, , Slide rule book Faber’s calculating rule Jan, 3, , Slide Rule – Book AW Faber.

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. The metric ruler is continued in the well. Complete with green and clear plastic case. Made in More photos can be seen on the Addiator page.

The Addiator shown on the Addiator page now has a negative window. It has a green, zip up case and a stylus.

Faber-Castell 2/83N Novo-Duplex

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.

Alro chemie showing atomic masses from j. Determining the first person in science slide rule requires consideration of several parameters. The interesting.

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

Chemical slide rules

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

“engineers in tights” made sure slide rule innovation persisted well specialist slide rules one made by German maker A.W. Faber-Castell (F-C) was particularly Schirdewan’s design dates from the late s it should come as no surprise.

As Dr. I was the first to open it. Also found on the front are the sine scales S and ST , double tan scales T1 and T2 , and a Pythagorean scale P, which gives the cosine of the angle on S. They can be used to compute square roots, or for multiplication and division with the precision of a inch rule. Like on most Castell rules, the scales are self-documenting, meaning that the scale name appears at the left end of the scale, and its mathematical formula is at the right end.

The instruction manual, in English, was in excellent condition, with just some yellowing of the paper with age no musty smells. Even the box it came in was in pretty good condition, with just a few worn corners and two bent tabs. Not bad for a something year old product. Also included was a plastic reference card, about the same length and width as the slide rule. One side gives a detailed description of the SI system of measurements, and the other side describes the basics of set theory.

Fred Friedman February 04, You have a beautiful collection.

Slide Rule. Suwak logarytmiczny