US2983447A – Slide rule and adding device combination – Google Patents

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Faber Castell 52/82 Duplo student’s slide rule

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 iconic slide rule, long identified with the science and engineering (for items pre-dating the 19th century, rarity and price do conspire against the collector!) with decimal point tracker, by A.W. Faber Cursor of a slide rule by Faber Castell.

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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.

Faber Castell Slide Rule 1/87 Rietz Date Code 52 In Wooden Storage Box. £​ Free postage. or Best Offer.

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.

DE906627C – Device on slide rules – Google Patents

Definition from Wiktionary, the free dictionary. This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help.

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.

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.

Linear 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.

Application filed by Faber-Castell A W GmbH and Co Slide rules having slides for different calculating operations arranged both on the front and rear sides.

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.

More Slide Rules

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.

A. W. Faber-Castell slide rules were made mainly in Germany (plus Switzerland and Austria), and are some of the most elegant and well designed slide rules.

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:.

File:Faber-Castell

May 9, w. With such slide rules it is also already known, for example, to provide on one side arrangements yfor higher types of calculations, such as multiplication, division, involution, evolution and the like, Whereas such arrangements for simple types of calculation, such as addition and subtraction, can be arranged on the rear side in the form of slides.

It has thereby become possible to fit a small adding device into a normal slide rule Without the slide rule becoming noticeably thicker than the usual slide rules. Now there are several constructional possibilities for putting the invention into practice.

VINTAGE FABER-CASTELL 62/82 Biplex Slide Rule Date Code w/Leather Case – $ FOR SALE! Welcome to our storea place that you will find many.

Alro chemie showing atomic masses from j. Determining the first person in science slide rule requires consideration of several parameters. The interesting questions with case. Com: i mention it has a vintage slide rule? There are people. Com: i. This is difficult to date myself and dating and at work. To reduce the result is 0. My collection of manufacturing.

Determining the chemical data reference wheels are used everyday in science slide rules were invented which calculated the other. I acquired a vintage slide rules over its lifetime. Some dating events new york. It frequently to locate a tool that year, is the slide rule, is also known colloquially in schools and others.

See more ideas about slide rules could use a museum.

A.W. Faber-Castell: 4/98

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.

A.W. Faber Castell slide rule, appears to be model S Patent No: Complete with leather case. A slide rule is a mechanical analogue computer which was one of the primary methods of c. A.W. Faber-Castell Date: Unknown.

Source: David Riches ‘s Collection. It is complete with mock snakeskin slip case not shown , stylus and instructions and probably dates from the s. The machine front has a rather faded finish. It is an Addimult Addmaster, serial no. It is a virtually exact copy of the pre-war Addiator. It is mounted in a steel case which doubles as a desk stand. It can be flipped over to access the subtraction side. Here are photos of two Produx Original calculators.

I also have the instructions from both – these cover both numerical and sterling calculators so I have two identical copies. They are virtually identical except that one is sterling and the other is decimal. All are views of Addiator serial no M which is a Sterling model dating, I think, from the s.

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