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Dating slide rules by the chemical data they provide. Slide rules are not the core of my collection, which consists mainly of mechanical calculators and planimeters. Yet I could not resist the temptation to buy a Nestler Chemiker 33 slide rule. This slide rule contains scales with molecular masses to assist chemists in synthesis and analysis. Slide rules with the same function were already made in the nineteenth century. At the back of my Nestler is a table of atomic masses. I tried using those masses to date the slide rule. Chem Soc. The determination of atomic masses is not an easy task.

Albert Nestler Timeline

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Albert Nestler Slide Rule No 21 Darmstadt with case. OLD KEUFFEL & ESSER N SLIDE RULE W/ORIGINAL CASE June 5 Patent Date.

How much building material do we need? Should we mix up 25 bags of cement, , or 2,? Before you look to solve a problem precisely, you should have a feeling, deep in your gut, as to what a proper answer should look like. As someone who started his computer science career by programming calculators like the HP and the TI back in high school, I was exposed to slide rules at the tail end of their era. I have a Nestler 23 model that was enjoyed by scientists like Albert Einstein and rocket engineer Werner von Braun.

Slide rules inspire me. Slide rules are practical. They multiply.

Slide Rules of the Gods

It takes time to find and restore these rules, so please be patient. Just in, won’t last long These sets include the soft leatherette case and rule.

I talked to some other collectors about if you had to have a slide rule, which is that any slide rules that were imported into America, like the Nestler or the They show different slide rules and the history and different dates.

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.

Linear slide rules

In an earlier Micscape Lite article I shared my enthusiasm for the appeal of slide rules as collectibles and also for modern day use. I used one myself at high school in the mid 70s but by the late 70s, small electronic scientific calculators became widely available and cheap. For many calculations, significant figures provided by the typical 10 inch slide rule were more than adequate and it has been frequently noted that many engineering and technological feats of the late 19th and much of the first half of the 20th century were designed and built with the aid of the not so humble slide rule.

But when greater precision and accuracy was required without the tedium of using extended log tables, the scales were lengthened in the typical model designs shown below. These so-called long scale slide rules are often of particular interest to collectors partly because of their different design approaches, attractiveness as mathematical instruments and sometimes their sheer physical presence. In this article I show some of the different approaches used and is illustrated with examples from my own small collection.

– Restored a Nestler 23R System Rietz with a Dietzgen all-glass – Faber – Corrected date of first slide rule production from to.

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Slide rule

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.

as one full of puzzles; books, catalogs, and slide rules of. Nestler were offered for a long time without dating, while products of Dennert & Pape.

Home Page. Circular Slide Rules. Pocket Watch Slide Rules. Cylindrical Slide Rules. Mechanical Calculators. Scientific Instruments. Drawing Instruments. Slide Rule Books. British Slide Rules. French Slide Rules. German Slide Rules. American Slide Rules. Japanese Slide Rules.

Slide rule

Post sold a wide variety of slide rules, both under its own name and under the names of various manufacturers. Post itself actually made no slide rules; even those rules that bore the Post brand name were manufactured by others. Until about , Post slide rules were made by a variety of German manufacturers. There was little consistency in catalog numbers until the mid s when ” was assigned to the top-of-the-line inch Mannheim rule.

Albert Nestler Timeline. – Albert Nestler and Theophil Beck establishes factory in Baden, Germany to make slide rules.

Albert Nestler No 20 D. Free shipping. Patent Slide Ruler made in Germany with case. Patent” Deutsche Reich Patent printed in the well. Front Scale. Back Scale.

Dating faber-castell slide rules

There are inch and metric rulers on the edges and tables on the reverse. It has a black card case. Identified as a Nestler No 41 Lilliput slide rule.

The slide rule is used primarily for multiplication and division, and also for von Braun brought two s vintage Nestler slide rules with him when he moved to​.

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

Chemical slide rules

Other Slide Rule dates are currently in development. Assistance in this effort will be appreciated. Please refer to the museum library and individual galleries as this page is being built. Example: St. Louis 12, Missouri.

My smallest slide rule, actually a novelty slide rule but it works just fine and is more accurate Front scale A, B, CI, C & D. Rear scale S,L & T. Made in Occupied Japan date this to – A m long scale straight slide rule by Nestler.

It is filled with unusual items, so you might want to look through it carefully. It includes over different items, hundreds of them first-time entries — plus two specials. Please contact me with questions about prices or anything else. You may refer the items by their number and the October, list designation.

Special 1 Nestler Special: New in case, Nestler Multimath-Duplex rule set, including both the 5 inch and 10 inch versions, the same 28 scales on each. See items numbered and Nestler made some very nice rules. These would be great for personal use, collection, or as a gift. Special 2 Free bonus rule s with your order of any two or more items from this list of over items.

Basic slide rule theory and use (Part 3): Square and Cube scales A, B, & K


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