My collection of circular and combination slide rule devices. Concise slide rules and rebranded variants this gallery is focused on the varieties of concise circular slide rules and the many variants of promotional specimens. Still made today as a cardboard slide chart by several companies. Circular slide rule based on my guess concerning nystroms calculator design. To someone who doesnt know how to use it, a slide rule looks like a ruler designed by picasso. Most students learned slide rule use on the linear slide rules, and never found reasons to switch. Nice surprise with the slide show with slide rules that actually work. With the introduction of this device every engineer sold their souls to the. Rule has operating instructions on the face, and was a low cost and popular rule widely used in retail. The slide rule and other instruments which give the same facilities for rapid calculations, are covered by the term mechanical calculation. The most familiar form is the linear slide rule, but there were also circular ones like the univacs as. Vintage 1942 abrams photogrammetric computer circular slide rule ww2. On this page are links to a number of software simulations of slide rules, mechanical.
If both the outside and inside circular rules have identical scales with a full range from 10 to 90, then you have what are known as. Scientific american may 2006 university of vermont. Our next project will include a circular slide rule in the design of the watch. It can be used to perform addition, subtraction, multiplication, division, and with more difficulty square roots and other operations. Henry suttons slide rule top was an early circular rule circa 1663. Except, the jeppeson e6b flight computers are shown on the back side. Jul 05, 2019 this circular slide rule was included in samuel glasstone and philip j. This circular slide rule was used to calculate the most efficient code for the univac ii. Etsy is the home to thousands of handmade, vintage, and oneofakind products and gifts related to your search.
Konsaisu of tokyo, japan, and is the only manufacturer still producing and marketing new slide rules that have the classic scales. Picketts popular plastic commercial circular slide rule, with markup and discount functions. The slide rule, also known colloquially in the united states as a slipstick, is a mechanical analog computer. I did a lot of research on them, and when i did, i discovered that there are circular variations. After seeing phil bs making your own slide rule, i went on a huge slide rule kick. Get the best deals on circular slide rule when you shop the largest online. Fowlers longscale calculator vest pocket modelrx for engineers, draughtsman and science students supplied complete in leather case fowlers calculators, like all slide rules, are based on the properties of logarithms, which enable multiplication to be performed by addition and division by subtraction. Slide rule scales build your own sr slide rule museum. Concise ctcs 552 slide rule circular takeda in sleeve dow. It is unfortunate that, for some reasons not easy to see, the slide rule is sometimes regarded as a difficult instrument with which to become proficient. Tim has provided a free downloadable software emulation of the sliderule. The slide rule is used mainly for multiplication and division, and also for scientific functions such as roots, logarithms and trigonometry, but usually not for addition or subtraction. Mannheim slide rule 1850 faber castell 283n nestler 23r mannheim issac newton put 3 scales in parallel in 1675 to compute cubes, and proposed the cursor in 1677, but was ignored.
Get the best deal for circular slide rule from the largest online selection at. By the late 1800s, generalpurpose slide rules had become a common tool for engineers. Datalizer wheel chart calculators are designed for quick calculating. Im an engineer, learned the slide rule in high school, moved on to programmable calculators and computers later. Make offer very rare antique ross precision computer circular spiral slide rule. German slide rules american slide rules japanese slide rules world slide rules blundell british thornton fearns and mears unique aristo fabercastell nestler hemmi relayricoh dietzgen keuffel and esser pickett and eckel slide charts electronics. 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. Free shipping on many items browse your favorite brands. Overview of the major categories of slide rules, and descriptions of common scale labels and meanings. The appeal of slide rules for use and as collectables. Fowlers magnum long scale calculator made in england circular slide rule. Slide rule universe take the learn to use and clean them link.
The first circular slide rule on this link uses a cd case as the basis for the slide rule. How to use a circular slide rule caliper timepieces inc. I have used this software to build demonstration sliderules for papers that i have prepared for the international meetings and can highly recommend it. Bissaker slide rule 1654 circular slide rule king pocket calculator 66 sclales thacher calculator 30 ft. The slide rule, or slipstick, is a mechanical analog computer. This set is unused and immaculate the box is a little worn. There are at least three different scales, and on most of them the numbers arent even spaced evenly apart. Picketts most popular aluminum circular slide rule, with decimal to fraction conversions and additional scales on rear face. The lower picure shows the answer on the leftmost cursor. Slide rule circle russian round logarithmic engineer circular plastic ussr red. Home page abaci addiators circular slide rules pocket watch slide rules cylindrical slide rules mechanical calculators scientific instruments drawing instruments. The slide rule is a simple but elegant mechanical calculator. Updated november 3, 2001 types of slide rules and their scales. This page gives my own templates see below for constructing a circular.
With the aid of scales printed on the frame it also helps with such miscellaneous tasks as converting time, distance, speed, and temperature values, compass errors, and. Customers tell us that they know circular slide rule style calculators as. Unfortunately because of the screen resolution, numbers are displayed digitally. One slide rule remaining in daily use around the world is the e6b. Curta mechanical calculator, a small, handcranked mechanical calculator introduced by curt herzstark in 1948. My father, being an engineer, used slide rules and taught me how to use one when i was about 12. The e6b flight computer, nicknamed the whiz wheel or prayer wheel, is a form of circular slide rule used in aviation and one of the very few analog calculating devices in widespread citation needed use in the 21st century. Slide rule circle russian round logarithmic kl1 engineer circular logarithmic 2. Circular slide rule calculators wheel chart volvelles. Circular and combination slide rule devices erics slide. There are also a number of other sites where manuals for download may be found, please look at. Slide rule ruler calculator professor jr computers software instruments rain. Get the best deals on circular slide rule when you shop the.
Detail of the scales for the chemical engineer or chemist on the hemmi 257. A practiced user with a good quality slide rule can multiply, divide, exponentiate, take logarithms and perform trigonometric operations to three significant figures more quickly than with an electronic calculator. Ron manleys slide rule site take the instructions link. One of the nice things about circular slide rules is that youll. Fivescale circular with slide out panel containing a wealth of useful conversion tables and data. The last slide rule manufactured in the united states was produced on july.
Sold by nash enterprise and ships from amazon fulfillment. Using a slide rule is a bit of a lost art but with a bit of practice, it can be a useful everyday tool. Takeda concise 300 circular slide rule diameter 412, c scale length 10 made in japan this concise circular slide rule has the standard 10 scales arranged on a doublesided plastic disc of about 5 diameter. Get the best deals on circular slide rule when you shop the largest online selection at. See more ideas about slide rule, old computers and mechanical calculator. No matter what youre looking for or where you are in the world, our global marketplace of sellers can help you find unique and affordable options.
The advantage of circular slide rules, is that the dimensions can be small. Computer programming was just one of many uses for the slide rule, which had. Circular slide rule calculators wheel chart calculators. As graphical analog calculators, slide rules are closely related to nomograms, but the former are used for general calculations, whereas the latter are used for applicationspecific computations. A large number of templates for circular slide rules are given, along with many other templates. I worked at eastman kodak for 30 years as a software engineer specializing in realtime microprocessor projects, retiring in early 2006. Slide rule for windows is a revolutionary new software it is a single sided slide ruler for windows 3.
The e6b flight computer, nicknamed the whiz wheel or prayer wheel, is a form of circular slide rule used in aviation and one of the very few analog calculating devices in widespread use in the 21st century. Sophisticated models have more scales than my simple circular slide rule, making for greater flexibility. I worked at eastman kodak for 30 years as a software engineer specializing in realtime. Spheres pickett slide rule company archive slide rules. Dolans popular childrens book, the effects of nuclear weapons. An historical introduction to slide rules from the museum of hp calculators. The classic form of the slide rule was due to the 19thcentury french engineer mannheim. Most students learned slide rule use on the linear slide rules, and did not find reason to switch. This software tries to replicate the slide ruler which was so popular way back than. The smallest is a slide rule tie clasp that is about two inches long. Concise circular slide rules concise typee weights and measures, conversion tables and circular slide rule. While their inner scales lack precision, an advantage of a circular slide run is that you never have to move the center slide back to the other end when you exceed the scale on one end.
Concise slide rules international slide rule museum. If both the outside and inside circular rules have identical scales with a full range from 10 to 90, then you have what are known as c and d log scales. Ww2 era army air force flight computer model d4 circular slide rule aviation math cruver mfg co by robshobbies on. Dolans popular childrens book, the effects of nuclear weapons, which along with classics like hersheys hiroshima. An e6b flight computer commonly used by student pilots. Slide rule simple english wikipedia, the free encyclopedia. Generally, they are either have a linear form or that of a circle.
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. Pandahall elite 1pc acrylic slide rule punching positioning calculation ruler stencil template for leather craft making, 117x86x2mm, hole. Here is a list of the slide rules currently in my collection. This is a powerful lightweight pocket rule, with performance equal to a much larger straight rule. Its usage is identical to that of a real slide rule, but tim has introduced two major enhancements. Background on logarithms, history of the slide rule, and how it all works. A gift from a retired engineer, this marks my first cylindrical rule, also known as a tubular or helical slide rule. The top picture shows the setting for the multiplier 8 in the sum 8 x 6. The construction is bamboo, a wonderfully stable, mildly lubricious material. A stiff paper slide rule made from the template in cliff stolls scientific american article. I used it every day for trig functions, logs, regular calculations, etc. This circular slide rule was included in samuel glasstone and philip j.
Scales to make a circular slide rule using a cd case. I still have a nice sunn hemmi 80k electro slide rule, but it is a collectible item, not something i use. There were many different kinds of slide rules, adapted to specialized calculations, but the mannheim slide rule was a generalpurpose instrument for scientific and engineering calculations. Slide rule was invented by english minister william oughtred in 1622. This slide rule is a genuine classic and deservedly so, with one of the best scale layouts ever devised for professional technical work. Trane td1 ductulator with sleeve, duct sizing calculator.
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