Today planes rely on very different technologies but the rule is still useful whenever you want to do operations without having to type. 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. Using a slide rule greatly simplifies operations of multiplication, division, exponentiation, root extraction and calculation of trigonometric and logarithmic functions. In a circular slide rule the engraving is done pm the face of the circle with the scale arrayed along a diameter with the indices coinciding and the engraving radial. The circular slide rule sputnik made by kalibr factory in moscow was released ca. Just line up the two numbers to get quickly tabs on all their multiples. Most students learned slide rule use on the linear slide rules, and did not find reason to switch. Make offer very rare antique ross precision computer circular spiral slide rule 1920. 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. This one features a logarithmic scale for multiplication that makes five turns around the rule. This is the second of three possible backgrounds for the circular slide rule. Align the inner and outer rules and find on the circle all the multiples. Datalizer wheel chart calculators are designed for quick calculating. Theres a good selection at the international slide rule museum website, including an ingenious circular rule using a cd case by ying hum, see below.
An historical introduction to slide rules from the museum of hp calculators. Spheres slide rule universe is a repository for information, pictures, history and links to sellers, other sites and experts, and an online store. The ones, which still exist, will eventually deteriorate with time. Radiation dosimetric nuclear circular slide rule rl. Media in category circular slide rules the following 54 files are in this category, out of 54 total. One slide rule remaining in daily use around the world is the e6b.
Get started with any of our readytouse laser cutting design templates and customize it to fit your needs, whether its electronics enclosures, faceplates, or anything in between. Delamain constructed the first circular slide rule. The appeal of slide rules for use and as collectables. Again, id recommend printing them on the front and back of the same piece of paper, just like they would come with a sterling slide rule. 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. Overview of the major categories of slide rules, and descriptions of common scale labels and meanings. A d scale will be engraved on the face at the outside diameter and the c scale along the inside. Here is the first of three templates for circular slide rule backgrounds. This program replicates the most common types of slide rules. Turn lc sc will follow, keeping the angle until sc is over 3. Scales c and d, multiplication and division duration. Can i translate your page slide rule calculations by example on slide rules to the italian language, with your permission.
Fivescale circular with slide out panel containing a wealth of useful conversion tables and data. With the aid of scales printed on the frame it also helps with such. Circular slide rule watch tutorial my quick guide and tutorial explaining how to use a circular slide rule flight watch my seiko flight master. You can see the gilson cursor mechanism and the two cursors arranged in the 4 oclock position. One of the nice things about circular slide rules is that youll. There are also a number of other sites where manuals for download may be found, please look at. Circular slide rule article about circular slide rule by. For example, a 10 cm circular would have a maximum precision approximately equal to a 31. Different types of slide rules were widely used until the early eighties. With this circular slide rule, inverse proportion should always be done between d and cl. Once all the pilots had a rule of this kind on the clock, knowing how to do multiplication and division quickly could save your life. Newer circular slide rules for the sake of completeness i list some additional literature references to newer circular slide rules. 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. The link below will take you to dereks virtual slide rule site.
This page gives my own templates see below for constructing a circular. The radiological tables and circular slide rule were compiled and designed to provide a compact calculator and reference source to aid the radiologist or radiation therapist in his or her daily duties. The disposition of the scales on the slide rules rotatable discs is such that their interrelationship can be easily comprehended by a beginner in arithmetic. Slide the c scale so that the 1 or 10 is over on the d scale. Each just needs to be cutout and placed onto a cd case. Datalizer converts information into interactive, infographic products that bridge the timedata gap. Dereks virtual slide rule gallery a gallery of clickable simulated slide rules. Sophisticated models have more scales than my simple circular slide rule, making for greater flexibility. Instruction booklet that came with the conray radiological tables and circular slide rule. He never tried it, but we thought about making paper slide rules of some sort. Get the best deal for circular slide rule from the largest online selection at. To multiply two numbers and, slide the inside scale so that the 1 on it is over on the outside scale.
Our next project will include a circular slide rule in the design of the watch. Free shipping on many items browse your favorite brands. There are a number of manuals for slide rules here which are available for download. Very useful for travel, just set the exchange rate. World record slide rule, the eximius diu 6 encore consulting. Yes, there is some interesting slide rule software that allows you to demonstrate and experiment with slide rule operation. A standard manual for circular slide rules, direct from concise in the fall, 2002. Leipala with images oughtred society slide rule home page.
A slide rule in a circular form whose advantages over a straight slide rule are its precision, because it is equivalent to a straight slide rule many times longer than the circular slide rule s diameter, and ease of multiplication, because the scale is continuous. Concise circular slide rules concise typee weights and measures, conversion tables and circular slide rule. A slide rule in a circular form whose advantages over a straight slide rule are its precision, because it is equivalent to a straight slide rule many times longer than the circular slide rules diameter, and ease of multiplication, because the scale is continuous. The front base has l and d scales, with c, ci, a, and k scales on a sliding disc that fits inside the base.
As these are quite rare, this is a literature study. Later i thought a circular slide rule would be easier to make out of. The spiral is 750mm diameter about 30, printed on paper, laminated, and stuck onto a circular piece of acrylic perspex. Slide rules usually look like a narrow ruler, but for todays demonstration we will be building a circular slide rule. Slide rules were used for over 400 years for calculating and estimating. 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. Circular slide rule instructions tools and materials.
Circular slide rule calculators wheel chart calculators. Lets get slidin add tip ask question comment download. Faber rule build a slide rule build both a linear and circular rule circular slide rules circular slide rule archives circular slide rule pictures cleaning and caring a useful introduction from sphere research. The single slide rule is designed for beginner, consisting of k, a, b, ci, c and d scales only. Spheres slide rule universe is a repository for information, pictures, history and links to sellers, other sites and. When assembled as on a slide rule we get the workhorse scale pair of the slide rule. To be downloaded, in original size, and printed in 200 dpi. Slide rule a device designed to simplify and speed up work with logarithmic tables. Customers tell us that they know circular slide rule style calculators as. An e6b flight computer commonly used by student pilots.
Ill refer you as original author with link to your page if you want. Teach yourself the slide rule by burns snodgrass a pdf file a pickworth book for the a. Slide rule scales build your own sr slide rule museum. The top picture shows the setting for the multiplier 8 in the sum 8 x 6. Sphere researchs slide rule universe, build your own. Sphere researchs slide rule universe, build your own slide rules. The first circular slide rule on this link uses a cd case as the basis for the slide rule. Both shareware and freeware licensed programs are offered here. Using a slide rule is a bit of a lost art but with a bit of practice, it can be a useful everyday tool.
After seeing phil bs making your own slide rule, i went on a huge slide rule kick. Also, the sliding member in such straight slide rules frequently becomes lost. Resources concise 270 circular slide rule smithsonian. Unlike earlier versions of my circular slide rule, i put it far enough towards the outside that i could graduate it for a 20 inch rule instead of as for a 10 inch rule. They were finally abandoned with the advent of handheld calculators, computers and smart phones. Computing instruments halden calculex circular slide rule.
Slide charts slide rule calculators bookfold slide guides wheel charts data dials trapped dial volvelles. This circular slide rule comes with its original leather wallet and the 95 page soft leather back instruction manual, which also contains numerous rules, tables, and formulae to facilitate the use of this particular slide rule. Make your own circular slide rule to be downloaded, in ori flickr. How to use the atlas circular slide rule spiral type. After a buying or making a slide rule, if the original manual isnt available online many are, theres a superb illustrated tutorial on slide rule use pdf download offered on the oughtred. Slide rule universe take the learn to use and clean them link. I did a lot of research on them, and when i did, i discovered that there are circular variations. Relax, you dont have to load any to actually run your slide rule, these are training and experimentation aids. To download a zip version for apple macintosh and linux systems. A large number of templates for circular slide rules are given, along with many other templates. This software tries to replicate the slide ruler which was so popular way back than. Slide rule for windows is a revolutionary new software it is a single sided slide ruler for windows 3. The ubiquitous small kl1 watch produced by second watch factory in moscow was introduced in 1965 14.
Collection of slide rule replicas slide rules are not manufactured any more. Ron manleys slide rule site take the instructions link. How to use a circular slide rule caliper timepieces inc. A slide rule adds the logarithms of two numbers to multiply them. Scales to make a circular slide rule using a cd case by ying hum va3yh canada there are 2 circular slide rule options shown.
How many days will it take for 8 men to finish the job. There are also a couple of slider calculaters from brian and myself. Apr 02, 2014 once all the pilots had a rule of this kind on the clock, knowing how to do multiplication and division quickly could save your life. The basic advantage of a circular slide rule is that the widest dimension of the tool was reduced by a factor of about 3 i. Postscript printer 600 dpi or better with transparency stock scissors a sharp hobby knife or pocket knife thin cardboard the back of an old writing tablet will do white glue and rubber cement if possible. Concise 270 circular slide rule description this pocketsized white plastic duplex circular slide rule has a clear plastic indicator that folds over the edge to serve both sides.
Circular slide rule based on my guess concerning nystroms calculator design. 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. Updated november 3, 2001 types of slide rules and their scales. Their elegant simplicity is still a thing of wonderment. I particularly like the simulation of the pickett n 525es, a statistical slide rule and one that is uncommon. The first manufacturing company opened in 1893 producing tsquares, wooden triangles, drawing boards, hectograph inks, surveying instruments, blue print and van dyke papers, dietzgens historic line of engineering products. Here derek has put together a number of working slide rules that can be used for calculations and demonstrations on the computer. Making an oddball circular slide rule practical machinist. Conray radiological tables and circular slide rule. This site hosts a portable package of derek ross, stefan vorkoetters, and brian bartholomews virtual slide rules browserhosted slide rule simulators. Get the best deals on circular slide rule when you shop the largest online selection at.
Here you will find a collection of some of the most prominent models carefully handcrafted and simulated or emulated in javascript. Dozens of scales are included and numerous features that could never exist on a physical slide rule are also included, such as color options, numeric displays of the values under the hairlines, and so on. Keeping it up with my math helping tools and after i finished my straight cardboard slide rule, i decided to make another slide rule but of much easier and fast construction. This is a circular slide rule first created in the 1930s for aircraft pilots to help with dead reckoning. This american slide rule manufacturer was founded in 1885 by eugene dietzgen. Sphere researchs slide rule universe, build your own slide. Slide charts, wheel charts, slide rule calculators datalizer. Slide rule software sphere researchs slide rule universe. Unfortunately because of the screen resolution, numbers are displayed digitally.
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