The hash mark under the 1 on the left side of the slide is known as the left index. Question looking for sliderule watches any recommendations. In a separate calculation you find the order of magnitude by combining the powers of 10. This page gives my own templates see below for constructing a circular slide rule, with scales c, ci, d, a, and k. And the slide rule has become an electronic calculator. A slide rule, also known as a slide ruler or a slipstick, is an extremely complex ruler that functions as an analog computer. Overview of the major categories of slide rules, and descriptions of common scale labels and meanings. The fist section shows how to make a simple rule, and suggestions for all the mechanical steps.
Although some overseas companies continue to make slide rules and retailers like think geek offer replica models, these are often sold for. Multiplying with the slide rule suppose you want to multiply 2x4. You can combine this slide rule with eight photocopied pages from h. Some of the special scales described in this manual may not be available on your slide rule.
Mathematical foundations of the slide rule with ack corrected. The pdf file for this slide rule has some problems that make it unfit for anything but practice by a beginner. It is the pocket version of the post versalog 1460 10 inch rule. The first circular slide rule on this link uses a cd case as the basis for the slide rule. Spheres slide rule universe is a repository for information, pictures. An easy introduction to the slide rule internet archive. Pdf file to generate the scales on a sheet of paper. The purpose of these additional scales is to make multiplication and division fast.
Line up the 1 on the left hand side of sliding scale c with 2 on frame scale d. I typed and scanned this in from one of the manuals that came with my n4es slide rule. The pdf files are to scale so just be careful in cutting the center hole. 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. The slide rule and other instruments which give the same facilities for rapid calculations, are covered by the term mechanical calculation. 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.
A slide rule is a mechanical device that uses the alignment of numeric values marked on sliding scales to perform mathematical calculations. You can also check out my circular and combination slide rules page for some examples. The operation of a slide rule is simple and anyone with a fair understanding of numbers can use one. The only maker that still produces classic slide rules is the japanese maker concise. These scales represent various functions, and by moving the slide relative to the body, a calculation involving multiple functions can be performed, with the indicator allowing. It is unfortunate that, for some reasons not easy to see, the slide rule is sometimes regarded as a difficult instrument with which to. On the body and slide are scales that are parallel to each other.
One fascinating thing about slide rule is the parallels and examples that one can draw to the fiction mr. Here is a virtual slide rule which works in your browser. The cursor travels the full length of the body, and the hairline crosses these scales for direct comparison. The link below will take you to dereks virtual slide rule site. He explains what a slide rule is and how you can build one of your very own.
The pocket protector has been replaced by a cell phone holster. Scientific american may 2006 university of vermont. Collecting slide rules oughtred society slide rule home page. Im happened to meet your website when i searched slide rule. But, when you look at the 5 on the b scale, it is at least the width of a line off of the 1 or 10 on the a scale. Another example of a simple slide rule would be the e6b flight computer. Reading the slide rule scales ia the decimal point d. They have a standardised set of markings called scales.
Here derek has put together a number of working slide rules that can be used for calculations and demonstrations on the computer. This is a kingson four rule combination pocket sliderule with an addiator type calculator on the other side it is featured here to illustrate a simple, small, pocket, slide rule. Slide rule was published in 1954 and represented nevil shutes selected remembrances from childhood to 1938. In addition are a few manuals i have written for my own jugglers and radix series slide rules. Ive been lurking in here for quite a while now and wanted to get myself a first real watch. The slide rule explorer sre lets you explore more than 100,000 mathematical expressions that can be evaluated on a slide rule. Click here to see a similarly organized pdf file of several hundred pages. The slide rule also does not tell you the sign of your result. Apparently this slide rule was made when the new math was at its zenith and faber. The international meeting of slide rule and other math. A computer who must make many difficult calculations usually has a book of tables of the. The scales are also continuous, so there is no need to make adjustments, such as folded and inverse scales, for results of calculations that go off the ends. It is these companies into which the fund will invest.
The finncap solution is an internallydeveloped investment analysis tool, the slide rule, to dramatically simplify the identification of the best companies. Nate, the mathematics guy shows you the basics of a slide rule. Scientific american 81 t wo generations ago a standard uniform identi. By sliding various components of the ruler to align with each other, a slide rule can compute products, roots, logarithms, and the result of trigonometric functions.
Npr ed before the smartphone, the laptop and the pocket calculator, there was a powerful mechanical computer. These were the largest of their generation, vastly larger than the a380 and 747 jets of today. Next, find the smaller number on the d scale and slide the c scale so the 1 on the far left lines up with the smaller number. 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. This is about as useless for slide rule calculations as a list of large mammals. New listing vintage pickett model 1010t trig slide rule ruler w leather case. The proper place to become acquainted with this invaluable timesaver is in the classrooms of the primary schools. Slide rules circular slide rules national museum of american.
Tape overlapping cursor ends on back simple paper slide rule by. Mannheim slide rule 1850 faber castell 283n nestler 23r mannheim issac newton put 3 scales in parallel in 1675 to compute cubes. The 1748p also has a reversible slide with s, l and t scales on its reverse, inch and metric rulers along the top and bottom edges of the stator, and a printed conversion table affixed to the. Sphere researchs slide rule universe, build your own. The dietzgen 1748p is a compact 8 maniphase slide rule, derived from a traditional mannheim simplex slide rule with the addition of k, c and ci scales. 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. Enter the lha in the proper column and follow the form to make the computation. Scales to make a circular slide rule using a cd case by ying hum.
There is no way of indicating the position of the d. Background on logarithms, history of the slide rule, and how it all works. To build the slide rule, you will need to download and print the following image at 300 dpi. The slide rule, or slipstick, is a mechanical analog computer. Some of them relate to standard rules thornton, faber castell 283n and would be useful whatever rule you have but others are for specialised rules. On the reverse side of the slide, the s, l, and t scales appear, and the slide may be re. Your dualbase log log slide rule is a powerful modern design that has many features. We would, with all respect, urge members of the teaching profession to make more effective efforts to introduce the slide rule into schools. How to build yourself a slide rule math wonderhowto. Updated november 3, 2001 types of slide rules and their scales. Compared to a calculator, a slide rule is severely limited in its accuracy.
The international slide rule museum has a multitude of resources for slide rule fans, including scans of user manuals from a variety of manufacturers. Simple paper slide rule michael gasperi 2012 fold fold cut cut cut 1. Simpson departmentof physical sciences and engineering princegeorges communitycollege november 29, 2010 1 introduction before electronic calculators became widely available ar ound 1975, students, engineers, and scientistsperformed mathematical calculations using an instrument called a sliderule. Slide rule very widely used, mainly for scientific calculations, before electronic calculators became cheap.
Erics where to buy slide rules page erics slide rule site. The slide rule, also known as a slipstick, is a mechanical analog computer. The a, d, and k scales are on the body, the b, and c scales on the slide. I particularly like the simulation of the pickett n 525es, a statistical slide rule and one that is uncommon. The shirt and tie evolved into a tshirt sporting some software advertisement. You can enter and read a number typically to two or three decimal digits only. To do a calculation with a slide rule you reduce all numbers to scientific notation with 24 digits then use the slide rule to perform the basic operations. My slide rules this gallery is in the process of some updating, as many of the scans are from the 1990s, when my way of taking pictures was to put the slide rule on a flatbed scanner and hope it came out reasonably clearly. Collecting slide rules oughtred society slide rule home. Here are two videos with regrettable autofocus hunting explaining the basics of computation with a slide rule.
All other scales on a slide rule are referenced to the c and d scales. Parts of the slide rule the slide rule is made up of three parts. Body slide cursor there are scales of various sorts, labelled with alphabet letters along the left, together with a short description of what the scale does on the right. Since i found this subreddit ive been on the lookout for watches everywhere and found an old navitimer in the basement, which ive been wearing virtually nonstop. Here are a few instruction manuals for aw faber faber castell slide rules that i have acquired, most came with slide rules as indicated. Bissaker slide rule 1654 circular slide rule king pocket calculator 66 sclales thacher calculator 30 ft. To use a slide rule to multiply 2 numbers together, move the decimal points for each number you are multiplying so they fall between the values of 1 and 10. Slide rule universe take the learn to use and clean them link.
The slide rule the slide rule is a time and labor saving instrument for quickly solving problems involving multiplication, division, proportion, squares, square roots, cube and cube roots or any combination of these processes. New listing vintage new in box pickett n500 es hi log speed slide rule 12inch. The oughtred society has a meeting in june in mountain view, california, and a meeting in february in las vegas, nevada. Slide rule simple english wikipedia, the free encyclopedia. I tried your virtual slide rule page, it is very interesting. Displays, an auction, and slide rule talks are the scheduled highlights, plus visiting with other collectors. The site has instruction manuals for a number of slide rules.
For the past 400 years, the calculations performed on slide rules have made possible such feats as designing the first skyscraper and putting a man on the moon. It is an open body duplex type slide rule with scales on both sides of the body and slide, and a single hairline on each side of the cursor. Merger a merger is a combination of two or more firms in which only one firm would survive and the other would cease to exist, its assets liabilities being taken over by the surviving firm. Additionally, the slide rule does not tell you where the decimal point is located in the answer. Multiplying with the slide rule iowa state university. The sterling slide rule has standard a, b, c, c, d, and k scales. Mar 29, 2019 to use a slide rule to multiply 2 numbers together, move the decimal points for each number you are multiplying so they fall between the values of 1 and 10. Thanks to some very publicspirited slide rule experts one in the uk, one in canada, we now can provide some computerized tools that will allow you to build several different types of slide rules. The quick and easy lawrence slide rule instruction book.
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