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. Click here to see a similarly organized pdf file of several hundred pages. Ive been lurking in here for quite a while now and wanted to get myself a first real watch. Ron manleys slide rule site take the instructions link. The pocket protector has been replaced by a cell phone holster. On the reverse side of the slide, the s, l, and t scales appear, and the slide may be re. 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.
The pdf files are to scale so just be careful in cutting the center hole. Reading the slide rule scales ia the decimal point d. 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. 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. 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.
The slide rule explorer users guide by peter alfeld, department of mathematics, university of utah. Enter the lha in the proper column and follow the form to make the computation. This is about as useless for slide rule calculations as a list of large mammals. 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. One fascinating thing about slide rule is the parallels and examples that one can draw to the fiction mr. Bissaker slide rule 1654 circular slide rule king pocket calculator 66 sclales thacher calculator 30 ft. A computer who must make many difficult calculations usually has a book of tables of the. 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. There is no way of indicating the position of the d. Sphere researchs slide rule universe, build your own slide rules.
In a separate calculation you find the order of magnitude by combining the powers of 10. 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. Here are a few instruction manuals for aw faber faber castell slide rules that i have acquired, most came with slide rules as indicated. A slide rule, also known as a slide ruler or a slipstick, is an extremely complex ruler that functions as an analog computer. Some of the special scales described in this manual may not be available on your slide rule.
Youll find more information about their current circular slide rule offerings at their website. Your dualbase log log slide rule is a powerful modern design that has many features. Here is a virtual slide rule which works in your browser. The slide rule explorer sre lets you explore more than 100,000 mathematical expressions that can be evaluated on a slide rule. The first circular slide rule on this link uses a cd case as the basis for the slide rule. Line up the 1 on the left hand side of sliding scale c with 2 on frame scale d. 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. 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. How to build yourself a slide rule math wonderhowto. 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. New listing vintage new in box pickett n500 es hi log speed slide rule 12inch.
Slide rule simple english wikipedia, the free encyclopedia. The site has instruction manuals for a number of slide rules. 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. An easy introduction to the slide rule internet archive. This page gives my own templates see below for constructing a circular slide rule, with scales c, ci, d, a, and k. The hash mark under the 1 on the left side of the slide is known as the left index. The purpose of these additional scales is to make multiplication and division fast. Scientific american may 2006 university of vermont. Collecting slide rules oughtred society slide rule home. All other scales on a slide rule are referenced to the c and d scales. It is the pocket version of the post versalog 1460 10 inch rule. 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 there are many different styles of slide rules. Additionally, the slide rule does not tell you where the decimal point is located in the answer. 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.
The slide rule, or slipstick, is a mechanical analog computer. The sterling slide rule has standard a, b, c, c, d, and k scales. Mannheim slide rule 1850 faber castell 283n nestler 23r mannheim issac newton put 3 scales in parallel in 1675 to compute cubes. Although some overseas companies continue to make slide rules and retailers like think geek offer replica models, these are often sold for. The only maker that still produces classic slide rules is the japanese maker concise. A slide rule is a mechanical device that uses the alignment of numeric values marked on sliding scales to perform mathematical calculations. The slide rule also does not tell you the sign of your result. These were the largest of their generation, vastly larger than the a380 and 747 jets of today. The quick and easy lawrence slide rule instruction book.
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. The fist section shows how to make a simple rule, and suggestions for all the mechanical steps. Simple paper slide rule michael gasperi 2012 fold fold cut cut cut 1. 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. Here derek has put together a number of working slide rules that can be used for calculations and demonstrations on the computer.
In addition are a few manuals i have written for my own jugglers and radix series slide rules. Slide rule universe take the learn to use and clean them link. The slide rule, also known as a slipstick, is a mechanical analog computer. New listing vintage pickett model 1010t trig slide rule ruler w leather case. 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. You can enter and read a number typically to two or three decimal digits only. Slide rules circular slide rules national museum of american. Background on logarithms, history of the slide rule, and how it all works. The shirt and tie evolved into a tshirt sporting some software advertisement. Erics where to buy slide rules page erics slide rule site. 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.
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. They have a standardised set of markings called scales. The operation of a slide rule is simple and anyone with a fair understanding of numbers can use one. It is unfortunate that, for some reasons not easy to see, the slide rule is sometimes regarded as a difficult instrument with which to. Apparently this slide rule was made when the new math was at its zenith and faber. Displays, an auction, and slide rule talks are the scheduled highlights, plus visiting with other collectors. We would, with all respect, urge members of the teaching profession to make more effective efforts to introduce the slide rule into schools. Parts of the slide rule the slide rule is made up of three parts. Nate, the mathematics guy shows you the basics of a slide rule. The international slide rule museum has a multitude of resources for slide rule fans, including scans of user manuals from a variety of manufacturers.
I typed and scanned this in from one of the manuals that came with my n4es slide rule. Scales to make a circular slide rule using a cd case by ying hum. Slide rule very widely used, mainly for scientific calculations, before electronic calculators became cheap. Mathematical foundations of the slide rule with ack corrected. He explains what a slide rule is and how you can build one of your very own. Additional slide rule material can be accessed using the links in the left bar under slide rule content pages.
The cursor travels the full length of the body, and the hairline crosses these scales for direct comparison. Slide rule is an autobiography, but the part that almost everyone will buy it for is the account of the building of the r100 airship in competition with the r101. I particularly like the simulation of the pickett n 525es, a statistical slide rule and one that is uncommon. 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. I tried your virtual slide rule page, it is very interesting. The proper place to become acquainted with this invaluable timesaver is in the classrooms of the primary schools. Spheres slide rule universe is a repository for information, pictures.
Multiplying with the slide rule suppose you want to multiply 2x4. 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. Sphere researchs slide rule universe, build your own. To build the slide rule, you will need to download and print the following image at 300 dpi. The finncap solution is an internallydeveloped investment analysis tool, the slide rule, to dramatically simplify the identification of the best companies.
The pdf file for this slide rule has some problems that make it unfit for anything but practice by a beginner. And the slide rule has become an electronic calculator. The link below will take you to dereks virtual slide rule site. 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. Multiplying with the slide rule iowa state university. The a, d, and k scales are on the body, the b, and c scales on the slide. 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. 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. You can combine this slide rule with eight photocopied pages from h. Tape overlapping cursor ends on back simple paper slide rule by. On the body and slide are scales that are parallel to each other.
Scientific american 81 t wo generations ago a standard uniform identi. 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 oughtred society has a meeting in june in mountain view, california, and a meeting in february in las vegas, nevada. Compared to a calculator, a slide rule is severely limited in its accuracy. Im happened to meet your website when i searched slide rule. The slide rule and other instruments which give the same facilities for rapid calculations, are covered by the term mechanical calculation. Here are two videos with regrettable autofocus hunting explaining the basics of computation with a slide rule. You can also check out my circular and combination slide rules page for some examples. Question looking for sliderule watches any recommendations. Npr ed before the smartphone, the laptop and the pocket calculator, there was a powerful mechanical computer. Collecting slide rules oughtred society slide rule home page. Overview of the major categories of slide rules, and descriptions of common scale labels and meanings.
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