Actually, ive never used a sliderule even once in my life. The purpose of this particular and quite idiosyncratic slide rule page is to describe. The slide rule, or slipstick, is a mechanical analog computer. 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. Generally, the velocity should be no more than 700 fpm. 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. Includes scales for friction loss per unit length, air volume, air velocity, round duct diameter, and rectangular duct diameters. This is a simple basic calculator with memory functions similar to a small handheld calculator. A modern development was the slide rule, developed around in the 1620s by edmund gunter in the united kingdom.
This side of your computer simply consists of a rotating disk with numbers on the middle scale, which when set against similar numbers on the fixed portion outer scale, allows you to solve problems of time, speed, and distance, calculate. There was a gigantic wooden sliderule on the wall of my algebra classroom in 9th grade. Feb 18, 2007 nate the mathematics guy explains what a slide rule is and how you can build one of your very own. Pilots are required to be proficient on the e6b slide rule. You can use these to create any length of slide rule mike.
Im no professional, but im 90% sure the answer key is wrong for. Weld setting calculators mig, fluxcored, stick, tig. Real thacher envelopes were made of steel bars welded to brass end rings. Many control valve manufacturers provide slide rules and nomographs to be used for valve sizing. The e6b circular rule scales are used internationally for safe manual calculation of air time, distance, speed, temperature, compass errors, and fuel consumption. I compare the decilon slide rule to the hp35 calculator. 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 duplex slide rule had scales on both sides, the usual case for engineering slide rules. It is used primarily for multiplication and division, and also. Browse suggested weld parameter settings for stick welding, tig welding, mig solidwire welding and mig fluxcore welding. Enter information including type of fuel, pressure source, pipe type and size, and run length and load to calculate the pressure at the start and end of the run. Located on the slide, most calculations are done in conjunction with the fundamental cd scales.
This is the slide rule that went to the moon well, not this actual one, presumably. All slide rules consist of logarithmic scales that can be moved in relation to each other in order to do basic mathematical calculations. Museum of hp calculators slide rule page a very cool page with all sorts of explanations of how sliderules work and pictures of various types, including circular and cylindrical. The calculator compares the source field to the attenuated field in gauss, for both dc and 60hz ac fields, and has a scale that covers most common requirements and applications weve seen over past decades. It contains four different types of slide rules and a tutorial for each. Vintage diwa 6inch slide rule, made in denmark, imprinted. History of the slide rule the museum of hp calculators. Etsy is the home to thousands of handmade, vintage, and oneofakind products and gifts related to your search. The simplest slide rule would have two log scales that you could use to do multiplication and division see my slide rule introduction page for more info.
They were for tying the far end to your thigh so it didnt flop around. Overview of the major categories of slide rules, and descriptions of common scale labels and meanings. This was a great starter rule, made in a low cost format by pickett for schools. Slide rule style calculators from datalizer datalizer slide charts. The slide rule eased the addition of the two logarithmic displacements of the numbers, thus assisting with multiplication and division in calculations. The ductulator duct sizing calculator is a hand held rotating calculator used for sizing supply and return duct systems using the equal friction design method. But what ha ppened exactly at this turning point in the history of calculating. The scales on a slide rule are logarithmic, in that the spacing between divisions the lines on the scale become closer together as the value increases. The cursor appeared on the earliest circular models but appeared much later on straight versions. Proper attic ventilation consists of a balance between air intake at your eaves, soffits or fascias and air exhaust at or near your roof ridge. From your photo, i do not think this was a speed calculator. Slide rule definition of slide rule by merriamwebster. Enter your dimensions into the boxes and change to the metric system if you need to.
The bars, which were really open vs, were stuffed with fabric bats. Compared to a calculator, a slide rule is severely limited in its accuracy. Oncalc calculator simple calculator online caculators. Deletebackspace deletes one character at a time from the right end of the display.
Engraved white or yellow plastic construction, black scales. 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. How to use the slide rule international slide rule museum. A calcular too only gives approximate answers, but usually 8 or more significant figures.
Spheres pickett slide rule company archive slide rules. The use of a hydraulic slide rule was still a useful tool even after the invention of the scientific calculator, you may be wondering why. 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. This calculator started the demise of the slide rule industry.
Slide rule simple english wikipedia, the free encyclopedia. Watch the short tutorial video below for stepbystep instructions on how to use the aql calculator. Square and square root are performed with the a and b scales. Before computers or even electronic calculators, engineers had slide rules. Davids calculating sticks, my collection of slide rules. Sand, gravel and crushed stone sliderule calculator. This is why the slide rule is able to do multiplication and division rather than addition and subtraction. Slide rule gazette issues 11 and 12 published by the united kingdom slide rule circle uksrc. In 1950, post brought out an american version of the bamboo slide rule manufactured by hemmi of japan, the versalog. All other scales on a slide rule are referenced to the c and d scales. Shock and vibration calculator slide rule by shock tech. They are simpler to use than conventional slide rules, more convenient than electronic calculators and less expensive than computers and smart phones.
It is enhanced with precision digital read outs for each scale vs. It is a very good example on how the divisions of the slide rule scales are calculated. A patent print poster of an engineers slide rule invented by leon walter rosenthal. You can enter and read a number typically to two or three decimal digits only. Without the great calculator race of the 1970s, there would. Yet another virtual slide rule explanation gallery index back to antiquark copyright 2005 derek ross. To build the slide rule you will need to download and print the following image at 300 dpi. You can afford to put one in the hands of everyone who buys what you sell. The slide rule was used for over 400 years as a calculatingestimation tool. 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. Otis kings calculator is a cylindrical slide rule which has two adjustable logarithmic scales on the central cores, and a sliding cursor on the outer sleeve. Some slide rules duplex models have scales on both sides of the rule and slide strip, others. Illustrated selfguided course on international slide rule.
This is a kingson four rule combination pocket slide rule with an addiator type calculator on the other side. I got a different answer on my slide rule and double checked with a calculator, then triple checked the problem on wolfram alpha. The slide rule, also known as a slipstick, is a mechanical analog computer. Can a slide rule be faster than an electronic calculator. Bissaker slide rule 1654 circular slide rule king pocket calculator 66 sclales thacher calculator 30 ft. The first 6 pictures below show the replica envelope vs. Oughtred society slide rule seminar a set of slides in pdf form prepared by the oughtred society, covering the history of slide rules and some basics of their use. Memory and clear functions for this standard calculator are listed below. Anyone needing a memory jogger or is just intrigued how such analogue calculators of the past worked, the international slide rule museum has a richly. 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.
Concrete slide ruler volume computer calculator 100 yard. Learn more about how to use aql for product inspection by downloading our free ebook, the importers guide to managing product quality with aql. Issue 12 contains my first published gazette article entitled thacher accuracy with unique expenditure. There is also a version as a word document which is smaller 2040 kb. Well, it was just simpler especially for those quick estimates and i still know a few fire sprinkler engineers which still rely on their trusted slide rule to this day. Csst pressure loss calculator sum of pressure loss worksheet. A rather nice example of when the slide rule can give a very much faster solution to a problem than pencil and paper or a calculator is this. Trane td1 ductulator with sleeve, duct sizing calculator. A sliderule calculator is included with each lab kit purchased. Todays students are more likely to have a ti or casio calculator.
As graphical analog calculators, slide rules are closely related to nomograms. A slide rule, also known as a slide ruler or a slipstick, is an extremely complex ruler that functions as an analog computer. Datalizer converts information into interactive, infographic products that bridge the timedata gap. Slide rule definition is a manual device used for calculation that consists in its simple form of a ruler and a movable middle piece which are graduated with similar logarithmic scales. Mannheim slide rule 1850 faber castell 283n nestler 23r mannheim issac newton put 3 scales in parallel in 1675 to compute cubes. Similarly the operations on a calculator or the standard algorithms we teach kids to use on pencil and paper are just as mystifying. Updated november 3, 2001 types of slide rules and their scales. Slide rule style calculators are standard reference tools for many industries. Npr ed before the smartphone, the laptop and the pocket calculator, there was a. Otis kings cylindrical slide rule, sn 63 dimensions. The following was written in 1999 by jason waskiewicz.
Users browsing for collectible slide rules in slide rules usually look at. Slide rule pico sliding calculator on the app store. The slide rule, also known as a slipstick,is a mechanical analog computer. Whether using a friction chart or duct calculator, always check the velocity on the friction chart or duct calculator. Slide charts, wheel charts, slide rule calculators datalizer. Slide rule very widely used, mainly for scientific calculations, before electronic calculators became cheap. Here you will find a collection of some of the most prominent models carefully handcrafted and simulated or emulated in javascript. High school for me was no slide rules, and no hp6797s allowed which nobody but the north side kids could afford later it was the hp33 and the tis 59 then the 50 and 35 that werent allowed.
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. Collection of slide rule replicas slide rules are not manufactured any more. Now using all the information and the formula above we will find the gauge pressure. An e6b flight computer commonly used by student pilots. Calculate the sum of pressure loss with the tracpipe sum of pressure loss worksheet. There was a time when electronic calculators did not yet exist. The slide rule the book, written by florian cajori, is the standard work on the early history of the slide rule. Generally, they are either have a linear form or that of a circle. Field artillery military slide rule, war department technical manual, tm 6240 1945 this instruction manual is for a special slide rule for use by the military for artillery calculations.
Npr ed before the smartphone, the laptop and the pocket calculator, there was a powerful mechanical computer. They have a standardised set of markings called scales. Pickett heavily advertised the fact that they were the official slide rule supplier to the apollo program, and this model slide rule was apparently carried along on 5 apollo missions. I particularly like the simulation of the pickett n 525es, a statistical slide rule and one that is uncommon. The demise of the slide rule and the advent of its successors every text on slide rules describes in a last paragraph, sadly, that the demise of the slide rule was caused by the advent of the electronic pocket calculator. The scales on the slide rule are feed expressed in thousandths of an inch per revolution of the spindle. Abandoned with the advent of handheld calculators, computers. The darmstadt system was developed at the university of darmstadt in the 1930s. This type of rule is similar to the rietz system in. Concrete volume calculator heres a simple, easy to use concrete volume calculator to figure the amount of cubic yards or cubic meters of concrete you will need for your project. Sep 28, 2015 the features of the nestler darmstadt slide rule are explained.
In 1957, ibm released the first viable alltransistor project, the ibm 608, even if it was housed in numerous cabinets. Mar 02, 2020 the slide rule sword gave way to calculators hanging from your belt loop, and for many engineers that calculator was from hp. It remained the tool of choice for many for the next three hundred years. 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. This is a simple to use concrete volume calculator. Slide charts slide rule calculators bookfold slide guides wheel charts data dials trapped dial volvelles. The slide rule side the term circular slide rule shouldnt be intimidating. Apr 20, 2019 it was the first pocket scientific calculator, and killed the slide rule stonedead, but it wasnt yet a match for the apollo guidance computerit was about 200 times slower.
Circular slide rules and cylindricalspiral slide rules also appeared quickly. The slide rule, also known colloquially in the united states as a slipstick, is a mechanical analog computer. The slide rule made it easier to utilize the log relations by developing a number line on which the displacement of the numbers were proportional to their logs. Deep thought writes texas instruments, already infamous thanks to the signing key controversy last year, is trying a new trick to lock down its graphing calculators, this time directed toward its newest ti. Background on logarithms, history of the slide rule, and how it all works. Rapid and simple calculation of range to target, based on a measurement of the target with a mildot reticle, by aligning the estimated target. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. It is featured here to illustrate a simple, small, pocket, slide rule. Stimulus check calculator find out how much your economic stimulus check will be using this handy tool.
Here derek has put together a number of working slide rules that can be used for calculations and demonstrations on the computer. The patent was issued by the united states patent office on august 9, 1904. If you look at some of the holders there are 2 long strings often leather at the end. Angle divisions were originally in minutes, but decimal divisions gradually became predominant, in decitrig slide rules. 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. The ones, which still exist, will eventually deteriorate with time. The slide rule also does not tell you the sign of your result. The site has instruction manuals for a number of slide rules. The mildot master is an analog calculator designed along the principle of a slide rule, utilizing logarithmic and inverse logarithmic scales developed specifically for performing the following operations.
It was a indicator of just how much the person could spend on a sliderule. Just follow the instructions printed right on the slide itself and the calculations are done for you. So that instead of calling up a calculator to do a little calculation, i could call up a slide rule. Your target audience is overrun with more and more information, and they have less and less time to absorb it. I think the teacher used it one time to preform a calculation just to show us that it could be done. 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. The classic shock tech shock and vibration calculatorslide rule is now available as an app for your iphone and ipad. If you click on the image a scan of the article is available in pdf format. This is a picture of a basic beginners slide rule for various math operations including. By the late 17th century, the slide rule was a common instrument with many variations. Use this basic calculator for math with addition, subtraction, division and multiplication. For sizing either the trunks or branches simply align the friction rate with the cfm and the duct size will be displayed note.
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