Various other conveniences have been developed. Ah, I still remember my first time… Summer of freshman year of college, had a job working in a plywood plant. I bought a calculator that had a green fluorescent display and a pi key. The slide rule is an example of a mechanical analog computer The cloth covering is sometimes textured and sometimes plain. The earliest range of celluloid faced mahogany slide rules date from about up to the First World War. Until or possibly these had the same type of frameless cursor as the later spring metal backed rules. This allowed the user to directly perform calculations involving roots and exponents. It is difficult to be certain of the time frame for their manufacture as they pre- date the stamping of a date code on the back of the rule.
The slide rule, also known colloquially in the United States as a slipstick, is a mechanical Replacement parts are scarce, expensive, and generally available only for separate purchase on individual collectors' web sites.
The Keuffel and.
Slide Rules Were The Original Personal Computers Hackaday
Spare & Repair Parts CLICK to return to The Slide Rule Universe This Section Updated Regularly Click REFRESH on your browser if pages seem unchanged. THE simple slide rule, consisting of two logarithmic scales drawn on strips of we think we should mention the names of the component parts of a slide rule. that in moving along scale A, you will be passing the logarithmic "milestones".
Nevertheless, Pickett, probably America's most successful [ citation needed ] slide rule company, made all printed scales.
First, align the leftmost 1 on the C scale with x on the LL scale. For instance, there are two nines on the A scale; to find the square root of nine, use the first one; the second one gives the square root of Alexander George Thornton is recorded as being apprenticed to William Henry Harling, a London maker of drawing and surveying instruments.
Slide rule dated Slide rules are not typically used for addition and subtraction, but it is nevertheless possible to do so using two different techniques.
Video: Slide rule pass original parts How to Use a Slide Rule: Multiplication/Division, Squaring/Square Roots
Dave's slide rules
Other kits would provide parts to build items such as a small spectrograph. Macfarlane used a slide rule having scales of equal parts with numbers in geometric .
of the rule (i.e. the parts under which the sliding scales pass) are bevelled. original length would be 12 inches, according to the standard in use in You might have missed it, but slide rules show up in Titanic, This Island Earth, and Apollo If you are a fan of the original Star Trek, Mr.
Thornton Wooden Slide Rules
June PIC No slide rule dated Aroundan inexpensive model from B. One of the problems we had to solve was the orbit time of a satellite orbiting the earth. If the cursors remained correctly locked together then Cursor B should again be pointing at the first multiplicand 1. However actual rules seen with frameless cursors dating from or later stamped Made in England have a different type of screw from those on the series 1 rules.
. Four screws pass through the wooden parts into tapped holes in the metal running edges. So for this version I used parts from a spare 8" Gilson slide rule similar to my Gilson Keeping Cursor A fixed over 1, rotate Cursor B to pass through the first.
"is the original form of the slide rule. Gunter's scale contained no sliding parts and, therefore, was not a slide rule. pass a line ED' and turn it about E untill.
Petroleum jelly was what most people used on metal rules.
You can use a Slide Rule to hit the obnoxious person in the next cubicle. Eximius Diu 6, pdf 22 MB. I added colored circles around the big numbers - red for 1, 2.
Then make the two cursors, you might have to use some ingenuity here ;- I showed how to use two transparent layers in version 1and how to use a Gilson mechanism in this version 2. Proportion wheels are simple circular slide rules used in graphic design to calculate aspect ratios.
The S, T, and ST scales are used for trig functions and multiples of trig functions, for angles in degrees.
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|You will notice cryptic marks on the cursor of a slide-rule, and elsewhere, called gauge points.
All these rules are laminated sheet Astralon PVC. Painted or imprinted slide rules were viewed as inferior because the markings could wear off. Wrote a loop to estimate that value by summing logarithms, of course… see it ties in.
I remember seeing seniors walking around school with slide rules hanging from their belts.
Sher and Dean C. I vividly recall that at the end ofthe students who were still using slide rules were given an additional 15 minutes on the final examination to compensate for the computational advantage afforded by the calculator, hardly adequate compensation in the opinions of the remaining slide rule practitioners.