How do you use the circular slide rule?
To divide a number by another number, align the two numbers on each ring. Read the result at the arrow on the ring with the number you are dividing by – the ring with the denominator. Since we are now dividing by 450, the result will be across from the arrow on the same ring as the 4.5 number.
Does anyone still use slide rules?
Though they’re no longer produced, the company still stocks around 1,200 or so and occasionally gets an order for some. Why would anyone still want to buy a slide rule, when inexpensive calculators are so readily available? According to Haase, slide rules are better suited to some functions than are calculators.
What is a slide rule calculator?
The slide rule is a mechanical analog computer. As a graphical analog calculator, the slide rule is closely related to a nomogram; the former is used for general calculations, the latter for application-specific computations. At its simplest, each number to be multiplied is represented by a length on a sliding ruler.
What is circular slide rule?
Slide Rules Circular Slide Rules Slide rules that are round offer the length of a 10″ rectangular slide rule in a pocket-sized (roughly 3.6″) format, since the scales are on the circumference of circles.
How does a cylindrical slide rule work?
Writing a logarithmic scale in a spiral that is then imprinted around the outside of a cylinder allows instrument makers to lengthen the scale.
How do you clean a slide rule?
It is usually safe to wash the entire rule in warm soapy water (Palmolive works great) IF it is made of Ivorite. This works for the 4181, Deci-lon and Doric rules. After cleaning, they should be rinsed and blow dried and all spots removed, especially under the cursor.
Is there a slide rule simulator or emulator?
It is a Slide Rule Simulator or Emulator. All the scales are programmatically drawn based on reverse enginered mathematical equations. As such, no images are used for visualisation (only some decorations). And this is why those simulations are of the highest quality.
Are there any slide rules that still exist?
Slide rules are not manufactured anymore. The ones, which still exist, will eventually deteriorate with time. Here you will find a collection of some of the most prominent models carefully hand-crafted and simulated (or emulated) in JavaScript. All the scales are programmatically drawn based on reverse enginered mathematical equations.
What can you do with slide rule replicas?
Some of the replicas carry an interactive tutorial, where you can also practice using a slide rule. In particular, you can use the Raven and the Templar for learning. However, there is also a training game included, where you are required to pass some slide rule tests.