What is dietzgen slide rule?

The rule fits in a black leather case with a metal clasp. A Dietzgen logo is on the flap—the letter D inside the letter E inside the letters Co. In 1959 Dietzgen introduced the Microglide line of slide rules, which featured Teflon-lined grooves on the base so that the slide moved more smoothly.

Where is the international slide rule Museum?

Mail checks or donated items to: ISRM, 1944 Quail Circle, Louisville, CO 80027, USA. You can purchase t-shirts, mugs & gifts with the ISRM Logo from the museum’s souvenir shop. NEW! You can get custom wall clocks with images of popular circular slide rule models.

Are slide rules worth anything?

The rarest slide rules are 19th Century hand-engraved instruments such as Palmers Computing Scale (a circular model), first published in 1843, or the cylindrical ‘Thacher’s Patent Calculating Instrument’ slide rules produced by Keuffel and Esser Co in the 1880s. These can run close to $1,000 in good condition.

Does any company still make slide rules?

The only maker that still produces “classic” slide rules is the Japanese maker Concise. You’ll find more information about their current circular slide rule offerings at their website.

Who made the best slide rules?

Reverend William Oughtred
The Reverend William Oughtred and others developed the slide rule in the 17th century based on the emerging work on logarithms by John Napier. Before the advent of the electronic calculator, it was the most commonly used calculation tool in science and engineering.

What invention led to the slide rule?

Brief History Napier invented logarithms in 1614. This led to the creation of the first slide rules by Anglican minister William Oughtred. His slide rules had both straight and circular-shaped versions. They calculated distance, multiplication, and division.

Can you still buy slide rulers?

There are many pages about slide rules on the web, and you can still buy brand new slide rules (40 years old but never used, and still in their factory supplied box) in various places. This is one of the fanciest and most beautiful slide rules ever made, a Faber Castell Novo Biplex 2/83 N.

Are old slide rules worth money?

By the end of the 1970s, all the slide rule manufacturers died. So there were several models sold that had a math calculator on one side and a slide rule glued to the back to do those other functions. Those are worth a lot of money if you’re collecting.

What replaced the slide rule?

The slide rule remained an essential tool in science and engineering and was widely used in business and industry until it was superseded by the portable electronic calculator late in the 20th century.

What is Oughtred slide rule?

The slide rule is a mechanical analog computer. The Reverend William Oughtred and others developed the slide rule in the 17th century based on the emerging work on logarithms by John Napier. Before the advent of the electronic calculator, it was the most commonly used calculation tool in science and engineering.