keuffel & esser slide rules

Posted by ⚡Survenator⌁ on May 3, 2016 at 5:51pm

Here’s a display of Keuffel & Esser slide rules, the calculating tool of days gone by. I was an avid collector of slide rules back in the 1990s and still have much of the collection safely stored away, out of sight, but this display case still sits out, showing the crème de la crème of the K&Es that I amassed back when they could be found weekly at estate and yard sales. The rules shown range from the 4" scale size pocket models to a 20" long duplex that would have given far more precision, but is intended for desk use only. The Rev. William Oughtred is credited as the primary inventor of the slide rule in 1622, based on other 17th century work on logarithms by John Napier and logarithmic scales by Edmund Gunter. Before the advent of the pocket calculator, the slide rule was the most commonly used calculation tool in science and engineering. The use of slide rules continued to grow through the 1950s and 1960s, even as digital computing devices were being introduced, but in the mid 1970s, the handheld electronic calculator made the slide rule largely obsolete. These K&E slide rules shown all date from the 20th century, and include some specialized models for surveyors and electrical engineering. #sliderule #sliderules #keuffel #esser #kande #keuffelandesserco #calculator #calculators #engineer #engineering #spacerace #spaceprogram #nasa #engineers #surveyor #surveyors #surveying #calculation #nobatteries #nobatteriesrequired #survey #electricalengineering #civilengineer #civilengineering #math #mathematics #maths #handtools #handtool by thedancherry http://ift.tt/1W6PE0r

Comment As

Member
FB Page

★

Votes: 0

You need to be a member of Land Surveyors United - Global Surveying Community to add thoughts!

Join Land Surveyors United - Global Surveying Community

Comments are closed.

Land Surveyor Photos

Survey Photos by Tag or Category

Earth's Largest Survey Photos Collection

Since 2007, Land Surveyors around the world have shared their best Surveying Photos from the field. Inside this collection you can transport yourself to virtually any location on Earth and see how Land Surveyors work, types of equipment being used and environmental challenges associates with being a land surveyor in that location.

Location Based Chapter Hubs also have photos specific to the locations they represent. You can use our Surveyor Apps for quick sharing of your photos from the field.

Note: Members who have uploaded their photos of surveying to this collection can also move their photos to location based hubs. To see how, follow this tutorial.

Looking for Specific Types of Surveying Photos? Check out the Surveying Photo Feeds Page. Want to see photos submitted by surveyors grouped by tag? Check out the Photos Categories Page.

ABOUT SURVEY PHOTOS

Survey Photos by Tag or Category

Earth's Largest Survey Photos Collection

Location Based Chapter Hubs also have photos specific to the locations they represent. You can use our Surveyor Apps for quick sharing of your photos from the field.

Note: Members who have uploaded their photos of surveying to this collection can also move their photos to location based hubs. To see how, follow this tutorial.

Looking for Specific Types of Surveying Photos? Check out the Surveying Photo Feeds Page. Want to see photos submitted by surveyors grouped by tag? Check out the Photos Categories Page.

Local Survey Photos

Photo Tags

Survey Photos Tags

Equipment Photos

Survey Equipment Photos

Land Surveyor Equipment Photos

Please Note: Photos Sections inside Hubs are New, so please post your photos there

Where are you surveying?

📸 Land Surveying Photos