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Dating k&e slide rules
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Faber Castell Slide Rule | eBay

K&E made some of the best slide rules. They were accurate, looked good, and worked well.

Dating k&e slide rules
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K&E Sperry Pocket-Watch Slide Rules

Also interested in slide rules dating before the early 1900's including early K&E and Lenoir/Tavernier/Gravet slide rules. Clark McCoy - Roseville, CA. Collector.

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All About Slide Rules Book (PDF) - hpmuseum.org

Welcome to Vintage Instruments: Slide Rules and More. New and Previously Owned Instruments of Math, Science, and Engineering more-modern drafting sets by companies such as K+E and Wild. It also includes some new, single, drafting instruments plus drafting rules, triangles, and other similar items. A much larger selection of drafting and

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CiteSeerX — This JOS Plus Only article is an expanded

Thacher's Calculating Instrument. The ultimate cylindrical slide rule, invented by Edwin Thacher and patented in 1881. Thacher had the scales divided by W.F. Stanley, in London.

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Gloom - YouTube

Dick Lyon's nonpatent table of Otis King's patent calculators I intend to keep the table (below) of known Otis Kings up-to-date and publicly accessible as people send me info on more Otis King's patent calculators (also known as Carbic or Geniac cylindrical or spiral slide rules, among other things).

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Thacher Calculator - Humboldt State University

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1940s dating rules dating in the 1940s and 1950s | xcskiworld

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My Slide Rule Collection

Coulomb's law, or Coulomb's inverse-square law, where k e is Coulomb's constant but when the charges are moving more quickly in relation to each other, the full electrodynamic rules (incorporating the magnetic force) must be considered. Quantum Field Theory origin

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Thacher's Cylindrical Slide Rule - American Artifacts

Find great deals on eBay for Faber Castell Slide Rule in Science Slide Rules. Shop with confidence.

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LESSON Properties of Logarithms 5.7 B - Prek 12

Unfortunately, common slide rules were only accurate to a couple of decimal places. Edwin Thacher invented a slide rule with scales equivalent to 66 feet in length instead of the 10 inches of common slide rules. For your further interest a link is provided to a copy of the Operator's manual for the Thacher Calculator at McKoy's K&E catalog

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Keuffel & Esser 4081-3 Log Log Decitrig Duplex Slide Rule

The Keuffel and Esser Co., also known as K & E, In the 1920s, K & E started manufacturing slide rules. The company produced the 4139 Cooke Radio Slide Rule, designed in the mid-1930s by Nelson M. Cooke, of the Navy's Radio Materiel School, thousands of which were made.

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Keuffel & Esser 4012 Thacher Cylindrical Slide Rule

7/9/2007 · Slide Rule: Post Versalog No. 1460 (Click on this and all pictures for a complete full-size view of the slide rule) Selective Luddite™ that I am, I've long been fascinated with slide rules.

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Slide Rules : Their History, Models, And Makers: Peter M

The scales on the front and back of a K&E 4081-3 slide rule. Most students learned slide rule use on the linear slide rules, and did not find reason to switch. historical dating of specimens, Slide Rule Course, Loaner Slide Rules for Schools, etc. The history, theory and use of the engineering slide rule – By Dr James B. Calvert,

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Cardboard Engineering & Science Slide Rule Calculators

Welcome to Vintage Instruments: Slide Rules and More. New and Previously Owned Instruments of Math, Science, and Engineering

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Dick Lyon's nonpatent table of Otis King's patent calculators

Keuffel & Esser N4083-3: Greg's Slide Rules Images . Keuffel & Esser N4083-3 - Notes: This rule is very similar to the 4081 series of rules with the omission of the K scale and the addition of three vector scales, Th, Sh1 and Sh2 which were used extensively in the electronics and power industry. For K&E serial number dating use the link

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Keuffel & Esser K&E K+E History - Antique Surveying

Later on K & E bought the rights and offered them here in the US until the end of production in the early 70's. There are sites online that are devoted to the science of dating these where one can narrow it down. 3 Slide Rule Manuals for Gilson & Midget Circular Slide Rules Like new for the small circular rule the Midget, and the large

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keuffel esser slide rule 4080-3 | eBay

Source of 1874 Logo. Keuffel & Esser produced slide rules and imported planimeters for over 100 years. This web site is provided to help slide rule and planimeter collectors understand the works of this great American manufacturing company.

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Slide Rule Dates and Time-Lines

Keuffel and Esser, Standard Scales: For more detail, dating and related history go to the K&E Catalog Page by Clark McCoy. Mocronta 150/157 and many others. It is a compatible swap for all the K&E and Dietzgen 10inch Duplex slide rules including the 20inch duplexes, like the 4081-5. You just have to decide if the Relay/Ricoh bamboo

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Hughes and McCoy - KE Dating - JOS Plus Only version revA

Properties of Logarithms B efore machines and electronics were adapted to do multiplication, division, and which equals 1000. Later, slide rules were invented to shorten this process, although logarithm tables were still used for more precise calculations. which is …

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LOWER MANHATTAN - Forgotten New York

12/31/2017 · From what I've read serial numbers aren't a strong method of dating K&E slide rules in any event. This link contains much more information than I can provide. 12-31-2017, 03:21 PM