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Dating k&e slide rules
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Keuffel & Esser K&E K+E History - Antique Surveying

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

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

I'm Kassie, also known as Gloom! I do variety gaming, livestreams, reviews, playthroughs, commentary, silly sketches, challenges, Q&As, and whatever makes my

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K & E Log Log Duplex Decitrig Slide Rule - Album on Imgur

Find great deals on eBay for keuffel esser slide rule 4080-3. Shop with confidence.

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Let the Finder Beware: Slide Rule: Post Versalog No. 1460

My collection of k e slide rules.K e 4081-3 ca.1937 this is the probably the oldest 4081-3 in my collection, dating back to the year it was first introduced serial number places it to 1937.Prudence is giving her New Year's presents with those I have received.Affright children as she pauses at the window.The rugs, and the hangings, all pointed

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Gloom - YouTube

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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Polyphase (Mannheim) Slide Rule 4053-3, 10", made by

We have a variety of professional-grade discount drafting supplies, drafting tools, and drafting equipment. We represent the most well-known brands of drafting supplies and equipment in the industry known for quality and reliability.

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Slide Rule Dating - K&E Catalogs Main Page

1891 - First slide rules using Cox's duplex construction manufactured by K&E. Chicago Branch established. 1892 - K &E added 4 more stories to their building at …

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The History of the Cursor and Evolution of the 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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Net Resources Index Accuracy Checking the accuracy of a slide rule Aristo Dating of K & E Rules Clark McCoy's Model Cross Reference Links for Catalogs Michael O'Leary's K&E Spreadsheet Cross Reference Index K & E Slide Rule Manuals A large list of K & E patents

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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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Patented-Antiques.com Sun-Hemmi - Aristo Slide Rules

34 K&E Sperry Pocket-Watch Slide Rules Peter M. Hopp C.Eng. M.B.C.S Introduction K&E/Sperry pocket-watch slide rules are rather special and

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Drafting Supplies, Discount Drafting Equipment, Drafting

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Antique Measuring Tools at The Best Things

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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Keuffel and Esser, Standard Scales

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

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Net Resources Index - Rod's Slide Rules

2 Antique 1' 2 Fold Boxwood Caliper Rules Both are in excellent condition. Both are the equivalent of a Stanley #32. Both are the equivalent of a Stanley #32. The top one is marked H. Chapins & Son #32.

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Greg's Slide Rules - Keuffel & Esser N4083-3

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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Thacher Calculator - Humboldt State University

Keuffel & Esser 68 1318 - Notes: I believe that this rule probably dates from roughly 1963, this is based on the serial number. For K&E serial number dating use the link here to Ed Chamberlain's reference set of dating curves.; This is the progression from the 4080 …

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My Slide Rule Collection

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

K & E Log Log Duplex Decitrig Slide Rule, CD side. My Dad worked for the US Navy (civilian contractor. He interacted with a lot of NROTC Midshipman.

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Vintage Instruments: Slide Rules and More

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

The Charpentier is a beautiful example of a circular slide rule dating from approximately 1882. In some instances, the calculimetre is also stamped with the mark of Keuffel & Esser Co. of New York and Chicago, and K&E acted as an importing agent and distributor. The reglasdecalculo.com site has old ads for the Charpentier and other

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

1/26/2009 · only slightly OT- how common were these promotional specialty slide rules Showing 1-10 of 10 messages. only slightly OT- how common were these promotional specialty slide rules: Bill Noble: 1/25/09 6:04 PM: Pickett or K&E slide rule, so I'm kind of surprised that anyone would

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Coulomb's law - Wikipedia

Keuffel & Esser 4012 Thacher Cylindrical Slide Rule Previous. one with a magnifying glass (K&E model 1741 before 1900, K&E model 4013 after) and one without (K&E model 1740 before 1900, K&E model 4012 after). This is a model 4012; the serial number suggests it was manufactured around 1915. 125–127; Keuffel & Esser Co., Slide Rules and

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Faber Castell Slide Rule | eBay

the serial number series rollover dates and slide rule dating by Richard. The six digit numbers found on K&E slide rules after 1922 have been referred to as “serial numbers”. Some people do not like to call them serial numbers since the numbers roll over at 999,999 and start over at 1; therefore, the numbers are not unique.

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only slightly OT- how common were these promotional

ID: Manufacturer: St: Country: Model: Name: Serial: Patent: Patent: Patent: Patent: Patent: Patent: Slide Pat: Copyright: Scales: Scales: L (cm) BaseMaterial

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keuffel esser slide rule 4080-3 | eBay

K&E also sold leather belt clips that enabled students to wear their slide rules like swords. An annual visitor to the campus brought an engraving machine to personalize slide rules with the owners' names..

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K&E Sperry Pocket-Watch Slide Rules

Notes on Dating K&E Slide Rules. K&E put serial numbers on their slide rules starting in 1922. They recycled the numbers in 1943 and 1954, and sometime in the 1960's.

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Slide rule - Simple English Wikipedia, the free encyclopedia

Buy Slide Rules : Their History, Models, And Makers on Amazon.com FREE SHIPPING on qualified orders From The Community K E Slide Rules LYMAN M. 5.0 out of 5 stars 5. Slide Rules : Their History, Models, And Makers. Set up a giveaway.

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Thacher's Cylindrical Slide Rule - American Artifacts

Measuring Tools. Explanation of Our Condition Grading System. Frequently Asked Vintage Tool Questions. ME180882 The L..S. S. Co. Also marked "Tempered". I am not good at dating these but I certainly think that they are pre-war. They have an even light patina as one would expect on a well kept machinist's tool. The only complaint is that a

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Vintage Instruments: Slide Rules and More

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

Cardboard Engineering & Science Slide Rule Calculators You definitely always wrote your name on them in indelible ink since there was a tendency for those cardboard slide rules to sprout legs and walk away while you were at lunch or in the can. K&E Beginner's …

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K&E Catalogs Main Page

Dating K&E Slide Rules: Here are some excerpts written by Clark McCoy: Serial Numbers: Serial numbers started in 1924 beginning with 0 and going through 999999 then rolling over to 0 again. There were three rollovers occurring in 1943-1944, 1954, and 1962. In general the production rate was about 70,000 rules per year until the 1950s.

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LESSON Properties of Logarithms 5.7 B - Prek 12

The six digit numbers found on K&E slide rules after 1922 have been referred to as “serial numbers”. Some people do not like to call them serial numbers since the numbers roll over at 999,999 and start over at 1; therefore, the numbers are not unique.

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Slide Rule Dates and Time-Lines

Dating K&E Slide Rules. Dating a particular K&E slide rule can be a challenge. In most cases dating of a particular slide rule requires consideration of several parameters.

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Chemical Slide Rules - Calculating History - Google Sites

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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Charpentier Calculimetre Keuffel & Esser

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