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Dating k&e slide rules
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Vintage Instruments: Slide Rules and More

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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Drafting Supplies, Discount Drafting Equipment, Drafting

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

K&E slide rules One of the more interesting aspects of K&E was their use of spiders , whose webs privided filaments used in crosshairs of their range finders, as did other firms. Unusual choice for a corner light post at Fulton and Nassau Streets, as this type is usually found in city parks and it’s unusual to see them festooned with street

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

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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Chemical Slide Rules - Calculating History - Google Sites

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

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

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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Net Resources Index - Rod's Slide Rules

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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Gloom - YouTube

K&E 4053-3 slide rule, early 20th century (Click photo to enlarge) The Duplex rule Meanwhile it became obvious that it would be nice to use both sides of the slide rule for calculation, and the way to do this was invented by William Cox in 1891.

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

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

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Greg's Slide Rules - Keuffel & Esser 68 1318

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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Coulomb's law - Wikipedia

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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K&E Catalogs Main Page

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

The K&E 4160 slide rules have no table, so they can only be dated by their scales. On the early rules described by Clark McCoy, [5] with production number 161 from 1915–1916 and number 207 from 1916–1921, the mark of Antimony (Sb, 120.2) coincides with the Carbon (12.0) mark.

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Slide Rule Dating - K&E Catalogs Main Page

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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Keuffel and Esser, Standard Scales

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Vintage Instruments: Slide Rules and More

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

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

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

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

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

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 Dates. Slide Rule Museum; Ed

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

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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Faber Castell Slide Rule | eBay

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 Rule Collection - jclahr.com

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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Cardboard Engineering & Science Slide Rule Calculators

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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CiteSeerX — This JOS Plus Only article is an expanded

Dating of this item was done from information on the Clark McCoy website (2009) and comparison to images of slide rules available there. K&E had their main office and factories in Hoboken during the period when this item was made.

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Online dating psycho meme - The Idea Box

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

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Charpentier Calculimetre Keuffel & Esser

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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Keuffel and Esser - Wikipedia

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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only slightly OT- how common were these promotional

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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Slide Rule Dates and Time-Lines

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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LESSON Properties of Logarithms 5.7 B - Prek 12

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

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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Keuffel & Esser 4012 Thacher Cylindrical 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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Slide rule - Simple English Wikipedia, the free encyclopedia

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.