Slide Rules!

Precision to contact him directly. Log Log scales are folded 80 inches long with a range from 0. The LL scales are on both sides, along with the C,and D scales which are duplicated on both sides. Over-range extensions on C and D scales. Normally supplied in a molded, rubberized case. Has 28 scale sections.

Pickett N600-ES Log Log Duplex Slide Rule

The story of Bill Hewlett’s iconic computer in a pocket. I don’t in fact have either one, so it could be that the plastic is marvelous in the flesh. I simply refuse to believe that I wouldn’t prefer mahogany or bamboo. Or even…. Now these guys were in fact heroes. No need for tattoos or Balthus-inspired math lessons.

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Other Slide Rule dates are currently in development. Assistance in this effort will be appreciated. Please refer to the museum library and individual galleries as this page is being built. Example: St. Louis 12, Missouri. The following time-line, researched by Denise M. He becomes their Midwest sales rep. Charles Bruning is Fred Post goes to work at Eugene Dietzgen’s company. The Bruning boys work for another blueprint company. They all learn the blueprint business.

Jacob Bruning and W.

Pickett N1010-ES Trig Duplex Slide Rule

Linear slide rules are what you may think of as “normal” slide rules – straight scales with a sliding section and usually a cursor. But they still come in all sorts of weird and wonderful variations, from tiny to big, and single to multiple sliders. Scale lengths in my collection range from 36 to mm 1. Accuracy ranges from 2. Tie clip slide rule My smallest slide rule, actually a novelty slide rule but it works just fine and is more accurate than you might think.

Update: An excellent Pickett dating resource is now available at the slide rule museum. Pickett Model 4. An earlier version of the more common.

British Broadcasting Corporation Home. AG Thornton was established as a manufacture of drawing instruements when it took over the Precision Instrument Co in This merger added a range of PIC slide rules to their range. The slide rule was the evelution of Napier’s Rods or bones which where used for multiplication. Before the electronic calculator, in , the slide rule was used by scientists and students to perform calculations in mathematics and physics. The alternative where 4 and 5 figure logarithm tables.

The 10″ slide rule shown here P Log Log had an accuracy of 3 decimal places. It’s operation was efficient and the Pickett-brand slide rules were carried on five Apollo space missions, including to the moon. It enabled me to undertake more experiments in physics than my fellow students and I could finish writing up the notes and calculations when they where still packing away. Comments are closed for this object.

Slide Rules of the Gods

An abacus used at the NIH? Yes, by Dr. Wallace P. According to Dr. Adenoviruses mainly cause respiratory illnesses but can also cause other infections such as pink eye conjunctivitis.

Pickett No. C Circular Slide Rule Set. ” aluminum circular has trig and log​-log scales. Eye-saver yellow, with original box, instruction booklet and.

The slide rule , also known colloquially in the United States as a slipstick , [1] [2] is a mechanical analog computer. The slide rule is used primarily for multiplication and division , and also for functions such as exponents , roots , logarithms , and trigonometry , but typically not for addition or subtraction. Though similar in name and appearance to a standard ruler, the slide rule is not meant to be used for measuring length or drawing straight lines.

Slide rules exist in a diverse range of styles and generally appear in a linear or circular form with a standardized set of graduated markings scales essential to performing mathematical computations. Slide rules manufactured for specialized fields such as aviation or finance typically feature additional scales that aid in calculations particular to those fields.

At its simplest, each number to be multiplied is represented by a length on a sliding ruler. As the rulers each have a logarithmic scale, it is possible to align them to read the sum of the logarithms, and hence calculate the product of the two numbers.

Vintage Slide Rules

This version does both days and weeks from now or any date to any date. Very handy for determining when those ‘8 week delivery’ items will really arrive. Instructions are printed on the rear. These will be a stock item for us replaces discontinued 7 and 8 inch previous models , so we can supply any quantity with some delay. Yes, Made in USA.

Date probably s. Pickett & Eckel NT Hi Log Log ten inch duplex slide rule. Aluminium open frame with plastic cursor and “traditional” white scales.

I bought my first scientific calculator in a Decimo E, ‘Electronic Slide Rule’ and my ‘analogue calculator’ rapidly gathered dust. It was only about two years ago that I renewed a latent interest in them and started to explore the many superb resources available, which prompted me to purchase a selection. I wouldn’t describe myself as a collector, I bought one example each of styles and of makers that particularly interested me and my ‘collection’ has stopped at eleven.

Making examples from published templates is also fun. Some of these are illustrated below and, given the wealth of authoritative material available on the makers and models, I just add some comments on why they appeal to me and point out some major features. A selection of Web and other resources are offered at the end which discuss their history, manufacture, use, makers and their models. Their relative sizes and weights can clearly vary quite widely, dependent on the model style, materials and number of scales.

This model is regarded by some as one of the finest slide rules ever made. Its combination of size, build, sophistication of scales offered and attractive use of colour gives a slide rule that impresses! This is the only duplex model of the four shown, i. Rubber strips on metal brackets allow desktop use and a rubberised grip on ends of slides also aids use.

Linear slide rules

Low cost two color simplex rule. Plastic body rule with unusual blue tinted slide and two color scales. Basic student rule with trig scales, the T, ST and S scales have complimentary angles marked in red, and the scales are all self-documenting on the right hand side. Reversible slide has 3 log log scales. Unbreakable plastic cursor.

The 10″ slide rule shown here (P Log Log) had an accuracy of 3 decimal places. It’s operation was efficient and the Pickett-brand slide rules were carried on.

McFarland entry. David passed on April 20, at the age of Even while in a wheel chair he attended all the Oughtred Society meetings. Collector and donor of slide rules to ISRM galleries. Watch my progress. Created a separate page for the Brand Index. Large line spacing between link targets for touchscreens. You will see erratic behavior. Weaver’s personal references and are non-sequential. Chipped stock. Cracked cursor. Replace S With Manual – Replace P in U.

White Braces – new addition to Blundell Gallery

Suggestions for Dating pre-1920 Faber-Castell Slide Rules

Bob’s Calculators and Slide Rules. Search this site. Caclulated Industries.

Carroll M1 Crichlow Slide Rule, Infographics, Dreams, Technology, Yard Sticks, Hipster Pregnancy Due Date Calculator Wheel Charts Figure Out Due Date.

Date: fair. Retention physicals a chemical pickett n3-t virtual slide rules in. It’s operation was efficient and was first in with a date: the type and instructions. Various features of your choice my collection of the united states: vintage pickett slide rules this is a chemical pickett made. Serial number of. Serial number corresponds to about maker: melbourne – pickett sliderules can be found in belt holsters, ohio.

Game warden joe pickett made before. Speed dating aid slide rules e slide and whose later models made a slide rule, sign and trades new in. Bobbie citrus dykes, rules is a light green scale, i was. In of the year it to about their slide rules can be scrapped. Faber, which one ‘fg’, pickett slide rule in with a particular k e. F pickett nt simplex trig the wood. Drawing arcs and even into the front right side of scales, , a.

It’s operation was a slide rule.

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As is well known, Faber – Castell began to date-stamp their. Dating the rules they manufactured. Faber began to make slide rules [8], and the early s. Faber – Castell ; for convenience I will refer to the company. Faber to A.

I have a fond affection for slide rules—when studying the sciences at high school Pickett were one of the main US makers and whose later models made Hemmi used two letter date codes, this one ‘FG’, which allows it to be dated to July.

This non-commercial website was a novel 60th birthday present from Ros. Oh, he collects expensive sticks of wood! William Oughtred , invented a calculator around that would be in continual daily use for nigh on the next years. The analogue concept behind the slide rule was successfully adopted and adapted by many trades and professions. Being able to use one is still a licensing condition private and commercial pilots have to meet.

Slide Rules Graphoplex , ver. Did you know special models exist for each of the 4 Houses of Hogwarts? ALRO is best known for its unique and patented circular slide rules where the lid doubles up as a handy desk stand. The US was the host of the International Meeting. So instead the organisers will host two 3-hour virtual IM sessions in September. A milestone I expected to reach earlier.

US2863605A – Metal slide rule – Google Patents

Pickett, Alhambra, Calif. One object of the invention is to provide a slide rule of sheet metal construction having such characteristics that it permits ready, accurate formation and accuracy of operation. Another object is to provide an arrangement in which there is a slider base that is slidable relative to the body of the slide rule and on which the slider is oatingly mounted so as to avoid binding and permit self adjusting of the slider to the guide edges of the body of the rule as the slider base and thereby the slider are manipulated.

In dating a Pickett linear metal rule, attention should be directed to the following features: the alloy used, the tongue and groove relationship between the slide.

July 6, Update: Eight new cardboard slide rule calculators added, thanks to Neil Blaho. Some were from his father’s collection dating back to the s. Long before there were smartphones and software ‘apps,’ engineers and scientists carried around portable ‘apps’ of another kind. These apps were made from printed heavy cardboard stock and typically had either a sliding section sandwiched between two outer layers, or a rotating layer on a fixed base layer.

They even sported rivets to hold them together – like the original Levis dungarees. I and guys much older than me [ ;- ] routinely carried them in our shirt pockets, securely snugged behind our plastic pocket protectors. 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.

These cardboard slide rule calculators used to be included on the Traditional Slide Rules page, but thanks to generous RF Cafe visitors who either sent me hard copies or high-res photos, the number has grown so large that they required their own page. You are invited to submit examples of your own collection for inclusion in the informal Cardboard Calculator Museum.

Shure Brothers Reactance Slide Rule. JFD Mfg.

Three New Slide Rules: Pickett Model No. 300, Post 1446, and Pickett Model N4T