My Slide Rule Collection

American Artifacts Catalog scientific instruments Medical Instruments tools and technology farm tools calculators and slide rules household and office. American Artifacts. Thacher’s Calculating Instrument The ultimate cylindrical slide rule, invented by Edwin Thacher and patented in Thacher had the scales divided by W. Stanley, in London. The end of the slide on this example is marked ” Patented by Edwin Thatcher, C.

Slide rule

The first logarithmic calculating rules did not slide at all This ” Gunter’s Rule ” was the original device introduced by Edmund Gunter in , which remained in use for some two centuries. This idea remained for three centuries at the heart of every slide rule made.

Keuffel & Esser K & E A German manufactured model from the late ‘s; Carriage has two sockets; Supplied with two test rules; slide show.

I had one and thought I was proficient at it. Sadly, I misplaced it years ago. The slide rule was a simple device with one sliding part that could do complex mathematical calculations in moments. Multiplication, division, roots, logarithms, and even trigonometry could be performed with ease. But as technology marched forward with sophisticated computers and graphing pocket calculators, the lowly slide rule was forgotten. Much of the engineering of the world we live in was designed with the use of slide rules, and yet they are almost forgotten today.

Do you have a teen-aged child or grandchild? If so, ask him or her what a slide rule is. Wikipedia states that William Oughtred and others developed the slide rule in the 17th century, based on the emerging work on logarithms by John Napier. The online encyclopedia then goes on at length to describe the history, use of, and eventual obsolescence of the slide rule. Want to amaze your grandchildren? Buy a slide rule to show them. You can also keep it for nostalgia reasons.

Still have my Pickett log-log slide rule.

Do You Remember the Slide Rule?

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.

Gauger’s rule, boxwood, dating k&e slide rules 2 slide, 1 side, Dring & Fage, 12″. Hussein gardens communication at the life of driver mayor, across the adapter.

Keuffel and Esser, Standard Scales. Established in , sold rules from , began manufacturing their own rules in and continued until The report predicted that, by the year , Americans would live in domed cities possibly influenced by Issac Asimov’s robot novel Caves of Steel and watch three-dimensional television. Unfortunately for the company, the report failed to predict that slide rules would be obsolete in less than ten years, replaced by the pocket calculator.

They transitioned into CAD equipment in the ‘s. This gallery begins with the long 20″ slide rules, then continues by model number, sorted by date of manufacturer. Detail of factory markings.

Dating faber-castell slide rules

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The K&E slide rule was first introduced in , replacing the In the ST scale was replaced with an SRT scale, dating this one to earlier.

On the west wall on the Ann St. A Landmarks Preservation Commission Report for the building is available on the internet at www. Established in by Wilhelm Keuffel and Herman Esser, the company was prominent at the turn of the 20th century for drafting and surveying instruments — hence the calipers, triangle, pliers and other tools in the cast iron storefront.

The building above served as offices and a retail outlet. The website jerseyhistory. They were two German immigrants, who were importers and jobbers of drawing materials and mathematical and surveying instruments. Keuffel , born in Walbeck, Germany and was employed in the hardware business in Germany and Birmingham, England, prior to his immigration to Hoboken, NJ, in The next year he joined with Herman Esser who was originally from Wuppertal-Elbertfeld.

Wilhelm J.

Vintage Slide Rules

The slide rule , or slipstick , [1] is a mechanical analog computer. The slide rule is used mainly for multiplication and division , and also for “scientific” functions such as roots , logarithms and trigonometry , but usually not for addition or subtraction. There are many different styles of slide rules. They are usually linear or circular.

My collection of K&E slide rules. special thanks to Ed Chamberlain for his excellent set of K&E dating curves based on K&E serial numbers.

I have a fascination with older calculating devices, especially HP calculators and slide rules from various makers. And, so, I spend my book and article earnings on buying them. Back when I were a lad taking O-levels in England at the tender age of 16, you were allowed to take in slide rules into the exams. In fact, if I recall correctly, you had to have one for the Maths O-level since there were some questions that needed you to use it to get the answer.

I had a fairly cheap Blundell-Harling for my exams, but it was a duplex — that is, it had scales on both sides — so I felt like I was the man. In reality I wasn’t, since the only operations you had to do were multiplication and division, but the ‘tude is everything. This was in , which is the interesting tipping point for portable calculating devices. That year, Hewlett-Packard released their HP 35 calculator, the first really portable scientific electronic calculator.

Keuffel & Esser 4088-3 Polyphase Duplex Slide Rule

Alro chemie showing atomic masses from j. Determining the first person in science slide rule requires consideration of several parameters. The interesting questions with case.

The Charpentier is a beautiful example of a circular slide rule dating from G. Charpentier Brevete S.G.D.G Keuffel & Esser Round Slide Rule Calculator.

Note: Ahrend celebrated years in , and was given permission to carry the predicate ‘Koninklijk’ Royal. The company established the Jacobus Ahrend Fund in in his honor. Jacobus Ahrend – Netherlands. Founder of The N. He first started an office stationery shop at Singel 24 in Amsterdam, under his mother’s name. A tricycle was his first truck. Ahrend soon expanded the range of goods carried to include drawing tables, drawing requisites, collotype machines a precursor of the photocopier and water levels.

In the s, Ahrend started to sell office furniture and soon saw a rapid increase in the numbers sold. The initial furniture was all made of wood, but it was not long before steel furniture was added to the range.

Archive Record

Charpentier Calculator – Calculimetre G. Calculimetre G. Charpentier obverse Brevete S. G circa The Charpentier is a beautiful example of a circular slide rule dating from approximately The forked pointer is fixed to the brass ring via rivets and thus also rotates with the cursor arm.

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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. Stroboscopic Disc. Thanks to Neil Blaho for the donation looks a little like the Starfleet Command logo. Tel-Instrument Electronics Corp.

Mechanical Calculators

Click for Another Pic! Trig scales degrees, minutes. Sewed leather case. Trig scales degrees, decimals. Trig scales inches, seconds, degrees.

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Bob’s Calculators and Slide Rules. Search this site. Caclulated Industries. Hewlett Packard. Radio Shack. Texas Instruments.

The joy of slide rules