My Slide Rule Collection

Click link to see other Sales Archive Pages on this Site. Most prices seen reflect actual sale results from this website. Prices seen span a long time and may not reflect current values. Some are selling for more, many now sell for less. On other pieces you will see no price, or a price range, with or without an explanation. The reasons for that are discussed on the FAQ page.

K+E (Keuffel & Esser) Slide Rule Model Archive

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. See also my new summary table. Many thanks to R. Feely, Nelson, Clive Kidd, and several anonymous others for new data.

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.

Sun Hemmi Slide Rules Hemmi was the largest manufacturer of slide rules, and is estimated to have sold some 15 million rules over its lifetime. These were sold under their own name Sun as well as redistributed for a large number of other companies, most notably the Frederick Post Co. Reflecting their Japanese origin, these rules were often made of bamboo with celluloid facings, which worked out very well since bamboo is naturally self-lubricating and withstands changes in temperature and humidity better than other types of wood.

Hemmi also made a number of plastic rules, which were generally of very high quality and compared well to other manufacturers. Given their extensive range of products, it is not surprising to see a number of specialized rules out there as well. Interestingly, Hemmi still exists today, but makes only hydraulic and related engineering components. According to Paul Ross and Ted Hume’s research project , by these rules reappeared with the label “Made in Occupied Japan” which was eventually dropped to “Made in Japan” around Also around this time, they started engraving 2-letter date codes on all their rules representing the year and month they were made.

The first letter corresponds to the year starting with B for and ending with Z in The second letter corresponds to the month, with A for January, B for February, etc. Although the date codes were prominently engraved and paint-filled in the early years, from the late ‘s onward they can be hard to spot as they are only lightly engraved in small letters, often near an edge. According to John Spivey’s research project on Hughes Owens, the switch from the old 17xx series nomenclature to the new xxx series took place between June and August

K&E Slide Rules: A Self Instruction Manual. [For Jetlog & Decitrig.]

Simple Multiplication uses C and D scales Example: Slide the leftmost ‘1’ on C to the cursor. Move the cursor to 3.

See K&E Specialty Slide Rule gallery for slide rules with special scales for specific industries and applications. Also see Rarities Slide Rule gallery for older or rare K&E’s not shown in this gallery.

Stumbled on this looking for something completely unrelated: I have a few slide rules including a nice small Pickett N ES, the model chosen for the Apollo missions. A are real antiques if not classics. Mine is standard c which was marketed as a ‘beginners rule’; I used mine in middle school and early high school. In the following pic I have ‘reversed’ the slide to expose the trig scales.

Bureau of Standards Circular no. Back in the day its ‘cursor’ was just a finger slider made from a note card. The rule is wooden of course. I used this rule in late high school even after the HP35 came out in , and I continued to use it in college. Picture a skinny kid in a white shirt, with a pocket protector holding about 7 pens pencils, a piece of tape around the center of a dark pair of horn-rimmed glasses When looking on TAS, many of the wooden models show mis-alignment of the slide with the body in one way or another.

I guess after 40 to 70 years of storage humidity would not be too kind. Picket is something different:

K&E Catalogs Main Page

They also made a large range of drafting and related products, and even had offices here in Montreal. Their rules featured mahogany cores with celluloid facings, and have one of the nicest “feels” among slide rules, if you know what I mean. Their high quality leather cases are also among the best, and were frequently imitated.

The Evolution of a Slide Rule – The K&E Although generally considered a beginner’s model, the K&E is actually one of my favourite slide rules. I find it a very functional and aesthetically pleasing rule, especially with all that exposed mahogany wood on the back side.

Jeremy Piper He said his sister had “simply ignored the professional guidelines and not mentioned anything about the dangers of false memories” being created in counselling sessions and he was speaking out to prevent a wave of false accusations against alleged perpetrators. Dr Kezelman told Fairfax Media it was “completely false” to suggest her own memories of childhood trauma were triggered by her psychological treatment.

Advertisement “Traumatic memory is implicit, and mainly unconscious; it manifests in the body and via behavioural re-enactments rather than words,” she said. You will now receive updates from Breaking News Alert Breaking News Alert Get the latest news and updates emailed straight to your inbox. By submitting your email you are agreeing to Fairfax Media’s terms and conditions and privacy policy. They were terrifying and it took me some time before I could even mention them to my therapist.

Dr Kezelman said the guidelines were highly ethical, “based on extensive current research and the recommendations of key clinicians into complex trauma”, and did not advocate any specific “therapy techniques”. Senior Crown prosecutor Mark Tedeschi, QC, who spoke at the launch of Dr Kezelman’s memoir Innocence Revisited in , said “experience over many years has shown that there are many victims of serious sexual assault who have had recovered memories of their abuse, just as experience has shown that soldiers who have suffered traumatic experiences in wartime have repressed and then recovered memories”.

Mr Tedeschi said he had seen “numerous cases” in the courts system of children making partial disclosures of abuse to adults to gauge their reaction and whether it was safe to reveal more.

7 Outdated Relationship Rules It’s Time to Forget About

William Ford Stanley founded his firm in , making drawing and surveying instruments and in published the first edition of his Treatise on Drawing Instruments. This became the standard work on the subject and eight editions were produced up to They became part of the Sime Darby Group c and were finally liquidated in A 10 inch, electrum bound, three tier, oak case of Stanley instruments of the highest quality, probably circa

This article is a starting point to answer that question and is composed of two parts; an historical background on K&E’s serial number philosophy by Clark, and the methods used in determining the serial number series rollover dates and slide rule dating by Richard.

The second method uses a sliding linear L scale available on some models. Addition and subtraction are performed by sliding the cursor left for subtraction or right for addition then returning the slide to 0 to read the result. Standard linear rules[ change change source ] The length of the slide rule is quoted in terms of the nominal length of the scales. Models a couple of meters long were sold to be hung in classrooms for teaching purposes.

Some high-end slide rules have magnifying cursors that make the markings easier to see. Such cursors can effectively double the accuracy of readings, permitting a inch slide rule to serve as well as a inch. Various other conveniences have been developed. Trigonometric scales are sometimes dual-labeled, in black and red, with complementary angles, the so-called “Darmstadt” style. Duplex slide rules often duplicate some of the scales on the back.

Keuffel & Esser Transits Past Sales Archive

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Dating a particular K E slide rule can free online dating in pakistan without registration a challenge. Parents and teachers met in October, February and June as a group for an hour. I cannot figure out what just happened, somali dating service, even a little.

This chart lists all “Frederick Post” brand slide rules by model number and by when they were sold. Post never manufactured their own slide rules but they were vigorous sellers of other manufacturer’s rules–some under the “Post” name and some under the original manufacturer’s name. This cross reference is concerned only with rules that were sold under the “Frederick Post” name. Model catalog numbers are in horizontal rows and dates in vertical columns.

A grey cell indicates that I don’t think Post was selling any rules with that model number that year. Click on any white or green cell to learn all I know about that particular slide rule at that particular time. I try to show the catalog entry, a scan of a specimen rule, the original manufacturer’s name and model number and anything else I found interesting.

I use the words “model number” and “catalog number” interchangeably for Frederick Post brand items. For non-Frederick-Post brand items the catalog number assigned by the Post Company has no relation to the model number used by the original manufacturer. Post catalogs rarely mention the original manufacturer’s model number. Ted Hume was coauthor of the original research back in the 20th century. Peter Holland provided all the information about Dennert and Pape and urged me to publish the results.

I apologize to the many persons who provided material but receive no credit because I have forgotten their names.

Bringing 1916 to 2016: Slide Rules

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