Are Old Slide Rules Worth Anything
5. I didn`t identify any rules made by “Vintage” or “Unique” because the word so often appears as an adjective to other rules. My website is now more of a virtual museum as people give me scans of their collections of slide rules that I miss so I can document them. In some cases, people send me their slide rules to add to the museum as a monument to their parents or grandparents. It is the world`s largest online slide rules museum and receives about 30,000 daily visits from around the world. And manuals are often downloaded. Interestingly, one of the most downloaded files is a slide rules manual written in Russian Cyrillic. The face shows the electronic scales of the IWA 0272. It is a duplex pocket slider with 20 cm ladders, but offers many features. (The other face has typical mathematical functions.) The sled is a strip of plastic wedged between two riveted faces; This design allows for additional slide scales to be displayed, but they give a rather rigid feel. The rule uses a good use of limited colors and the scales are presented neatly like a pocket rocket! IWA always imposes special rules. Konshak: Almost all slide rules or circular slide rules had logarithmic scales, they were used as calculators for mathematics.
There are other types of slide rules that have been made of cardboard or made for special purposes such as textile work, such things. But they don`t interest me much. I focus more on those that were actually used to teach mathematics, including the math teaching sliders that were used in the 1970s. In physics and math classes, they usually had a demonstration rake slider at the top of the class – a very large one – that the teacher manipulated to show students how to calculate a particular answer. Interview with Mike Konshak, collector of vintage slide rules, Collectors Weekly, November 2008. A fascinating interview for this magazine by Maribeth Keane. Mike Konshak founded the website of the International Slide Rule Museum. Websites / Download Resources The Oughtred Society “Dedicated to the preservation and history of slide rules and other computing instruments”.
This website has a wealth of own resources, including the manual above, a tutorial on how to use slide rules, and also access to older articles in their journal. Your own links page is also carefully categorized and is a good starting point for exploring the many online resources, including online museums, sellers of new old holdings, and the slide rules used. Well, one student, Mike, was very reluctant to learn how to use a slide ruler. “Richard, we have calculators these days, and no one uses slide rules anymore!” It lacked numerical analysis, visual functional relationships, decimal tracking, etc. But he really didn`t want to learn the slide rules. Then, six weeks before the semester, he said, “I`m applying for graduate school and I`m wondering if you`d write me a recommendation.” Oh yes, now I had my opening. “Of course, Mike, and you know you`re doing research in graduate school. Why don`t you show me that you can do some research? What happens in the much-vaunted calculator when you press the Arctan button? “Slippage rule, isn`t it? Mike replied with renewed enthusiasm for this old technology. “No, calculator. What algorithm does it run? Perhaps familiarity in use will find greater appreciation and it is a fascinating collector`s item, but I prefer to use a linear rule where full scales are immediately visible.
Extended scales may require a “hunt” to define a certain value, and they don`t think that the one-handed rotation action to set a precise value is as ergonomic as the linear ruler, where it is possible for both hands to work in opposition and keep their hands away from the scale. The “K” model shown is also only capable of multiplication and division with respect to the linear rules of multifunction. The authors noted that the extended scale does not consistently give a significant additional number compared to the typical linear rule of 25 cm. Pocketability The 25 cm scale was used in typical “full-size” models, but a variety of small-scale models were available for the pocket. The German model Reiss 3212 below has a typical scale of 12.5 cm, which has a basic set of functions, but some models have many functions stuffed into the format, for example, the electronic ruler below. I don`t know if it gained momentum elsewhere, but many American models (both pocket and 25 cm) were available in leather cases for the beltThe analogy with the Wild West did not escape the attention of commentators at the height of the slide rule, perhaps for competing engineers tackling a tricky problem! See Dan Winters` charming article in Discover Magazine, “The First Nerd Tool.” Examples of models from the early 70s Four typical models, ranging from a basic example to the most advanced example from the 70s, are presented below. The standard slide ruler used uses scales 25 cm (about 10 inches) long, the upper ruler extends the scale. Their relative sizes and weights can vary greatly depending on the style of the model, materials and the number of scales. The last one is half the weight of the first example. Russian pocket watch style slide ruler KL-1. Total diameter 5 cm. There are wooden scales on one side and trig.
scales on the back so that the more general functions of a slide ruler can be performed. A knob rotates the dial to the wooden side relative to a small fixed hand (aligned just below the left button with “1”). The other button rotates the red needle. They are regularly available on eBay, this one was purchased in Ukraine for £14 with the original packaging and Russian instructions (dated 1969). (English guides are available online, they are easy to use.) I wear my 6″ AMP (Amphenol) presentation Blundell 603 Darmstadt all the time, in its original leather bag. I still have my faber Castell 10″ originally beaten at home. It`s worthless because the slider was broken a long time ago, but it has a lot of sentimental value for me.
It is not uncommon for a divorce decree to grant separated spouses the personal property in their possession. If there are important things you leave with your spouse during the separation, you should indicate in your separation agreement that these…Continue Reading
Legal basement apartments in Toronto are governed by Chapter 150 of Toronto Zoning By-law 569-2013. Basement apartments are becoming increasingly popular in Ontario. For the landlord, a basement apartment represents an opportunity to earn a little more money, pay off…Continue Reading
Ghiselli and Johnson`s empirical evidence suggests that the level of independence that managers possess in flat organizations due to the flat organizational structure meets many of their needs in terms of autonomy and self-realization.  The idea behind horizontal organizations…Continue Reading
The most common legal structures for companies are sole proprietorship, partnership, LLC (limited liability company), company, and corporation, but there are other options as well. To qualify as an S company, your business must meet the following requirements: It is…Continue Reading
The policy is usually on a completed or reportable value form, and that`s because there is no tangible form or contract to fill out. An individual, group of individuals or company with a financial interest or interest in the construction…Continue Reading
Landlords, on the other hand, generally prefer long-term leases because they can expect a longer stream of regular rent payments. This projected stability reduces their risk as owners. Landlords also typically offer cheaper rates to tenants who sign long-term leases.…Continue Reading
WIN Learning`s solutions will address the education and training needs of school districts, community colleges, adult education programs, corrections, workforce development, and business and industry organizations to ensure all learners and job seekers have the skills they need to succeed…Continue Reading
But what about proof of value (PoV)? Are your suppliers talking about PoV and what it means for your business? Find out where people are talking about the things your business cares about, then jump into the conversation. Talk to…Continue Reading
In 1913, the Sixteenth Amendment to the United States Constitution was ratified. It states: "Congress has the power to levy and levy taxes on income, regardless of the source, without apportionment by state and without regard to a census or…Continue Reading