The newly consolidated corporation enhances both firms’ contributions to the marketplace by providing new technologies, new products and new services to the reprographics industry. Geoerge W. Champe was born in Dublin, Indiana, and was an 1893 graduate of of the University of Indiana. Soon after graduation he became the Bloomington, Indiana City Engineer. He spent one year at the Rose Polytechnic Institute and in 1900 opened his Toledo office for private engineering practice. His arrival in Toledo coincided with a boom in the development of interurban electric railroads and he became a specialist in that field. In those years he devoted much time in pavement design and construction.
The board is not marked, nor is the original box and there is no indication it ever was. The model number is not called off, and given how early this example is the proper call out might be 1740-N. All slide rules function in the same way and basically have the same scales. Any manual, even a very basic manual will teach you how to use a slide rule. If your slide rule has more scales, like a log log rule, you will need a manual that also covers the additional scales on your slide rule.
In 1915, despite already producing 3 other stadia slide rules, K&E introduced their first stadia rule based on a duplex form factor. However, this rule had a few special tricks up its sleeve. The rule would change completely in the 1913 catalog, advertising a reversible slide with a new B scale on the back, located on the bottom of the slide. This, when used with the two decade A scale on the bottom rail gave the rule a general purpose application for multiplication, division, and proportions. For the first time with a stadia rule, this catalog pictures and describes a glass indicator.
You express your feelings to one another differently
This new 4098A version would be known simply as the “K&E Pocket Slide Rule,” no longer under the catalog heading of “Ever-There Pocket Rules.” Throughout the history of the Model 4041, a few custom http://www.matchreviewer.net versions appeared as special order rules. In 1914 or 1915, the metal-framed cursor gave way to the “frameless” all-glass indicator, first with metal rails, and then with plastic rails a year later.
I suppose it was meant to replace both the 4058 and the 4058C model, which was discontinued that year. Even so, it would disappear the very next year itself, having appeared in only the 1942 catalog. The special versions of the Beginner’s rule, Models 4059, 4058D, and 8858 Special War Time rule are all very rare, coming maybe every other year on eBay. Prices for the 4059 and 4058D are as cheap as the normal 4058 rules, likely because nobody recognizes them when they come up and aren’t truly collectible. On the other hand, the Model 8858 with its special war time packaging is more collectible, likely going for $50 to $100 if one were to come up again.
This becomes thematic of all the radio rules that K&E would produce, as described shortly. The earliest attempt at an electronic engineering slide rule by K&E is also the one in which we have the least knowledge. The Roylance is very much a blue-collar, industrial slide rule, intended for doing large-scale electrical work, from power pole to power pole.
So the procedure when working such wood is to cut pieces over-sized, wait a day or two, and then mill the wood to final dimensions after the board relaxes. Not only does this property cause extra time in milling, but it can also make the boards bind against the blade during cutting operations as the wood releases its tension through the cut. This, coupled with its extreme hardness , makes working boxwood more risky than more woodworking-friendly lumber, like mahogany. Likely imported from the French company Tavernier-Gravet, the Model 479 was K&E’s first slide rule produced from 1881 to 1886. This provides the initial framework of my writing, whereas I might conjecture about items within the broader context of what I’ve already gleaned.
A slide rule converts logarithms from digits to physical lengths on a scale. Moving the scales to add physical lengths allows the user to read the product of a multiplication problem on a corresponding scale. I now have a very nice fully functional slide rule for far less expense than if it had been sold in its present refurbished condition. I hope this Instructable will be an encouragement for those who want a good slide rule, but cannot afford one in nearly new condition, or who are frightened away from an auction for a basically sound rule with missing or damaged cursor glass. For intro books I think a search for slide rule manuals will turn up dozens of suitable results, perhaps including a manual for the very model you end up with.
Slide Rules — Linear Slide Rules
I have had one other in over 20 years of buying and selling sliderules. The one I had, like this one, came from New England which was the center of Americas’ shoe making industry back before the age of sneakers and the export of our manufacturing base put an end to that industry in the US. Although it is not marked K & E it is a known fact they made it. K & E, or Keuffel & Esser were known to make specialty rules, but I have never seen it listed in a catalog. Numerous Google searches turned up no reference to John Schmidt & Co or any reference to The New York Automatic Lightning Calculator this slide rule is referred to as on the label in the top of the box.
Scofield-Thacher Engineer’s Slide Rule
It’s logical and, for the most part, mirrors the way K&E would have organed the rules themselves. It does take some interpretation however, which we will do shortly. But for me, a good discussion about K&E slide rules would not be possible just by moving straight down the K&E Model Map, even though I will stick mostly to that organizational structure until I feel it no longer suits me. So unlike any other makers, including Pickett, Hemmi, Faber-Castell, and Aristo, Keuffel and Esser – both the slide rules and the company – sparks curiosity in me. So much so that what follows here will be a written love-affair of not only the slide rules in my collection, but information and understanding about every other slide-rule related item produced or sold at some point by K&E. I am thankful that K&E was never satisfied with the status quo, because I can collect an enormous number of meaningful slide rules without needed into pay exorbitant prices for them.
Long-Scale Rules
These models of the Ever-There series should be discussed here because they were Polyphase Mannheim pocket rules . This is very predictable in the first 50 years of K&E product catalogs. But around the 1930s, we begin to see certain models of rules sold in “series,” a collection of rules with similar build and technology, yet with a diverse range of uses. Dr. Makio Murayama, who discovered the first effective treatment for sickle cell anemia here at the NIH, rescued this cylindrical slide rule from among discards in NIH Surplus.
It is said that double that amount were manufactured, but half of them did not pass quality inspection due to errors with the painting of the rule. When you couple so few samples of the Analon with its very unique design, its something very desirable for collectors. For myself, I will remain hopeful to stumble onto a bargain somewhere. Now angular, deep-bodied, muscular, and even angry, as if it has something to say. Colored vertical lines on the ends of the slide declare, “Hold me here.” We’ve seen K&E produce innovative rules before, even giving them bold names like Deci-Trig and Jet-Log, but this shouts its name on the rule itself. Weinbach received a visit by a couple of gentleman in 1943, presumed to be from K&E (according to Weinbach’s later statements).