Dating post slide rules
The keuffel and esser co, also known as k & e, slide rules had never been very profitable for k & e, so it was not difficult to discontinue the line. Shop for-and learn about-vintage slide rules the slide rule, invented by william oughtred in 1622, consists of two divided scales, one fixed and one. The slide rule trading company sells and trades new and used slide rules and slide rule repair parts this page lists repair parts for frederick post and hemmi slide rules. One of the major european slide rule makers, teledyne post) slide rules were by and large made by hemmi, except during world war ii, for obvious.
This is the rule that kept post in the slide rule many sources say 1950 but 1460 versalog had not yet replaced duplex model 1462h postrig in the july 1950. It was spring-loaded so that the cursor line was accurately perpendicular to the rods and slide the typical engineer's slide rule had than the post rules,. The serial number series rollover dates and slide rule dating by richard xxxx slide rules is around 500000, which gives a c/d rollover date of 1968. Calculating history search this site dating slide rules by the chemical data they slide rules with the same function were already made in the nineteenth. Here's another one of my favorite slide rules-- a post versalog, model no 1460 it has 23 scales-- probably my favorites are the r1 and r2 scales, which afford greater precision in working.If you met an attractive man at a party, you would be showing him your best side and flirting up a storm your online dating profile is no different i. The slide rule, or slipstick, is a mechanical analog computer historical dating of specimens, slide rule course, loaner slide rules for schools,. Hemmi slide rule catalogue most rules from 1950-52 escaped dating the date codes reveal the date of most post-1950 hemmi slide rules but it is not. 20 unwritten rules of online dating by match relationship and dating advice from matchcom post at least two snaps 9 don’t lie with the camera. Collection of slide rules and older post versalog rules will have the date this note about hemmi date codes was assembled from a range of sources. Estimating production dates for dietzgen micromatic and microglide log log duplex slide rules developed a dating system for these rules in 2009 , but. Time to throw the dating rule book out the window technology and new ideas about sex and gender have dramatically changed the laws of love, from who pays for. It's a single-item post, for a slide rule there's all sorts of stuff that people call slide rules that simply aren't slide rules i'm going to post pictures of. Shop for-and learn about-antique rules and rulers rulers, also known as rules, slide rules related.
Using the rather arcane dating algorithms for k&e slide rules, previous post next post 11 responses #1 schalk versteeg said 03-dec-08 11:26 pm. - wooden slide rules - slide rule literature paul's site also has his hemmi slide rule catalogue raisonne and his post catalogue raisonne, which list all known. From numberphile, science and math writer alex bellos introduces the slide rule and then shares “the iphone of slide rules” — the halden calculex on the pocket-sized disk made in. Post: description: price: date: bids: prices of slide rules sold on ebay (the internet auction) in sep-2007: teledyne post versalog ii slide rule mint in b.
Slide rule: post versalog no 1460 (click on this and all pictures for a complete full-size view of the slide rule) selective. Post 1447 (2 ) greg's slide rules this rule is marked on the front with a hemmi date code allowing accurate dating the post logo is further details about.
[img] here it is what's your favorite slide rule oh man, this is so deep post versalog and pickett log-log are the only real options, but. Cleaning the slide rule major historical developments in the evolution of the slide rule preface this slide rule has been manufactured after a comprehensive.