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What's New at the SRU? CLICK to return to The Slide Rule Universe Updated September 18, 2022 Just SCROLL DOWN to see everything!

Sphere Research Corporation 3394 Sunnyside Rd. West Kelowna, BC, Canada V1Z 2V4 Phone: +1 (250) 769-1834 Please Note: All Prices are in US$ Want something? e-mail us! Our FAQ !! Visit our amazing document server.

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NIB Rules

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September 18, 2022	CLICK to SEE! Big shipment of New In the Box, MINT Pickett rule sets just arrived! N200ES, N200T, N500ES and N904T, perfect for gifts and new students.
December 23, 2021	CLICK to SEE! We just got in a nice lot of HOPE 530 Log Log 23 scale Slide Rules, great advanced rules!
August 20, 2022	CLICK to SEE! We just got in 2 NEW factory boxed Hughes-Owens Pocket Versalogs and Faber-Castell 62/83N Slide Rules, great top of the line advanced rules!
December 23, 2021	CLICK to SEE! We just got in a nice lot of HOPE 530 Log Log 23 scale Slide Rules, great advanced rules!
December 27, 2021	CLICK to SEE! We just got in a nice lot of NEW factory boxed Faber-Castell 2/83N Leather cased Novo-Biplex 30 scale Slide Rules, great top of the line advanced rules!
December 23, 2021	CLICK to SEE! We just got in a nice lot of HOPE 530 Log Log 23 scale Slide Rules, great advanced rules!
December 22, 2021	CLICK to SEE! We just got in a nice lot of K+E K-12 Prep 68-1892 Slide Rules, great student rules!
October 28, 2021	We have a rare Aristo model 101 Overhead Projection Rule! Click to see! This was the way slide rule instruction was typically done in Europe, using this type of clear functional rule, and an overhead projector.
October 28, 2021	We have a great K+E 68-1215/1210 new boxed Set. Click to see! The final wood incarnation of the famous 4081-3S rule, hard to find in a complete boxed set, an excellent gift.
October 28, 2021	We have a great Pickett N3ES boxed Set. Click to see! One of the more upscale Pickett sets, hard to find complete.
October 27, 2021	We have an uncommon Hemmi 256 Electronics set back in stock, plus a great boxed K+E Deci-lon Set. Click to see them! One of the hard to find Hemmi Electronics and Communication rules, plus a mint boxed K+E$ set, perfect for a gift.
June 28, 2021	We have great FC 2/83 sets back in stock. Click to see them! The classic high end duplex rule from FC, we have 2 sets available, and more coming soon.
June 22, 2021	Our amazing Slide Rule Coins are BACK! Click to see them! Beautiful working slide rule coins in Midnight or Daylight color schemes. These won't last long, so have a look.
December 16, 2020	Just got a rare Koh-I-Noor Tech-Log boxed Set! An uncommon complete boxed set of a beautiful high end rule!
September 22, 2020	Just got a batch of Pickett 120C-T Microline Trig rules. and an assortment. Great for students! Pickett 120C-T Trig Conversion Rules. Great for Home study!
September 16, 2020	Just got a batch of Pickett 121C-T Microline Trig Conversion rules. Great for students! Pickett 121C-T Trig Conversion Rules.
September 10, 2020	Just got a batch of Pickett 115 Basic Mth rules that can also ADD and Subtract in addition to standard rule operations. Just a few! CLICK to see! Pickett 115 Basic Math Rules.
July 27, 2020	Just got a batch of ten handy pocket rules with leather cases, CLICK to see! 517L low cost pocket rules.
April 3, 2020	Just got in the unusual Simplex Math Rule from Pickett! This can ADD, SUBTRACT and MULTIPLY/DIVIDE over 20 decades, a great early student rule that's hard to find! CLICK to SEE! Pickett Simplex Math rules.
March 26, 2020	Just got in LOTS of great POCKET RULE Sets! CLICK to SEE! Hemmi, Faber Castell, Dietzgen, POST and more.
December 12, 2019	Just got in LOTS of great cheap student rule Sets! The K+E K12-Prep student sets are really hard to find!
October 3, 2019	Just got in excellent K+E Pocket Deci-lon AND Faber Castell 67/54Rb Addiator Rule Pocket Sets! Hard to find rules always requested, now back in stock!
February 21, 2018	Just got in another batch of NEW Sterling and Accumath slide rules, great first rules for that young scientist or mathematician! Finding inexpensive new rules is a real challenge, but we found a big pile from the early 1970's so enjoy!
November 29, 2017	Our Annual FOOD BANK AUCTION is now OPEN! Have some fun, and do some good at the same time, your bids really help locally! Rare Pickett prototype rule, FC spare cursors, FC 20 inch rule, and much more!
November 20, 2017	Great Aristo Pocket Rule Holiday Sale! New boxed 803 pocket rule sets complete with leather case, perfect gifts!
November 18, 2017	Our Annual FOOD BANK AUCTION is now OPEN! Have some fun, and do some good at the same time, your bids really help locally!
October 16, 2017	Just got in a big quantity of NEW Sterlings slide rules, great holiday stocking stuffers for that young scientist or mathematician! Finding inexpensive new rules is a real challenge, but we found a big pile from the early 1970's so enjoy!
August 2, 2017	Take a look at this watch design launching on Kickstarter that incorporates a useful slide rule, and has a companion circular rule. The project runs until August 24th. Back them now and get a deal on the watch and rule. Just CLICK to VISIT! Opportunities for brand new rules come along very seldom, so if the watch or circular metal rule appeals to you, have a look at this great project. As with many Kickstarter campaigns, it's all or nothing, so if they don't hit their target, no rules will be made.
July 21, 2017	CLICK to see new 111/54A full sized Addiator Rules! Addiator rules (with a built-in adding machine on the back) are few and hard to come by. Here are two new complete sets for your computing enjoyment.
July 7, 2017	CLICK to see Post 1441, 1444K and 1461 Pocket Versalog rules! Lots of hours spent in the overhaul shop to bring you a big batch of sparkling, ready-to-use Post pocket rules, all with the lightweight bamboo body that gives long life with smooth operating action. My apologies for being behind on overhaul work, we are working through a backlog of about 200 rules, and hope to get them all ready to go and listed soon. These Post (Hemmi) pocket rules are very popular thanks to their light pocket weight and great performance, especially the 1461 Pocket Versalog..
December 29, 2016	CLICK to see Hemmi 257 Chemical rules! A rare treat, two different Hemmi 257 and 257L CHEMICAL rules. Very hard to find these, and these sets are excellent examples.
December 27, 2016	CLICK to see 20 inch rules! A rare treat, 20 inch MINT Faber-Castell rules from Ray Hems in England. We seldom get 20 inch rules, and these are simply amazing. The sets are complete with all accessories, and original factory english manuals. Don't miss these!
December 22, 2016	BIG shipment of 10 inch NEW BOXED FC, Logarex, Staedtler-Mars, Nestler and Aristo rules from Ray Hems in England. They are being posted as soon as possible, but includes 1/54, 1/98, 1/28 544A, and many more. Some very uncommon models in this batch, many we have never had before. Please see THIS PAGE as they get ADDED. Please e-mail WALTER for early details.
October 10, 2016	Our mobile-compatible site-wide re-write is underway, this will take at least a month, but should allow for much easier phone browsing. If you see any problems, or have re-write suggestions, please e-mail WALTER here.
July 31, 2016	Super School Slide Rule Packs A fantastic Logarex/Koh-I-Noor school pack with both full sized and pocket rules, and free educational books from the Oughtred Society on mini-CD. And just in time for school, WITH FREE SHIPPING! Limited deal, just 100 sets available.
January 1, 2016	FINALLY, we have BRAND NEW Leather Pocket Slide Rule Cases! It took us 5 years to find a suitable vendor, and get the cases optimized just right, finally we have beautiful, inexpensive leather pocket clip cases for your favorite pocket rules!
December 13, 2015	Over 500 NEW slide rules posted HERE And HERE. Hundreds of brand new pocket and full sized rules just arrived, all at excellent prices. WAHOO! How often does that kind of thing happen? Some great low cost stocking stuffers for your mathematically minded friends and family.
November 27, 2015	The Auction IS NOW CLOSED! Thanks to everybody that bid, these funds will go to very good use locally by our food banks. While the auction is now over, any item still sitting at the starting bids (no names), can still be bid on until monday at 9am, first bid over the starting price takes it.
November 27, 2015	The Auction ends TONIGHT, 9PM (PST) Have some fun and do some good at the same time, wahoo!
November 25, 2015	More GOODIES added to the annual Slide Rule Food Bank Auction Have a Look!! CLICK to see all the amazing auction items, including a 7 digit vintage Lightning Calculator! Ends Friday November 27th!
November 22, 2015	More GOODIES added to the annual Slide Rule Food Bank Auction Have a Look!! CLICK to see all the amazing auction items, including a Faber Castell 67/54Rb Addiator Darmstadt Rule. Ends Friday November 27th!
November 18, 2015	More GOODIES added to the annual Slide Rule Food Bank Auction Have a Look!! CLICK to see all the amazing auction items, including a Pocket Final Deci-lon and FC 4/87 20 inch rule. Ends Friday November 27th!
November 15, 2015	The annual slide rule food bank auction STARTS TODAY!! CLICK to see all the amazing auction items, ends Friday November 27th!
November 8, 2015	New Pocket + Full Sized Rules just arrived! New Aristo 0803 boxed pocket rule sets! Lots of NEW cheap pocket and full sized rules in time for Christmas! Over 150 new slide rules just added, have a look!
May 12, 2015	New Pickett 120ES boxed Student rule sets! After a YEAR LONG WAIT, we have more stock of these very popular 10 inch Student rule sets! Sparkly new Eye-Saver (ES) Yellow student rule sets!
February 15, 2015	New K+E boxed pocket rule sets! New 7 Inch Circular Datalizer Date Finders New desk-sized date finders!
December 14, 2014	New Hughes Owens 1762 (POST 1444) Pocket rules sets from (wait for it) 1955! Plus we have the incredibly rare 1957 Hemmi illustrated books to go with them!
November 21, 2014	The annual slide rule food bank auction ENDS TONIGHT, 9PM!! CLICK to see all the auction items, ends TONIGHT November 21st! More goodies added, and don't forget the SECRET action item!
November 17, 2014	The annual slide rule food back auction is now OPEN!! CLICK to see all the auction items, ends THIS FRIDAY, November 21st! Just added an ELECTRONICS Slide Rule Assortment! Have some fun and do some good all at the same time!
November 6, 2014	The annual slide rule food back auction is now OPEN!! CLICK to see all the auction items, ends November 21st! We will be adding items daily, from the amazing Pickett Bat Case N3ES to a giant assortment of Slide Charts! Have some fun and do some good all at the same time!
November 1, 2014	WOW, HUNDREDS of BRAND NEW Low Cost Rules Just in time for Christmas! CLICK to see all the new low cost rules, is this fun or what? The slide rule elves have been very busy. We got in hundreds of new rules and boxed sets, great for first rules and students. This is the first big cache of new rules we have gotten in over a year, so have a look!
June 6, 2014	NIB Pickett Sets CLICK For Many new Pickett sets! We just added all kinds of new Pickett sets! Have a look. NIB Low Cost Pickett Sets CLICK For Many new Pickett low cost Student sets! Even 115 sets that can add and subtract! Have a look. NEW Foxboro Flow Rule Set CLICK a NEW complete Foxboro Flow rule boxed set with Manual! Very rare find!
June 1, 2014	Giant Gilson Binary Circulars! CLICK For Gilson Binaries We have been out of stock for a while, here's two great sets!
April 27, 2014	NEW BOXED K+E Pocket Sets! CLICK For new boxed K+E Sets Just got in a nice selection of hard to find K+E boxed sets, great grad gifts!
January 22, 2014	EXcellent Geotec Versalog II Sets! CLICK For Geotec Versalog II Sets Just got in 5 excellent sets, with leatherette cases!
January 22, 2014	NEW Geotec Versalog II Sets! CLICK For New Geotec Versalog II Sets Just got in a few new sets, with LEATHER cases!
January 6, 2014	NEW Boxed Faber-Castell 52/81 Novo-Mentor Sets! CLICK For New Faber-Castell Sets Just got in a few 52/81 boxed sets, complete with English manuals.
January 4, 2014	NEW Boxed N200ES Pickett Sets! CLICK For New Pickett Sets Just got in a few more N200ES boxed sets, have black leather slip cases with extractors.
January 1, 2014	NEW Circular Slide Rule Sets! CLICK For New Circular Pocket Sets Hard to find SINCO Model 250 boxed sets. Very high resolution trig rules!
December 11th, 2013	NEW Pocket Slide Rule Sets! CLICK For New Pocket Sets Hard to find NEW BOXED Hemmi 34RK sets. great christmas gifts and ON SALE for the holidays!
October 5th, 2013	NEW Pocket Slide Rule Sets! CLICK For New Pocket Sets NEW Cheap Pocket Slide Rules! CLICK For New Cheap Pocket Slide Rules All kinds of new pocket slide rules from $9 to $59! Perfect Stocking Stuffers and carry rules!
September 12th, 2013	NEW Boxed Pickett Sets! CLICK New Boxed Pickett Sets We have some new N1010-T, N1010SL-ES, N200ES and N300ES sets. Just a few, but in time for school or christmas!
September 12th, 2013	HALF OFF Sale on 700T Pocket Rules! CLICK New Boxed Pickett 6700T Pocket Sets Great pocket Trig rules with leather pocket cases at a GREAT Price, perfect for Christmas treats for your slide rule friends, and they can do arial photo scaling on the flip side, for those sudden airborne photo emergencies!
November 23, 2012	More Goodies Added To The Auction! Visit the 10th Annual Food Bank Slide Rule Auction!
November 20, 2012	The Auction is OPEN! Our 10th Annual Food Bank Slide Rule Auction is NOW OPEN! Check the page often to see regular additions! Closes Friday, November 30th at 9PM PST.
November 16, 2012	MORE LOW COST TREATS! Just in, one bulk batch of new Pickett Model 80 Student rules. Our lowest cost new slide rule yet! Stock up while we have them.
July 16, 2012	SUMMER TREATS! Just in, factory boxed Picket 140T Log Log Sets! New in the box, complete with manual and case! Great higher end school sets with a powerful Log Log scale assortment. We have been out of these for a LONG TIME! Stock up for September back to school!
June 28, 2012	SUMMER TREATS! Just in, factory boxed Ricoh 105P Rules! New in the box, complete with manual and case! Great desk sets to leave out for everyday use with cm and inch rulers added to the slide rue design. Found in our wayback machine, 3 More Sets! Beautiful pocket bamboo slide rule sets!
June 11, 2012	SUMMER TREATS! Just in, another batch of ever-popular Pickett 120ES Student Rules! New in the box, complete with manual and case! Just in, 2 more Giant 20 Inch Faber 4/98 Elektro Sets! New sets, very hard to find these gigantic rules, especially in new condition!
June 2, 2012	SUMMER TREATS! Just in, New SKALA pocket rules with leather cases! Beautiful pocket rules from POLAND, first time on our site!
May 20, 2012	Just in, a NEW, BOXED Teledyne Post Versalog II! Also the matching NEW BOXED Pocket versalog II HERE!
May 20, 2012	Just in, a rare batch of NEW, BOXED K+E Full Sized Sets! We got some final inventory from a stationary store, lost for decades, just a few different sets, but YES, there's two Cooke Radio rules!!
May 20, 2012	Just in, a rare batch of NEW, BOXED K+E Pocket Sized Sets! We got some final inventory from a stationary store, lost for decades, there are some very nice pocket sets too!!
May 17, 2012	Take a huge sale discount of NEW boxed sets of Pickett N1010SLT rules that have scruffy boxes. We have one batch of them, when they are gone, that's it! Includes Manual, Warranty card, and Leather Case! Check the bottom of the page for the sale sets!

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Click to visit!	Buy a slide rule from our extensive on line marketplace, with restored classics, amazing new in the box rules, and low cost first student rules. We have something for everybody, even a swap and sell area for visitors.
Click to visit!	Learn to operate and care for your slide rule with these on line manuals and directions. Learn what scales mean, how to use them and how to restore or keep your rule in good condition.
Click to visit!	Tour our extensive archives of slide rule manufacturers and models from all over the world. Find out who made what, and what became of them after they stopped making slide rules. See how slide rules survive today in the form of slide charts still made in the millions annually.
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