• 455 Martinson, Los Angeles
  • 8 (043) 567 - 89 - 30
  • support@email.com
  • Lawrence Antenna (classified in WWII)
  • Makeba Kombinator pencil & slide rule
  • Rare Carbic-made Fischer Calculator
  • For calculating in Twaddells !!
  • PTT rule for Cable Radio (Signal Loss/dB)
  • Smallest drum (≈ 2.4m) made by LOGA
  • F-C Laukhuff Organ Pipes/System-Rensch

A man must have a hobby….

hobby

This non-commercial website was a 60th birthday present from Ros. The name stems from another family member - our daughter Siân. As a teenager she often told her friends: “Oh, he collects expensive sticks of wood!”

When the latest PC/tablet is out-of-date in 6 months it may come as a surprise that the Englishman in the image, the Rev. William Oughtred (1575-1660), invented a calculator around 1621 that would be in continual daily use for nigh on the next 400 years. My hobby is collecting and writing about this analogue calculating wonder - the SLIDE RULE.

This site is a “display cabinet” for my collection (as it gets uploaded) and a “bookshelf” for my stories - enjoy browsing.

The history - how it all began ....

history

To learn more about the history of this remarkable calculating wonder check out the Oughtred SocietySlide Rule History” or my 2-page summary (in Dutch!).

Anyone needing a “memory jogger” or is just intrigued how such analogue calculators of the past worked, the International Slide Rule Museum has a richly illustrated “How to use …” guide. After that try doing a few trial calculations with Derek Ross’ online simulation of a Pickett N909-ES slide rule.

Educators looking for related inspiration & teaching aids/material need look no further than Nicola Marras’ website. But if just looking for reference books try one of these: MyList 1 or MyList 2 .

Latest additions

newadd

Slide Rules

LFAI - Leningrad, (NoName), Desktop Rietz, L, Closed frame, wood/celluloid veneers

Tech Papers

Wrong Way Up !

Gazette Colin Barnes Memorial Issue 2016

news - So far 602 rules are loaded from my collection

news
18 March 2017

NEWLY LOADED – the highlights

Before launching the New Look for the website a series of novel and rare models from UK maker UNIQUE were added.

11 March 2017

NEW “FULL SCREEN” LOOK

Site remodelled to make it “technology neutral”. It should display optimally on any type of h/w device (incl. tablets & smartphones) or browser. The restyled search options should work faster & be more intuitive to use.

Please tell me what you think ....

02 February 2017

CLASSIFIED !!

Recently uploaded, the only slide rule conceived so vital to the WWII effort that the UK & US governments had it classified.

25 January 2017

Unexpected Post!

Many thanks to whoever anonymously sent me a pocket ”SpeedyReady Reckoner from the UK (postmarked: South Midlands).

17 January 2017

New Year, new opportunities

Rod Lovett’s search engines are unmissable tools. Have you tried the two new options added late last year: (i) Long Scale Rules & (ii) Hyperbolic Archive ?

28 October 2016

Have I Got News For You!

The UKSRC Slide Rule Gazette was the guest publication on British television’s highly acclaimed weekly satirical comical news quizz HIGNFY - see the You Tube clip.

21 September 2016

IM2016 - “Splendido!”

The International Meeting in Trento, Italy was memorable - download all the Papers or watch the presentations.

The IM2017 will be held in Germany.

Bis September in Bonn.

My wish list

wishlist
Sought after slide rules still missing from the collection:
MakerModel(s)
A.W. Faber-Castell4/60, 4/92, 8/13, 8/14, 8/15 and 8/168
Blundell Harling Ltd. (BH)P4463 Holophane Illuminance Calculator
Dargue Brothers Ltd / SimplonSimplon SD10 Duplex
Engineering Instruments Inc.Either “vinylite” circular models
Fearns CalculatorsBarber Shop Harmony Calculator
Festus Mfg. Co. / Acu-Rule Mfg. Co.100
InglisFLASH: Pricing, Photographic Exposure, Stock Exchange, Foreign Money, Paper Trades & Health Insurance
IWA15489 Harmonik
L&C Hardtmuth / Classic10" Series III
Lawrence Engineering ServicesS-M (C.V. Ore) & Exposure (MIT)
NestlerCursor (runner) for 342 (50cm) & 24b (100cm)
Slide Rule and Scale Engineering Co.- any -
UniqueNorman, Perfectus, Dial, Pioneer Long Scale & Junior