WERN2

WERN INTER AB

STOCKHOLM, SWEDEN.

Mechanical HVAC Consulting Engineers - Europe, Africa, Asien, USA; 1963 - 2000.

 

SLIDE RULE ENGINEERING DESIGN

Decimal Point Slide Rule Calculator IWA 1633 & IWA 1638.

Gold medal award at the International Invention Exhibition in Brussels 1966.

IWA 1633

Manual for IWA 1633

www.wern.inter.net/IWA1633Manual.pdf

IWA 1638

Manual for IWA 1638

www.wern-inter.net/

Reference

Oughtred Society, Roseville, California, USA. www.oughtred.org

International Slide Rule Museum. Denver Colorado, USA. www.sliderulemusem.com

National Museum of American History. http://americanhistory.se.edu/collections/objects-groups/sliderules

IWA 1638

IWA 1638 - Bottom View

SPECIAL CALCULATORS

DESIGNED BY WERN INTER AB FOR SOME CLIENTS BELOW.

Manufactured by: IWA, W.Germany and Inplastor, Sweden

 

AIR DUCT CALCULATOR

IWA 07133 METRIC SYSTEM

With Manual instructions.

Valve factor calculator

for water, steam and air

with Manual Instructions.

Ecomomic order size calculator

with Manual Instructions.

Stockholm, Sweden

Carl R. Wern

Conversion Factor calculator

SI and TS Technical System

With Manual Instructions.

Draftsman Instrument

A square which replace two standard squares into

one. With this square instrument you would have all angles such as 15, 30, 45 ,60, 75 and 90degrees.

NAVIGATION RULER

www.periprox.com

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