WERN INTER AB
MECHANICAL HVAC CONSULTING ENGINEERING. DESIGN & INSPECTION: Water, Cooling, Piping, Heating, Ventilation, Air Conditioning, Automatic Control. Slide Rule Engineering Design
Decimal Point Slide Rule Calculator IWA1633 & 1638.
P-Phone Control AB
PeriProx Control Solutions.
WERN Inter AB started 1963 in Sweden as the HVAC consulting engineering company Wern
Inter VVS AB. It was founded by Carl R. Wern, a Registered Professional Mechanical Engineer in
the state of Michigan, USA. Carl´s brother George joined in 1964 the company. Its present name
was registered 1984.
The company has been engaged in various engineering design projects such as
- Apartment, Hotel, Shopping, Office and Recreational buildings etc
- Swedish Embassy buildings in Europe, Africa, Asia and North America
- Slide rule design awarded with gold medal to the Wern brothers
- Slide rule calculator design and production for various clients
- Touch control for lighting installations patented in 1972
- Patent licence for picture telephony on an ordinary subscriber line, sold 1976 to Ericsson.
P-Phone Control AB (PPC) was founded 1992 by Carl together with his brother George in a
joint venture agreement with their brother Lars who is a registered European Patent Attorney.
PPC is specialized in proximity sensing R&D where a sensor device was patented 1972 by
the Wern brothers in a digital version following analog versions inspired by Nikola Tesla.
A first patent of interests to mention was registered 1928 in the USA by the Soviet inventor
Léon Theremin. He developed an electronic musical instrument controlled without physical contact.
The Wern brothers proximity sensor was first used in lighting installations for touch control and
thereafter in art museums as invisible shields preventing exhibited objects from being touched.
Today called PeriProx, the technology has been shown applicable for providing enhanced security
in 2000 to a Saab car and in 2009 to a Scania truck.
Slide Rule Reference
Oughtred Society, Roseville, California. USA. www.oughtred.org
International Slide Rule Musum, Denver Colorado, USA. www.sliderulemuseum.com
National Museum of American History. http://americanhistory.si.edu/collections/object-groups/slide-rules
System Wern Slide Rule IWA 1633 & 1638. Gold medal award at the International Exhibition in Brussels 1966.
Note: IWA1638. Pat.Pend. has a black washer in the slide rule center with Manual 1 and Manual 2/Except Example #28 & #29.
IWA1638. Patended has a red washer in the slide rule center with Manual 2.
1966.IWA1633 DYNAMIC ART IWA1638 2016.IWA1638
1972. Metric System. 170x240 mm 1975. Technical system. 90x120 mm 1981.Water, Steam & Air. 90 x 120 mm
Manufactured by IWA, W. Germany. Manufactured by INPLASTOR, Sweden. Manufactured by INPLASTOR, Sweden.
HVAC Mechanical Prototype Calculators
Water - Heating - Ventilation. Prototypes to be shown later.
MECHANICAL DESIGN PROJECTS, Tables and Diagram Åhléns City.
More to be shown later.
1946. Hermods Correspondence Institute, Malmö: Mathematics, Building Design Construction, etc.
1949. Stockholm Technical Institute, Sweden: Swedish HVAC Engineering Degree.
1983. Registered Professional Engineer in Minnesota, USA.
Copyright Carl R. Wern