View single post by Mike Kearns
 Posted: Wed Mar 11th, 2020 08:01 am
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Mike Kearns

Joined: Fri Nov 24th, 2006
1930 - 

     Photographs courtesy of the Mirin Image Archive:

Diehl-badged examples of Hueglin's Airmaster ventilatior were marketed as the "Wind-O-Vent" ventilator, as early as 1929: 

Diehl Wind-O-Vent ventilation fan example from the Andrew Block Collection:

                              Solid cast-aluminum Leinweber patented blades:

Last edited on Fri Mar 27th, 2020 05:22 am by Mike Kearns