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Lamps => Vintage & Antique => Topic started by: Olav on July 01, 2023, 04:11:19 AM

Title: short presentation of an "OSIRA" lamp in the magazine "BUILDING"
Post by: Olav on July 01, 2023, 04:11:19 AM

I found a short article with the presentation of an "OSIRA" lamp in the magazine "BUILDING" from 1938.

(https://www.lighting-gallery.net/proxy.php?request=http%3A%2F%2Fwww.bremsenbude.de%2Fleuchten%2FBUILDING_1_January_24_1938_page_181.jpg&hash=c07d4067ab138f4a3ef7fcf9c5e48df81e012d3c)
Source: BUILDING, N° 1, January 24, 1938


(https://www.lighting-gallery.net/proxy.php?request=http%3A%2F%2Fwww.bremsenbude.de%2Fleuchten%2FBUILDING_1_January_24_1938_page_183.jpg&hash=7141ed67b9a4780bd7fcd54594b43c1d72bd1839)
Source: BUILDING, N° 1, January 24, 1938

I wondered if that was the first type of lamp MAF/V 400. Was it only later that the isothermal outer bulb shape was chosen?

Title: Re: short presentation of an "OSIRA" lamp in the magazine "BUILDING"
Post by: James on July 03, 2023, 04:45:00 PM

Thank you Olav.
My understanding is that the BT-165 isothermal type was introduced first.  As the article describes, this presented mechanical and optical challenges in luminaires that could not accept such a large lamp.  So the TT-120 cylindrical bulb was later introduced to partially overcome those problems.