Editing Gustaf Dalén (section)

==Career with AGA==
In 1906 Dalén became chief engineer at the Gas Accumulator Company (manufacturer and distributor of acetylene) and in 1909 when AGA was founded, he was appointed the managing director for the company. During his life, AGA was one of the most innovative companies in Sweden and produced a large variety of products that grew every year. Finally in the early 1970s AGA was forced to reduce the number of markets it was involved in and concentrate on the production of gases for industrial use.

In 1909 he ascended to the position of managing director of the renamed company Svenska Aktiebolaget Gasaccumulator (AGA). AGA developed lighthouses using Dalén's products. In 1910 the company bought a large real estate in [[Lidingö Municipality|Lidingö]] and built a production plant that was completed around 1912, when they moved out from the facilities in Stockholm.

===Dalén light===
[[File:Stockholm Sweden Blockhusudden-lighthouse-01.jpg|thumb|250px|right|The AGA lighthouse "Blockhusudden" close to Stockholm, initially set up in 1912. When the lighthouse was electrified in 1980 it was determined that the sun valve had been working continuously since 1912 without the need for an overhaul.]]

Initially Dalén worked with [[acetylene]] ([[IUPAC]]: [[ethyne]]), a flammable and sometimes  explosive [[hydrocarbon]] gas. Dalén invented [[Agamassan]] (Aga), a [[Substrate (materials science)|substrate]] used to absorb the gas allowing safe storage and hence commercial exploitation.

Acetylene produced an ultra-bright white light which superseded the less bright [[Liquefied petroleum gas|LPG]] as the fuel of choice for lighthouse illumination.

Dalén exploited the new fuel, developing the [[Dalén light]] which incorporated another invention, the [[sun valve]]. This device allowed the light to operate only at night, conserving fuel, and extending their service life to over a year.

The 'Dalen Flasher' was a device that, except for a small pilot light, only consumed gas during the flash stage. This reduced gas consumption by more than 90%. The AGA lighthouse equipment worked without any type of electric supply and was thus extremely reliable.

To a rugged coastal area like [[Scandinavia]], his mass-produced, robust, minimal maintenance buoys were a significant boon to safety and livelihood. AGA Lighthouses covered the entire [[Panama Canal]].

===AGA cooker===
In 1922 he patented his invention of the [[AGA cooker]]. Most of the testing for the cooker was made in his private kitchen in his Villa Ekbacken that was built when AGA moved to Lidingö in 1912 but that he never actually had a chance to see with his own eyes{{clarify|date=January 2024|reason=What did Dalén never see?}}. His family helped him with the development work, checking temperatures, airflow etc., as the development work proceeded.