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The Nobel Prize in Physics 1912
Gustaf Dalén

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Gustaf Dalén - Facts

Nils Gustaf Dalén

Nils Gustaf Dalén

Born: 30 November 1869, Stenstorp, Sweden

Died: 9 December 1937, Stockholm, Sweden

Affiliation at the time of the award: Swedish Gas-Accumulator Co., Lidingö-Stockholm, Sweden

Prize motivation: "for his invention of automatic regulators for use in conjunction with gas accumulators for illuminating lighthouses and buoys"

Field: applied mechanics, mechanics

Prize share: 1/1

Invented New Flashing Apparatus

For centuries, lighthouses have made navigation safer. During the 19th century, acetylene became the standard light source. Gustaf Dalén developed a method to flash the light in short frequencies thereby reducing gas consumption. In 1907, he invented a regulating valve based on the difference in expansion for black and white metal rods. The "solar valve" made it possible to extinguish the light during day-time.

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MLA style: "Gustaf Dalén - Facts". Nobelprize.org. Nobel Media AB 2014. Web. 29 Jul 2014. <http://www.nobelprize.org/nobel_prizes/physics/laureates/1912/dalen-facts.html>

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