Nobel Prizes and Laureates

Nobel Prizes and Laureates

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. In the 19th century, acetylene gas began to be used to light their beacons. Gustaf Dalén developed a method for emitting short flashes of light, thereby reducing gas consumption. In 1907 he invented a regulating valve based on the difference in expansion between black and white metal rods. This "solar valve" could extinguish beacons during daytime, saving more money.

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MLA style: "Gustaf Dalén - Facts". Nobel Media AB 2014. Web. 5 May 2016. <>