Today, 156 years ago, on November 30, 1869 (Calendar 27 October 1869), Swedish physicist Niels Gustaf Dalen was born. Niels Gustaf Dalen was a Swedish physicist and inventor who studied applications in the field of mechanical engineering on November 30, 1869. Niels Gustaf Dalen (Nils Gustaf Dalen, November 30, 1869 ¨C December 9, 1937) was awarded the Nobel Prize in Physics in 1912 for the invention of an automatic regulator that combines functions such as the boiler, the boiler and the battery. Review: Swedish physicist, winner of the Nobel Prize in Physics in 1912