Automatic Lighthouse Control
Reduces fuel use by activating navigation lights only during darkness.
Historical biography archive · Updated 2026-11-03
Nils Gustaf Dalen Biography and Timeline
Follow Nils Gustaf Dalen through 2 dated historical records for Sweden.
Nils Gustaf Dalen, historical timeline
A chronological timeline drawn from matching World History Database records.
2Distinct records
1 of 1Page
1907–1907Years on this page
1907
Sun Valve
Develops a light-sensitive valve controlling lighthouse illumination automatically.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.