AGA Dalén Flasher with regulator, circa 1925.

Flasher and regulator with makers plates: AGA BRENTFORD ENGLAND

Height: 30.5 cm.

Pictured with coloured filters, each are sold separately to the flasher.

The Dalén Flasher is an ingenious gas-powered mechanism invented by Nobel Laureate Gustaf Dalén in 1905 for automatic lighthouse beacons. It regulates the flow of acetylene gas so the light flashes intermittently, reducing gas consumption by over 90%.

Nils Gustaf Dalén (30 November 1869 – 9 December 1937) was a Swedish engineer and inventor who received the Nobel Prize in Physics in 1912 for his invention of automatic regulators for use in conjunction with gas accumulators for illuminating lighthouses and buoys.