Starting the compressor. Compressed air is used to start the diesel engine. From its first trial run in 1933 and some 30 years ahead, the H.C. Ørsted...

This metal lathe is an old, but very reliable, piece of mechanical machinery. It is thought to have been installed in the production line at the Pythagoras-Drott...

Sound from exhaust pipe recorded outside factory. This large diesel-driven hot bulb engine was built and installed at the Pythagoras-Drott mechanical...

Engine stopping. This large diesel-driven hot bulb engine was built and installed at the Pythagoras-Drott mechanical works in 1932. It has been used...

Close up recording of the engine. This large diesel-driven hot bulb engine was built and installed at the Pythagoras-Drott mechanical works in 1932. It...

Recorded with close mic. This air compressor, built by the Atlas company in Stockholm, resides next to a power generator, driven by a large hot bulb...

This air compressor, built by the Atlas company in Stockholm, resides next to a power generator, driven by a large hot bulb engine. The machinery in this...

Pythagoras-Drott’s main line of production in the early 20th century was hot bulb engines. One machine, crucial for the production of these engines,...

Pythagoras-Drott’s main line of production in the early 20th century was hot bulb engines. One machine, crucial for the production of these engines,...

Pythagoras-Drott’s main line of production in the early 20th century was hot bulb engines. One machine, crucial for the production of these engines,...

Work with sounds were lucky enough to record this beautiful, Swedish made, hot bulb engine on its one hundredth birthday! The event was thoroughly celebrated...

Work with sounds were lucky enough to record this beautiful, Swedish made, hot bulb engine on its one hundredth birthday! The event was thoroughly celebrated...