Acetylene generator, 1911.
© Science Museum / Science & Society Picture Library
Sectioned. Made by Mesrs Brown Brothers Ltd of London, this generator could keep a single 20-litre burner supplied for four hours. It is a 'diving-bell' type of automatic generator in which the calcium carbide is carried in a central chamber that dips into the outer chamber containing water. The acetylene gas produced was burned to provide the illumination in a car's headlamps.