Moderator lamp
The oil lamp with a spring in its base that forced the oil up to the burner.
Franchot patented the moderator lamp in Paris in 1836, and it became the drawing-room lamp of the middle class until kerosene lamps arrived in the 1860s. The base was often a porcelain vase. Examples are in the Musée des Arts et Métiers and many museums of social history.
Materials: Brass, porcelain or painted tin, glass chimney and shade
Manufacture: A spring in the reservoir drove a piston downwards; a needle valve, the moderator, regulated the flow.
The key or knob on the side for winding the spring.
The tall column between the reservoir below and the flame above.