The evolution of the method Vacuum led in 1844 to patent the "automatic siphons brewer" or more commonly called "Siphon Balance".
The two vessels are separated and place horizontally: the use of a glass tumbler made the process more spectacular, together with the automatic burner turning off due to the balance movement of the boiler.
Reproduction of an old Balance Siphon brewer, produced by Spiral AG Horgen, Switzerland. Gold plated, about 1970