Membrane cell with an electrode for the production of a gas

In an electrolytic cell of the membrane type having at least two vertical electrodes comprising an anode and a cathode, a membrane between the anode and the cathode, at least one of both said anode and said cathode comprising a vertical conductive plate, said plate having a horizontal zone for connecting an electrical lead thereto, said plate having vertically extending narrow slots distributed thereon, the slots comprising vertical elongated slots, said plate having vertically disposed elongated vanes extending obliquely from an active face of said plate and disposed adjacent ones of the vertical elongated slots, each of said vanes being disposed opposite a corresponding slot substantially in parallel vertical rows, and said vertical elongated slots and said vertical vanes being disposed effectively to transfer gas from the active face of the plate to a rear side of the plate and thus avoid bubbles of gas in an anode-cathode gap between the anode and the cathode and effective to reduce composition of electrical energy during electrolysis.