Jumper switch means

A jumper switch means for electrically by-passing a monopolar electrolyzer out of a plurality of monopolar electrolyzers connected in series to an electrical power source, which electrolyzers consist of individual electrolysis cells each having anodic and cathodic contact points, said jumper switch means comprising an internal circuitry and a multiplicity of extension arms for connection to the electrolyzers immediately preceding and following the electrolyzer to be by-passed, characterized in that said jumper switch means is positioned above said plurality of electrolyzers, said multiplicity of extension arms comprises first extension arms suitable for connection to the anodic contact point of each individual cell of the electrolyzer immediately preceding the electrolyzer to be by-passed, second extension arms suitable for connection to the cathodic contact point of each individual cell of the electrolyzer immediately following the electrolyzer to be by-passed, said first and second extension arms being joined to said internal circuitry to provide by-passing of the electrolyzer without a shift of electrical current in the adjacent cells of the electrolyzers immediately preceding and following the electrolyzer to be by-passed, said connections between the extension arms and the anodic and cathodic contact points being of the friction-type.