(WO9508710-A1)      The activator is designed, so that by a reversible electrochemical reaction cycle in a gas chamber, resulting from the application of a DC current, a pressure build up or a pressure redn. is effectively converted into a movement.    A mechanically operated electric switch is provided, the operating organ of which, is arranged in the movement path of an adjusting element. Such that it interrupts the connection line to the DC source, with the reaching of a specified end position of the adjusting element.    ADVANTAGE -   Excessive gas development is prevented, so that activator maintains its operating ability.    (EP670962-A1)      The activator is designed, so that by a reversible electrochemical reaction cycle in a gas chamber, resulting from the application of a DC current, a pressure build up or a pressure redn. is effectively converted into a movement.    A mechanically operated electric switch is provided, the operating organ of which, is arranged in the movement path of an adjusting element. Such that it interrupts the connection line to the DC source, with the reaching of a specified end position of the adjusting element.    ADVANTAGE -   Excessive gas development is prevented, so that activator maintains its operating ability.    (EP670962-B1)      An electrochemical actor having a closed gas chamber and a number of stacked electrochemical cells each of which contains a solid electrode made of an electrochemically reversibly oxidisable substance and a gas-evolving or gas-consuming companion electrode, a pressure increase or pressure decrease which is convertible into a movement being effected by a DC-produced electrochemical reaction process in the gas chamber, the gas pressure acting on a control member, characterised by a mechanically operated electric switch having a contact spring (14) which is secured to the base (2) of a casing (1) receiving the cells (7) and which is conductively connected to the bottom cell (7'') and which engages by way of its contact head (15) with the electrically conductive control member (4) connected to the circuit, the movement of the contact spring (14) being limited by an abutment surface (16) on the casing base (2).    (JP8501859-W)      The activator is designed, so that by a reversible electrochemical reaction cycle in a gas chamber, resulting from the application of a DC current, a pressure build up or a pressure redn. is effectively converted into a movement.    A mechanically operated electric switch is provided, the operating organ of which, is arranged in the movement path of an adjusting element. Such that it interrupts the connection line to the DC source, with the reaching of a specified end position of the adjusting element.    ADVANTAGE -   Excessive gas development is prevented, so that activator maintains its operating ability.