(US4726779-A)      Galvanic primary cell with a thickneed alkaline electrolyte has an inner space for a pasty Zn powder negative electrode. There is also an outer ring-shaped cylinder of Mn dioxide or Ag oxide forming a positive electrode and an interposed separator. In the improvement a hollow displacement body is in the inner space so that the Zn powder is radially pressed against the positive electrode.    ADVANTAGE -   Loss of contact due to decomposition or segregation of the Zn electrolyte gel is eliminated.    (EP212180-B1)      Galvanic primary element which has alkaline electrolyte, which contains, in a cup-shaped metal housing in a concentric arrangement, an inner negative electrode of zinc powder made into a paste and an outer manganese oxide or silver oxide electrode in the form of an annular cylinder with an interposed separator, and which has arranged centrally in the housing a sleeve of a displacement body, this sleeve bearing against the zinc powder made into a paste, characterised in that the negative collector is a metal pin passing through a sealing body (8), in that the sleeve (10) of the displacement body is secured to the metal pin (9) and is of alkali-resistant plastics which holds the zinc powder (7) of the anode, which floats in the thickened electrolyte, pressed radially against the separator surface (4,5) in that the wall of the hollow body is provided with cutouts through which electrolyte can penetrate, but through which zinc paste is greatly impeded from penetrating, into the hollow space, and in that the anode space has a collection space for evolving gas.    (DE3686618-G)      The cell contains a thickened alkaline electrolyte, an inner electrode of Zn-powder contained in a paste and an outer electrode of MnO2 or Ag2O pressed in the form of a hollow cylinder. The Zn-paste is forced into the form of a concentric layer adjacent to the cathode-layer (3) by the presence of a displacement part attached to the anode-conductor.    The shape of the displacer is adapted to the construction of the cell. It contains holes and slits to allow the electrolyte to contact both the central anode-pin (9) and the Zn-paste. The holes are small enough to prevent the Zn-paste from penetrating to the central chamber. The displacer is made of plastic, metal or metallised plastic.    USE/ADVANTAGE -   The position and shape of the Zn-paste electrode can be forced and retained into the optimal one for consistent and efficient operation.