(DE3337570-C)      Cell for discharge at high temp. has in a cup-shaped metal casing an inner zinc electrode and an outer silver oxide or manganese dioxide electrode, with a separator between them. The separator consists of at least two layers. The inner layer is a semipermeable ion exchange membrane. The outer is a thermally stable ceramic material. The top of the zinc electrode and the bottom of the casing are sealed by cups of plastic, pref. PTFE.    Zinc paste forms the negative electrode and is divided from the positive electrode by the separator. The layer consists of a cellophane foil between two cross-linked PE foils to act as a membrane. Layer is a ceramic paper with heat-resistant fibres. Cup seals are made of PTFE. The centre of the casing has an intentionally weak notch to confine the bursting internal pressure to 65-85 bar.    USE/ADVANTAGE -   Such a cell can be produced at a reasonable cost and has a high energy density. It has a long service and shelf life.    (US4650680-A)      A prim galvanic element dischargeable at high temp. has (A) as known an alkaline electrolyte, (B) a cup shaped metal housing contg. in concentric arrangement (C) an innermost negative Zn electrode, (D) a separator consisting of (a) an inner layer in the form of semipermeable ion exchange membrane surrounding the Zn electrode and (b) a temp resistant ceramic material outer layer surrounded by (E) an outermost positive electrode in the form of an annular cylinder. One end of the housing has a plastic bowl shaped insert covering the cross-section of the Zn electrode and the other end is enclosed by a sealing element made of a temp. stable plastic through which a negative current take off conductor passes.    The inner layer of the separator is pref. made of a low density polyethene film treated in such a way to exhibit a 3-dimensional network in its molecular chains. The outer layer is a ceramic paper formed of heat resistant Al2O3/silicate fibres or glass fibres and holds most of the electrolyte. The bowl shaped enclosure and the sealing element are made of PTFE.    ADVANTAGE -   The element can be produced more rapidly and economically than known ones; it has a high energy density, can be highly loaded and has a good shelf life. (6pp)    (EP140021-B)      A galvanic primary cell which may be discharged at high temperature with alkaline electrolytes, a negative zinc electrode, a positive silver (1) oxide or manganese dioxide electrode and having a beaker-shaped metal casing, which contains, arranged concentrically with the casing, an inner zinc electrode and an outer positive electrode in the form of a circular cylinder with a separator between them, the open end of the metal casing being sealed with a plastics seal, through which the negative current conductor prohects, characterised in that the separator is composed of at least two layers, the inner layer consisting a semi-permeable ion-exchanging membrane and the outer layer of which consists of a temperature-resistant ceramic material and in that the beaker-shaped metal casing has a bowl inset made of temperature-resistant plastics covering the transverse section of the zinc electrode. (6pp)