RELAIS ELECTRIQUE STATIQUE A COMPOSITION PYROTECHNIQUE

摘要

A static relay comprising a box containing two spaced metallic electrodes which are electrically isolated from one another. A first pyrotechnical composition is disposed between the electrodes and a second pyrotechnical composition is contained in the box separate from the first pyrotechnical composition. An energizing filament is in contact with the second pyrotechnical composition to effect initiation thereof upon application of an electrical signal to the filament. The first composition is so disposed in the box with respect to the second composition as to be initiated by the reaction thereof, the first composition being constituted of a pulverulent mixture of a metal oxide and a metalloid reducer so as to form a molten conductive body of the reduced metal under the heat released by the reaction of the first composition, which molten body effects welding of the metallic electrodes together. In one embodiment, the first pyrotechnical composition serves by itself as an insulator between the electrodes and in a second embodiment a ring is interposed between the electrodes to form with one electrode a chamber in which the first pyrotechnical composition is confined and a thin layer of air with the second electrode.