Release mechanism controlled thermally

摘要

The thermally controlled release mechanism comprises two relatively displaceable structural elements (100, 200) and a locking device (300) that can initially stop relative displacement between the two elements. The locking device comprises an assembly consisting of two helicoidally configured parts (310, 320), and a low melting point material (300) for stopping release of the locking mechanism. The low melting point material is located on at least one part of the interface (310/320) between the two parts connected respectively to the two structural elements (100, 200) for stopping release of the locking device (300), and consequently the structural elements, before melting of the material. The helicoidally configured parts (310, 320) comprise a part with threading and a part with tapping. A spacer (240) is inserted between one (200) of the structural elements and the locking device (300). The low melting point material (330) is preferably formed from a metal, or it can be based on paraffin or a eutectic alloy. A heating element (150) provided for melting the low melting point material is formed from a pyrotechnical material that can be formed from, e.g., Al + FeO3, or Mg +Fe2O3, or Al + CuO, or Mg + CuO. Relative rotation between the locking device (300) and one (200) of the structural elements can be avoided by a device (340, 345) comprising two superposed meshed nuts, a ball bearing or the equivalent.