(57) An improved, mechanically actuated electrical detonator type fire suppression apparatus is provided which is particularly suited for use in marine applications or in other situations where complete dependence upon an external electrical circuit is to be avoided. Preferably, the apparatus hereof includes, in addition to the usual fire suppressant container and rupturable seal, an electrical generator coupled to the detonator and a mechanical linkage assembly coupled to the generator for selective operation of the latter. An operator handle forms a part of the linkage assembly and is shiftable so as to initiate operation of the generator with consequent charge detonation. In particularly preferred forms, a gear and spring assembly is coupled between the linkage and generator and is operable to initially store mechanical energy followed by rapid release thereof in order to generate an operating signal having the proper electrical characteristics.