Abstract: There is provided a nebulizing element suitable for nebulizing a liquid, comprising:a) oscillator means; andb) a cover sheet;the cover sheet being disposed between the oscillator means and the liquid to be nebulized in use; and having a metallic chemically inert layer which contacts the liquid to be nebulized in use, and a metallic energy transmission layer bonded thereto; characterized in that the metallic chemically inert layer and the metallic energy transmission layer are bonded to one another by a metallic bond. Nebulizer devices comprising such elements are also provided.

Abstract: Disclosed is a novel print element for a serial impact printer having a novel character set which permits the typing of text as well as chemical symbols and formulae with a small number of character elements. Closed ring structures may be formed with the character set which may be expanded to various sizes. Also disclosed is a serial impact printing system using the aforementioned printing element which automatically subscripts small numerals when the printing element is positioned without further action on the part of the typist.

Abstract: A method of making a cartridge, in particular a blank or propellant gas cartridge which has a casing of generally tubular form with a telescopically reverse in-folded star-crimp-closed integral tubular end section, and within which is contained a blank propellant powder charge, with a readily rupturable wad of low heat conductivity initial restraining mass formed between the propellant powder charge and the in-folded telescoping star-crimp-closed end of the casing, in which method the cartridge is formed by front loading a propellant charge and the low-heat-conductivity wad, and then star-crimping and telescopically reverse in-rolling the cartridge casing, after which the recessed in-rolled star-crimped casing is heat sealed.