Abstract: A crash helmet for use by motorcycle drivers or riders has a rigid shell; a first flexible acoustic tube a first section of which extends into and has a bell horn in the region of the mouth-protecting part of the shell, and a second section extending from the shell through the opening in the neck-surrounding part of the shell; a second flexible acoustic tube a first section of which extends into and has a sound-intensifying terminal portion in the region of an ear-protecting part of the shell, and a second section extending outwardly through the aforementioned opening of the shell; first and second additional flexible acoustic tubes respectively corresponding to the second and first tubes and having first sections installed in the shell of a second crash helmet; and a quick-release coupling respectively connecting the second sections of the first and second tubes with the second sections of the second and first additional tubes.

Abstract: A safe for storage of paper money has a reinforced housing for several upright containers each having a row of superimposed drawers for reception of stacks of paper money. Bills of different denominations are stored in different containers, and the open sides of drawers in each container can be exposed or concealed by discrete closures which are movable up to expose a larger number of respective drawers or down to conceal one or more additional drawers in the respective containers. Each closure is normally locked in the selected position against movement in a direction to expose additional drawers, and such locking action can be interrupted only by depressing a pushbutton which actuates a clock so that the latter releases the respective locking device with a preselected delay. Once the selected interval of time has elapsed, the corresponding closure can be lifted by a step so as to expose a single additional drawer of the respective container.

Abstract: A filter element for use as a mouthpiece for filter cigarettes, cigarillos or cigars has an inner tubular wall with lugs which are bent inwardly from the material of the inner wall, and an outer tubular wall which seals the outer ends of openings which develop as a result of formation and bending of the lugs. The lugs and the two walls constitute a labyrinth for tobacco smoke, and the filtering action of the filter element can be enhanced by coating or impregnating the lugs and/or the inner wall with suitable chemicals which absorb or neutralize tar, nicotine and/or other deleterious ingredients of tobacco smoke. The filter element is made of a one-piece continuous paper web which is formed with lugs in a region adjacent to one of its marginal portions, which is thereupon folded over itself to form two layers, and which is thereupon converted into a continuous rod ready to be subdivided into filter elements of desired length.