Abstract: A rotary kiln (1) is equipped with a horizontal kiln drum (3), arranged rotatable and drivable in a furnace body (2), which kiln drum is closed at the charging and delivery side by end plates (4, 5) forming central charging or delivery openings (6, 7), respectively, and which can be heated from outside via a heating chamber (15) surrounding the drum shell and admitted with heating medium. To achieve a simple and solid drum construction at a good thermic efficiency, the kiln drum (3) consists of U-sections (18) arranged side by side along the drum circumference between the end plates (4, 5), which point radially inward with their open section side, and which are interconnected longitudinally in the touching end zones (19) of the section limbs (20), and along the circumference via reinforcing elements (23), having an axial distance to each other, bridging the remaining longitudinal gaps (21) between the section webs (22).

Abstract: A sprayer spraying liquid or pulverulent substances, particularly fire-extinguishing or fire-inhibiting substances, comprises a tank adapted to hold the substance to be sprayed, a sprayhead, a rising pipe extending from said tank to said sprayhead, and a pressure vessel, which contains a gaseous fluid and communicates through a shutoff valve with the tank.

Abstract: The appliance serves to subject a human patient to artificial respiration. A cushion is adapted to be disposed under the back of the patient. A piston-cylinder actuator is carried by a fixed support. An inlet valve is connected between a source of an inhalable gas under superatmospheric pressure and said actuator and is adapted to admit inhalable gas from said source to said actuator on one side of said piston. An outlet valve is connected between said actuator and a reservoir which is adapted to expand in response to its internal pressure. Said outlet valve is adapted to release inhalable gas from said actuator on said one side of said piston into said reservoir. A conduit which incorporates a shut-off valve connects said reservoir to said respiration mask. First spring means oppose a movement of said piston under the influence of said inhalable gas admitted to said actuator from said source. Second spring means oppose the expansion of said reservoir.