Abstract: A safe box-like structure of good appearance is formed in a simplified manner from a flat metal sheet by folding at right angles the opposite side portions of a flat rectangular metal sheet, for instance, of a steel sheet to provide a channel-shaped metal sheet, forming in each end portion of the upright side sections of the channel-shaped metal sheet a diagonal crease extending from an inner end of a prescribed vertical fold line disposed substantially perpendicular to the bottom section of the bottom section of the channel-shaped metal sheet to the outer corner point of the end portion of the side section, pressing a triangular intermediate section between the prescribed vertical fold line and the diagonal crease inwardly of the channel-shaped metal sheet, folding the triangular intermediate section and an outer triangular section toward each other along the afore-mentioned prescribed vertical fold line and diagonal crease, and upbending opposite end portions of the channel-shaped metal sheet at right angle

Abstract: An arrangement for disposing of contaminating matter floating in a fluid. A recovery-separation tank is used with an inner water surface lower than that of the outside. The floating matter, such as oil floating on the surface of water outside the recovery-separation tank, is drawn in through an inlet of the recovery-separation tank. The floating matter and the water are separated into layers which flow into the recovery-separation tank and a drain pump discharges the water lying in the lower portion of the recovery-separation tank.

Abstract: A foodstuff container capable of heating or cooling food or beverage contained therein having three compartments to accommodate food or beverage, an exothermal or endothermal reaction agent, and a reaction-inducing agent respectively, a needle member to open a way for the thermal reaction agent and the reaction-inducing agent to mix with so as to cause a thermal reaction for heating or cooling the contained food or beverage, and a bottom cover having at its center a plurality of pleats radiating therefrom, said pleats affording some elasticity and flexibility to said bottom cover, said bottom cover also projecting outward at its center so that said bottom cover can bounce back inwardly at the center upon pushing by a finger from the outside so that the bottom cover pushes the needle existing between the compartments accommodating the exothermal or endothermal reaction agent and the reaction-inducing agent respectively, so that the two agents mix to produce thermal reaction as the result.

Abstract: A single rotor, motor-generator set with motor and generator stators and one rotor turning adjacent the two stators. Preferably, the rotor is between the two stators. The rotor has a first rotor periphery facing the motor stator periphery and a second rotor periphery facing the generator stator periphery. There are driver means on the motor periphery and driven means on the rotor first periphery. Also there is a layer of permanent magnet material at least on the rotor second periphery. Furthermore, there is at least one magnetizing station along the generator stator periphery with magnet forming means thereat disposed to form permanent magnets in the rotor permanent magnet material as the rotor second periphery turns past said station with frequency excitation means coupled to said magnet forming means and, there is at least one set of power takeoff elements disposed at least partially around the periphery of the generator stator.