Abstract: An aircraft, comprising a body; a structure providing flying of the aircraft; and a structure for preventing or at least reducing chances of crash of the aircraft in the event of malfunction, the preventing and reducing structure include a structure for preventing a direct hit of the body of the aircraft against a surface.

Abstract: A device for silverizing water comprises an electrode head provided with two electrodes of which at least one electrode is a silver containing electrode, means for supplying current to said electrodes, a housing provided with a cavity, and connecting means for connecting said electrode head with said housing turnably between a working position in which said electrode head is located outside said housing so that said electrode can be introduced in a reservoir with water, and a storage position in which said electrode head is turned back into said cavity of said housing.

Abstract: A device for monitoring the operation of a kitchen range has a mirror element which can be positioned on the range so that a flame is reflected in the mirror element and can be seen by a user to adjust the flame.

Abstract: A device for silverizing water has a plurality of electrodes including silver electrodes so that a passing water is saturated with silver ions, and a temperature maintaining unit with cooling and heating elements to maintain a required temperature and silver ions saturation of water.

Abstract: An electrically heated fish tank unit includes a fish tank having a bottom standing on a frame having an upper surface with a central opening. A one piece flat electric heater disposed between the bottom of the tank and the frame includes a thermostatically controlled central resistance heating element abutting the bottom of the tank from below and surrounded by a peripheral portion devoid of the heating element and clamped between the bottom of the tank and the frame. The surface of the heater abutting the tank may be decorative so as to be visible through the tank wall, while the opposite surface is covered by thermal insulation to prevent heat dissipation away from the tank. An indicator light and thermometer may be provided to indicate the operation of the heater and temperature of the tank.

Abstract: A device for silverizing running water and an electrode therefor are formed so that the electrode has a curved guide provided on its one surface and a plurality of through-going openings located outside of the curved guide, to direct water to be silverized from inside of the curved guide to its outside and then through the openings.

Abstract: A device for silverizing water has a plurality of positive silver-containing electrodes and a plurality of negative electrodes, and a housing composed of a plurality of housing portions each having a receptacle for receiving a respective one of the electrodes, wherein the housing portions are substantially identical and can be assembled with and disassembled from one another.

Abstract: A running water passes through a passage from its inlet to its outlet and is guided by at least two electrodes so that it repeatedly changes its direction to flow transversely to and along the electrodes to be continuously saturted during its running by silver ions emerging from an anode.