Abstract: A single bladed cooking knife having two aligned cutting edges. An enclosure for the knife is provided in which an upper half-shell are joined and a lower half-shell joined to each other to form an enclosure for the knife; one end of the knife is coupled to the enclosure for pivoting the knife from a first position within the enclosure with one of the cutting edges positioned within the enclosure and another of the cutting edges being external of the enclosure to a second position with both of the cutting edges external of the enclosure. The knife blade is lockable, in the first and said second positions, and the knife blade is associated with a mechanism for unlocking the knife blade to move the knife blade from the first position to the second position and vice-versa.

Abstract: A device for neutralizing electrostatic charge and removing dust and particles attached by the charges on a gramaphone record or disc, the device comprising a body; a handle on the body for hand operation of the device adjacent to a surface of the disc to be treated; a cap head and a pushbutton on the body; at least one ionic flux- and electric field- generating electrode within the cap head; a piezoelectric generator in the body activated by the pushbutton; and brush means on at least a portion of an edge of the cap to remove dust from said surface immediately after said surface has passed in front of the cap and has been subjected to the action of ionic flux and electric field from the electrode.