Abstract: An electric switch including a frame, a first stationary contact, a roll element adapted to rotate relative to the frame, a rotating contact stationary fixed to the roll element, and an arc extinguisher plate system. The arc extinguisher plate system includes at least one first arc extinguisher plate for extinguishing an electric arc generated during an opening event between the first stationary contact and a first contact portion of the rotating contact. The at least one first arc extinguisher plate is fixed to the roll element.

Abstract: A fuse holder assembly (1) is provided having at least two electrically insulated fuse housings in the form of passages (5, 33) associated with the body and each of which is adapted to receive a fuse (6) held under tension therein by means of an elongate tension member (7) and cooperating spring loaded tensioning element. The fuse housings have separate intermediate contacts (16, 17, 34, 35) at one end adapted for sequential connection to a circuit contact (20) by way of a rotatable conductive arm (18, 37) spring loaded to effect rotation of the arm from one intermediate contact to the other. Stop means (22, 23, 36 39) for temporarily maintaining the arm in association with one intermediate contact against the spring loading of the arm acts to release the arm for movement towards a subsequent intermediate contact only when the spring loaded tensioning element has substantially reached the end of its operative movement to clear the blown fuse.

Abstract: An electrical control apparatus characterized by a pair of separable contacts with electromagnetic means for opening and closing the contacts and including a U-shaped core having spaced legs and a yoke, a permanent magnet across the yoke, and the magnet having a cross-section greater than that of either leg.