Abstract: A slicing knife comprises a handle and a blade extending from one end of the handle where the blade is generally rectangular in shape and has opposed edges honed to a knife edge. Formed into the thickness dimension of the blade are a plurality of zones of reduced thickness which may be longitudinally-spaced apertures which are separated from one another by ribs having a generally rhombic cross-section. The blade tapers from a maximum thickness dimension in each direction in creating the knife edge and in approaching the zones of reduced thickness. The thickness of the ribs exceeds the blade thickness such that when it is pressed, for example, through a block of cheese, the cheese only contacts the blade along the line segments defined by the corners of the rhombic ribs.

Abstract: A preheater unit magnetically attachable to the surface of the oil pan of an automobile engine includes an electric heating unit and a magnetic device situated within a rectilinear shell having an open side closed by a non-magnetic heat transfer plate. The heating unit is encased in the plate and surrounds the magnetic device. The magnetic device includes a permanent magnet disposed between two magnetic end portions situated to be operative in the same plane as the outer planar surface of the plate through parallel spaced apart openings in the plate for magnetically attaching the preheater unit to the surface of the oil pan. A temperature control switch within the shell maintains the heat transfer plate within predetermined temperature limits.

Abstract: A preheater unit magnetically attachable to the surface of the oil pan of an automobile engine includes an electric heating unit and a magnetic device situated within a rectilinear shell having an open side closed by a non-magnetic heat transfer plate. The heating unit is encased in the plate and surrounds the magnetic device. The magnetic device includes a permanent magnet disposed between two magnetic end portions situated to be operative in the same plane as the outer planar surface of the plate through parallel spaced apart openings in the plate for magnetically attaching the preheater unit to the surface of the oil pan. A temperature control switch within the shell maintains the heat transfer plate within predetermined temperature limits.