Abstract: The invention is directed to medical leads for use with implantable medical devices. Various features of medical leads are described, many of which may be useful in a variety of different leads, e.g., used in a variety of different applications. In one embodiment, the invention provides a medical lead of varying stiffness characteristics. In another embodiment, the invention provides a medical lead having a semi-conical shaped distal tip that becomes wider at more distal tip locations. In either case, described lead features may be particularly useful for J-shaped lead configurations used for implantation in a patient's right atrium. Many other types of leads, however, could also benefit from various aspects of the invention.

Abstract: The invention is directed to medical leads for use with implantable medical devices. Various features of medical leads are described, many of which may be useful in a variety of different leads, e.g., used in a variety of different applications. In one embodiment, the invention provides a medical lead of varying stiffness characteristics. In another embodiment, the invention provides a medical lead having a semi-conical shaped distal tip that becomes wider at more distal tip locations. In either case, described lead features may be particularly useful for J-shaped lead configurations used for implantation in a patient's right atrium. Many other types of leads, however, could also benefit from various aspects of the invention.

Abstract: An ingot stool of the type upon which steel is poured comprising a rectangular slab of cast iron having a top, bottom and sides with the top having its center portion cut out, a precast ceramic stool insert adapted to fit in snug relationship with center cut out portion of the stool, at least two vertical recesses formed within the ceramic stool insert adapted to receive a nut and at least two bolts passing through the bottom of the stool and threaded into the nuts located within the vertical recesses and ceramic plugs adapted to fill the vertical recesses after the nuts have been engaged with the bolts.

Abstract: The base plates or stools of ingot molds used in the casting and teeming of molten steel can be repaired by spraying onto the ingot mold base plate from 2-5 gallons of a composition comprising:______________________________________ Aluminum silicate refractory grain.sup.1 50-80% Al.sub.2 O.sub.3 4.0-17.0% Bentonite clay 0.2-5.0% Binder 4.0-25% 75% phosphoric acid 72-82% Alumina trihydrate 6.2-16.2% Powdered boric acid 1.0-7.0% H.sub.2 O 4.0-14.

Abstract: The base plates or stools of ingot molds used in the casting and teeming of molten steel can be repaired by spraying onto the ingot mold base plate from 2-5 gallons of a composition comprising:______________________________________ Less than 20 mesh alumina-silicate refractory grain.sup.1 49.5% Less than 200 mesh alumina silicate refractory grain.sup.1 11.56% Less than 325 mesh Al.sub.2 O.sub.3 13.21% Less than 325 mesh bentonite clay 1.75% Binder - 75% phosphoric acid 77.0% Alumina/trihydrate 11.2% Powdered boric acid 2.35% H.sub.2 O 9.45% 11.99% Water 11.99% ______________________________________ +HU 1Contains approximately 47% as Al.sub.2 O.sub.