Abstract: A continuous thin sheet of a TiAl intermetallic compound consisting of from 35 to 44 wt % Al and the balance Ti and unavoidable impurities, having a thickness of from 0.2 to 3 mm, and having a solidified, as-cast structure comprising columnar crystals extending from both surfaces of the sheet toward the center of the sheet thickness, and a process for producing the same by using a twin-roll type continuous casting procedure.

Abstract: A collet device for engagement with a spindle hub for clamping a flexible disk between the collet device and the hub, the collet device having a collet having a plurality of radially extending petal-like portions therearound, a collet shaft on which the collet is mounted, a regulating body on the collet and having stops thereon extending outside the ends of the petal-like portions and engagable by the ends of the petal-like portions for limiting the outward movement of the petal-like portions during an increase in the diameter of the collet, and an enlarging spring on the regulating body have legs thereon engaging the ends of the petal-like portions for urging the ends of the petal-like portions outwardly for increasing the diameter of the collet.

Abstract: A magnetic head which includes a head piece, a gimbal movably supporting the headpiece and a layer of low electrical resistance metal formed on the surface of the gimbal so as to shield the head piece from relatively high frequency magnetic field noise.