Abstract: Catalyst for polymerization of an olefin is provided, which comprises (A) a transition metal compound having a carbon-metal bond structure and (B) an activating co-catalyst, or (A) a transition metal compound having a carbon-metal bond structure, (B) an activating cocatalyst and (C) an organometallic compound.

Abstract: Disclosed is a method for the preparation of a linear polysilalkylenesiloxane from four- to seven-membered cyclic silalkylenesiloxane by subjecting the cyclic silalkylenesiloxane to ring opening polymerization by using as a catalyst a polynuclear ruthenium-carbonyl complex in which carbonyl groups are coordinated with three or four ruthenium atoms, in the presence of a silane compound having at least one Si—H bond.

Abstract: The applicants have discovered that by simultaneously administering particular combinations of drugs at particular dosage levels by means of a transdermal delivery system, anesthesia may be induced in patients requiring such treatment. It has been found that profound sedation or an analgesic effect may be produced by means of a particular combination of pharmacologic agents which are administered simultaneously by transdermal administration. A patch system has been devised which is useful for reversing anesthesia.

Abstract: A method for forming decorative creases in a trim cover assembly for an automotive seat, which basically involves using one unitary sheet of base trim cover assembly and effecting a gather sewing to such base trim cover assembly so that at least one decorative crease is formed therein in a fashion developing symmetrically relative to the sewing direction. The resulting decorative crease may be deepened for more aesthetic effect by pinching and sewing a part of reverse side of the trim cover assembly corresponding to the crease, along the sewing direction. Also, an automotive seat with the trim cover assembly made by such method.

Abstract: A lumbar support device for an automotive seat, which comprises a drive mechanism, a crank-like rod operatively connected to the drive mechanism, an elastic synthetic resin support plate, the upper part of which is movably secured to a seat back frame within a seat back of the seat, and a lumbar support portion defined in the lower part of the support plate. The lumbar support portion is formed in a cambered or forwardly curved shape. A forward and backward displacement of the support plate may be ajustably effected by the drive mechanism and crank-like rod to apply a pressure against the lumbar support area of foam cushion member of the seat back, and because of integral formation of both support plate and lumbar support portion, a gradual pressure gradient or distribution may be attained in the seat back cushion member, without creating a local non-pressure or extremely soft spot therein.

Abstract: A packing material for a liquid chromatograph is provided particularly to be used for separating polycyclic aromatic compounds. The packing material is prepared by treating a base material of the packing material with a coupling agent of the formula (I): ##STR1## wherein Aro is an aromatic moiety, R.sup.1 and R.sup.2 are independently alkyl, alkenyl, aryl, lower alkoxy group, or halogen atom, R.sup.3 is a lower alkoxy group or halogen atom. Since an aromatic moiety within one molecule is immobilized through many functional groups on the surface of the base material, the packing material has stable and excellent separating properties.

Abstract: An armrest mounting structure in an automotive seat, in which an armrest is provided between a fore-and-aft movable seat cushion frame and a seat back frame which is variable over its inclination angle responsive to the fore-and-aft movement of the seat cushion frame, with such an arrangement that a reinforcing bracket is provided, extending over the seat back and seat cushion frames, and the armrest is partly supported by such reinforcing bracket, so as to increase the strength of the seat back frame for supporting the armrest.

Abstract: A cover for a slide rail of an automotive seat, which comprises a first cover section for covering the rearward end portion of slide rail and a second cover section for covering a support leg member which support the slide rail, both of which two cover sections are integrally formed together. The first cover section covers the rearward end portion of slide rail at such a length that extends over a movable raige in which an upper rail of the slide rail moves relative to lower rail thereof. An opening is formed in the cover for permitting the upper rail to pass therethrough without inteference and alid plate is provided to normally close such opening but permit for opening the same when the upper rail is moved therethrough.

Abstract: A sintered titanium boride ceramic body consists essentially of a matrix having a three-dimensional net-work structure and consisting essentially of TiC and at least one MB selected from transition metals in a mixing crystals and solid solutions condition, TiB.sub.2 particles separately placed in the matrix, and a grain boundary formed in the periphery of each of the TiB.sub.2 particles. The grain boundary is in a mixing crystals and solid solutions condition of TiB.sub.2 and M boride. M denotes a metal.

Abstract: A sintered metal boride ceramic body consists essentially of: a metal boride matrix consisting essentially of MB or MB.sub.2 and TiC in a and solid solution and TiB.sub.2 particles dispersed in the metal boride matrix, wherein M denotes a metal such as Ni and Cr.

Abstract: An arrangement of a headrest in a seat wherein the headrest is displaceable rotatively about a shaft between a vertical use and horizontal non-use positions, and a drive mechanism is disposed at one end side of the shaft while a stopper is fixed on another end of same shaft, and wherein an elastic means is disposed at a point wherein such stopper is to be brought to contact with the elastic means.

Abstract: A sintered metal boride ceramic body manufactured by mixing 75-99 wt. % of TiB.sub.2 powder with 1-25 wt. % in total of Ni powder and C powder to thereby make a mixture, shaping the mixture together with a binder to thereby make a shaped ceramic body, and firing the shaped ceramic body in a non-oxidizing atmosphere.

Abstract: A method for manufacturing a metal boride ceramic material, includes mixing metal boride powder with 1-20 wt. % metal powder and 0.1-10 wt. % carbon powder, shaping the mixture and firing it. Alternatively, the metal boride powder may be mixed with 0.1-89 wt. % metal carbide powder thereby make a mixture, followed by shaping the mixture and firing it.

Abstract: A vertical adjustment device for adjusting the height of a headrest for use in a vehicle seat is disclosed, which comprises two outer slides respectively erected above a seat back, two inner slides respectively provided on either sides of the headrest to be inserted into the respective outer slides in a vertically slidable manner, and two stoppers each provided in the lower end portion of each of the outer slides to prevent the inner slide from slipping off downwardly. Each of the stoppers is fitted into the lower portion of the outer slide and is formed of synthetic resin integrally with a protection cover in the lower portion thereof to cover up the lower edge of the outer slide. A shock absorbing member is provided over the upper opening of the outer slide.

Abstract: An apparatus for producing silicon single crystal from melted silicon by the pull-up process using a seed crystal, wherein at least a portion of a device in contact with the melted silicon includes a layer of silicon nitride precipitated from gaseous phase and comprising 20% or above of .beta. phase, or comprising 80% or above of .alpha. phase whose crystal grains have grain diameters of 5 .mu.m or above at a ratio of 10% or more.

Abstract: A hot fluid-conducting pipe assembly, comprising an inner metal pipe through which flows a hot fluid,Support pins regularly arranged on and outwardly projecting from the outer surface of the inner metal pipe,Refractory of said coupling members fixed to the inner metal pipe by the support pins, each coupling members having upper and lower faces concentric with the surface of the inner metal pipe, trapezoidal side faces in the longitudinal direction of the inner metal pipe, and sectorial side faces in the circumferential direction of the inner metal pipe,Heat-insulating refractory blocks mounted between the coupling members and each having an underside portion provided with a cushioning layer formed of an elastic refractory material,A heat-insulating layer formed of an elastic refractory material and uniformly covering the upper faces of the coupling members and of the heat-insulating blocks, andAn outer metal pipe covering the heat-insulating layer.

Abstract: Wall structure of a hot fluid chamber, comprisingAn inner metal wall;A plurality of support pins regularly arranged on and projecting outward from the surface of the inner metal wall;A plurality of coupling members fixed to the inner metal plate by the support pins, each coupling member being of a truncated quadrangular pyramid shape and made of a heat-insulating refractory material;A plurality of heat-insulating refractory blocks mounted between the coupling members, each block having the underside portion provided with a cushioning layer formed of an elastic refractory material;A heat-insulating layer formed of an elastic refractory material and covering the surfaces of the coupling members and of the heat-insulating refractory blocks; andAn outer metal wall covering the heat-insulating layer.