Abstract: In order to prevent degradation of the recording performance during radio frequency recording, and to provide a thin film magnetic head and a recording reproducing sectional pattern magnetic head which has a magnetic pole width less than 2 .mu.m and an ultra high density magnetic storage apparatus of 10 Gb/ in.sup.2 grade, a recording head is provided in which a lower part magnetic film serves as a shielding film of a reproducing selection, a non magnetic gap film is formed during formation of the upper part magnetic film and the lower part magnetic film, one part of the lower part magnetic film or the upper part magnetic film has a higher resistivity of more than 80 .mu..OMEGA.cm than other parts, the upper part magnetic film is formed by flame galvanizing, and a gap section of the lower part magnetic film or the upper part magnetic film has a convex shape.

Abstract: A tactile push button switch has a switch mechanism and a push button for driving the switch mechanism provided in a box-shaped switch case having a switch cover. The top of the push button protrudes upwardly of the switch cover through an opening made therein, and a drip-proof member made of sponge material is bonded to the top of the switch cover around the protruding push button.

Abstract: Heat insulation panels made from plates and the modified polyisocyanurate foams provided by a reaction of a polyisocyanate with a polyol composition mixture comprising a polyol, water, a trimerization catalyst, a carbodiimide catalyst, and an aromatic compound used as a chain extender. An amount of the aromatic compound used in the preparation is 0.5 to 10.0% by weight with respect to a total weight of the polyisocyanate and the polyol mixture.

Abstract: A contact connector is disclosed, which comprises an insulation body defining a contact chamber, a first pin hole, and a second pin hole, the contact chamber being defined inside the insulation body, the first pin hole and the second pin hole being defined on the front surface of the insulation body, the first pin hole being spaced apart from the second pin hole, the second pin hole extending along a first line which passes the first pin hole, the second pin hole having a width at least twice the height thereof, the first pin hole and the second pin hole being connected to the contact chamber, a first contact, disposed in the contact chamber, having at least one elastic contact piece traversing the first pin hole along the first line, and a second contact, disposed in the contact chamber, having at least one elastic contact piece traversing the second pin hole along the first line.

Abstract: A process of the preparation of the modified polyisocyanurate foams provided by a reaction of a polyisocyanate with a polyol composition mixture comprising a polyol, water, a trimerization catalyst, a carbodiimide catalyst, and an aromatic compound used as a chain extender. An amount of the aromatic compound used in the preparation is 0.5 to 10.0% by weight with respect to a total weight of the polyisocyanate and the polyol mixture.

Abstract: A contact connector is disclosed, which comprises an insulation body defining a contact chamber, a first pin hole, and a second pin hole, the contact chamber being defined inside the insulation body, the first pin hole and the second pin hole being defined on the front surface of the insulation body, the first pin hole being spaced apart from the second pin hole, the second pin hole extending along a first line which passes the first pin hole, the second pin hole having a width at least twice the height thereof, the first pin hole and the second pin hole being connected to the contact chamber, a first contact, disposed in the contact chamber, having at least one elastic contact piece traversing the first pin hole along the first line, and a second contact, disposed in the contact chamber, having at least one elastic contact piece traversing the second pin hole along the first line.

Abstract: A method for selecting the proper program corresponding to respective destinations of TV sets from many programs store in a microcomputer installed in said TV set, is characterized in that, the destination code identifying the country of destination is transmitted together with power on code from the remote controller which is essentially provided with said TV set, and said microcomputer selects said proper program prepared for said destination by receiving said destination code transmitted from said remote controller.

Abstract: A device for selecting a TV channel in which the names and numbers of the stations are stored in memory in advance. The user selects a program by pressing a key chosen by number or by character. In response to the user's choice of an initial letter, the device displays, individually or in a list, the whole name of the program or station so the user can choose a desired one.

Abstract: A connector plug has a plurality of contact pins embedded in an insulating body to extend therethrough. The insulating body is mounted in a cylindrical metal cover, on which is provided an insulating cap having a holding portion whose cross section is D-shaped to facilitate the positioning of the connector plug when it is inserted into an associated socket.

Abstract: A connector plug is disclosed, in which a plurality of contact pins are embedded in an insulating body mounted in a cylindrical metal cover. A shielded cable having wires connected to contact pins is led out from the cylindrical metal cover. A cylindrical shield conductor which is fitted on the shielded cable is fitted on and secured to a rear portion of the cylindrical metal cover. A rear end portion of the cylindrical shield conductor is caulkedly urged against the cable, thus clamping the cable. A shield braid of the cable is electrically connected to the cylindrical shield conductor. The outer periphery of a rear portion of the cylindrical metal cover and cylindrical shield conductor is covered by an insulating cap.

Abstract: A (7S,9S) isomer or its racemic modification of the aminonaphthacene derivative of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom, a hydroxyl group or a lower alkoxy group, R.sup.2 is a hydrogen atom or a hydroxyl group, R.sup.3 and R.sup.4 are each a lower alkoxy group or, when taken together, represent an ethylenedioxy group or an oxo group, A is an ethylene group optionally bearing at least one lower alkyl and Q is a hydroxyl group, a lower alkoxy group or a dimethylamino group, or an acid addition salt thereof, which is useful as an anti-tumor agent.

Abstract: An aminonaphthacene derivative of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom, a hydroxyl group or a lower alkoxy group, R.sup.2 is a hydrogen atom or a hydroxyl group, R.sup.3 is a hydrogen atom or a lower alkanoyl group and R.sup.4 and R.sup.5 are, same or different, each a hydrogen atom, a lower alkyl group, a lower hydroxyalkyl group or a group of the formula: ##STR2## wherein A is an alkylene group which may have one or more lower alkyl substituent(s) and R.sup.6 and R.sup.7 are, same or different, each a hydrogen atom, a lower alkyl group, a lower hydroxyalkyl group or a lower aminoalkyl group, and an acid addition salt thereof, which is useful as anti-tumor agent.

Abstract: An improvement of a method for purifying 1,2-dichloroethane by passing through a distillation column a crude 1,2-dichloroethane produced by oxychlorination of ethylene with at least one of a crude 1,2-dichloroethane produced by direct chlorination of ethylene and a crude uncracked 1,2-dichloroethane recovered in thermal cracking of 1,2-dichloroethane, the improvement which comprises feeding the oxychlorination-produced 1,2-dichloroethane to an upper plate of the distillation column which is above a plate of the column to which at least one of the direct chlorination-produced 1,2-dichloroethane and the uncracked 1,2-dichloroethane is fed, and recovering 1,2-dichloroethane as a bottom product. The purification method is very useful in the production of vinyl chloride by thermal cracking of 1,2-dichloroethane since carbon tetrachloride effective as a thermal cracking catalyst is recovered in concentrations stabilized within the range of .+-.500 p.p.m.

Abstract: There are provided compounds of the formula: ##STR1## wherein either R.sub.1 or R.sub.2 is a hydrogen atom, a hydroxy group, an acyloxy group, a phthalimido group or an acetamido group and the other is a hydrogen atom; either R.sub.3 or R.sub.4 is a hydroxy group or an acyloxy group and the other is a hydrogen atom; either R.sub.5 or R.sub.6 is a hydroxy group or an acyloxy group and the other is a hydrogen atom; either R.sub.7 or R.sub.8 is a hydrogen atom, a methyl group, a hydroxymethyl group, an acyloxymethyl group, an alkoxycarbonyl group, a group of the formula: ##STR2## (wherein X.sub.1 and X.sub.2 are a hydrogen atom or a lower alkyl group), or a carboxyl group and the other is a hydrogen atom; either R.sub.11 or R.sub.12 is a hydrogen atom, a hydroxy group or an acyloxy group and the other is a hydrogen atom; either R.sub.13 or R.sub.14 is a hydroxy group or an acyloxy group and the other is a hydrogen atom; either R.sub.15 or R.sub.

Abstract: An improvement of a method for purifying 1,2-dichloroethane by passing through a distillation column a crude 1,2-dichloroethane produced by oxychlorination of ethylene with at least one of a crude 1,2-dichloroethane produced by direct chlorination of ethylene and a crude uncracked 1,2-dichloroethane recovered in thermal cracking of 1,2-dichloroethane, the improvement which comprises feeding the oxychlorination-produced 1,2-dichloroethane to an upper plate of the distillation column than a plate of the column to which at least one of the direct chlorination-produced 1,2-dichloroethane and the uncracked 1,2-dichloroethane is fed, and recovering 1,2-dichloroethane as a bottom product.

Abstract: Compounds of the formula, ##STR1## wherein R is C.sub.2 -C.sub.17 alkyl group, C.sub.3 -C.sub.7 cycloalkyl group, 1-adamantyl group, pyridyl group, pyridine N-oxide, diphenylmethyl group, benzyl group which may or may not be substituted with nitro group, halogen atom, C.sub.1 -C.sub.3 alkyl group or C.sub.1 -C.sub.3 alkoxy group, or phenyl group which may or may not be substituted with nitro group, halogen atom, hydroxy group, C.sub.1 -C.sub.3 alkyl group, C.sub.1 -C.sub.3 alkoxy group, carboxy group, C.sub.2 -C.sub.4 alkoxycarbonyl group, phenoxycarbonyl group, carbamoyl group, N-phenylcarbamoyl group, N-adamantylcarbamoyl group, benzoylamino group, trifluoromethyl group, C.sub.2 -C.sub.4 alkanoyloxy group, 1-adamantoyloxy group or benzoyloxy group and salts thereof have an anticancer activity and an immunostimulating activity.

Abstract: Antitumor substances are prepared by culturing a microorganism, Acinetobacter calcoaceticus. The antitumor substances have potent antitumor activity as well as immunostimulatory activity and are effective in a very small amount without harmful effects such as toxicity.

Abstract: 4-Carbamoyl-5-hydroxyimidazole representable by the following formula: ##STR1## and pharmaceutically acceptable salts thereof have been found to be useful as therapeutic agents for the treatment of rheumatism and nephritis.