Abstract: Provided are a polyphenylene ether resin composition having excellent fluidity and heat resistance, and a vehicle lighting fixture bezel formed of this resin composition and having light weight, excellent external appearance, and low water absorbency. The resin composition contains: (A) 42-57 mass % of a polyphenylene ether resin having a reduced viscosity of 0.39-0.43 dL/g (in chloroform solvent at 30° C.); (B) 11-26 mass % of a polyphenylene ether resin having a reduced viscosity of 0.31-0.34 dL/g (in chloroform solvent at 30° C.); (C) 9-15 mass % of a block copolymer including a vinyl aromatic hydrocarbon polymer block (c1) and a hydrogenated conjugated diene polymer block (c2); and (D) 15-23 mass % of a homopolymer of a vinyl aromatic hydrocarbon. The (C) block copolymer includes 62-70 mass % of vinyl aromatic hydrocarbon-derived monomer units, has a weight-average molecular weight Mw of 50,000-70,000, and has a molecular weight distribution Mw/Mn (Mn is number-average molecular weight) of 1.00-1.30.

Abstract: Provided are a polyphenylene ether resin composition having excellent fluidity and heat resistance, and a vehicle lighting fixture bezel formed of this resin composition and having light weight, excellent external appearance, and low water absorbency. The resin composition contains: (A) 42-57 mass % of a polyphenylene ether resin having a reduced viscosity of 0.39-0.43 dL/g (in chloroform solvent at 30° C.); (B) 11-26 mass % of a polyphenylene ether resin having a reduced viscosity of 0.31-0.34 dL/g (in chloroform solvent at 30° C.); (C) 9-15 mass % of a block copolymer including a vinyl aromatic hydrocarbon polymer block (c1) and a hydrogenated conjugated diene polymer block (c2); and (D) 15-23 mass % of a homopolymer of a vinyl aromatic hydrocarbon. The (C) block copolymer includes 62-70 mass % of vinyl aromatic hydrocarbon-derived monomer units, has a weight-average molecular weight Mw of 50,000-70,000, and has a molecular weight distribution Mw/Mn (Mn is number-average molecular weight) of 1.00-1.30.

Abstract: The present invention relates to a polyacetal ABA type block copolymer having a liquid hydrogenated polybutadiene block hydroxyalkylated at both end having a specific monomer structure in the main chain and a polyacetal resin composition comprising the block copolymer and a specific polymer compound or an inorganic filler. The block copolymer and the resin composition can satisfy 4 characteristics necessary for materials for large-diameter gears, i.e. (1) high cycle capability (high productivity), (2) high roundness, (3) distinguished dimensional stability and (4) distinguished durability at the same time and provide useful materials for large-diameter gears having a pitch circle diameter of 60 mm or more.

Abstract: An electric power supply device 13, combining an overload protector device 3 and a starter device 4 each other, and an equipment using thereof comprises a socket terminal 5 connected to an electric part of the overload protector device 3, and a convex portion 10c opposing to a tip opening portion 5a of the socket terminal 5, which is nearly in conformity with the shape of that tip opening portion and has a little gap therebetween, wherein while keeping superiority in work of assembling external apparatuses onto the terminal pins, prying force caused onto the tip opening portion when the socket terminals of the starter device are fitted onto terminal pins of an external equipment is suppressed, thereby to improve reliability.

Abstract: An electric power supply device 13, combining an overload protector device 3 and a starter device 4 each other, and an equipment using thereof comprises a socket terminal 5 connected to an electric part of the overload protector device 3, and a convex portion 10c opposing to a tip opening portion 5a of the socket terminal 5, which is nearly in conformity with the shape of that tip opening portion and has a little gap therebetween, wherein while keeping superiority in work of assembling external apparatuses onto the terminal pins, prying force caused onto the tip opening portion when the socket terminals of the starter device are fitted onto terminal pins of an external equipment is suppressed, thereby to improve reliability.

Abstract: The present invention relates to a polyacetal ABA type block copolymer having a liquid hydrogenated polybutadiene block hydroxyalkylated at both end having a specific monomer structure in the main chain and a polyacetal resin composition comprising the block copolymer and a specific polymer compound or an inorganic filler. The block copolymer and the resin composition can satisfy 4 characteristics necessary for materials for large-diameter gears, i.e. (1) high cycle capability (high productivity), (2) high roundness, (3) distinguished dimensional stability and (4) distinguished durability at the same time and provide useful materials for large-diameter gears having a pitch circle diameter of 60 mm or more.

Abstract: The invention provides a thermal protector comprising an enclosure provided with a cylinder case having one open end and a cover for closing the open end and for fitting on the surface of a protected body, a protector section comprising two fixed terminal plates having fixed contacts respectively and secured on the bottom of the cylinder case, an adjusting screw provided on the bottom of the cylinder case, and the dished main bimetal provided with movable contacts facing to the fixed contacts for switching operation, and pressed and supported onto the head of the adjusting screw by a spring, and a heater wire provided near the main bimetal and connected between the one fixed terminal plate and the heater terminal, and a thermostat section having the bimetal which is disposed nearest to the cover at the position parallel to the surface of the protected body, wherein the protector section and the thermostat section are disposed on the bottom side and on the cover side of the cylinder case respectively and conne

Abstract: A polyoxymethylene resin composition which comprises (A) 70-99.89% by weight of a polyoxymethylene resin, (B) 0.1-20% by weight of at least one ethylene-substituted vinyl copolymer having a melting point of 40-80° C. and prepared by polymerization using a radical polymerization catalyst, a chromium-containing catalyst or a Ziegler catalyst, and (C) 0.01-10% by weight of at least one liquid ethylene-&agr;-olefin random copolymer. The resin composition of the present invention is small in friction coefficient and excellent in abrasion resistance under high load and high temperature against noncrystalline resins.

Abstract: A bimetal 40 is secured at a holding portion 40b to a fixed pin 52 and a snap portion 40a is supported by a support portion 12a. The free end 40a" of the snap portion 40a comes in contact with a movable contact plate 30 to thereby rock the plate 30. The displacement of the snap portion 40a is restricted at a boundary end portion 40a' by the holding portion 40b. Due to this, when the thermal protector carries out a snap action (or is reversed), the snap portion 40a is rocked like a lever around the support portion 12a supporting the snap portion 40a, and the free end 40a" of the snap portion 40a is greatly displaced. Thus, the travelling distance by which the movable contact 32 travels when the movable contact plate 30 is rocked, can be increased. This can prevent a delay in snap.

Abstract: Polyoxymethylene resin composition comprising (A) 50 to 99.9 parts by weight of a polyoxymethylene resin and (B) 0.1 to 50 parts by weight of a polyolefin resin, containing 30 to 100% by weight of an ethylene unit based on the whole amount of the polyolefin resin, prepared by using a single site catalyst. The present invention provides a polyoxymethylene resin composition which possess excellent lower friction characteristics and wear resistance at temperature over 60.degree. C.

Abstract: The present invention provides a method for producing a thin-walled molded article of a polyacetal resin comprising adding 10 to 1000 ppm of boron nitride having an average particle diameter of 1 to 10 .mu.m and a content of diboron trioxide of 0.005 to 1.0% by weight to a polyacetal resin and molding an article having a maximum wall thickness of 0.2 to 1 mm by injection molding.The present invention can provide a molded article of a polyacetal resin having little warpage at a high temperature and humidity.

Abstract: An engineering polyacetal resin composition comprising 0.05-20 parts by weight of a dispersant (B) and 5-40 parts by weight of a filler (C), and 100 parts by weight of a resin ingredient (A) which comprises 90-50% by weight of a polyacetal resin (a) and 10-50% by weight of a polyamide resin (b) having a melting point of up to 230.degree. C., a maximum particle diameter of 0.03-10 .mu.m and a maximum aspect ratio of up to 2, and is dispersed in a matrix of said polyacetal resin (a).

Abstract: The present invention provides a polyoxymethylene resin composition which is excellent in wear resistance and is suitable as materials for various sliding parts. The composition comprises (A) 65-98.8% by weight of a polyoxymethylene resin, (B) 0.2-5.0% by weight of a polyfunctional isocyanate compound, (C) 0.5-20% by weight of an olefin polymer containing 30% by weight or more of ethylene and a functional group containing an active hydrogen, and (D) 0.2-10% by weight of polyethylene.

Abstract: A highly conductive resin composition comprising:(a) 55% by weight or more of a polyoxymethylene resin,(b) 5-15% by weight of a carbon black exhibiting a dibutyl phthalate absorption of 300 ml/100 g or more,(c) 0.05-10% by weight of an epoxy compound, and(d) 5-20% by weight of a polyolefin copolymer of ethylene and an .alpha.-olefin of 3-6 carbon atoms, or a polyester copolymer having diol residues represented by formula (1) and dicarboxylic acid residues represented by formulae (2), (3) and (4),--(O--R--O)-- (1)R is an aliphatic hydrocarbon residue of 2-12 carbon atoms, ##STR1## R.sup.1 is an ethylene group, a polymethylene group of 3-6 carbon atoms, or an alkenylene group of 2-6 carbon atoms, ##STR2## l is an integer of 7-24, ##STR3## Ph is an aromatic hydrocarbon residue, and the molar ratio of (2)/[(2)+(3)+(4)] being 5-100 mole %.

Abstract: A polyoxymethylene resin composition excellent in decorative property and hot-stampability comprising 50-97% by weight of polyoxymethylene resin and 3-50% by weight of polyester random copolymer comprising a diol residue A and a dicarboxylic acid residue B,said diol residue A being represented by the formula --O--R--O , wherein R is an alkyl group of 2-12 carbon atoms, andsaid dicarboxylic acid residue B being represented by at least one of formulae (1), (2) and (3), ##STR1## wherein n is an integer of 2-6, l is an integer of 7-24, and Ph is an aromatic hydrocarbon residue, the proportion of (1) to the sum of (1), (2) and (3) being 5-100% by mol, provided that when said proportion is 100% by mol, (1) consist of at least two different types of (1).

Abstract: A motor protector includes a case having an open end, a terminal plate secured to the case and having a pair of fixed contacts, a disc-shaped bimetal supported in the case and having a pair of movable contacts engaged with and disengaged from the fixed contacts respectively, a temperature-sensitive switch disposed so as to close the open end of the case and sensing the temperature of a sensed object to be turned on when the temperature thereof reaches a predetermined value, and a heater disposed in the vicinity of the bimetal and connected in series to the temperature-sensitive switch.

Abstract: A thermal relay includes a housing, two fixed contacts secured to respective terminals disposed in the housing, a disc-shaped bimetal disposed in the housing and having two movable contacts made into and out of engagement with the respective fixed contacts, an adjusting screw including a screw portion and a head portion which are coupled with each other by a meltable metal, and a coil spring biasing the disc-shaped bimetal to the head portion of the adjusting screw to thereby support it.

Abstract: A protective thermal relay comprises a main heater for heating a snap-action element of a bimetallic switch to open the switch. The main heater is connected in series with the motor or other device to be protected by the relay. There is also an auxiliary heater for the bimetal element that is energized through an abnormal condition detection relay, e.g., a negative phase sequence detector, when the abnormal condition occurs. The auxiliary heater is a positive temperature coefficient type and will heat and hold the switch in the motor off mode as long as the negative phase sequence or other abnormal situation remains.