摘要:
An arresting insulator is provided which includes an insulator body made of an insulative material and a non-linear resistor. The insulator body includes a head for linking the insulator to an adjacent insulator, and a shed formed integrally with the head. The resistor is secured in the insulator body and has a non-linear relation between residual voltage and current. More specifically, the resistor has a characteristic that satisfies the equation:V.sub.NmA /H.gtoreq.300 V/mmwherein V.sub.NmA is a threshold reference voltage that causes a current of at least N milliamps to start flowing across the resistor to cause the resistor to perform a surge absorbing function. N is an arbitrary value in the range of 1 to 10, and H is the axial length of the resistor along a direction of electric field in millimeters.
摘要:
A wireless base station includes: a wireless apparatus; and a wireless controlling apparatus, the wireless controlling apparatus including: an embedding processor for embedding a control signal, which is to control a wireless device connected to the wireless apparatus, in a control and management information area in a specific frame, the specific frame being regularly assigned to each frame group including a predetermined number of frames of a plurality of frames included in a transmission frame transmitted via the transmission link; and a first transmitter for transmitting the transmission frame to the wireless apparatus via the transmission link, the wireless apparatus including: an extractor for extracting the control signal from the specific frame in the transmitted transmission frame; and a second transmitter for transmitting the extracted control signal to the wireless device.
摘要:
A paste for formation of ceramic capacitor electrode, composed of 10 to 14% by weight of an organic vehicle and 86 to 90% by weight of a platinum powder, wherein the platinum powder contains, in 100% by weight of the powder, 54 to 60% by weight of a spherical particle powder, 36 to 40% by weight of a flaky particle powder and 0 to 10% by weight of an indefinite particle powder. The electrode layer film of ceramic capacitor formed with the paste has a density, a surface roughness and an adhesion strength all of given values, can have improved adhesivity to the dielectric layer of the ceramic capacitor, and can make small the through holes generated in the electrode layer.
摘要:
A method producing a low-density flexible polyurethane foam comprising stirring a starting mixture containing a polyhydroxy compound, a polyisocyanate, a foaming agent and a catalyst to thereby foam the mixture, in which a foaming agent selected from the group consisting of water, formic acid and its salts is used in an amount of at least 10% by weight as water equivalent per 100 parts by weight of the polyhydroxy compound, and the mixture is stirred at 15.degree. C. or below by previously adjusting the temperature of the mixture to 15.degree. C. or below and under a highly catalytic activity.
摘要:
A method of manufacturing molded products (or foamed and molded asphalt/urethane foam products) most suitable for sound-proof, vibration control and sealing members which are applied to the floor panel, dashboard and the like in a car, for example, and more particularly, a method of manufacturing foamed and molded asphalt/urethane products comprising introducing polyalkylene polyol having at least two or more hydroxyls in a molecule and polyisocyanate having two or more isocyanate radicals into a mold together with a catalyst and a foaming agent, and reacting them in it, wherein said polyalkylene polyol includes asphalt previously emulsified and dispersed therein; and a laminated structure including a layer of foamed asphalt/urethane foam made according to the method.
摘要:
A fireproof laminates passing Grade 2 incombustibility according to Japanese Industrial Standard (JIS) A-1321 combustion test is disclosed. The laminate comprises a urethane modified polyisocyanurate foam as a core material and a particular front surface material piled on the core material through self-adhesion of the foam.
摘要:
An excellent flame- and smoke-resistant polyurethane foam is produced by reacting a polyol, a polyisocyanate and an amine-carbamate of primary or secondary amine having hydroxyl group in the presence of a catalyst and a surfactant.
摘要:
A dispenser with a transfer head includes a feeding roller placed within a case provided with an opening, and supporting a transfer tape T so as to be capable of being fed; a take-up roller for taking up a base material tape that has been used to transfer; a transfer roller for transferring a transfer agent; an interlocking mechanism for rotating the feeding roller and the take-up roller in an interlocking manner; a holding member provided on the opening side in a front/back direction so as to be capable of moving forward and backward; and a rotational frame for supporting the feeding roller, the take-up roller and the transfer roller, wherein when a pressing force is applied to the case while the holding member abuts against a surface to be transferred P, the transfer head is relatively projected, and moved on the surface P with pressing thereto so that the transfer agent can be transferred.
摘要:
An improved line arrester is disclosed that includes a non-linear resistor. The arrester includes a pair of arcing horns are respectively provided on an earth side and a line side of the arrester, with an aerial discharge gap being provided therebetween. The aerial discharge gap is in electrical parallel with the resistor. The length of the aerial discharge gap is selected such that flashover does not occur in response to currents smaller than a rated discharge current of the resistor, yet flashover does occur in response to a current that is greater than the rated discharge current, but lower than a critical discharge current of the resistor. With this arrangement the resistor is protected against the lightning surge current greater than the critical discharge current.