Abstract: A silicone rubber composition comprising 0.01 to 50 weight percent of a perfluoroalkyl group-containing polydiorganosiloxane having on a side chain (F1) an organic group selected from the group consisting of polyoxyalkylene group-containing organic groups, C12 or higher alkyl group, and polydialkylsiloxane chain-containing organic groups, and having of a side chain or at a molecular chain terminal (F2) a perfluoroalkyl group-containing organic group described by the general formula F(CF2)a—R1—, where R1 is selected from the group consisting of an alkylene group, an alkyleneoxyalkylene group, and a group in which ═CO or —COO— is present in an alkylelne chain, and a is an integer of at least 3, and having a weight average molecular weight of at least 1000.

Abstract: A silicone rubber sponge composition, a silicone rubber sponge, and a process for making a silicone rubber sponge. The silicone rubber sponge composition comprises (A) 100 parts by weight of an organopolysiloxane gum described by average structural unit RaSiO(4−a)/2, where R is a monovalent hydrocarbon radical or haloalkyl and a is 1.95 to 2.05, (B) 1 to 400 parts by weight of an inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles (D) a mixture of (a) water-soluble silicone and (b) water in an amount such that the water in the mixture is equivalent to 0.01 to 10 parts by weight per 100 parts by weight of component (A), and (E) a curing agent in an amount sufficient to cure the composition.

Abstract: A moldable silicone rubber sponge composition comprising (A) 100 weight parts silicone rubber base compound with a Williams plasticity at 25° C. of 50 to 600 comprising (a) 100 weight parts diorganopolysiloxane gum that contains at least 2 alkenyl groups in each molecule and (b) 1 to 120 weight parts wet-process silica, (B) 0.01 to 50 weight parts hollow gas-containing thermoplastic resin powder, and (C) curing agent in an amount sufficient to effect curing of the composition. The invention is further a silicone rubber sponge afforded by the thermosetting of the above-defined moldable silicone rubber sponge composition and a method for producing the silicone rubber sponge.

Abstract: A silicone rubber sponge composition, a silicone rubber sponge, and a process for making the silicone rubber sponge. The silicone rubber sponge composition comprises (A) 100 parts by weight organopolysiloxane gum described by average structural unit RaSiO(4−a)/2, where R is a monovalent hydrocarbon group or haloalkyl and a is 1.8 to 2.3 and having a viscosity of 1,000,000 mPa·s or above at 25° C., (B) 1 to 400 parts by weight inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles, (D) 0.1 to 10 parts by weight liquid compound with a boiling point above room temperature, and (E) a curing agent in an amount sufficient to cure the composition.

Abstract: A silicone rubber sponge composition, a silicone rubber sponge, and a process for production thereof. The silicone rubber sponge composition, comprises (A) 100 parts by weight organopolysiloxane gum described by average structural unit RaSiO(4−a)/2, where R is a monovalent hydrocarbon group or haloalkyl and a is 1.8 to 2.3 and having a viscosity at 25° C. of 1,000,000 mPa·s or above, (B) 1 to 400 parts by weight inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles, (D) 0.1 to 10 parts by weight thermally decomposable blowing agent, and (E) a curing agent in an amount sufficient to cure the composition.

Abstract: A silicone rubber sponge composition, a silicone rubber sponge, and a process for making a silicone rubber sponge. The silicone rubber sponge composition comprises (A) 100 parts by weight of an organopolysiloxane gum described by average structural unit RaSiO(4-a)/2, where R is a monovalent hydrocarbon radical or haloalkyl and a is 1.95 to 2.05, (B) 1 to 400 parts by weight of an inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles (D) a mixture of (a) water-soluble silicone and (b) water in an amount such that the water in the mixture is equivalent to 0.01 to 10 parts by weight per 100 parts by weight of component (A), and (E) a curing agent in an amount sufficient to cure the composition.

Abstract: The clock reproducing device includes a control device which generates a control signal for decreasing a clock frequency difference between a transmitter and a receiver according to a clock information difference between the transmitting clock information and reproduced clock information and a receiving interval of the transmitting clock information, thereby the clock reproducing device controls a reproduced clock frequency of a reproduced clock output device. The clock reproducing device carries out appropriate frequency control regardless of the transmitting interval of the transmitting clock information received from the transmitter.

Abstract: A silicone rubber composition having improved mold release properties comprising (A) silicone rubber base compound, (B) organopolysiloxane having no aliphatic unsaturated groups, (C) higher fatty acid or higher fatty acid metal salt, (D) water, and (E) curing agent.

Abstract: The combination of an organic peroxide, a platinum-containing hydrosilation catalyst that is encapsulated within microparticles of a thermoplastic silicone resin, and acetylenic alcohol as the platinum catalyst inhibitor imparts a unique and desirable combination of properties to organosiloxane compositions curable by a platinum-catalyzed hydrosilylation reaction when the compositions contain a gum-type organopolysiloxane as the major ingredient. The compositions have long term storage stability and cure completely when molded. Cured articles molded from the compositions exhibit excellent mold release properties together with the absence of scorching, mold staining and surface tackiness.

Abstract: This invention pertains to a base fabric for an air bag coated with a silicone rubber which has excellent properties of folding for storage and sewing fabrication in addition to excellent adhesion to withstand impact with extension, especially extension at a high temperature.The surface of the fabric comprised of a polyamide fiber or polyester fiber is (I) coated with a thermosetting organopolysiloxane product comprised of (A) an unvulcanized organopolysiloxane rubber containing 2 or more alkenyl groups in a molecule, (B) silica in the form of a very fine powder, (C) an organopolysiloxane comprised of at least 5 silicon atoms in the main chain and further containing 1 or more trialkoxysilyl groups bonded with a silicon atom through a carbon atom, 1 or more epoxyalkyl groups and 3 or more hydrogen atoms bonded with a silicon atom, (D) a catalyst for the hydrosilylation reaction and (E) an organic solvent; followed by (II) a hardening process by heating.

Abstract: A pipe coupling comprises a cylindrical coupling member fabricated of shape memory alloy and a foil as a metallic member of low melting point attached to an internal surface of the cylindrical coupling member, a melting point of the foil being lower than that of materials of a pipe to be joined to the pipe coupling and of the coupling member. Further, a pipe coupling comprises a cylindrical coupling member fabricated of shape memory alloy, at least two pieces of ring protrusions formed on an internal surface of the cylindrical coupling member, and metallic member of low melting point which is attached to an internal surface of the cylindrical coupling member between the ring protrusions, a melting point of the metallic member of low melting point being lower than that of materials of a pipe to be joined and of the coupling member.

Abstract: A pipe coupling comprises a cylindrical coupling member fabricated of shape memory alloy and a foil as a metallic member of low melting point attached to an internal surface of the cylindrical coupling member, a melting point of the foil being lower than that of materials of a pipe to be joined to the pipe coupling and of the coupling member. Further, a pipe coupling comprises a cylindrical coupling member fabricated of shape memory alloy, at least two pieces of ring protrusions formed on an internal surface of the cylindrical coupling member, and metallic member of low melting point which is attached to an internal surface of the cylindrical coupling member between the ring protrusions, a melting point of the metallic member of low melting point being lower than that of materials of a pipe to be joined and of the coupling member.

Abstract: A scattered-light smoke detector having an improved shield structure. A detector circuit is provided on a printed circuit board which is disposed at an upper portion of a smoke detecting section. The smoke detecting section includes a planar base and a surrounding wall extending downwardly from a lower surface of the base and having an opening or openings which allows or allow smoke to enter therethrough. The surrounding wall defines a smoke detecting space therein. A light emitting element and a photodetector element which are disposed at positions where they are not opposite each other and optical axes thereof intersect each other at a predetermined angle and said photodetector element can receive light from the light emitting element scattered by smoke entering the smoke detecting space. The printed circuit board is attached on an upper surface of the base. A shield layer is interposed between said printed circuit board and said base.

Abstract: Molded silicone rubber unitary bodies of a carbon black containing portion and a portion containing substantially no carbon black which is obtained from a platinum catalyzed addition reaction composition are useful as keyboard pads, zebra-type connectors, and electrical joints. These molded bodies can be made by tightly contacting the uncured composition containing substantially no carbon black with a cured silicone rubber containing the carbon black and then heating to cure.

Abstract: A silicone elastomer having improved fatigue resistance is obtained by heat-curing a composition consists essentially of an organopolysiloxane gum having vinyl endblocking, an organopolysiloxane gum having from 0.1 to 2.0 percent of the organic radicals present as alkenyl radicals, an organopolysiloxane fluid having from 10 to 75 percent of the radicals present as alkenyl radicals, an organohydrogenpolysiloxane having at least 2 silicon-bonded hydrogen radicals in each molecule, a specific silica filler, and an organoperoxide.

Abstract: A light emitting unit and a photo sensing unit are separately arranged to face with each other, and a pulse light is emitted from the light emitting unit at every constant period, and the photo sensing unit receives the pulse light attenuated by a smoke, thereby detecting a fire. When a power source is turned on, a microcomputer in the photo sensing unit stores the first photo sensing data as an initial photo sensing data in a memory. The initial photo sensing data is fixedly stored and held and is not erased due to a temporary cut off of the power source. The photo sensing data is converted to correction photo sensing data using a correction ratio to perform the fouling correction and the fire is discriminated on the basis of the correction photo sensing data. The correction ratio is corrected when the correction period reaches 50 minutes. A correction amount of a single correction ratio is suppressed to a microvalue.

Abstract: A smoke detector comprising a light emitting section from which pulse light is radiated to a detection area with a predetermined period and a light receiving section which is disposed so as to be opposite to the light emitting section to receive the light for detecting a change caused in the detection area in the form of a change in photo-output level. The light receiving section has a monitor terminal for outputting a monitor signal corresponding to the photo-output level. When a measuring apparatus is externally connected to the monitor terminal, the supervision period is shortened as compared with the normal supervision period, so as to enable the monitor signal to be supervised substantially in real time, thereby facilitating an adjusting operation.

Abstract: When a transmitter receives an abnormal detection signal from a leaked gas alarm or the like, the transmitter starts the transmitting operation and repeatedly transmits the detection information together with the address information by a radio wave for a constant transmitting operation time interval. A receiver is of the intermittent reception type whereby the receiving operation is performed at every constant idle time, thereby preventing a consumption of a power source of a battery. When the transmitting radio wave is received at a timing of the intermittent reception, the receiving operation is continued and an alarm signal is generated on the basis of the last information which is transmitted due to the single transmitting operation, thereby allowing an alarm representing the leakage of gas to be generated and closing a gas shut-off valve, or the like.

Abstract: A printing head apparatus for impact dot printing and a method for manufacturing the apparatus, wherein those portions of the armature, printing wire and collar which are to be held in contact with each other and those other portions thereof which are to be set adjacent to each other are all bonded together by a brazing material in such a manner that one end of the printing wire is fitted to one end of the armature, and the collar penetrated by the printing wire is held in contact with said one end of the armature.

Abstract: A photoelectric smoke sensor wherein a photo diode having a junction capacitance of 100 pH or less is employed and a resistor having a high resistance value of the order of mega-ohms is connected in series with the photo diode to obtain a photo output through the resistor, so that the voltage of the photo output may be sufficient to be directly subjected to comparison by the comparator without high-gain amplification even if the driving current for a light emitting diode is reduced. This enables omission of a high-gain amplifier and accordingly enables omission of a shield case for the circuits of the sensor which has been required to eliminate noises.