Abstract: The switching power supply is provided with a voltage converter including a switching element for inputting a voltage from an input terminal, and has a spread spectrum function of varying a switching frequency in the switching element within a predetermined variation range. The switching power supply has a frequency setting unit that sets the variation range of the switching frequency and raises a lower limit value of the set variation range when a value of the voltage input from the input terminal is equal to or more than a predetermined threshold, and a signal generator that generates a control signal for driving the switching element by varying the switching frequency within the variation range set by the frequency setting unit.

Abstract: The switching power supply is provided with a voltage converter including a switching element for inputting a voltage from an input terminal, and has a spread spectrum function of varying a switching frequency in the switching element within a predetermined variation range. The switching power supply has a frequency setting unit that sets the variation range of the switching frequency and raises a lower limit value of the set variation range when a value of the voltage input from the input terminal is equal to or more than a predetermined threshold, and a signal generator that generates a control signal for driving the switching element by varying the switching frequency within the variation range set by the frequency setting unit.

Abstract: A DC/DC converter 10 of the present invention is provided with a constant-voltage power supply circuit 11; a SENSE+ terminal; a SENSE?/OCPSEL terminal pulled up to a predetermined voltage VL through a pull-up resistor R8; and a controller 14 for controlling the constant-voltage power supply circuit 11, wherein the controller 14 controls the output voltage Vout of the constant-voltage power supply circuit 11 on the basis of a potential difference between the SENSE+ terminal and the SENSE?/OCPSEL terminal, on the condition that the voltage of the SENSE?/OCPSEL terminal is lower than a threshold voltage, and sets predetermined control parameters on the basis of the voltage of the SENSE?/OCPSEL terminal, on the condition that the voltage of the SENSE?/OCPSEL terminal is equal to or higher than the threshold voltage.

Abstract: A DC/DC converter 10 of the present invention is provided with a constant-voltage power supply circuit 11; a SENSE+ terminal; a SENSE?/OCPSEL terminal pulled up to a predetermined voltage VL through a pull-up resistor R8; and a controller 14 for controlling the constant-voltage power supply circuit 11, wherein the controller 14 controls the output voltage Vout of the constant-voltage power supply circuit 11 on the basis of a potential difference between the SENSE+ terminal and the SENSE?/OCPSEL terminal, on the condition that the voltage of the SENSE?/OCPSEL terminal is lower than a threshold voltage, and sets predetermined control parameters on the basis of the voltage of the SENSE?/OCPSEL terminal, on the condition that the voltage of the SENSE?/OCPSEL terminal is equal to or higher than the threshold voltage.

Abstract: A mold is provided in which a molding portion, formed between joint surfaces of upper and lower molds superimposed one upon the other, is filled with UV curable resin after arranging a coating formation portion of an optical fiber in the molding portion, the coating formation portion is coated with the UV curable resin when the resin is cured by irradiating light thereto from outside, and a shading plate is arranged in the periphery of the molding portion. In a case equipped with the mold, there is provided a mirror or a lens for reflecting UV light to UV curable resin.

Abstract: A coating device for coating a coating solution on a web has a roller and a weir which partially constructs a solution store space. In the solution store space the coating solution is stored. When the web sequentially moves in a direction, the roller rotates and the solution in the solution store space is supplied on the web. Thereby a part of the solution overflows the weir such that another part of the solution may remain on the web to have a constant width in a widthwise direction of the web. A drying device has plural drying zones in which the web is fed after the coating of the coating solution. One of the drying zones is neighbored to the coating device. A top of the plural drying zones is constructed of a blow regulation member so as to confront to the solution on the web. The blow regulation member has holes through which is exhausted a gas evaporated from the layer of the solution on the web.

Abstract: A coating device for coating a coating solution on a web has a roller and a weir which partially constructs a solution store space. In the solution store space the coating solution is stored. When the web sequentially moves in a direction, the roller rotates and the solution in the solution store space is supplied on the web. Thereby a part of the solution overflows the weir such that another part of the solution may remain on the web to have a constant width in a widthwise direction of the web. A drying device has plural drying zones in which the web is fed after the coating of the coating solution. One of the drying zones is neighbored to the coating device. A top of the plural drying zones is constructed of a blow regulation member so as to confront to the solution on the web. The blow regulation member has holes through which is exhausted a gas evaporated from the layer of the solution on the web.

Abstract: A coating device for coating a coating solution on a web has a roller and a weir which partially constructs a solution store space. In the solution store space the coating solution is stored. When the web sequentially moves in a direction, the roller rotates and the solution in the solution store space is supplied on the web. Thereby a part of the solution overflows the weir such that another part of the solution may remain on the web to have a constant width in a widthwise direction of the web. A drying device has plural drying zones in which the web is fed after the coating of the coating solution. One of the drying zones is neighbored to the coating device. A top of the plural drying zones is constructed of a blow regulation member so as to confront to the solution on the web. The blow regulation member has holes through which is exhausted a gas evaporated from the layer of the solution on the web.

Abstract: An optical fiber coating mold which is comprised of upper and lower molds having joint surfaces, a molding portion where a coating formation portion of an optical fiber can be arranged and a supply passage for supplying UV curable resin being formed between the joint surfaces of the upper and lower molds when the joint surfaces are superimposed one upon the other, the molding portion being filled with UV curable resin after arranging the coating formation portion of the optical fiber in the molding portion, the coating formation portion of the optical fiber being coated with the UV curable resin when the UV curable resin is cured by irradiating light thereto from outside, in which a shading plate is arranged in the periphery of the molding portion. In a case equipped with such a mold, there is provided a mirror or a lens for reflecting UV light to UV curable resin, the mirror or the lens being provided so as to secure the field of view for observation of the interior through an observation window of the case.

Abstract: A system is provided for fusion splicing at least one pair and, more typically a plurality of pairs (e.g., 24 pairs), of optical fibers together. The system includes a pair of electrodes and a controller. The optical fibers are positioned between the pair of electrodes. In this regard, the electrodes are capable of passing an electric current therebetween to create an electric arc capable of heating an end of each of the optical fibers. The controller is capable of controlling the electrodes to thereby pass the current therebetween to create the electric arc. Advantageously, the controller is capable of controlling the electrodes to pass an initial current to thereby create and maintain an initial electric arc and thereafter pass a processing current to thereby create and maintain a processing electric arc, where the initial current is higher than the processing current.

Abstract: An optical fiber coating forming device forms a coating of an ultraviolet light hardening type in an optical fiber by precisely controlling an ultraviolet light output of a light source. The optical fiber coating forming device has a light source (2) for irradiating ultraviolet light to resin for coating formation molded to a coating removing portion (4) of an optical fiber core wire (3), a light receiver (5) for detecting intensity of the ultraviolet light by receiving the ultraviolet light irradiated to the resin for coating formation from the light source (2), and an environmental sensor (20) for detecting environmental information. The environmental sensor (20) includes at least a temperature sensor (6) and selectively includes a humidity sensor (7) and an atmospheric pressure sensor (8).

Abstract: An optical fiber coating device that recoats a coating removed portion of an optical fiber with light-curing resin has an observation window through which a mold inside of a shielding lid that covers the mold can be confirmed in a state where the shielding lid remains closed. There is provided an open/close lid that can open/close the observation window. An optical shielding guard plate is provided around the observation window. A filter that cuts off the external light having a specific wavelength is provided on the observation window. There is provided a photo sensor that can detect the amount of light of a light source that irradiates a light onto the light-curing resin, and the amount of light can be automatically adjusted on the basis of the detected result of the photo sensor. An alarm that urges to exchange the light source is raised on the basis of the detected result of the photo sensor. There is provided a TV camera that can capture the interior of the mold and other portions to be observed.

Abstract: A coating device for coating a coating solution on a web has a roller and a weir which partially constructs a solution store space. In the solution store space the coating solution is stored. When the web sequentially moves in a direction, the roller rotates and the solution in the solution store space is supplied on the web. Thereby a part of the solution overflows the weir such that another part of the solution may remain on the web to have a constant width in a widthwise direction of the web. A drying device has plural drying zones in which the web is fed after the coating of the coating solution. One of the drying zones is neighbored to the coating device. A top of the plural drying zones is constructed of a blow regulation member so as to confront to the solution on the web. The blow regulation member has holes through which is exhausted a gas evaporated from the layer of the solution on the web.

Abstract: An optical fiber resin coating apparatus having an ultraviolet flash lamp used for coating an optical fiber by an ultraviolet curing resin, a lamp lighting circuit for making the ultraviolet flash lamp emit light, and a control circuit for controlling this lamp lighting circuit. The control circuit detects the intensity and emission time of ultraviolet light emitted from the ultraviolet flash lamp by an ultraviolet sensor and supplies a voltage and excitation time to the power source for exciting the ultraviolet flash lamp based on this. As the ultraviolet light source, at least one ultraviolet laser diode or ultraviolet light emitting diode may be used instead of an ultraviolet flash lamp. The ultraviolet light source may be arranged to emit ultraviolet light so that the coating portion of the ultraviolet curing resin exhibits an inclined profile where the intensity of the ultraviolet light gradually changes according to the position.

Abstract: Crude green tea is pulverized with a ball mill to screen a microfine powder of 1 micron or less with a sieve. The screened green tea microfine powder is spread in a flat box, on which distilled water is sprayed to a final moisture content of 7.5 to 8.0%, followed by agitation. The flat box is arranged in an infrared irradiation chamber, where the green tea microfine powder is heated with infrared rays at a temperature of 40° C. to 60° C. for 130 minutes to 180 minutes. In such manner, the microfine powder with a high ratio of nutrient digestion and absorption and with high active oxygen-eliminating potency due to SOD contained therein can be provided, together with a method for producing the same.

Abstract: An optical fiber coating device that recoats a coating removed portion of an optical fiber with light-curing resin has an observation window through which a mold inside of a shielding lid that covers the mold can be confirmed in a state where the shielding lid remains closed. There is provided an open/close lid that can open/close the observation window. An optical shielding guard plate is provided around the observation window. A filter that cuts off the external light having a specific wavelength is provided on the observation window. There is provided a photo sensor that can detect the amount of light of a light source that irradiates a light onto the light-curing resin, and the amount of light can be automatically adjusted on the basis of the detected result of the photo sensor. An alarm that urges to exchange the light source is raised on the basis of the detected result of the photo sensor. There is provided a TV camera that can capture the interior of the mold and other portions to be observed.

Abstract: A method of forming a coating and an apparatus for forming a coating on an optical fiber capable of improving the work speed in recoating a coating forming portion of the optical fiber are provided. A coating removed part of a coated optical fiber, which is the portion where a coating of the optical fiber is formed, is set in a mold. A light-curing resin is provided on the coating removed part. Then, with the light-curing resin heated to the glass transition temperature thereof by a Peltier element, a heater and a temperature control unit, a light for curing is irradiates from a light source to cure the light-curing resin.

Abstract: An optical fiber coating forming device forms a coating of an ultraviolet light hardening type in an optical fiber by precisely controlling an ultraviolet light output of a light source. The optical fiber coating forming device has a light source (2) for irradiating ultraviolet light to resin for coating formation molded to a coating removing portion (4) of an optical fiber core wire (3), a light receiver (5) for detecting intensity of the ultraviolet light by receiving the ultraviolet light irradiated to the resin for coating formation from the light source (2), and an environmental sensor (20) for detecting environmental information. The environmental sensor (20) includes at least a temperature sensor (6) and selectively includes a humidity sensor (7) and an atmospheric pressure sensor (8).

Abstract: A boiler tube protector having a cylindrical or semi-cylindrical shape and adapted to be attached around an outer peripheral face of a boiler tube with mortar, which boiler tube protector includes a plurality of ceramic bodies closely arranged along their parting planes, wherein the parting planes includes a restraining portion for restraining slippage of each of the ceramic bodies.

Abstract: A method of attaching a boiler tube protectors having a cylindrical or semi-cylindrical shape around an outer peripheral face of a boiler tube with mortar, which boiler tube protectors, are a plurality of ceramic bodies closely arranged along their parting planes, wherein the parting planes includes means for restraining slippage of each of the ceramic bodies along the parting planes.