Abstract: A nail gun includes a moveable cylinder, an air collecting chamber and a main passage. An air passage includes a trigger valve; an air-in passage formed in the trigger valve connecting between an air collecting chamber and a main passage; an air-out passage formed in the trigger valve connecting between the main passage and external atmosphere; a stopper ring formed at an outside surface of the cylinder and slidably attached in the gun body; an air tank formed at a stopper ring; and a main chamber formed at a bottom portion of the stopper ring. The main chamber is capable of collecting the high pressure air via the air-in passage to actuate the cylinder to move up while the valve bar is pressed, and exhausting the high pressure air via the air-out passage to actuate the cylinder to move down for reposition while the valve bar is released.

Abstract: A nail gun includes an air concentrating chamber and a main air passage, and the trigger valve is disposed between the air concentrating chamber and the main air passage. The trigger valve includes a valve body, a shuttle valve nested in the valve body, a valve base integrated with the valve body, and a valve bar being capable of pressed and released. When the valve bar is pressed to actuate the high pressure air in the air concentrating chamber to drive the shuttle valve to downwardly move, for guiding the high pressure air in the air concentrating chamber into the main air passage to provide necessary energy for hitting nails. When the valve bar is released, the high pressure air in the main air passage are exhausted, so as to actuate the high pressure air in the air concentrating chamber to drive the shuttle valve to upwardly move to reposit.

Abstract: A method for surface treatment is disclosed. The method is achieved by forming a MgO film on a metal surface through anode processing of Mg or Mg alloy in an alkaline solution. The alkaline solution includes a hydroxide, a thickening agent, and a film adjusting agent. As the method is performed, the target object is immersed in the alkaline solution, and the target object is connected to an anode with an average electric current density of 1˜5 A/dm, at a temperature of 0˜30° C., and within a time period of 10˜120 minutes to form a film of 5˜25 ?m. The forming rate of the film of the method of the present invention is fast, and the formed film is of little stress.

Abstract: A portable storage device comprises a housing having a first opening, a first directing portion and a second opening, and a main body having a storage portion, a connecting portion corresponding to the first opening, a second directing portion corresponding to the first directing portion, and a hanging portion corresponding to the second opening. The main body is slidably located inside the housing and is slidable between a first position and a second position. When the main body is situated at the first position, the connecting portion is exposed outside the first opening, and the hanging portion is hidden in the housing. The storage device is at a status of being used. When the main body is situated at the second position, the connecting portion is hidden in the housing, and the hanging portion is exposed outside the second opening. The storage device is at a status of being housed.

Abstract: A sanitary undergarment includes a panty element having a front panel and a rear panel and a crotch provided between the front panel and the rear panel. A sanitary napkin is disposed on the crotch of the panty element, for engaging onto private parts of users. One or more engaging members are attached onto the front panel and the rear panel of the panty element respectively, and engageable with each other, to attach the panty element onto the users, and to attach the sanitary napkin onto the users without engaging users' legs through the panty element.

Abstract: A portable storage device, such as a USB portable disk drive, comprises a main body and a rotation arm. The main body comprises a storage portion, a connection portion and a back portion. The connection portion comprises a first fastening portion, and the back portion comprises a second fastening portion. The rotation arm is rotatably connected to the main body, and the rotation arm has a third fastening portion corresponding to the first fastening portion and the second fastening portion. When the rotation arm is situated at a first position, the first fastening portion is engaged with the third fastening portion, and the portable storage device is at a status of being housed. When the rotation arm is situated at the second position, the second fastening portion is engaged with the third fastening portion, and the portable storage device is at a status of being used.

Abstract: A portable storage device, such as a USB portable disk drive, comprises a main body and a flexible casing. The main body has a connecting portion and a lamp portion. The flexible casing is attached to the main body and encircles the connecting portion. When the flexible casing is compressed and situated at a first position, the connecting portion is exposed outside the flexible casing, and the portable storage device is at a status of being used. When the flexible casing is not compressed and is situated at a second position, the connecting portion is hidden in the flexible casing, and the portable storage device is at a status of being housed. The lamp portion can be a light emitting diode (LED) for showing the operating status of the portable storage device, and a light-directing portion can be located at the outside of the lamp portion.

Abstract: The present invention relates to an explosion-proof safety structure for column shape lithium battery, particularly relates to a safe and explosion-preventing structure which prevents the battery from ignition or explosion caused by the condition of overcharging described as follows: while the lithium battery is under overcharging condition, a sudden rise of the battery internal temperature takes place and the pressure increases; at the beginning of the sudden rise of temperature, the internal resistance value of the positive temperature coefficient of resistivity board redoubles to slow down the input of current; when the temperature keeps on rising, the electrolyte starts to gasify so as to increase the internal pressure of the battery up to a level which exceeds what the breaker sheet thin portion can take, the thin portion of the breaker sheet breaks to cause an open charging circuit and the charging activity stops; however, the battery internal pressure can not be released, which once exceeds the break p

Abstract: A portable storage device, such as a USB portable disk drive, comprises a main body and a flexible casing. The main body has a connecting portion and a lamp portion. The flexible casing is attached to the main body and encircles the connecting portion. When the flexible casing is compressed and situated at a first position, the connecting portion is exposed outside the flexible casing, and the portable storage device is at a status of being used. When the flexible casing is not compressed and is situated at a second position, the connecting portion is hidden in the flexible casing, and the portable storage device is at a status of being housed. The lamp portion can be a light emitting diode (LED) for showing the operating status of the portable storage device, and a light-directing portion can be located at the outside of the lamp portion.

Abstract: A portable storage device comprises a housing having a first opening, a first directing portion and a second opening, and a main body having a storage portion, a connecting portion corresponding to the first opening, a second directing portion corresponding to the first directing portion, and a hanging portion corresponding to the second opening. The main body is slidably located inside the housing and is slidable between a first position and a second position. When the main body is situated at the first position, the connecting portion is exposed outside the first opening, and the hanging portion is hidden in the housing. The storage device is at a status of being used. When the main body is situated at the second position, the connecting portion is hidden in the housing, and the hanging portion is exposed outside the second opening. The storage device is at a status of being housed.

Abstract: A portable storage device, such as a USB portable disk drive, comprises a main body and a rotation arm. The main body comprises a storage portion, a connection portion and a back portion. The connection portion comprises a first fastening portion, and the back portion comprises a second fastening portion. The rotation arm is rotatably connected to the main body, and the rotation arm has a third fastening portion corresponding to the first fastening portion and the second fastening portion. When the rotation arm is situated at a first position, the first fastening portion is engaged with the third fastening portion, and the portable storage device is at a status of being housed. When the rotation arm is situated at the second position, the second fastening portion is engaged with the third fastening portion, and the portable storage device is at a status of being used.

Abstract: The present invention relates to an explosion-proof safety structure for column shape lithium battery, particularly relates to a safe and explosion-preventing structure which prevents the battery from ignition or explosion caused by the condition of overcharging described as follows: while the lithium battery is under overcharging condition, a sudden rise of the battery internal temperature takes place and the pressure increases; at the beginning of the sudden rise of temperature, the internal resistance value of the positive temperature coefficient of resistivity board redoubles to slow down the input of current; when the temperature keeps on rising, the electrolyte starts to gasify so as to increase the internal pressure of the battery up to a level which exceeds what the breaker sheet thin portion can take, the thin portion of the breaker sheet breaks to cause an open charging circuit and the charging activity stops; however, the battery internal pressure can not be released, which once exceeds the break p

Abstract: A method for treating aluminum to enhance corrosion resistance of its surface. The chemical conversion coating aluminum and aluminum alloys are exposed to an aqueous PU solution to form a PU film on the surface. The aqueous PU solution comprises: (i) 5-15% weight of water dispersable polyurethane resin, (ii) 0.1-56 weight of cross-linking agent, and (iii) 80-94.9% weight of water.

Abstract: A rare-earth doped glass waveguide is optically pumped to produce superfluorescent light. The waveguide is formed in a glass substrate. The pump light is input to a first end of the optical waveguide, and the output is emitted from the other end. A grating formed on the waveguide near the output end reflects the pump light to separate the pump light from the output light.

Abstract: An integrated optics chip eliminates problems caused by polarization cross coupling in fiber optic rotation sensors without requiring time consuming and expensive alignment of the axes of the optical fiber sensing coil and the optical waveguides formed in the integrated optics chip. A substrate formed of an optically active material has slots formed therein for mounting optical fibers to the substrate. An optical waveguide is formed in the integrated optics chip to guide optical signals along a selected axis of propagation such that an end wall of the slot includes an end surface of the optical waveguide. The end surface of the optical waveguide is formed to make an angle with the direction of propagation of light in the optical waveguide to reduce the amount of light reflected at the end surface of the optical waveguide.

Abstract: This invention is a frequency shifter for receiving an optical carrier signal input and producing an output including a sideband that is shifted in frequency from the carrier. The frequency shifter includes an optical waveguide formed in a substrate of an electro-optically active material such as lithium niobate. A plurality of electrodes formed on the substrate cooperate with a signal generator to apply two perpendicular electric fields to the optical waveguide. The resultant of the two fields is a rotating electric field which produces a rotating birefringence in the optical waveguide. The rotating birefringence acts as a rotating wave plate, which shifts the frequency of optical signals input to the optical waveguide. The wave plate is preferably a half wave plate, which converts all of the input optical energy into the sideband.

Abstract: The cladding and a portion of the core of a length of optical fiber are removed to form an interaction region. A form birefringent stack is positioned on the exposed core. The refractive index of the stack for polarizations parallel to the plane of the interaction region is approximately equal to the refractive index of the fiber core so that these polarizations radiate from the fiber. The refractive index of the stack for the polarization normal to the plane fo the interaction region is approximately equal to the refractive index of the cladding so that this polarization remains guided by the fiber. A photodetector forms an error signal from the polarization radiated from the fiber, and control circuitry processes the error signal to drive a polarization controller that adjusts the polarization of light input to the polarizer to minimize the error signal.

Abstract: A polarizing optical fiber has a core formed of a plurality of layers of dielectrics having different refractive indices. The dielectric layers form a composite structure having different refractive indices for light of different polarizations. The differing refractive indices cause the polarization states of light guided by the fiber to be non-degenerate so that energy ordinarily will not couple from one polarization to the other. The fiber includes a cladding that may have a refractive index either less than both core indices to provide a polarization maintaining fiber or greater than or equal to one of the core indices to provide a polarizing fiber. The method of fabrication of the layered core form birefringent optical fiber includes forming a structure of a plurality of layers of the dielectrics, heating the structure to form a monolith, stretching the monolith to form the fiber core, and adding the cladding to the core.

Abstract: The cladding and a portion of the core of apparatus of a length of optical fiber are removed to form an interaction region where the fiber will not guide a light wave. A metal thin layer placed on the exposed core and a portion of the cladding. Polarizations perpendicular to the metal film couple into the metal film to form a surface plasma wave that propagates parallel to the fiber while parallel polarizations radiate through the metal film. The surface plasma wave couples energy back into the fiber so that the throughput of the polarizer is only the perpendicular polarization component. A photodetector forms an error signal from the polarization radiated from the fiber, and control circuitry processes the error signal to drive a polarization controller that adjusts the polarization of light input to the polarizer to minimize the error signal and maximize the intensity of the desired polarization output from the polarizer.