Abstract: A hub assembly for a bicycle includes a shaft (12), a hub body (40), a driven ring (43), a drive seat (10), a rotation ring (20), a plurality of pawl members (22), a plurality of push balls (23), a mounting sleeve (32), a damping ring (30), and a plurality of tension adjusting mechanisms (37). Thus, each of the pawl members is driven by each of the push balls in a rolling manner so that each of the pawl members is moved smoothly and stably without incurring sliding friction, thereby facilitating operation of the drive seat. In addition, each of the tension adjusting mechanisms is used to adjust the damping force of the damping ring, so that the damping force of the damping ring is distributed evenly.

Abstract: A hub for a bicycle includes a shaft, a hub body, a ratchet wheel, a damper, a drive seat, and a plurality of pawl members. Thus, when the drive seat is rotatable backward, the locking detent of each of the pawl members is detached from the oneway ratchet teeth of the ratchet wheel constantly, so that each of the pawl members will not touch the ratchet wheel to prevent from incurring a noise. In addition, when the drive seat is rotatable backward, the hub body is separated from the drive seat, and rotation of the hub body will not drive the drive seat and the pedal to prevent the pedal from being driven when the hub body is rotated backward.

Abstract: A hub for a bicycle includes a shaft, a hub body, a ratchet wheel, a damper, a drive seat, a plurality of pawl members, and a plurality of elastic plates. The ratchet wheel has a plurality of oneway ratchet teeth. The drive seat has a support base which has a plurality of receiving slots. Each of the pawl members has a locking detent. Thus, when the pedal is driven backward (and the drive seat is rotated backward), each of the pawl members is fully hidden in the respective receiving slot, and the locking detent of each of the pawl members is detached from the oneway ratchet teeth constantly, so that each of the pawl members will not touch the ratchet wheel when the pedal is driven backward to prevent from incurring a noise.

Abstract: In a monitoring method of an exposure apparatus, a top critical dimension (TCD) and a bottom critical dimension (BCD) of the test pattern formed on a photo-sensitive material layer are measured. A dose deviation (?E) and a focus deviation (?F) are calculated by following equations: TCD+BCD=??E+(TCD0+BCD0) TCD?BCD=?1?F+?2?F3 Here, ?, ?1 and ?2 are constants, ?E=E?E0, ?F=F?F0, E represents a real exposure dose, F represents a real exposure focus, E0 represents a dose defined when a middle critical dimension of the test pattern is equal to a predetermined value, F0 represents a focus defined when TCD of the test pattern is equal to BCD thereof, and TCD0 and BCD0 are theoretical values in case of E0 and F0.

Abstract: A hub for a bicycle includes a shaft (12), a hub body (40), a ratchet wheel (43), a drive seat (10), a support ring (15), a rotation ring (21), a plurality of pawl members (22), a stop bushing (121), a limit ring (30) and a damper (33). Thus, when the drive seat is rotated backward by the pedal, each of the pawl members is retracted into the respective receiving slot (212) of the rotation ring to disengage the oneway ratchet teeth (43) of the ratchet wheel, so that each of the pawl members is spaced from and will not touch the ratchet wheel when the pedal is driven backward to prevent from producing a noise when the pedal is driven backward.

Abstract: A lockable torque-limiting driver includes a body and a sleeve received in a sleeve chamber of the body and secured therein by recesses inside the body. The sleeve is provided with projecting edges on the outer wall to be respectively fitted in the recesses of the body, plural recessed grooves at the inner wall for fixing an upper cam, and female threads at the inner wall to be screwed with the male threads of a torque-limiting member, further disposed with plural positioning serrations at topside and a center chamber inside. The upper cam and a lower cam respectively have one-way serrations to be mutually engaged. The torque-limiting member is fixed with positioning projections to be actuated to move on the positioning serrations of the sleeve and give out sounds by which a user can know a torque limiting extent desired.

Abstract: A television (TV) receiver includes a wireless module, a database, a user identification module and a channel selecting module. The wireless module receives a wireless signal carrying an identification (ID) data of a specific user. The database stores channel selecting information corresponding to a plurality of users. The user identification module retrieves channel selecting information corresponding to the specific user from the database according to the ID data of the specific user. The channel selecting module selects a channel according to the channel selecting information corresponding to the specific user. An associated TV system and TV control method are also provided.

Abstract: A rear hub for a bicycle includes a mandrel, a hub body, a first locking nut, a freewheel, an auxiliary threaded post, and a second locking nut. The mandrel has a primary threaded section and a secondary mounting portion which has a diameter smaller than that of the primary mounting portion. Thus, the secondary mounting portion of the mandrel has a smaller diameter so that the freewheel has a smaller diameter to reduce the tooth number of the driven gear to reduce the tooth number of the chainwheel to reduce the diameter of the chainwheel so as to reduce the whole volume and weight of the bicycle.

Abstract: A hub for a bicycle includes a shaft, a hub body rotatably mounted on the shaft, a drive seat rotatably mounted on the shaft and engaged with the hub body, and a self-lubricating bearing mounted between the drive seat and the shaft. The self-lubricating bearing has a radially and outwardly extending limit flange rested on the drive seat. Thus, the self-lubricating bearing has an inner wall contacting with an outer wall of the shaft completely and an outer wall contacting with an inner wall of the drive seat completely, so that the external force applied on the self-lubricating bearing is distributed evenly and smoothly to prevent the self-lubricating bearing from being distorted or deformed due to a stress concentration, thereby enhancing the lifetime of the self-lubricating bearing.

Abstract: A hub for a bicycle includes a shaft, a hub body, a ratchet wheel, a damper, a drive seat, a plurality of pawl members, and a plurality of elastic plates. The ratchet wheel has a plurality of oneway ratchet teeth. The drive seat has a support base which has a plurality of receiving slots. Each of the pawl members has a locking detent. Thus, when the pedal is driven backward (and the drive seat is rotated backward), each of the pawl members is fully hidden in the respective receiving slot, and the locking detent of each of the pawl members is detached from the oneway ratchet teeth constantly, so that each of the pawl members will not touch the ratchet wheel when the pedal is driven backward to prevent from incurring a noise.

Abstract: A rear hub for a bicycle includes a shaft, a hub body mounted on the shaft and provided with two spoke mounting portions and a mounting ring, a driven member located beside the mounting ring, a brake disc mounted on the mounting ring, and a drive member engaged with the driven member. Thus, the drive member and the brake disc are located at the same side of the hub body, so that one side of the hub body is provided with the drive member and the brake disc, and the other side of the hub body is disposed at a vacant state to facilitate a rider using the other side of the hub body to have a greater inclined angle without being obstructed by the drive member and the brake disc so as to perform acrobatics easily and smoothly.

Abstract: A bicycle seat includes an upright post, a support base mounted on an upper end of the upright post, a rotation base rotatably mounted on the support base, a seat body movably mounted on the rotation base, a retaining member mounted on the seat body, and two locking bolts in turn extending through the support base, the seat body and the retaining member to clamp the seat body between the rotation base and the retaining member. Thus, after each of the two locking bolts is unscrewed, the seat body is movable forward and backward relative to the upright post so as to adjust the position of the seat, and is rotatable relative to the upright post so as to adjust the inclined angle of the seat.

Abstract: A multi-functional air circulation system includes a bottom base, a flow-splitting base, a filter and a main engine. The bottom base has a lower flow-guiding surface, a net, and a space used to contain diverse improving agents. The flow-splitting base is fixed on the bottom base, including an inner flow-guiding surface to rush air flow generated by a blade member down to the bottom base. The filter is laid at an exit of the inner flow-guiding surface, composed of two filter bases forming a room between them for containing aromatic powder, etc. The main engine includes a motor having its shaft fixed with a blade member, and a control system. The motor is installed in a rear shell combined with a front shell. Air is sucked in through the rear shell to run through an ornamental shell and the flow-splitting base to enter a room. The main engine and the bottom base can also be assembled to work independently.

Abstract: A bicycle frame includes a mandrel, a hub and freewheel assembly, two bearings, two first locking nuts, two fork end members, and two second locking nuts. Thus, when each of the first locking nuts is screwed onto the respective first threaded section of the mandrel and when each of the second locking nuts is screwed onto the respective second threaded section of the mandrel and rested on the respective fork end member, the respective fork end member will not be driven by the respective second locking nut to push the respective first locking nut to prevent the respective bearing from being compressed by the respective first locking nut so as to maintain the normal operation of the respective bearing.

Abstract: A hub for a bicycle includes a shaft, a hub body rotatably mounted on the shaft, a drive seat rotatably mounted on the shaft and engaged with the hub body, and a self-lubricating bearing mounted between the drive seat and the shaft. Thus, the self-lubricating bearing has an inner wall contacting with an outer wall of the shaft completely and an outer wall contacting with an inner wall of the drive seat completely, so that the external force applied on the self-lubricating bearing is distributed evenly and smoothly to prevent the self-lubricating bearing from being distorted or deformed due to a stress concentration, thereby enhancing the lifetime of the self-lubricating bearing.

Abstract: A rear hub for a bicycle includes a shaft, a hub body mounted on the shaft, two races each mounted between the shaft and the hub body, two tapered bearings each mounted between the shaft and a respective race, a protruding pull block mounted on a first end of the shaft and rested on a first tapered bearing, and a locking nut secured on a second end of the shaft and rested on a second tapered bearing. Thus, the user only needs to screw the locking nut onto the shaft to pull the pull block to clamp the tapered bearings and the respective races, so that the rear hub is assembled easily, quickly and conveniently.

Abstract: A method for making polysiloxane lenses includes the steps of preparing a first mold block having a land area and a second mold block having a land area in which a plurality of independent cavities are formed, keeping the first mold block away from the second mold block, injecting fluid polysiloxane into every cavity of the second mold block, closing the land area of the first mold block on the land area of the second mold block, heating the first mold block and the second mold block to have the fluid polysiloxane in the cavities of the second mold block be hardened into individual polysiloxane lenses, and separating the first mold block from the second mold block and removing the hardened polysiloxane lenses out of the cavities of the second mold block.

Abstract: The present invention provides a system and method for TV frame capture and printing. The system includes a tuner, a processor, a memory, an image compression engine, a display unit, a connecting interface, an interface controller, and a printer. The tuner receives TV signals, and the processor processes the TV signal to generate a TV frame, which is stored in the memory. The image compression engine is controlled by the processor to read a target frame from the memory, and processes the target frame to generate an image file, which is also stored in the memory. The display unit displays the TV frame and image file. The interface controller controls the connecting interface, which is connected to the printer. The printer communicates with the processor through an image transmission standard to receive and print the image file.

Abstract: A hub assembly for a bicycle includes a hub body provided with a mounting portion, a freewheel slidably mounted on the mounting portion of the hub body, and at least one retainer mounted on the mounting portion of the hub body and rested on the freewheel to retain the freewheel on the mounting portion of the hub body to prevent the freewheel from being detached from the mounting portion of the hub body. Thus, the freewheel is slidable on the mounting portion of the hub body to change the position of the freewheel relative to the chainwheel, so that the freewheel is in line with the chainwheel, and the chain is perpendicular to the hub body constantly without incurring deflection.

Abstract: A ceramic chip antenna for transmitting and receiving wireless signals. The antenna includes a substrate and a conductor. The substrate is made of sintered ceramic material with a low dielectric loss and a high dielectric constant. A pair of concavities is cut from both longitudinal ends of the substrate. The conductor is made of metal with a high Q factor as well as a good anti-oxidization property, being formed on surfaces of the substrate by means of mask etching or printing technology. The conductor has a circuit portion disposed on surfaces of the substrate in a meandered or helical manner, and two conducting electrodes disposed at the two concavities of the substrate and connected by the circuit portion.