Abstract: A linear guideway, a sliding module thereof, and a circulation seat thereof are provided. The circulation seat has two sliding channels and can be assembled to a slider. The circulation seat includes two turning segments, two outer rail segments, and two inner rail segments. Each of the two turning segments has a layout surface arranged adjacent to the slider and an oil multi-channel recessed in the layout surface and being in spatial communication with the two sliding channels. Two ends of each of the two outer rail segments are respectively connected to the two turning segments. Two ends of each of the two inner rail segments are respectively connected to the two turning segments. Each of the two outer rail segments is connected to one of the two inner rail segments through the two turning segments so as to jointly form one of the two sliding channels.

Abstract: A dust-proof mechanism includes a sliding module, two lower dust-proof members disposed on the sliding module, and two end caps respectively fixed onto two ends of the sliding module. Two distal portions of each of the two lower dust-proof members protrude from the sliding module. Two slots of one of the two end caps respectively correspond in position along a sliding direction to the two slots of another one of the two end caps. Any two of the slots respectively belonging to the two end caps and arranged along the sliding direction are respectively sleeved at the two distal portions of one of the two lower dust-proof members, and are cooperated with the sliding module to jointly have a total length greater than a length of the corresponding lower dust-proof member, such that each of the two lower dust-proof members is slidable along the sliding direction.

Abstract: A circulation seat includes two turning segments, two outer rail segments, and two inner rail segments. Each of the two turning segments has two outer arced sub-segments each having a first radius and two inner arced sub-segments respectively connected to the two outer arced sub-segments. Each of the inner arced sub-segments has a second radius being within a range from 90% to 110% of the first radius. Two ends of each of the two outer rail segments are respectively connected to two of the outer arced sub-segments respectively belonging to two of the turning segments. Two ends of each of the two inner rail segments are respectively connected to two of the inner arced sub-segments respectively belonging to two of the turning segments. Each of the two outer rail segments is in spatial communication with one of the two inner rail segments through the two turning segments.

Abstract: A linear guideway and an end module thereof are provided. The end module includes a cap and a circulation sheet. The cap includes a transverse segment and two lateral segments that are respectively connected to two ends of the transverse segment. The circulation sheet is engaged in the transverse segment and the two lateral segments so as to jointly define an oil injection channel. The circulation sheet and the two lateral segments jointly define a plurality of turning channels. When a lubricating oil is injected into the oil injection channel of the end module, the circulation sheet absorbs a part of the lubricating oil and expands so as to be tightly fitted to the transverse segment and the two lateral segments of the cap.

Abstract: An upper dustproof member of a linear guideway includes a connection segment and two floating dustproof segments that are respectively connected to two opposite sides of the connection segment. Each of the two floating dustproofing segments has a carrying bar and at least one rib that is connected to the carrying bar. In each of the two floating dustproofing segments, the carrying bar has two end portions each having a bevel arranged away from the at least one rib. When the bevels of the end portions of the upper dustproof member are respectively inserted into four tolerance slots of two end caps, each of the end portions and the corresponding end cap have a tolerance gap therebetween, so that a slanting surface of each of the bevels abuts against the corresponding tolerance slot, and each of the end portions is deformable toward the corresponding tolerance gap.

Abstract: An upper dustproof member of a linear guideway includes a connection segment and two floating dustproof segments that are respectively connected to two opposite sides of the connection segment. Each of the two floating dustproofing segments has a carrying bar and at least one rib that is connected to the carrying bar. In each of the two floating dustproofing segments, the carrying bar has two end portions each having a bevel arranged away from the at least one rib. When the bevels of the end portions of the upper dustproof member are respectively inserted into four tolerance slots of two end caps, each of the end portions and the corresponding end cap have a tolerance gap therebetween, so that a slanting surface of each of the bevels abuts against the corresponding tolerance slot, and each of the end portions is deformable toward the corresponding tolerance gap.

Abstract: A linear guideway, a sliding module thereof, and a circulation seat thereof are provided. The circulation seat has an inherently one-piece structure, which includes two turning portions, a middle retaining portion, and two lateral retaining portions. The middle retaining portion has a two-stepped structure, which includes a connection bar and a limiting bar that is connected to the connection bar. The connection bar is connected to and arranged between the two turning portions, and a distance between two long lateral surfaces of the connection bar gradually increases along a direction away from the limiting bar. The two lateral retaining portions are connected to and arranged between the two turning portions, and the two lateral retaining portions are respectively located at two opposite sides of the middle retaining portion.

Abstract: A linear guideway, a sliding module thereof, and a circulation seat thereof are provided. The circulation seat has an inherently one-piece structure, which includes two turning portions, a middle retaining portion, and two lateral retaining portions. The middle retaining portion has a two-stepped structure, which includes a connection bar and a limiting bar that is connected to the connection bar. The connection bar is connected to and arranged between the two turning portions, and a distance between two long lateral surfaces of the connection bar gradually increases along a direction away from the limiting bar. The two lateral retaining portions are connected to and arranged between the two turning portions, and the two lateral retaining portions are respectively located at two opposite sides of the middle retaining portion.

Abstract: A piezoelectric actuating device includes a carrier, at least a piezoelectric unit, at least a linked component and a moving component. The piezoelectric unit is disposed on the carrier and includes at least a piezoelectric buzzer. The linked component is disposed corresponding to the piezoelectric unit. One end of the linked component is attached to the piezoelectric buzzer. The moving component is connected with the linked component. When the piezoelectric buzzer is actuated, it can carry the linked component to move correspondingly so as to move the moving component. The piezoelectric actuating device has the advantage of low cost and can achieve the sub-nanometer scale actuating resolution.

Abstract: A linear actuator includes a housing, a rotary unit disposed in the housing, and a screw member driven by the rotary unit. The rotary unit is translatable relative to the housing when the screw member is driven by the rotary unit.

Abstract: A linear actuator includes a housing, a rotary unit disposed in the housing, and a screw member driven by the rotary unit. The rotary unit is translatable relative to the housing when the screw member is driven by the rotary unit.

Abstract: A three rod bundle confined inside a sleeve is constructed as a light guiding fiber mechanical splicing device which is stiff, strong and precise, with no moving parts. The design also applies to splicing fibers to pre-polished optical connectors through a built-in model of this innovative mechanical splicer. Applying the Soddy circles formula and using a bin approach assists in deriving the exact rod sizes needed and sleeve bore size to accommodate the three-rod bundle, so that this apparatus can be properly designed to guide any size of light guide fibers and studs with minimum clearance. Rods of varying diameters are sorted into bins and chosen based upon the aperture desired, thus eliminating the need for tight tolerance of the diameters of the three rods. This unique design allows for construction of a precision virtual hole of very long depth, which enables two optical fiber studs to butt against each other with a core to core misalignment of less than 1 um for single mode fiber optics cables.

Abstract: A three rod bundle confined inside a sleeve is constructed as a light guiding fiber mechanical splicing device which is stiff, strong and precise, with no moving parts. The design also applies to splicing fibers to pre-polished optical connectors through a built-in model of this innovative mechanical splicer. Applying the Soddy circles formula and using a bin approach assists in deriving the exact rod sizes needed and sleeve bore size to accommodate the three-rod bundle, so that this apparatus can be properly designed to guide any size of light guide fibers and studs with minimum clearance. Rods of varying diameters are sorted into bins and chosen based upon the aperture desired, thus eliminating the need for tight tolerance of the diameters of the three rods. This unique design allows for construction of a precision virtual hole of very long depth, which enables two optical fiber studs to butt against each other with a core to core misalignment of less than 1 um for single mode fiber optics cables.

Abstract: The present invention provides unamount head/arm subassemblies and read-write head stack assembly for a disk drive, and a servowriter having the head stack assembly. Each head/arm subassembly is assembled and aligned individually so that multiple head/arm subassemblies can be installed on a mounting block to build the head stack assembly with all heads being properly aligned. In addition, each head/arm subassembly can be disassembled independently, facilitating easy rework on individual defect head.

Abstract: The present invention provides a hub/clamp assembly for holding a disk hub in position when the hub is spin in a high speed. The hub/clamp assembly comprises of: a removable disk hub having a shaft for stacking a plurality of storage disks, a flange portion integrally attached to one end of the shaft, and an extension shaft integrally attached to the flange portion opposite to the shaft; wherein the axes of the shaft, the flange portion, and the extension shaft are in alignment; and a hub clamp housing having a housing with side walls and top and bottom surfaces, and a clamp means disposed within the cavity formed within the housing. The present invention also provides a multi-disk servowriter for writing servo information onto multiple storage disks at the same time.

Abstract: The present invention provides unamount head/arm subassemblies and read-write head stack assembly for a disk drive, and a servowriter having the head stack assembly. Each head/arm subassembly is assembled and aligned individually so that multiple head/arm subassemblies can be installed on a mounting block to build the head stack assembly with all heads being properly aligned.

Abstract: The present invention provides a hub/clamp assembly for holding a disk hub in position when the hub is spin in a high speed. The hub/clamp assembly comprises of: a removable disk hub having a shaft for stacking a plurality of storage disks, a flange portion integrally attached to one end of the shaft, and an extension shaft integrally attached to the flange portion opposite to the shaft; wherein the axes of the shaft, the flange portion, and the extension shaft are in alignment; and a hub clamp housing having a housing with side walls and top and bottom surfaces, and a clamp means disposed within the cavity formed within the housing. The present invention also provides a multi-disk servowriter for writing servo information onto multiple storage disks at the same time.

Abstract: This invention pertains to methods and apparatus for polishing and planarization of workpieces, such as fiber optics connectors, metallographic samples, semiconductor wafers, microelectronic substrate, optical devices and the like. The polishing pattern is a hypotrochoid generated by a spur gear rotating inside of an internal gear. The hypotrochoid is a superior polishing pattern because it not only provides a pattern similar to a figure eight pattern for producing optimal polishing conditions, but it also appears to precess around the center of the polishing space and maximize the utilization of the polishing pad or film.

Abstract: This invention pertains to methods and apparatus for polishing and planarization of workpieces, such as fiber optics connectors, metallographic samples, semiconductor wafers, microelectronic substrate, optical devices and the like. The polishing pattern is a hypotrochoid generated by a spur gear rotating inside of an internal gear. The hypotrochoid is a superior polishing pattern because it not only provides a pattern similar to a figure eight pattern for producing optimal polishing conditions, but it also appears to precess around the center of the polishing space and maximize the utilization of the polishing pad or film.

Abstract: A method and apparatus for determining arterial blood pressures using a photoplethysmograph is provided. In the inventive method the photoplethysmograph output is calibrated to the patient using an auxiliary blood pressure determining instrument, a constant k particular to the patient's arterial blood pressure-volume relationship is determined and is stored for later use; at the time of measurement information is obtained from the photoplethysmograph output; and a computer determines the patient's systolic and diastolic blood pressures.