Abstract: A mounting apparatus for a fan (10) includes a cabinet (30) for receiving the fan (10) and a bracket (50) for receiving the cabinet (30). The cabinet (30) includes a side wall (32) having an elastic member (36), and a securing portion (37) is formed on the elastic member (36). The bracket (50) defines an opening (531) for the securing portion (37) of the elastic member (36) engaging therein. Wherein when the elastic member is deflected inwardly, the securing portion of the elastic member disengage from the opening of the bracket. The cabinet with the fan can be easily removed from the bracket.

Abstract: A computer enclosure includes a cage (40), a bezel (60), and two pivot devices (80). The cage has a front panel (43) defining two holes (422). Each pivot device (80) is fixed to the bezel, and includes a cylinder (13), a spring (20) and a pivot (30). The cylinder receives the spring therein. Two L-shaped apertures (131) are defined in opposite sides of the cylinder. Each pivot includes a central pin (31), and a circumferential wall (32) surrounding most of the pin. Two resilient L-shaped hooks (324) are formed at opposite sides of the circumferential wall. The spring is compressed between a top end of the cylinder and the circumferential wall. When the hooks are slid from horizontal portions (132) of the apertures to vertical portions (133) of the apertures, the spring pushes the pivot downwardly, and the pin is pivotably engaged in a corresponding hole of the front panel.

Abstract: A locking device, for locking a heat sink (30) to a socket (10) on which an electronic component (20) is mounted, includes a pair of clips (60) each having a handle (62) and a ring (66). The handle includes a pair of first tabs (68) at one end thereof. A pivot (64) is connected between the first tabs and received in a slot (40) defined in an outmost fin of the heat sink. The handle further includes a pair of second tabs (72). The ring includes an opening end and a closed end for engaging with the socket. The opening end includes a pair of pivot portions extending through the second tabs. The handles are pivotable about the corresponding outmost fins between first positions at which the closed end of the rings are engaged with the socket and second positions at which the closed end are disengaged from the socket.

Abstract: Amounting apparatus used to fasten a PCB (10) with through holes (12) includes a supporting board (20) and a plurality of clips (30) mounted on the PCB. The supporting board has a plurality of standoffs (22) corresponding to the through holes of the PCB. Each of the clips includes a resilient portion (34) and defines a mounting opening (35) for having the standoffs sliding therein. When the standoffs press on the resilient portions of the clips, the PCB is clamped on the supporting board.

Abstract: A storage device mounting apparatus includes a first slider (20) having a catch (26), a second slider (30) having a cutout (35), a bracket (40) and a fastener (50). The bracket defines an opening (42) in a front plate (41) thereof. The bracket forms a guideway (45) having an aperture (47), a rail (46) and a stop (49) from a bottom plate (44) thereof corresponding to the opening. In assembly, the sliders are attached to opposite sides of a storage device (10). The storage device is inserted into the bracket through the opening, the first slider sliding along the guideway and the second slider sliding the rail. The catch of the first slider engages in the aperture of the guideway, the cutout of the second slider engagingly receives the stop, and the fastener secures the first slider to the guideway.

Abstract: A system for reducing the influence of polarization mode dispersion (PMD) in high speed fiber optical transmission channels. A signal is forward error correction (FEC) encoded according to an FEC code that defines a specified error tolerance per codeword. The invention then effectively randomizes the input polarization of the signal before transmission, in order to reduce the likelihood that PMD will distort one or more codewords beyond the allowed error tolerance. The invention will thereby increase the PMD-limited transmission distance in an optical transmission system.

Abstract: A PCB mounting apparatus includes a supporting plate (20) defining a number of through holes, a number of standoffs (50) engaging in the through holes, and a number of grounding members (60) attached to the standoffs. The standoff each includes a head (52) having a holding portion, a flange (54), a post (56), and a base (58). The grounding member each includes a first ring (62) supported on the flange, a second ring (68) supported on the base, and a band (66) connecting therebetween. The PCB (80) defines a number of fixing apertures (82). The combined standoff and grounding member is disposed in the through hole. The PCB is placed upon the supporting plate with the fixing apertures engaging the holding portions of the standoffs and contacts the first rings of the grounding members. The standoffs and the grounding members are made of conductive materials.

Abstract: An optical fiber protection switch comprises an optical interface and an optical switching system. The optical interface exchanges optical signals with optical fibers that are deployed in a ring configuration. The optical switching system exchanges the optical signals with the optical interface. The optical switching system performs ring switching of the optical signals in the optical domain in response to a first fault. The optical switching system performs span switching of the optical signals in the optical domain in response to a second fault.

Abstract: A mounting bracket (10) for holding a disk drive (30) includes a bottom wall (12), a first sidewall (14) extending upwardly from one side of the bottom wall with two locating pins (16) protruding inwardly therefrom corresponding to two fixing holes defined in a sidewall of the disk drive, a second sidewall extending upwardly from an opposite side of said bottom wall for sandwiching the disk drive with the first sidewall, and locking means for engaging with a second sidewall of the disk drive to retain the disk drive in the mounting bracket. In assembly, the disk drive is placed in the mounting bracket, and the locating pines are inserted into the fixing holes of the disk drive. With the other sidewall of the disk drive secured to the fixing structures of the mounting bracket, the disk drive is secured in the mounting bracket.

Abstract: An optical fiber protection switch that performs automatic protection switching. The optical fiber protection switch performs span and ring switching at the optical layer, thereby negating the need for SONET ADMs to perform the switching at the SONET layer. The optical fiber protection switch includes span switches and ring switches arranged to provide span and ring switching, respectively. The span switches and ring switches are implemented using 2×2 optical switches, for a total of eight 2×2 optical switches in the optical fiber protection switch. The system described herein may utilize SONET terminals and/or ATM switches in a WDM environment to support capacity increases while providing the ring and span switching functionality. A network switching element providing transparent, self-healing optical 4-fiber BLSR (OBLSR/4) is realized by using the optical fiber protection switch described herein.

Abstract: A computer component mounting system includes two mounting frames (30) attached to two side panels (52) of a chassis (50) respectively, and a mounting bracket (10) having a main portion (12) for attaching computer components (100) such as fans (100) thereto, and two mounting portions (13) at opposite ends of the main portion. Each mounting frame includes a base plate (32) forming a positioning plate (322), and two side plates (36) each forming an oblique guide plate (362). A locking slot (364) is defined in each side plate and adjoining guide plate. Each mounting portion includes two locking tabs (140, 160) engaging in the locking slots of a corresponding mounting frame, and a positioning tab (15) joined to the positioning plate of the corresponding mounting frame to thereby secure the mounting bracket to the mounting frames. The fans are thus secured within the chassis.

Abstract: A storage device mounting apparatus includes a first slider (20) having a catch (26), a second slider (30) having a cutout (35), a bracket (40) and a fastener (50). The bracket defines an opening (42) in a front plate (41) thereof. The bracket forms a guideway (45) having an aperture (47), a rail (46) and a stop (49) from a bottom plate (44) thereof corresponding to the opening. In assembly, the sliders are attached to opposite sides of a storage device (10). The storage device is inserted into the bracket through the opening, the first slider sliding along the guideway and the second slider sliding the rail. The catch of the first slider engages in the aperture of the guideway, the cutout of the second slider engagingly receives the stop, and the fastener secures the first slider to the guideway.

Abstract: A fixing apparatus is for fixing a motherboard (60) in a chassis (20). The chassis includes a supporting board (30). The supporting plate includes a number of clips (36, 38), and a screw hole (391). The motherboard (60) defines a number of through holes (62) corresponding to a number of standoff (40) disposed on the supporting plate, a number of apertures (64), and a fixing hole (66). The through holes each include a circular hole (622), and a slot (624). The standoffs each comprise a head (42), a neck (44), and a base (46). The clips each include a shoulder (367, 387), and a catch (366, 386). The standoffs and the clips engage the through hole and the apertures of the supporting plate to attach the motherboard in the chassis. A stud extends through the fixing hole and engages the screw hole to secure the motherboard in the chassis.

Abstract: A locking device, for locking a heat sink (30) to a socket (10) on which an electronic component (20) is mounted, includes a pair of clips (60) each having a handle (62) and a ring (66). The handle includes a pair of first tabs (68) at one end thereof. A pivot (64) is connected between the first tabs and received in a slot (40) defined in an outmost fin of the heat sink. The handle further includes a pair of second tabs (72). The ring includes an opening end and a closed end for engaging with the socket. The opening end includes a pair of pivot portions extending through the second tabs. The handles are pivotable about the corresponding outmost fins between first positions at which the closed end of the rings are engaged with the socket and second positions at which the closed end are disengaged from the socket.

Abstract: A leadframe includes a die pad, a plurality of tie bars, a plurality of metal extrusions and a plurality of leads. The leads are arranged around the die pad. The tie bars are connected to the corners of the die pad, and the metal extrusions are connected to the sides of the die pad but separated from the tie bars. Each metal extrusion has a locking hole and a bonding surface, which is higher than the die pad. The metal extrusions are configured for improving ground connections by wire-bonding. When a bottom surface of the die pad is exposed from an encapsulant for a semiconductor package, the metal extrusions help to secure the die pad without stress transmission.

Abstract: A PCB mounting apparatus includes a supporting plate (20) defining a number of through holes, a number of standoffs (50) engaging in the through holes, and a number of grounding members (60) attached to the standoffs. The standoff each includes a head (52) having a holding portion, a flange (54), a post (56), and a base (58). The grounding member each includes a first ring (62) supported on the flange, a second ring (68) supported on the base, and a band (66) connecting therebetween. The PCB (80) defines a number of fixing apertures (82). The combined standoff and grounding member is disposed in the through hole. The PCB is placed upon the supporting plate with the fixing apertures engaging the holding portions of the standoffs and contacts the first rings of the grounding members. The standoffs and the grounding members are made of conductive materials.

Abstract: A retaining assembly includes a cabinet (70), a first rail assembly located in the cabinet, a pair of metal plates (30) attached on the first rail assembly, a server (60), a second rail assembly attached to two sides of the server, two fastening plates (50) attached to the two sides of the server and two thumbscrews (90). A plurality of threaded holes (72) is defined in two sidewalls of the cabinet. Two first protrusions (14) are provided in the first rail assembly. Each metal plate has two positioning holes (32) and a fixing hole (34). The first protrusions engagably extend through the positioning holes respectively. Each fastening plate has an inserting hole (56) corresponding to the fixing hole of the metal plate. The thumbscrews are inserted through corresponding inserting holes of the metal plates to engage in corresponding fixing holes of the metal plates.

Abstract: A mounting apparatus includes a support member (30), a pair of lock members (20) and a plurality of fasteners (40). The support member adapted for receiving a data storage device (10) thereon includes a main board (32) and a front board (34). A pair of hooks (322) is arranged on the main board. The front board defines an opening (342) for extension of the data storage device therethrough. The lock member for securing the data storage device to the support member includes a lateral plate (22) and a bottom plate (24). Each of lock members has a symmetrical configuration about a central transverse axis thereof. The bottom plate defines at least one locking slot (242) engagingly receiving a corresponding one of the hooks. The fasteners fixedly secure the bottom plates of the lock members to the support member.

Abstract: A retaining device (10) for retaining expansion cards (20) in a chassis (300) includes a riser card (40), a pair of ejectors (50) and a bracket (100). A motherboard (200) including a connector (210) is attached in the chassis, the connector includes a top wall (211). The ejectors are pivotally attached to the riser card. A pressing portion (55) and a locking portion (57) are formed on two ends of the ejectors respectively. A pair of restraining holes (122) is defined in the bracket. A locking hole (124) is defined beside the restraining hole. The ejectors extend through the restraining holes. The riser card is attached to the bracket and the expansion card is attached to the riser card. When assembly, the riser card is inserted into the connector, the locking portions engage with the locking holes. When the ejectors are rotated inwardly, the pressing portions press against the top wall of the connector and the riser card is lifted.

Abstract: A computer enclosure includes: a bottom casing (20); a top casing (10) defining an opening (12) and detachably attached to the bottom casing; and an engaging device (40) including an upper unit (50) mounted below the opening of the top casing, and a lower unit (60) mounted to the bottom casing. The upper unit includes a bracket (51), and first and second levers (54, 56) pivotably mounted in the bracket. The first lever has first and second ends (542, 544). The lower unit of the engaging device includes parallel driving plates (64) defining generally U-shaped cutouts (640). When the first end of the first lever is rotated downwardly or upwardly, the second end of the first lever slidingly drives against the driving plates at rear or front extremities respectively of the U-shaped cutouts, thereby respectively attaching or detaching the top casing to or from the bottom casing.