Abstract: Computer systems and methods of operating a computer system are described. The computer system can include a computer rack; a first stack and a second stack provided in the computer rack, each stack comprising one or more computers; a first cooling plenum configured such that cooling air can flow between the computers in the first stack and the first cooling plenum; and a second cooling plenum configured such that cooling air can flow between the computers in the second stack and the second cooling plenum.

Abstract: In an aircraft galley, a power network distributes power from a source to electrical consuming devices (oven, water boiler, coffee machine, trash compactor, etc.). A control unit is connected to and can individually address each of the devices via a databus. The control unit compares the actual existing power consumption to a prescribed maximum value. If the actual consumption reaches the maximum value, the control unit calls up a power reduction procedure from a catalog in a database, and provides corresponding control signals to one or more of the devices to reduce the power consumption below the maximum value. The individual devices receive power in a time-sharing, power-sharing, or time-staggered manner. An intelligent distribution of available power resources avoids power overloads, and allows optimal utilization of all galley devices without limiting the normal catering process.

Abstract: The aim of the invention is to prevent an unwanted conduction of a flow of gas inside a channel that connects an inner space of an enclosed switchgear (1) to another space. To this end, the channel is closed by means of a closing mechanism according to an increase in pressure in the inner space.

Abstract: It is a problem of disclosed technology to provide a polymer optical waveguide substrate having a V-groove for fiber alignment providing optical coupling with an optical fiber with low loss.

Abstract: The invention includes a cable assembly housing. The cable assembly housing may include a main shell that defines a first cavity. The main shell may have a collar. The cable assembly may also include a cable shell that defines a second cavity. The cable shell may have a neck disposed between a mating surface and a flange. The flange of the cable shell may be disposed through the collar and inside the first cavity.

Abstract: An electrical connector having a housing, a plurality of conductive terminals supported within the housing, and a flange extending outward from the housing is disclosed. The flange has a single mounting notch therein that is formed during the manufacturing process to adapt the connector for use in a particular angular mounting position. A method of manufacturing such an electrical connector is also disclosed.

Abstract: A micro-mechanical device including a gimbaled micro-mirror position able by a one or more thermal actuators. The thermal actuators are not attached to the micro-mirror. Rather, the micro-mirror is retained to the substrate by one or more gimbals. The micrometer sized thermal actuators are capable of repeatable and rapid moving the micro-mirror out-of-plane to accurately and repeatably steer a beam of light.

Abstract: An apparatus for a power and/or data I/O port, comprised of a connector assembly (400 in FIG. 21A) which has male plug (433) with conductors (437, 435, 439, and 441), insulators (443, 438), and a female receptacle (414) with conductors (417, 419, and 421), and related elements (423) that create different electrical paths than had previously been present in electrical and electronic host devices. These newly-created electrical paths enable host devices and peripherals—such as a battery pack (450) and its battery power source (413), as well as one or more external power sources—to perform power and/or data functions in ways they could not without such an apparatus. By locating a connector assembly (400) in replaceable modules, such as a battery pack (450), users can upgrade and enhance the functionality of a multiplicity of existing (and future) electronic and electrical goods.

Abstract: An optical waveguide and an optical waveguide circuit having polarization insensitivity or a required low-level polarization dependence without degradation of the optical characteristics and reliability are disclosed, and a fabricating method of an optical waveguide and an optical waveguide circuit having polarization insensitivity or a required low-level polarization dependence without increasing the fabricating burden and the cost are disclosed. The optical waveguide comprises a planar substrate; a lower cladding which is provided on the planar substrate, where the lower cladding has a ridge; a core, provided on the ridge of the lower cladding, for transmitting light; and an upper cladding provided in a manner such that the core is covered with the upper cladding. The ridge has a shape predetermined so as to decrease polarization dependence of the optical waveguide to a required low level.

Abstract: An explosion-proof instrument quick disconnect and seal is provided for use in hazardous (e.g., explosive) environments to quickly connect or disconnect energized or de-energized electrical circuits. The quick disconnect and seal includes mating electrical receptacle inserts positioned within a male and a female portion. The male and female portions are connected to one another by a coupling nut having threads that engage mating threads on the male portion, thereby moving the male portion relative the female portion by rotation of the coupling nut, while at the same time preventing the electrical connection of the mating receptacle inserts in the male and female portions before the explosion-proof chamber is secure.

Abstract: A slip plate assembly (40) for supplying electrical current under rotational and translational force applications, includes a housing (39) and at least one draw unit (70). While subjected to rotational and translational forces, each draw unit (70) disposed within the housing (39) supplies electric current from a power source (not shown) to a receiving system (90). Each draw unit (70) includes a first electroplate (71), a second electroplate (72), and a plurality of rolling members (76) positioned within a gap (85) formed between the first and second electroplates (71, 72). In traversing this gap (85), each rolling member of the plurality of rolling members (76) contacts the first and second electroplates (71, 72) to create an electrical circuit path therebetween. Each draw unit (70) further includes a support spacer (78) and a resilient element (77).

Abstract: An arrangement for monitoring the integrity of the spare fibers within a fiber optic cable includes a transmitter unit at a first location and a receiver unit at a second location (which may be upwards of 50 miles from the first location). A test signal is launched by a laser source in the transmitter unit along each spare fiber, and a set of threshold detectors is used at the receiver unit to monitor the received signal level. If the level of a received test signal along a spare fiber drops below a predetermined level (or if the fiber fails completely), an alarm signal is generated to alert a technician regarding the need to repair or replace the failed spare fiber. The alarm signal may be a “local” alarm signal generated at the second/receiver location or may be communicated back to the first/transmitter location as a “remote” alarm signal.

Abstract: A vibration actuator includes a vibration element, which simultaneously generates a radial symmetric expansion vibration mode in which it expands and contracts in the radial direction and a non-axisymmetric planar vibration mode in which it bends to and fro in a non-axisymmetric manner within a single plane, and thereby drives a relative movement member, and a base member to which the vibration element is fixed. The vibration element includes at least one superimposed layer structure comprising a pair of electrical energy to mechanical energy conversion elements and an elastic member sandwiched between the pair of electrical energy to mechanical energy conversion elements. The elastic member includes a ring shaped portion to both the sides of which the pair of electrical energy to mechanical energy conversion elements are stuck, and a cylindrical shaped support portion, formed integrally with the ring shaped portion, which fixes the vibration element to the base member.

Abstract: The present invention allows easy mounting of the lower daughter board or card in a card edge connector assembly in which two cards are stacked. The sub-assembly (19) is attached via an upper or second pair of latch members (8) to the supporting shafts (22) that protrude from both ends of the housing (6) which is long in the lateral direction. Projecting or supporting parts (82) are caused to protrude outward from both ends of the rear part of the housing (6), so that the sub-assembly (19) is maintained in an open state. The lower or first daughter board (96) is inserted at an inclination into the lower accommodating recess (4) as shown in FIG. 6(A), and is pressed downward as indicated by the arrow (C), so that the first daughter board (96) is attached to the lower or first pair of latch members (10).

Abstract: A ferrule has a body, peripherally dimensioned for receipt within a commercially available fiber optic connector, the body has a forward portion comprising a front side and a rear side, the front side defining a face of the ferrule, the rear side defining an inner surface. The forward portion has a large format array of fiber holes, each of the fiber holes in the array extending between the front side and the rear side and being sized to accept an optical fiber inserted therein, and the forward portion having a thickness, T, less than 3000 microns but at least a minimum thickness sufficient to support optical fibers inserted into the fiber holes. An optical connector, having a ferrule, and a fiber optic cable assembly are also described.

Abstract: An inter-layer structure between a power layer and a ground layer of a printed circuit board includes an insulative magnetic structure with at least two layers of insulative magnetic substances with different complex magnetic permeability frequency characteristics.

Abstract: A sealed airtight container wherein the width of the exposed electrode part provided in a ceramic terminal part is enlarged, and the exposed electrode part is connected to a wiring part and the width of the wiring part is equal to the enlarged width of the electrode part. A sealed airtight container for an optical-semiconductor with a small heat generation in the metallized wiring layer, small power consumption and large current carrying capacity, and an optical-semiconductor module with a stable optical output can be obtained.

Abstract: The invention relates to a high frequency board-to-board connector for interconnecting electronic sub-assemblies. The high frequency board-to-board connector includes a row of conductive pins received in an insulative housing for connecting with receptacles of a design. Two discrete electronic sub-assemblies, for example PCBs, can be mechanically and electrically connected without the need for a gender male connector on one PCB and a corresponding gender female connector on the other PCB. A plurality of follower arms spaced apart along the grounding plate facilitates contact with a ground plane in the design to form a ground path. The ground path reduces electromagnetic coupling between any pair of conductive pins and consequentially lowering cross-talk noise. Furthermore, inductive parasitics of the conductive pins is reduced, further facilitating high frequency operations.

Abstract: To obtain connector connecting structure that makes it easy to connect connectors when a mounted part is mounted in a part-receiving part. In a keyboard unit mounted in a PC body of a notebook PC, a connector implemented on a flexible cable is movably supported through a cushion, which is made of urethane rubber and is fixed on a installation side 14B of the keyboard unit, and a support plate fixed to the cushion. Owing to this, by just mounting the keyboard unit in the PC body, the connector is connected to the connector in the PC body side, and hence connection becomes simple. Therefore, even if the misalignment between the connectors and arises, the connector moves according to an amount of the misalignment, and hence adequate connection can be performed.

Abstract: Terminal tools 16 are fixed to end portions of a plurality of wires 12 that are covered with a shield lacing 10, and a shield case 30 is connected/fixed to the shield lacing 10. End portions of respective wires 12 are inserted into a unit housing 40 of the electronic unit from the outside and connected to circuits in the unit housing 40, and then connected portions between respective wires 12 and a unit housing 40 are covered with the shield case 30 from the outside by fixing the shield case 30 to an outer surface of the unit housing 40. Also, the shield case 30 and the shield lacing 10 are brought into the state that they can be grounded via the unit housing 40.