摘要:
A photonic integrated device having a substrate layer, epitaxial layers formed on said substrate layer and a guiding layer formed by one of the epitaxial layers. An optical waveguide is formed within the guiding layer. In the waveguide are a splitter (4) having at least two outputs, each output being transmitted to a Mach-Zehnder modulator (6, 8), the phase of the output of at least one modulator being shiftable, the signals being recombined to provide an optical phase shift key (PSK) output (14) wherein a trench is etched into the substrate layer between each pair of modulators to isolate the modulators from one another.
摘要:
A flexible tape having a desired metal foil circuit pattern and a process for manufacturing such a tape. The starting tape comprises a non-metallic flexible substrate having a metal foil layer adhered thereto. The foil layer is patterned to form a desired circuit pattern and a pattern comprising bussing means. The foil is electroplated by connection of the electroplating circuitry to the bussing means. Thereafter, the tape is reduced in width by removing the bussing means and the underlying flexible substrate.
摘要:
A metallic tank having an insulated interior is disclosed which exhibits unique features to enable the welding of the tank sections together without damage to the insulation. The insulating lining is installed in the multi-piece metallic tank prior to the welding of the tank sections together. A heat shield is provided between the weld area and the insulating liner to prevent damage to the nonmetallic liner during the welding process. The method of assembly allows the economical and rapid fabrication of lined metallic tanks without fear of damaging the lining material. Also, an indirect fired water heater which has a tube heat exchanger in the lined metal tank with the heat shield. The inlet and exit lines of the heat exchanger pass through a bottom plate of the tank. The tank, in such case, contains potable water which is heated by contact with the heat exchanger located within the vessel. Hot boiler water passes through the heat exchanger to heat the water in the vessel. Fittings installed through the top and/or bottom portion of the vessel wall facilitate the drawing off of the heated water and the filling of the vessel with cold water.
摘要:
A metallic tank having an insulated interior is disclosed which exhibits unique features to enable the welding of the tank sections together without damage to the insulation. The insulating lining is installed in the multi-piece metallic tank prior to the welding of the tank sections together. A heat shield is provided between the weld area and the insulating liner to prevent damage to the liner during the welding process. The method of assembly allows the economical and rapid fabrication of lined metallic tanks without fear of damaging the lining material.
摘要:
A non-refillable safety valve for a pressure container. The valve includes a housing, having a central bore, which provides communication between a port and the pressure container for charging and selective discharging the pressure container. The central bore has a lower portion that is narrower than the upper portion of the central bore. A hollow knob unit, having a central bore, is in threaded engagement with the outer wall of the housing. A core, having a central bore, is slidably mounted in the central bore of the housing. The upper end of the hollow knob unit is mounted on the core in a rotatable manner and in fixed longitudinal relationship with the core. A sealing member is slidably mounted in the lower end portion of the central bore of the core. The core contains end stop means for preventing movement of the sealing member below the lower end of the core. The sealing member engages the interface ledge formed by the lower upper portions of the central bore of the housing when the core is moved the maximum possible distance into the central bore of the core or when refill is attempted after discharge of the pressure container. The core contains at least one passageway located in the core outwards from the sealing member for communication between the central bore of the core and said upper portion of the central core, of the housing. An engagable stop means is positioned between the outer surface of the housing and the inner surface of the hollow knob unit in order to limit retrograde or outward movement of the core to a position whereby the sealing member still engages the interface ledge when refilling the pressure container. The engagable stop means engages after the pressure container has been filled and the sealing member, the core and the knob unit have been moved into sealing position.
摘要:
A identification tag covering device for deterring catching of a covered identification tag includes a pair of rings that is selectively mutually couplable. A hinge is coupled to and extends between the rings. The rings are selectively positionable in an open configuration so that the rings are configured to insert an identification tag. The rings also are selectively positionable in a closed configuration wherein the rings are coupled to the identification tag. Indicia that are positioned on the identification tag are visible. Each of a pair of extrusions is coupled to and extends from a respective ring proximate to the hinge. The extrusions are configured to deter insertion of the rings into a narrow space, such as a gap between boards of a deck. At least one cutout, which is positioned through the pair of rings, is configured to position a coupler that is coupled to the identification tag.
摘要:
An apparatus for the unloading of an open top railcar apparatus has a ramp with a top surface and a bottom surface, a leg member affixed to the ramp so as to support the bottom surface of the ramp a distance above an underlying surface, and a hanger affixed to one end of the ramp so as to be suitable for positioning into the open top of the rail car. The leg member has first arm affixed to the first side member, a second side member affixed to the second side member, and bar affixed to the arms and extending therebetween.
摘要:
Volume adjustment based on listener position is disclosed. A position of one or more speakers is identified, and a position of a listener is tracked. For each of the one or more speakers, a changing distance between that speaker and the listener is assessed. A volume of that speaker is automatically adjusted in real-time based on a current distance between that speaker and the listener.
摘要:
Embodiments of a multi-port memory device may include a plurality of ports and a plurality of memory banks some of which are native to each port and some of which are non-native to each port. The memory device may include a configuration register that stores configuration data indicative of the mapping of the memory banks to the ports. In response to the configuration data, for example, a steering logic may couple each of the ports either to one or all of the native memory banks or to one or all of the non-native memory banks.
摘要:
Methods of accessing memory cells, methods of distributing memory requests, systems, and memory controllers are described. In one such method, where memory cells are divided into at least a first region of memory cells and a second region of memory cells, memory cells in the first region are accessed according to a first address definition and memory cells in the second region are accessed according to a second address definition that is different from the first address definition. Additional embodiments are described.