Abstract: An illumination device comprises a solid-state lighting device and a heat sink. The heat sink is configured to be attachable to a fixture for a gas-discharge lamp to retrofit existing gas-discharge fixtures. The heat sink is conductively thermally coupled to the solid-state lighting device to dissipate heat generated by the solid-state lighting device.

Abstract: Apparatus and methods to regulate an input power applied to a plurality of light emitters are provided. A regulator device includes a plurality of switches and a control circuit that controls the plurality of switches. The plurality of switches selectively couple respective strings of the light emitters in series to the input power to emit light when deactivated. The control circuit may deactivate a number of the switches to couple the respective light emitters to the input power in response to a sensed operational parameter of the input power. The control circuit may adjust the number of the switches deactivated in response to a change in the sensed operational parameter of the input power. A number of the light emitters may be coupled to the input power regardless of the sensed operational parameter of the input power.

Abstract: An apparatus for heat dissipation for a luminaire comprises an active heat transfer device and a thermally-conductive housing. The active heat transfer device causes turbulence in an ambient fluid. The thermally-conductive housing includes a cavity and a first end. The cavity is structured for an electronic ballast of the luminaire to be housed therein and thermally attached to an interior surface of the housing to allow the housing to absorb at least a portion of heat generated by the electronic ballast. The first end is structured for the active heat transfer device to be mountable to the first end of the housing. The housing further includes at least one thermally-conductive protrusion extending from an exterior surface of the housing and exposed to the turbulence in the ambient fluid to transfer at least a portion of the heat absorbed by the housing to the ambient fluid.

Abstract: An illumination device comprising a housing fixture, a light source, and an active heat transfer device is provided. The housing fixture includes a base adapted to be receivable in a light fixture receptacle configured to receive a gas-discharge lamp. The light source emits light with a color rendering index higher than a respective color rendering index of at least a type of gas-discharge lamp. The active heat transfer device is physically coupled to the light source and mounted to the housing fixture. The active heat transfer device receives power from a power supply to remove thermal energy from the light source.

Abstract: A luminaire to illuminate surfaces comprises a housing, a mounting fixture and a light source. The housing includes a base having a bottom surface positionable on a surface to be illuminated, an interior, and at least one window providing access between the interior and an exterior of the housing. The mounting fixture extends at least approximately perpendicularly downward with respect to the bottom surface of the base to secure the housing into a peripheral portion of the surface to be illuminated. The light source has a principal axis of emission that is directed outwardly through the window of the housing at a downwardly oriented angle with respect to the bottom surface of the base such that, when in use with the luminaire mounted to the surface to be illuminated, the principal axis of emission of the light source is directed at a portion of the surface to be illuminated.

Abstract: A ventilated seat assembly including a trim cover, an enclosed chamber, a spacer, and a cushion is disclosed. The enclosed chamber is formed by a top portion and an air-impermeable bottom portion and includes an opening for receiving air from an air mover. The top portion includes a plurality of holes configured to provide air movement through the chamber. The spacer is located within the chamber.

Abstract: A ventilated vehicle seat includes a bag formed from impermeable materials enclosing a spacer material. The latter preferably includes upper and lower netting sheets and fibers extending between the netting sheets, the fibers being sufficiently resilient to prevent total collapse of the spacer material when the seat is occupied. An air mover forces air into or draws air from the bag is coupled to the air space between the air impermeable layers. Holes are provided in the top of the bag, and the sizes are preferably selected to equalize air flow over the seating surface, rather than having all the air flow through the openings nearest the fan. An optional, porous heating layer may be located above the bag. The ventilation and trim components are preferably sewn into the seat in a single operation.

Abstract: A ventilated vehicle seat includes a bag formed from impermeable materials enclosing a spacer material. The latter preferably includes upper and lower netting sheets and fibers extending between the netting sheets, the fibers being sufficiently resilient to prevent total collapse of the spacer material when the seat is occupied. An air mover that forces air into or draws air from the bag may be coupled to the air space between the air impermeable layers of the bag. Groups of holes are provided in the top of the bag, and the total cross-sectional areas of the groups of holes are preferably selected to equalize air flow over the seating surface, rather than having all the air flow through the holes nearest the fan. An optional, porous heating layer may be located above the bag.

Abstract: A temperature control and process for adjusting the temperature of a workstation and a work medium at a workstation to a predetermined temperature. The temperature control comprises a cooling vehicle such as a heat exchanger, a coolant temperature sensor and control, a source of fluid coolant such as a manifold, a recirculating pump, a flow line to circulate the coolant to the workstation with the flow line containing a flow regulator and a heater, a bypass valve for bypassing the flow regulator and heater, and a workstation temperature sensor and control. The workstation temperature control controls the operation of the heater and bypass valve so that the temperature of the coolant is below the desired temperature for the workstation, thus achieving a rapid transient response while avoiding overcooling. The coolant temperature control and workstation temperature control may be in a temperature control computer, thus providing a large number of different operating sequences.

Abstract: A ventilated vehicle seat includes a bag formed from impermeable materials enclosing a spacer material. The latter preferably includes upper and lower netting sheets and fibers extending between the netting sheets, the fibers being sufficiently resilient to prevent total collapse of the spacer material when the seat is occupied. An air mover that forces air into or draws air from the bag may be coupled to the air space between the air impermeable layers of the bag. Groups of holes are provided in the top of the bag, and the total cross-sectional areas of the groups of holes are preferably selected to equalize air flow over the seating surface, rather than having all the air flow through the holes nearest the fan. An optional, porous heating layer may be located above the bag.

Abstract: A ventilated vehicle seat includes a bag formed from impermeable materials enclosing a spacer material. The latter preferably includes upper and lower netting sheets and fibers extending between the netting sheets, the fibers being sufficiently resilient to prevent total collapse of the spacer material when the seat is occupied. An air mover forces air into or draws air from the bag is coupled to the air space between the air impermeable layers. Holes are provided in the top of the bag, and the sizes are preferably selected to equalize air flow over the seating surface, rather than having all the air flow through the openings nearest the fan. An optional, porous heating layer may be located above the bag. The ventilation and trim components are preferably sewn into the seat in a single operation.

Abstract: A temperature control and process for adjusting the temperature of a workstation and a work medium at a workstation to a predetermined temperature. The temperature control comprises a cooling vehicle such as a heat exchanger, a coolant temperature sensor and control, a source of fluid coolant such as a manifold, a recirculating pump, a flow line to circulate the coolant to the workstation with the flow line containing a flow regulator and a heater, a bypass valve for bypassing the flow regulator and heater, and a workstation temperature sensor and control. The workstation temperature control controls the operation of the heater and bypass valve so that the temperature of the coolant is below the desired temperature for the workstation, thus achieving a rapid transient response while avoiding overcooling. The coolant temperature control and workstation temperature control may be in a temperature control computer, thus providing a large number of different operating sequences.

Abstract: A temperature control and process for adjusting the temperature of a workstation and a work medium at a workstation to a predetermined temperature. The temperature control comprises a cooling vehicle such as a heat exchanger, a coolant temperature sensor and control, a source of fluid coolant such as a manifold, a recirculating pump, a flow line to circulate the coolant to the workstation with the flow line containing a flow regulator and a heater, a bypass valve for bypassing the flow regulator and heater, and a workstation temperature sensor and control. The workstation temperature control controls the operation of the heater and bypass valve so that the temperature of the coolant is below the desired temperature for the workstation, thus achieving a rapid transient response while avoiding overcooling. The coolant temperature control and workstation temperature control may be in a temperature control computer, thus providing a large number of different operating sequences.

Abstract: A temperature control and process for adjusting the temperature of a workstation and a work medium at a workstation to a predetermined temperature. The temperature control comprises a cooling vehicle such as a heat exchanger, a coolant temperature sensor and control, a source of fluid coolant such as a manifold, a recirculating pump, a flow line to circulate the coolant to the workstation with the flow line containing a flow regulator and a heater, a bypass valve for bypassing the flow regulator and heater, and a workstation temperature sensor and control. The workstation temperature control controls the operation of the heater and bypass valve so that the temperature of the coolant is below the desired temperature for the workstation, thus achieving a rapid transient response while avoiding overcooling. The coolant temperature control and workstation temperature control may be in a temperature control computer, thus providing a large number of different operating sequences.

Abstract: A system for adjusting the density or contrast of a photographic print includes a projection lens system (18) for projecting an image from a negative (10) onto photosensitive paper (20). A matrix array (24) of liquid crystal display elements is interposed in the optical path in front of the print paper (20) and transmissivity of the individual LCD elements is controlled to provide an LCD mask to control the intensity and/or color of the light falling upon the print paper (20). Preferably, a television camera (16) is used with a beam splitter (14) to provide a real-time image of either the LCD mask (24) or the combined image of the mask (24) and negative (10) to allow adjustments in the mask (24) to be viewed as they are made. In printing black and white photos on multicontrast paper, the color transmissivity of the LCD elements is adjusted on an element-by-element basis to provide a localized adjustment of the contrast range of the print paper.

Abstract: A machine for extruding and cutting yeast raised dough for making solid donuts or bismarcks is described herein which employs a discharge tube angled from the horizontal and changes within the discharge tube and to the discharge tube outlet in order to create a circular donut or other desired shape.

Abstract: Improved means for substantially eliminating condensate subcooling in single-stage moisture separator reheaters is provided by recirculating large quantities of scavenging steam through the reheater tube bundle. Heating steam for the tubeside (within the tubes of the tube bundle) of the reheater is extracted from the main steam supply upstream of the high-pressure turbine. This main steam is throttled before entering the tube bundle at part load conditions to reduce the temperature differential with respect to the high-pressure turbine exhaust steam which is to be reheated on the shellside. The tubes of the tube bundle are differentially orificed at their inlet to provide sufficient steam to each tube based on complete condensation at tube exit. At throttled, part load conditions, considerable excess scavenging steam is required to correct for the inefficiencies of the fixed orifices at these off-design conditions.

Abstract: A Moisture Separator Reheater (MSR) has a plurality of tube bundles which receive high-pressure saturated (tubeside) steam therein. Steam to be reheated (shellside steam) is passed in heat-exchange relationship with the tubes of the first and second reheater tube bundles after first being dried by the panels of a moisture separator. It emerges from the shell of the reheater dried and heated. In the reheater tube bundles saturated steam at temperatures and pressures substantially higher than the shellside steam transfers heat to the shellside steam by condensation within the tubes. The steam in the second stage tube bundle is at a temperature and pressure that is substantially higher than that of the steam in the first stage tube bundle and is heating shellside steam at a higher temperature than the shellside inlet steam to the first stage tube bundle. A greater quantity of tubeside steam than is theoretically necessary is passed through the tube bundles.