Abstract: A storage hanger includes a main body having a rear portion, a base portion, and a front portion. The rear portion has a proximal end and a distal end, At least one aperture is formed through the rear portion. The front portion has a proximal end and a free distal end. The base portion is coupled to the proximal end of the rear portion and the proximal end of the front portion. Each of the rear portion, the base portion, and the front portion share a common peripheral edge. The free distal end of the front portion further has at least one rounded section of the peripheral edge, which militates against damage to bulky items, such as a JEEP® door, placed on the storage hanger.

Abstract: The safety attachment provides preferably 4 video cameras mounted around a bandsaw blade and looking parallel to the blade direction. Each camera CCD sensor is partly scanned in mode 1. In mode 1 an axis corner of each scanned area is aligned with the camera axis, produced to the table, defining a corner of a parallel-sided protected volume including the entire exposed blade. The blade is rapidly braked when the attachment detects a glove intrusion. In the alternative fully scanned mode 2 the protected area extends outside the mode 1 area and a warning only is emitted on intrusion.

Abstract: The invention relates to a transport container (1) for helium (He), comprising an inner container (6) for receiving the helium (He), a coolant container (14) for receiving a cryogenic liquid (N2), an outer container (2) in which the inner container (6) and the coolant container (14) are received, and a thermal shield (21) which can be actively cooled with the aid of the cryogenic liquid (N2), the thermal shield (21) comprising a tubular base section (22) in which the inner container (6) is received, and a cover section (23, 24) that closes the base section (22) at the front and that is arranged between the inner container (6) and the coolant container (14), wherein an intermediate space (20) is provided between the inner container (6) and the coolant.

Abstract: The invention relates to a transport container (1) for helium (He), comprising an inner container (6) for receiving the liquid (He), an insulation element (26) that is provided on the exterior of the inner container (6), a coolant container (14) for receiving a cryogenic liquid (N2), an outer container (2) in which the inner container (6) and the coolant container (14) are received, and a thermal shield (21) which can be actively cooled with the aid of the cryogenic liquid (N2) and in which the inner container (6) is received, wherein a peripheral gap (31) is provided between the insulation element (26) and the thermal shield (21), and said insulation element (26) comprises a copper layer (27) that faces the thermal shield (21).

Abstract: A transport container for helium, having an inner container for receiving helium, a thermal shield actively coolable with the aid of a cryogenic liquid and in which the inner container is accommodated, an outer container in which the thermal shield and inner container are accommodated, and a carrying ring provided on the thermal shield. The inner container is suspended from the carrying ring with the aid of first suspension rods, wherein the carrying ring is suspended from the outer container with the aid of second suspension rods, wherein at least one of the first suspension rods has a first spring device and at least one of the second suspension devices has a second spring device in order to ensure a spring pretension of the first suspension rods and the second suspension rods for different heat expansions of the inner container and the thermal shield.

Abstract: A sensor mounting assembly is configured for use with a vessel arrangement including at least four vessels. The assembly includes first and second elongated frame members, first and second rollers, and first and second sensors. The first sensor is attached to the first elongated frame member and is configured to contact the surface of the first vessel upon actuation in a first direction. The second sensor is attached to the second elongated frame member and is configured to contact the surface of the second vessel upon actuation in a second direction that is substantially orthogonal to the first direction. This disclosure also describes a method of mounting at least six sensors for use with a vessel arrangement including at least four vessels, the vessel arrangement disposed in a container in a two-by-two stacked configuration having a central space.

Abstract: Hydrate remediation systems, apparatuses, and methods of making and using same including at least one pair of electrodes detachably or fixedly attached to a pipeline or flowline in a spaced relationship so that a current may be imposed across a section of the pipeline or flowline between each pair of electrodes resulting in electrical heating of the section for a time sufficient to raise a temperature of a fluid in the section of the pipeline or flowline to a temperature above a dissociation temperature of hydrates formed in the fluid.

Abstract: A method for separating two or more different gases that are being transported in a pipeline is described. A slug of inert gas, particularly nitrogen is introduced between the two or more different gases to replace the isolators that have been traditionally used. This slug of inert gas will assist in more efficiently transporting the gas while reducing the problems associated with isolators. There is further disclosed a method for separating and transporting at least two liquid products such as two different crudes or diesel and gasoline in a pipeline.

Abstract: The present invention relates to a substrate structure for LED lighting, the structure being capable of improving the hemispherical intensity distribution of a lighting device in which an LED is used, thereby improving the light efficiency of the lighting device. The substrate structure includes a first substrate for mounting a first LED thereon and three second substrates, each for mounting a second LED thereon. The second substrates are coupled to the first substrate such that the second substrates are perpendicular to the first substrate and are arranged at an angular interval which is within a range of 115° to 125° with respect to each other in a cross-sectional view taken parallel to the first substrate.

Abstract: Light engine modules comprise a support member and a solid state light emitter, in which (1) the emitter is mounted on the support member, (2) a region of the support member has a surface with a curved cross-section, (3) the emitter and a compensation circuit are mounted on the support member, (4) an electrical contact element extends to at least two surfaces of the support member, and/or (5) a substantial entirety of the module is located on one side of a plane and the emitter emits light into another side of the plane. Also, a module comprising means for supporting a light emitter and a light emitter. Also, a lighting device comprising a housing member and a light emitter mounted on a removable support member. Also, a lighting device comprising a module mounted in a lighting device element. Also, a method comprising mounting a module to a lighting device element.

Abstract: A light fixture and a method of making a light fixture include a light-permeable tube, at least one end cap pushed onto a free end of the tube for closure, and a driver device received at least partially in the tube and held in the tube by the end cap for driving a light module arranged in the tube. The end cap is fastened on the tube by an expanded adhesive and the driver device is fastened to the end cap or to the tube by the expanded adhesive.

Abstract: Embodiments of the present disclosure provide devices and systems including a material including a halide perovskite and/or phosphor to produce and/or communicate using visible light, and the like.

Abstract: A multi-function flashlight that includes a flashlight body, an optic having a focusing portion and a non-focusing portion, a main LED positioned to direct light through the focusing portion, and one or more additional LEDs positioned to direct light through the non-focusing portion. A power source may be disposed within the flashlight body adapted to provide power to the main and additional LEDs, and a first control may be included that is configured to selectively provide power to the primary LED.

Abstract: A recessed light fixture configured to deliver indirect light to an area. The recessed light fixture includes a trim component, a reflector coupled to the trim component, and an annular ring including a plurality of light-emitting diodes (LEDs). The trim component has an outer wall and an inner wall spaced radially inward of the outer wall, and defines an annular recess between the outer and inner walls. The reflector includes a patterned reflective surface. The annular ring is arranged within the annular recess of the trim component. The LEDs are configured to emit light toward the reflector so that the reflector redirects the light to deliver the indirect light to the area.

Abstract: A bracket 1 for attaching a light fitting to a ceiling or wall. The bracket 1 has a main body 2 to be directly applied to the ceiling or wall and to be flush with the ceiling or wall. The main body 2 has a central portion 3 with a central aperture 4 for the passage of the electrical cable 12 coming out from the ceiling or wall. The central aperture 4 being sized so that the electrical cable 12 can easily pass through it.

Abstract: An enclosed lighting unit for use with light strips is provided to enable installation of architectural lighting. The lighting unit has cooperating base and cover which are assembled by hand. The unit encloses a channel supporting the light strips which maintain a clearance distance between the light sources and the cover.

Abstract: A solar powered lighting system, and a method of controlling the system, the method including monitoring a voltage level of a solar panel in the solar powered lighting system, monitoring a voltage level of a battery in the solar powered lighting system, controlling the solar panel to charge the battery when the voltage level of the solar panel is above a predetermined charging threshold, controlling the battery to power one or more lights of the solar powered lighting system when the voltage level of the solar panel is below a predetermined charging threshold and the voltage level of the battery is above a predetermined operating threshold, and suspending powering of the one or more lights when the voltage level of the battery is below the predetermined operating threshold.

Abstract: An imitation flame device includes a base, a flame component, a swing support, a first magnet, and a ferromagnetic element. The swing support is configured in the base, the flame component is fixed on the swing support and protruded out of the base, one of the first magnet and the ferromagnetic element is installed in the base, another of the first magnet and the ferromagnetic element is fixed on the swing support, the first magnet and the ferromagnetic element are attracted each other to cause the swing support to suspend within the base, and the first magnet and the ferromagnetic element are in point contact. The device shows flaming effect of faux flame to achieve an excellent imitation effect and saves energy.

Abstract: An illuminated support stand having a housing with a base and at least one sidewall forming an interior volume. The illuminated support stand also has an upper planar surface with a transparent portion centrally disposed thereon. A light source is disposed beneath the transparent portion within the interior volume of the base. The upper planar surface is configured to support an object, such as a vase thereon with a plurality of light-emitting diodes (LEDs) configured to flash in sequence with an audio input. A plurality of control buttons is disposed on an outer front surface of the housing and is used to operate the illuminated support stand. A wireless transceiver is configured to connect to an external source. A skirt is disposed on a perimeter of the housing and is removably secured thereon.

Abstract: A vehicle lamp includes a projection lens, a first light source disposed behind the projection lens and configured to emit light forming a low-beam light distribution pattern which is a predetermined light distribution pattern, a reflector configured to reflect light emitted from the first light source toward a first rear focal point of the projection lens, and a second array light source disposed behind the projection lens and having a plurality of semiconductor light emitting elements arranged in at least one row. The second array light source is configured to emit light forming an additional light distribution pattern, and the center position or maximum light intensity position of the additional light distribution pattern overlaps with the low-beam light distribution pattern on a virtual vertical screen in front of the lamp.

Abstract: A vehicle lamp includes a projection lens and a plurality of light emitting elements arranged in parallel in a required direction behind the projection lens, and is configured to irradiate light emitted from each of the light emitting elements toward a front side through the projection lens. A plurality of diffusing lens elements that diffuse the light emitted from each of the light emitting elements in the required direction are provided on a front surface and/or a rear surface of the projection lens in a stripe shape to extend in a direction orthogonal to the required direction when viewed from the front side of the lamp.

Abstract: A vehicle headlamp includes an excitation light source; a light deflector configured to receive light from the excitation light source and two-dimensionally scan the light received from the excitation light source; and a projection lens that transmits the light scanned by the light deflector. The vehicle headlamp includes a first auxiliary lens that is arranged between the light deflector and the projection lens so as to transmit the light scanned by the light deflector toward the projection lens, and the first auxiliary lens has a negative force.

Abstract: An illumination device includes a light source, a micromirror array having micromirror actuators, switchable in each case between an on state and an off state, an optical unit, and an optical sensor unit. The light is guided onto the array and proportionally at a respective one of the actuators in an on tilt position is reflected to an illumination application, and in an off tilt position is reflected to the optical sensor unit. The device is configured such that a first actuator, which is in an on state in the on tilt position, is brought to the off tilt position for a first test interval, and a second actuator, which is in an off state in the off tilt position, remains in the off tilt position for the first test interval. A radiation power incident on the sensor unit during the first test interval is detected by the sensor unit.

Abstract: A light irradiation device (1) includes a light-source module (2), a light deflector (3), a parallel light generation unit (4), and a projecting light generation unit (5) in this order along the optical path. All of the light-collection point of the light-source module (2) on the emission side, the center mirror Or of the light deflector (3), and the focal point of the parallel light generation unit (4) on the incidence side are set at the same position P1. The mirror (31) of the light deflector (3) forward- and reverse-rotates about the axis passing through the mirror center Or to emit scanning light Ls as the reflected light and the deflected light to the parallel light generation unit (4). The parallel light generation unit (4) collimates the scanning light Ls to be parallel light that is parallel to the optical axis for emission.

Abstract: A lighting arrangement and a method of forming an illumination beam are described. A plurality of LED lighting elements is operable to emit light. A plurality of collimator elements is arranged to collimate light emitted from the LED lighting elements. A first projection element is arranged to project light emitted from the collimator elements onto a spatially controllable reflector element. The spatially controllable element comprises a plurality of reflector elements adjustable between a first and a second position. In the first position, the light is reflected into the direction of a second projection element to form a projected illumination beam. In the second position, light is reflected into a different direction to not contribute to the projected illumination beam.

Abstract: In described examples, a DMD includes micromirrors. A first light source generates a first beam profile illuminating a first set of micromirrors of the DMD. A second light source generates a second beam profile illuminating a second set of micromirrors of the DMD. The first and second beam profiles partially overlap on at least some micromirrors of the DMD. The first light source is source-modulated independently of the second light source for adjusting power and brightness in response to a sensed driving condition. The micromirrors of the DMD are modulated in response to the sensed driving condition.

Abstract: The light device for a vehicle comprises an optical module comprising a reflector (2), common for signal light functions, e.g. the daily running light or position light, and for the low beam/high beam lighting, a main light source (4) designed for the said low beam/high beam lighting, and a secondary light source (3) designed for the signal light functions. Between the secondary light source (3) and the reflector (2), a micro-lens (1) is situated, configured to increase the diffusion of light emitted by the secondary light source (3) before it falls onto the reflector (2).

Abstract: A light distribution module configured to control a light distribution of a light source is provided. The light distribution module includes a lens and an optical cover. The lens has a first light-incident surface, a first light-emitting surface opposite to the first light-incident surface, and an accommodating recess located at a side of the first light-incident surface, wherein the accommodating recess is configured to contain the light source. The optical cover covers the lens and has a second light-incident surface and a second light-emitting surface opposite to the second light-incident surface, wherein the second light-incident surface is located between the first light-emitting surface and the second light-emitting surface, and the second light-incident surface has a plurality of sub-curved surfaces. Boundaries between adjacent sub-curved surfaces are bent-shaped with respect to the adjacent sub-curved surfaces.

Abstract: A display device includes a display panel; a frame at a rear of the display panel, the frame including a bottom and a sidewall extending from the bottom; a substrate on the frame; a light source mounted on the substrate; a reflective lens mounted on the light source, wherein the lens includes an upper surface having a concave portion, a lower surface, and a side surface, and the upper surface of the reflective lens reflecting at least a first part of light emitted from the light source toward the sidewall of the frame through the side surface of the reflective lens; and a plurality of dots between the substrate and the reflective lens and configured to absorb at least a second part of light from the light source. Further, the plurality of dots are arranged around the light source and in an area within a boundary of the lower surface of the reflective lens.

Abstract: In one aspect, an optical lens assembly (herein referred to also as an optic) is provided that comprises a plurality of lenses (or lens segments) adapted to receive light from a light source, each of said lenses (or lens segments) having an input surface and an output surface and a lateral surface extending between the input and output surfaces. The lenses are arranged relative to one another and positioned relative to the light source such that each of the lenses receives at its input surface a different portion of light emitted by the source, e.g., each lens receives at its input surface light emitted by the source into an angular subtense (solid angle) different than an angular subtense associated with another lens. Each lens (or lens segment) guides at least a portion of the received light to its output surface via reflection, e.g., via total internal reflection (TIR).

Abstract: There are provided a light emitting unit using a wavelength conversion member which may be put to practical use, and a display and a lighting apparatus which include the light emitting unit. The light emitting unit includes: a light source; an optical part including a light incident surface, the light incident surface facing the light source; a wavelength conversion member provided between the light source and the light incident surface; and a holding member holding the wavelength conversion member at a position between the light source and the light incident surface of the optical part.

Abstract: An electroluminescent lighting system includes an electroluminescent encapsulated and protected inside a solid wall mounting channel. The mounting channel is typically plastic. The mounting channel may itself be printed on its outside display surface, or it may protect a printed surface inside its channel. The mounting channel is sealed on one end by a sealing cap and on its opposite end by an electrical connector that powers the EL lamp inside the channel. This sealed system offers a durable shield for the EL lamp that is mounted inside the channel.

Abstract: A durable LED light engine includes a printed circuit board including LEDs mounted thereon positioned between a top enclosure and a bottom enclosure. Once assembled together, the combination of the top enclosure, the printed circuit board and the bottom enclosure are held together with a molding material. The top enclosure includes one or more integrated lenses for directing the illumination of the LEDs. The LED light engine may be mounted to a surface using a fastener passing through the combination of the top enclosure, the printed circuit board, and the bottom enclosure in the assembled LED light engine.

Abstract: In accordance with certain embodiments, illumination elements having different shapes defined by contiguous arrangements of illumination unit cells may be assembled to illuminate an arbitrary two-dimensional area. In various embodiments, the illumination elements include flexible light sheets and one or more sealed regions containing light-emitting elements, the sealed regions defined by seals between a top housing and a bottom housing and/or the light sheet.

Abstract: Recessed luminaire components include a lathing ring that is installed in a ceiling using fold-over tabs that are coupled to the lathing ring. The recessed luminaire components further include a rimless housing can and a plurality of flange clips that are removably coupled to the rimless housing can. The rimless housing can and flange clip assembly is installed in the ceiling fitted with the lathing ring. The recessed luminaire components also include a snap fit lathing ring that is configured to be coupled a housing instead of being coupled to the ceiling for an alternative installation. The snap fit lathing ring may include one or more snap tabs that are configured to engage corresponding notches in the housing.

Abstract: A clip for mounting a linear LED lamp to an overhead dropped ceiling grid or to a planar support surface. The mounting clip has a pair of spaced resilient fingers extending downwardly and defining an interior region between the fingers sized to receive a portion of the linear LED lamp heat sink. Each finger has an internally facing engagement portion comprising protrusions configured to interlock with one or more external ridges of the heat sink of a linear LED lamp to securely retain the linear LED lamp between the fingers. In one form, the mounting clip has upper tab portions configured to engage and connect to a horizontally extending ledge of a channel member of the overhead dropped ceiling grid. In another form, the mounting clip is adapted to be secured to a planar support by means of a mechanical fastener or magnetically.

Abstract: Lighting fixture include an elongated support and at least one lighting element. The support operably attachable to a wall or a ceiling. The least one lighting element includes a lighting unit and a continuous surrounding member. The continuous surrounding member has an inner surface and an outer surface defining a first opening and a second opening. The elongated support extends through a first portion of the surrounding member spaced from the first opening and spaced from the second opening and extends through a second portion of the surrounding member spaced from the first opening and spaced from the second opening. The lighting unit is disposed in a cavity and spaced from the inner surface of the surrounding member to define a surrounding area between the lighting unit and the inner surface of the surrounding member.

Abstract: A folding light tower is provided that utilizes a 4-bar linkage mechanism which enables full vertical extension of the tower with the use of one actuator. The exemplary tower generally includes a base, a lower lift arm, and an upper lift arm. Spring elements are used near the rotating joints of the lower lift arm and upper lift arm of the tower. The spring elements act to preload the joints and help to remove play and movement when the tower is unfolded/during the vertical extension process.

Abstract: A system comprising track-mounted luminaires and track. In some embodiments, electrical power for illumination is accessed by a luminaire through electrified railing recessed within a relatively narrow slot of the track. In some embodiments, a mount is provided separately from and/or additional to the power slot; for example, a magnetic mount. Optionally luminaires are orientable to select a direction of illumination, while secured by the magnetic mount. The track is optionally mounted flush and/or recessed with a mounting surface such as a ceiling and/or wall. In some embodiments, a recessed surface of the track is formed with an arc. Optionally luminaires conform with the curvature of the arc. Additionally or alternatively, the track is at least partially masked and/or decorated, for example by plastering and/or a face plate.

Abstract: Disclosed is a lighting fixture (200) with a separately controllable set of LED-based light sources (102) configurable to create both downlighting and wall-washing lighting effects. To create the desired wall-washing effects, the intensity and angle of light sources in the lighting fixture are adjusted to individually illuminate different portions of the wall of surface. One set of LED-based light sources positioned along the edge of the ceiling tile is configured to emit a low intensity light beam toward the upper portion of the wall surface adjacent the ceiling. Another set of LED-based light sources emits a higher intensity light beam toward an intermediate portion of the wall surface. Another set of LED-based light sources emits an even higher intensity light beam toward the bottom portion of the wall surface.

Abstract: The present invention relates to a snow removing apparatus of an LED traffic signal light. More specifically, the present invention relates to a snow removing apparatus of an LED traffic signal light which detects snow accumulated on the lens of a traffic signal light and heats heating coils installed in the lens to remove snow. The present invention, to achieve this purpose, is equipped with an infra-red emitting unit; an infra-red receiving unit that is installed inside a lens and receives infra-red reflected from the infra-red emitting unit; a CDS sensor installed inside a lens and which measures visible light to compensate the emitting output of the infra-red emitting unit, and; a heater that is installed in the lens and which is supplied power to generate heat, and is characterized in that the lens has a gentle curvature, with ceramic-coated coil securing grooves formed on the inside of the lens along its inside surface, with heater coils installed by inserting in the coil securing grooves.

Abstract: A novelty display for use with a housing having a light source arranged so that light from the light source emanates through the top, the display including: a support member having: an anchoring end configured to affix to the rear face of the housing; a display end to be illuminated by the light source through the top; and a middle section extending between the anchoring end and the display end. The middle section extends from the anchoring end away from the rear face and back toward the display end above the top. A first portion of the middle section is obscured when viewing the display from the front, and a second portion of the middle section not obscured by the housing or the display end is configured to minimize its visibility in the dark, to provide the illusion of the display end levitating above the open top of the housing.

Abstract: A burn box includes a font, a rear, a first and a second side, a lower, and an upper interior surface, as well as a first push member, a first coupler, and a first torque member. The first push member includes a first end, a second end, and a first coupler portion. The first coupler pivotally couples the first coupler portion to the first interior surface. The second end is vertically intermediate the first end and the lower interior surface. The first torque member provides a first torque to the first push member. When the first torque is provided to the first push member, the first push member rotates about a first rotational axis. The first rotational axis is through the first coupler portion of the first push member. The first rotational axis is parallel to the longitudinal axis. The second end rotates toward the second side interior surface.

Abstract: A fuel swirler with anti-rotation features is provided. A swirler assembly may comprise a swirler, a guide plate, and a retaining ring. The swirler, the guide plate, and/or the retaining ring may comprise recessions configured to receive a retaining element. The retaining element may be configured to interface with the recessions to create an interference in the swirler assembly. The interference may at least partially resist rotation of the guide plate with respect to the swirler.

Abstract: An energy-saving gas burner head and a gas furnace thereof, and the gas burner head comprises a rotating vane wheel, and the rotating vane wheel comprises a burner head and a plurality of rotating blades extending from a bottom end of a side wall of the burner head to a top end of the side wall of the burner head, and the side wall of the burner head is further provided with a plurality of through-holes for a gas to flow through. The spiral rotating blades could enhance the air fluidity, thereby forming a diffused cyclone, which allows the gas to be fully combusted, and that the heat rises up causes surging ejection and strong firepower, so as to improve the combustion efficiency of the gas furnace, which could reduce waste of gas and carbon emission, and avoid air pollution.

Abstract: An electricity generation device comprising a thermoelectric generator and a container of compressed fluid, in which said thermoelectric generator comprises a hot surface and a cold surface, in which said container comprises an exterior surface and an aperture, in which said device comprises a release valve for opening said aperture to release said compressed fluid, in which expansion of said compressed fluid cools said exterior surface, and in which a heat sink extends from said cold surface to at least part of said exterior surface.

Abstract: Provided herein are flashback arrestors disposed proximate the head of a cutting torch for restricting flashback into the torch head. In one approach, a torch assembly is provided including a torch head having a gas passageway formed within a body of the torch head, and a tip coupled to a distal end of the torch head. In some approaches, the tip has a proximal end and a distal end, the distal end of the tip including an exit orifice and the proximal end of the tip having a set of openings in fluid communication with the gas passageway for delivering a gas towards the exit orifice. The torch assembly further includes a filter coupled to the tip at the proximal end thereof, the filter disposed between the set of openings and the gas passageway for restricting flashback into the torch head.

Abstract: In a structure for cooling a constituent member of a gas turbine engine using a working gas of the gas turbine engine as a cooling medium, on a wall surface of a passage wall formed from a part of the constituent member and facing a cooling medium passage through which the cooling medium flows, a recess formed on the wall surface of the passage wall and a projection formed on at least a part of a peripheral edge of the recess are provided.

Abstract: A burner with a flame detector is provided. An atomizing chamber has an aperture. A flame tube is in front of the atomizing chamber, adapted to direct combusting fuel introduced by the atomizing chamber along an interior of the flame tube. A photodiode circuit is located behind the atomizing chamber. A filter is adapted to filter out signals from the photodiode outside of a predetermined bandwidth. Light from combusting fuel in the flame tube reaches the photodiode through the aperture. The output of the filter indicates the presence or absence of the flame in the flame tube based on at least whether enough light received and converted by the photodiode has a flicker rate within the predetermined bandwidth.

Abstract: The present invention discloses a portable cooking stove comprising a base portion adapted to hold a heating means, and a removable top member for supporting a cooking implement, characterised in that the base portion comprises a support member for supporting the top member, the support member comprising a plurality of leaves, the intended lower edge of each vane being pivotally connected to the circumference of the base portion such that, in use, the leaves will extend upwardly from the base portion in order to support the top member, and when not in use, the intended upper edge of the leaves are pivoted towards the centre of the base portion.