Abstract: The invention relates to a safety for a repeating rifle, with a safety slider (4) arranged displaceably between a safety position and an unsecured position on a lock (2), and a locking element associated with the safety slider (4) for blocking or releasing a firing pin nut (8) displaceably arranged in the lock (2). The locking element according to the invention is constructed as a safety lever (22), rotatable about a transverse pin (24), with a control part (23) engaging with a control groove (19) on the firing pin nut (8).

Abstract: In one example, an accessory mount for a gun, such as a machine gun, can include a base configured for attachment of the accessory mount to the gun, a holding mechanism for fixing the position of the base in relation to the gun, and an elongated accessory mounting arm coupled to the base and extending forwardly therefrom, the arm comprising a beam having a vertical web with at least one flange disposed at an upper and/or a lower end thereof.

Abstract: A sighting device is mountable to a gun. The device includes a light source (preferably a laser), a power source connectable to the light source and a mount attachable to the gun so that the laser is juxtaposed either the top surface of the gun or a side surface of the gun. In one embodiment, the sighting device includes a bottom rail mountable in a slot on the gun, wherein the slot is preferably positioned on the top surface of the gun. The sighting device may also include a mechanical sight that functions as the rear mechanical sight on the gun and/or a secondary light source.

Abstract: A fire-control system comprising -a housing, -a light channel, through which a user may directly observe a target and receive visually displayed information simultaneously, said light channel comprising partially reflective optics a light source, for visualization of a reticle to the user via the partially reflective optics, -means for receiving a measure of the distance to the target a processor, for determining the adequate position of the reticle, based on the distance to the target, and for controlling the light source to emit light so that the reticle is visualized at the adequate position, wherein the light source is an array capable of selectively emitting light in well defined locations on its surface.

Abstract: A fishing pole includes an outer tubular member having a tubular wall defining an axial hole, and an inner rod member inserted telescopically and axially into the outer tubular member. The tubular wall has small and large diameter wall sections, and a shoulder between the small and large diameter wall sections. The inner rod member has an extension portion extending out of the outer tubular member through the small diameter wall section, an enlarged engaging end portion provided at one end of the extension portion, a plurality of angularly spaced-apart openings extending axially from the enlarged engaging end portion toward the extension portion, and a plurality of compressible resilient pawl plates each extending axially between two adjacent ones of the openings. The resilient pawl plates are compressed within the large diameter wall section, and frictionally contact an inner surface of the large diameter wall section.

Abstract: A combination bait storage and transport holder, and fish lure apparatus and related method is disclosed that enables a user to store and transport bait and lure water life (target fish), all with the same container. This apparatus comprises a transparent or semitransparent (substantially transparent) material intended for bait storage, bait transportation and complete submersion in water for fish luring, and comprises at least one fluid passage opening through which water can pass but the bait cannot pass. Once submerged in water, this allows any native water life present to see and/or smell the bait and thereby be lured and attracted to the bait, and allows oxygenated water and bait aroma to flow into and out of the apparatus. There are also one or more closures whereby all openings can be closed at will so that water does not leak water during storage and transportation.

Abstract: The gnat vac is a trap designed for indoor gardens to eliminate flying insects, and is used primarily at night or during lights out time of operation. The unit utilizes a green light bulb to naturally lure flying insects to inlet of trap, in which they are vacuumed into receptacle and contained in a filter for easy disposal. Effectively controlling flying insects without disrupting photo period of flowering plants.

Abstract: Applicants provide an application for a dust insecticide for pest control in residential, commercial or other properties. The applicator consists of an assembly, including a dust container and a compressed gas cylinder. The compressed gas cylinder is connected by a high pressure hose to a blowgun that has a barrel attached to it. At the end of the barrel is a nozzle. The nozzle receives dust through an elongated tube from a dust container. A venturi in a nozzle with a small opening proximate to the venturi creates a vacuum when compressed air is forced through it and sucks in dust from the dust container. The insecticide dust mixes with the compressed gas and is fired out of an outlet tube connected to the nozzle. The stream of high pressure compressed gas with an insecticide mixed to be directed at areas around building structures where pests may be found.

Abstract: The present invention relates to a process for producing enzymes and single cell oil. The process comprises that microorganisms capable of producing both single cell oil and enzymes are cultivated under conditions suitable for single cell oil production and enzyme production in a single cell oil production process. A microorganism culture comprising single cell oil and enzymes is obtained and at least part of the microorganism culture, of the supernatant and/or microorganism cells separated from the microorganism culture, of protein fraction enriched from the supernatant, and/or of protein fraction obtained from the cells is used as an enzyme preparation or as a source of enzymes. Single cell oil is recovered from the microorganism cells and used as biofuel, component of biofuel or as a starting material for biofuel production. Enzymes produced according to the process are used in the same or in another industrial process.

Abstract: Disclosed is an integrated process comprising first and second biotechnical processes. The first process produces biofuel and/or starting material for biofuel and uses a microorganism capable of producing enzymes. The second process produces biofuel and/or starting material for biofuel. In the integrated process, the microorganisms are cultivated and biofuel and/or starting material for biofuel and enzymes are produced. The microorganism culture, supernatant or a protein enriched fraction or a dilution of the supernatant comprising catalytically active enzyme(s) are introduced into the first and/or into the second process, or feedstock for the process(es) is treated. The invention relates also to use of the produced enzymes in biofuel production process or in other applications as an enzyme preparation or a source of enzymes. The invention relates also to use of the produced lipids and alcohols as biofuel, a component of biofuel or a starting material for biofuel production.

Abstract: The present invention relates to an integrated process, which comprises a single cell oil production process, and a pulp and/or paper industry process. The process comprises that in the single cell oil production process is used a microorganism capable of producing lipids or lipids and enzymes when cultivated on a medium comprising organic material from pulp and/or paper industry. Lipids or lipids and enzymes are produced by said microorganisms in the single cell oil production process and/or in a process connected into it. The present invention relates also to use of lipids produced in the process as biofuel or as a component of biofuel or as a starting material for biofuel production and use of enzymes produced in the lipid production process in pulp and/or paper industry or in other applications as an enzyme preparation or as a source of enzymes.

Abstract: Novel redox based systems for fuel and chemical production with in-situ CO2 capture are provided. A redox system using one or more chemical intermediates is utilized in conjunction with liquid fuel generation via indirect Fischer-Tropsch synthesis, direct hydro genation, or pyrolysis. The redox system is used to generate a hydrogen rich stream and/or CO2 and/or heat for liquid fuel and chemical production. A portion of the byproduct fuels and/or steam from liquid fuel and chemical synthesis is used as part of the feedstock for the redox system.

Abstract: A biomass torrefaction system is provided which enables a continuous torrefaction process that involves the introduction of biomass particles into a rotating reactor drum having a low oxygen environment. The particles are conveyed through the drum by a heated gas stream and simultaneously torrefied thereby. Gas exiting the drum is recirculated back to a heat source for reheating the gas prior to reentering the drum. A method of biomass torrefaction is also provided.

Abstract: A water retention device is used in conjunction with a plant container. The water retention device comprises a resilient plate structure forming a central cover, a sidewall extending from a perimeter of the central cover, and a slot extending through the sidewall and a portion of the central cover. The sidewall engages an inner surface of the plant container and supports the central cover at a spaced distance above a growth medium. The resilient plate structure is manually configurable to open the slot for receiving a plant stem so that the plant stem extends through the central cover. Water may be supplied to the plant container using either a spray stake disposed under the central cover or using a trough formed in the central cover. Where a spray stake is used, the inner surfaces of the sidewall and central cover may include ribs that deflect water.

Abstract: An adjustable stake assembly forms a plant support, lattice, fence, plant holder, recreational or decorative structure. The stake assembly includes a universal stake support having a pointed angular tip that penetrates a surface, a body portion with a protrusion having a stake aperture, and a horizontal member extending perpendicularly from said body portion and said tip. At least one stake segment has a central portion. A lateral and distal end is appointed to be removably snapped-onto the universal stake support. A segment aperture is appointed to receive another stake segment for vertically stacking a plurality of the stake segments. In another embodiment, the stake segments include at least one lateral connector section. The stake segments can be interconnected to one another for horizontal cross-connection when forming plant supports, lattices, fences, or other structures.

Abstract: A lighting fixture for facilitating plant growth and a light emitting component. The fixture includes a single light emission source LED device which provides at least two emission peaks in the wavelength range of 300-800 nm and at least one of the emission peaks has Full Width of Half Maximum (FWHM) at least 50 nm or higher. The emission peaks of the LED match well with a plant photosynthesis response spectrum and is therefore particularly suitable for high efficiency artificial lighting.

Abstract: A floral sleeve is utilized in a method to cover a pot. The floral sleeve has an inwardly folded bottom gusset for forming a bottom in the sleeve which is concealed by the lower sidewall of the sleeve when the sleeve is opened and the pot is disposed therein. The sleeve may have a detachable upper portion for enclosing a floral grouping disposed within the pot, and may also have a skirt insert or extension attached thereto.

Abstract: Disclosed herein are media, systems and methods for achieving micropropagation of monocotyledonous plants.

Abstract: A reactor has multiple reactor modules for endothermic reactions. Each reactor module comprises a reaction channel enclosed by a tubular boundary wall and having first and second ends. The reactor module has an inlet element for introducing reactants into the reaction channel. The inlet element is arranged at the first end of the reaction channel. The reactor module has an outlet element for discharging the reaction products from the reaction channel. The outlet element is arranged at the second end of the reaction channel. The reactor module has a heat supply device in the form of a porous burner arrangement that is arranged on the outside of the tubular boundary wall of the reaction channel. Because a porous burner arrangement is used instead of a heat source having catalytic combustion, high reactor performance is achieved at an economical price. The porous burner is substantially less expensive than a combustion catalyst.

Abstract: A rotating entrance assembly is provided, the rotating entrance assembly including a rotating base, a motor in driving connection with the rotating base, and first and second shielding components that are arranged on the rotating base. A passageway is defined between the first and second shielding components.

Abstract: A louver blind structure comprises a frame with a plurality of louver members pivotally mounted at each longitudinal end thereof to the frame so as to pivot between open and closed positions. An elongated member is movable relative to the frame and is so positioned as to engage the louver members. An actuator is mounted to the frame for selectively imparting a movement to the elongated member. When imparting a movement to the elongated member the louver members engaged thereby are caused to pivot between the open and closed positions. A kit comprising this actuator and the elongate member for a louver blind structure is also provided.

Abstract: A door assembly that includes a normally fixed door panel disposed between an ingress opening and an egress opening. The door assembly includes a first sliding door panel slidable between a 1) closed position wherein the first sliding door panel blocks the ingress opening and 2) an open position wherein the first sliding door panel is in an overlapping configuration with the normally fixed door panel so as to permit persons to egress through the egress opening. A second sliding door panel is slidable between a 1) closed position wherein the second sliding door panel blocks the egress opening and 2) an open position wherein the second sliding door panel is in an overlapping configuration with the normally fixed door panel so as to permit persons to ingress through the ingress opening. The normally fixed door panel is pivotable to a breakout open position upon receiving a pivoting actuation.

Abstract: A drive mechanism for a door operator comprises a drive member and a driven member. The drive member is adapted to be operably connected between a motor assembly for rotating the drive member and a door closer assembly rotating with the driven member. The drive member and the driven member both include a protrusion. The driven member protrusion moves in the free space defined by driving surfaces of the drive member protrusion. Rotation of the drive member from a first angular orientation to a second angular orientation causes rotation of the driven member for powered opening of the door. The driven member protrusion moves in the free space without engaging the protrusion surfaces when the door is opened manually and allowed to close.

Abstract: An internally powered sliding panel has a power source and drive train contained internally within the stiles and rails of a frame. A driven wheel is rotatably mounted on the frame and connected to the power source via the drive train. The panel may further include a lift system including a second power source, a lift mechanism, and a lift drive which are contained internally within the stiles and rails of the frame. The power sources, drive train, lift mechanism, and lift drive may be contained completely inside the stiles and rails of the frame. The movement of the panel along a fixed path, and the raising and lowering of the panel, may be regulated by a control system. The control system includes a microcontroller and sensor used to determine the position of the panel.

Abstract: A regulator device for a vehicle door window pane includes a lift arm connected to a door window pane and an equalizer arm rotatably connected to the lift arm, connected to the door and the door window pane. The lift arm includes a through-hole, a flange wall, and a protrusion that defines an annular clearance between the protrusion and the flange wall and protrudes by a greater amount. The equalizer arm includes a first arm in contact with the protrusion, and a second arm in contact with the other side of the lift arm. A rotational axial protrusion rotatably engaged in the through-hole is formed on one of the first and second arms, and a fixing portion fixed to the rotational axial protrusion outside the through-hole is formed on the other of the first and second arms.

Abstract: A method is provided for making an annealed door skin or composite door assembly. At least the door skin is formed of a composition comprising a thermoset binder and fiberglass. The door skin, alone or in combination with other parts of a door assembly, is subjected to annealing to make the annealed door skin. The process of annealing comprises the step of heating the door skin, alone or in combination with other parts of the door assembly, above the glass transition temperature yet below the thermal degradation temperature of the thermoset binder for a sufficient amount of time to cause release internal stresses in the door skin, then the step of cooling the door skin.

Abstract: Provided is a panel, the panel including a parent panel, a removable panel formed from the parent panel and configured to be removed from the parent panel, at least one tab portion which adjoins the removable panel to the parent panel, and at least one gap formed between the parent panel and the removable panel. The at least one gap extends around an outer periphery of the removable panel, except at the at least one tab portion.

Abstract: A removable tailgate gap cover for preventing ingress of debris in a tailgate gap. The gap cover comprises an elongated cover plate having a top surface, a bottom surface, two longitudinal edges and an elongated support bar having an upper end and a lower end, wherein the upper end is fixedly attached to and substantially centrally aligned with the lengthwise direction of the bottom surface. The elongated support bar comprises a magnetic attaching means disposed along the lower end of the elongated support bar for attaching the gap cover to the floor of the end portion of the truck bed.

Abstract: A drainage structure of a weather strip includes an installation base member installed on a door opening edge of a retractable roof vehicle; a hollow seal part provided downward on an outer-cabin side with respect to the installation base member, which makes elastic contact with a top end of a door glass; and a seal lip extending from a lower side of the hollow seal part toward an outer-cabin side, of which the top end curves upward and makes elastic contact with an inner-cabin side surface of the door glass, thereby forming an eaves-trough-shaped water receiving part, wherein: a lower side wall surface forming the hollow seal part, with which the top end of the door glass makes elastic contact, has a bead part formed at least on an elastic contact position thereof with end of the door glass.

Abstract: A center-channel protector for a vehicle sash door is arranged between a main sash and a center channel. A body of the protector has an H-shaped upper-end surface which is compatible to cover the upper end of the center channel. The body integrally includes a pair of branch covering portions corresponding to a pair of branch portions constituting the center channel and a middle covering portion disposed between the branch covering portions so as to connect the both branch covering portions therewith. An engaging portion is provided with the body and is mechanically engaged, in a direction intersecting a vertical direction, with an engaged portion which is provided with a center channel side. In collaboration with the engaged portion, the engaging portion constitutes a fastening mechanism by which the protector is fastened on the center channel.

Abstract: There is provided a seal structure for vehicle that includes a weather strip member 8 installed to a retainer member 9 provided to a circumference edge of a body aperture 7 and having a substantially “U” shape in section. The weather strip member 8 includes a primary seal lip 10 installed to an outer-cabin side surface part 9a of the retainer member 9 and makes a contact with an outer-cabin side surface 6b of a glass panel member 6, and a secondary seal lip 11 installed to an inner-cabin side surface part 9b and makes a contact with an inner-cabin side surface 6c of the glass panel member 6. The weather strip member 8 further includes a hollow seal part 12 installed near a bottom surface part 9c of the retainer member 9 and makes an elastic contact with an periphery end 6a of the glass panel member 6.

Abstract: A sealing structure, of which upper end part 101 makes elastic contact with a roof weather strip 20 which is installed along a side edge of a roof 1 and extending in a front and rear direction, includes an installation base member 11 installed on a quarter sash 5 provided on a front side of a quarter window glass 4 of a retractable roof vehicle, (that lifts and lowers together with the quarter window glass 4), a hollow seal part 12 which makes elastic contact with a side window glass 3, and a seal lip 13. The upper end part 101 has a seal wall 30 formed thereon, which covers a front side corner part 110 of the upper end part 101 from an inner-cabin side, which is protrudingly formed toward an outer-cabin side and makes elastic contact with the side window glass 3 from an inner-cabin side.

Abstract: A frameless access panel comprises a panel member having an inner surface and an outer surface, a mounting member mounted to the inner surface and comprising at least one fixed tab extending outwardly therefrom, the fixed tab being spaced from a first edge of the panel member, at least one moveable member configured to slide along a respective track adjacent the inner surface between a first position and a second position, the first position being spaced from a second edge of the panel member, the second edge being opposite the first edge, and the second position being spaced further from the second edge than the first position, the moveable member comprising a tab extending outwardly therefrom, and a respective biasing member providing a force for biasing the at least one moveable member towards the first position. The frameless access panel is generally non-combustible.

Abstract: A frameless access panel comprising a panel member having an inner surface and an outer surface, a mounting member mounted to the inner surface and comprising at least one fixed tab extending outwardly therefrom, the fixed tab being spaced from a first edge of the panel member, and at least one cam latch member comprising a cam latch rotatable around an axis spaced from a second edge of the panel member, which is opposite the first edge. The cam latch is rotatable between a first position and a second position, where the second position is spaced further from the second edge than the first position. The frameless access panel is generally non-combustible.

Abstract: An activatable barrier has a barrier body that can be moved between a first position and at least one second position. An actuation device is configured for moving the barrier body from the first position into one or the other of the second positions. A control device, which is connected to the actuation device, is configured to control the actuation device as a function of a control signal for moving the barrier body. The barrier body, in the first position, is recessed into a delimitation of a space, through which a flow of people is guided. In the at least one second position, the barrier body projects from the delimitation, so that the flow of people is redirected or braked by the barrier.

Abstract: A cutting element is described comprising a super-hard cutting table, a substrate and a metal or alloy layer. A surface of the superhard cutting table, is joined to the substrate by means of the metal or alloy layer which is positioned between them. At least a first surface of the metal or alloy layer and at least a first surface of the cutting table are co-operatively shaped with each other such that the co-operative shaping substantially prevents relative movement between the cutting table and the metal or alloy layer.

Abstract: A reinforced inflatable structure includes an inflatable member having a longitudinal axis. The member includes a bladder and a braided restraint layer mounted to the bladder. A plurality of spaced supports is mounted on the member and extends outwardly therefrom. A plurality of spaced bracing cables are connected at each end to a respective one of the plurality of supports. The cables are oriented generally parallel to the longitudinal axis of the member and are held at a generally fixed distance from the member by the supports. The inflatable member tensions the bracing cables rendering them capable of resisting bending.

Abstract: An elevated platform system includes a base support structure and a plurality of fiber reinforced polymer composite panels. The base support structure includes pilings secured to a ground surface and attachment cradles coupled to the pilings. The attachment cradles are in electrical continuity with the ground surface. The fiber reinforced polymer composite panels include a panel body portion, fibrous material surrounding the panel body portion, a non-conductive matrix forming at least a portion of an outer-most layer of the fiber reinforced polymer composite panel, and an electrically-conductive layer at least partially embedded in the non-conductive matrix. The fiber reinforced polymer composite panels are coupled to the attachment cradles, such that the electrically-conductive layer of the fiber reinforced polymer composite panel is in electrical continuity with the ground surface.

Abstract: The invention includes a substantially rigid body providing underlying support for a filter screen. The invention further includes at least one heating wire disposed adjacent to the body, which is formed of heat conductive material. The body is configured with multiple ribs extending up from a floor so that heat transfer from the body to the screen can occur in a variety of different locations to keep the screen sufficiently heated. The body also includes a wing for interfacing with roofing and openings to allow water filtering through the screen to migrate down into the gutter. A cover overlies a channel, which contains one or more of the heating wires. The system includes a flange attached to the body and extends into the gutter enhancing the heat transfer from the body to within the gutter to keep the water flowing in gutter.

Abstract: The invention relates to a partition system (10) comprising a plurality of wall elements (1) merging one into another, wherein at least one wall element (1) is designed as a stepped element (150), and wherein at least one wall element (1) is designed as a corner element (250).

Abstract: Disclosed are various embodiments of multi-component spin hardware for connecting structural framing members to other structural framing members while allowing desired portions of the framing members to pivot, selectively displacing the framing members to variable positions. The spin hardware generally includes a top bracket, a bottom bracket, and a counter bracket assembly. The spin hardware bracket assemblies can be installed along a vertical axis to provide maximum flexibility and creativity while pivoting structural framing members in any number of configurations.

Abstract: In one aspect of the present invention, a wall assembly may be used to divide the area of a particular living space. The wall assembly may comprise a first and second panel. The first panel may reside within an internal cavity of the second panel. The first panel may also extend beyond the second panel such that both panels may collectively form a wall. A cable may connect the wall assembly to an overhead structure such that it may pull the wall into a storage space of the overhead structure.

Abstract: The present invention provides a layer-by-layer double-hoop sunflower-shaped cable dome structure and its construction method. A cycle of jack posts of an elevation forms a layer that comprises several units with same geometric characters and of same quantity except of the top layer. The units are arranged with same space on each layer. The upper end and the lower end of the jack post of each unit are installed with an upper cable bar node and a lower cable bar node respectively. The upper cable bar node is connected with two upper stayed cables of the present layer at one side, two upper stayed cables of the layer above and two lower stayed cables of the layer above at another side and an upper hoop cable going through the middle of the upper cable bar node. The lower cable bar node of the present layer at the same side of the upper stayed cables is connected with two lower stayed cables of the present layer and a lower hoop cable going through the middle of the lower cable bar node.

Abstract: A tower section for a wind turbine tower structure comprises at least two shell segments defining, in an assembled condition, a substantially hollow structure, and including first connecting means for mutually joining two adjacent shell segments along a joint, which comprise a column of concrete arranged overlapping at least part of the joint between adjacent shell segments. A method for building a tower section for a wind turbine tower structure and a wind turbine comprising a nacelle having rotatable blades and a vertical tower made of at least one of such tower sections are further provided.

Abstract: A barrier and a method to bar the passage of termites across the surface of a structure is provided, the barrier being applied to the surface of the structure and comprising a sticky adhesive substance capable of obstructing and entrapping termites which venture onto the surface of the adhesive.

Abstract: A method of constructing a tower structure by assembling a set of coaxial telescopic sections 2, 3a, 3b in position on site and then raising the assembled sections using hydraulic crawler jacks 8 and tendons 5. The telescopic sections are assembled or constructed in situ, starting with the inner section and then each subsequent section around the outside of the previously constructed sections. Each individual tower section may be cast in situ or assembled from multiple pre-fabricated segments. This method permits the construction of very tall structures while obviating the need for very large cranes. It also removes the design constraints on the height of the individual telescopic sections.

Abstract: Systems mitigate structural damage by selectively engaging energy-absorbing structures only during impact events, including aircraft impacts. Systems include lateral dampening devices and/or seismic bearings between a structure and its foundation. Lateral dampening devices include a restorative member and/or reactive member configured to rigidly join the structure and the foundation and dampen reactive movement after the structure moves toward the foundation during an impact event. Seismic bearings include a top plate connected to the structure, a bottom plate connected to the foundation, and a resistive core between the top plate that dampens relative movement between the structure and the foundation. Seismic bearings may include a capture assembly that rigidly joins and dampens reactive movement between the structure and the foundation during an impact event.

Abstract: The present invention relates to a building panel. The building panel includes a core including first geopolymer concrete. One or more protective layers are located adjacent the core. Each protective layer includes second geopolymer concrete of greater density than the first geopolymer concrete. In one embodiment, passages are defined along which air can move within the core.

Abstract: An optimized building integrated hybrid roofing system is disclosed. The system comprises a plurality of metal battens having a longitudinal channel mounted horizontally onto a plurality of wooden battens, a plurality of solar electric roof tiles mounted on the metal battens and connected in series to form a string, a thermal tubing/heat pipe mounted along the longitudinal channel, at least one manifold containing liquid connected with the thermal tubing/heat pipe, an inverter connected to each string, heat exchangers connected to the thermal tubing/heat pipe, and a pump connected between the thermal tubing/heat pipe and the heat exchangers. The solar electric roof tiles generate DC from solar energy and the inverter converts the DC to AC to feed to a utility grid. The metal battens collect solar energy and converts into thermal energy resulting in producing hot water.

Abstract: The present relates to a sidelite assembly having first and second panels and a window. Each of the panels has an inner edge extending outwardly from a major planar portion and surrounding an opening. The inner edge includes a first portion having a ridge extending outwardly from a distal end thereof and a second portion having a channel extending inwardly from the distal end. An outer edge extends outwardly from the major planar portion and adjacent a periphery thereof, and includes a first portion having a ridge extending outwardly from a distal end thereof and a second portion having a channel extending inwardly from the distal end. The ridges of the first panel are aligned with and received in the channels of the second panel. The window is disposed within the opening.