Abstract: A protective device that may be used to shield the corner of an object from damage during shipping, storage, handling or the like comprises a top member, an outer wall, an inner wall opposite the outer wall and a side wall. The walls are connected (either directly or indirectly) to the top member and extend downwardly therefrom, and the side wall and outer wall meet to form an acute angle (e.g., a 45 degree or a 67.5 degree angle). The protective device may also include a raised lip that extends upwardly from the top member along at least a portion of the periphery of the top member and may include ribs that are disposed on the top surface of the top member.

Abstract: A sliding rail assembly auto locking structure for drawer is disclosed comprised of a holder base, a swivel hook, a slide, two return springs, an actuating block. When an arched block of the swivel hook is approaching a recess in the holder base for positioning, the arched block does not fall to the recess directly, and at this time, oblique guide grooves of the swivel hook are moved over associating guide blocks of the holder base to guide the arched block into the recess slowly and smoothly, and therefore the inner sliding rail of the sliding rail assembly is moved with the drawer smoothly without vibration.

Abstract: The invention concerns a panel adjustment device for a drawer (2) that is equipped with a front panel (3), which is located in a cabinet (1) by means of a rail system (4) with at least one each of a drawer rail (10), a cabinet rail (18) and, optionally a drawer-décor profile (6) that is guided on both sides lengthwise; whereby, the panel adjustment device is suitable for changing the enclosed inclination angle (9) between the vertical level of the front fore side (1a) of the cabinet (1) and the vertical level of the front panel (3) of the drawer (2), and the panel adjustment device works directly or indirectly between the drawer (2) and the drawer rail (10) by a lifting and lowering device (15, 12; 23) that has a lifting and lowering element (11) so that a swiveling of the drawer (2) (and with it, the panel [3]) is possible around a swiveling axis (24); whereby, the swiveling axis (24) runs between the front panel (3) and the lifting and lower element (11), and the distance between the swiveling axis (24) and

Abstract: A capacitive load driving circuit which includes an operational amplifier, a pulse width modulator, a digital power amplifier, a first filter, a first feedback circuit and a second feedback circuit. The operational amplifier outputs a differential signal between a signal fed back to the inverting input terminal and an input signal inputted to the non-inverting input terminal. The pulse width modulator pulse width-modulates output from the operational amplifier and outputs a digital signal. The digital power amplifier amplifies power of the digital signal. The first filter smooths output of the digital power amplifier and inputs the smoothed signal to the capacitive load as the driving signal. The first feedback circuit feeds back the driving signal outputted from the first filter to the inverting input terminal of the operational amplifier.

Abstract: An apparatus for driving an ink jet printer including actuators for first and second pressure chambers communicating with first and second nozzles, the printer operating in a first mode in which the first and second nozzles are permitted to eject a first and a second ink and in a second mode in which only the first nozzles are permitted to eject the first ink, the apparatus including an obtainer which obtains a mode signal indicating in which one of the first and second modes the printer is to operate, and image data indicating whether each of the first and second nozzles is to eject a corresponding one of the first and second inks; and an applier which applies, based on the signal and the data, a voltage to each actuator such that when the printer is to operate in the first mode, a first voltage not equal to zero V is applied to an actuator corresponding to an operative nozzle of the first and second nozzles that is to eject a corresponding one of the first and second inks and subsequently a first subsequent

Abstract: Ink type information is read by a read and write system (62) from a semiconductor storage system mounted on ink cartridges (9a to 9d) attached to a cartridge holder (8). A decision control system (61) decides whether or not ink type information has already been stored in ink type storage system (63), and stores the ink type information thus read when the ink type information is not stored. In the case in which the ink cartridge is exchanged, the ink type information is similarly read and it is decided whether or not the same ink type information is identical to the ink type information stored in the ink type storage system (63). If they are not identical to each other, the operation of the recording apparatus is inhibited and a display system (68) is caused to display an error message thereon.

Abstract: The image processing method for specifying dot arrangements for respective ink components according to image data, when forming an image on a recording medium by means of dots of inks of n colors, where n is any positive integer, the method comprises the steps of: calculating color correlation and spatial frequency components from the image data; specifying a dot overlap function for controlling overlapping between dots of the ink components, according to the calculated color correlation and spatial frequency components; calculating an ink recording rate of each of the inks from the image data; specifying the dot arrangement of a first ink component by means of a prescribed method, according to the ink recording rate; and determining a dot arrangement for the inks of the n colors, in such a manner that, taking k to be an integer where 2?k?n, the dot arrangement of the kth ink component is specified according to the ink recording rate of the kth ink component, and the previously specified dot arrangement and d

Abstract: Line heads are arranged along the transfer direction of a recording medium. Each line head has a nozzle surface in which nozzles are provided over a width direction of the recording medium. Purge units each corresponding to one of the line heads are arranged along the transfer direction of the recording medium at positions which deviate from the recording medium in the width direction. Each purge unit cleans the nozzle surface of a corresponding one of the line heads.

Abstract: A Cleaning fluid discharge openings capable of supplying a cleaning fluid is provided around a suction port mounted in opposition to a nozzle hole. A negative pressure generating source performs suction from the suction port to take out the cleaning fluid from the cleaning fluid discharge openings and to contact the cleaning fluid, thus taken out, with a neighborhood of the nozzle hole, and the cleaning fluid thus contacted is sucked and recovered from the suction port. A member of the suction port is made of a porous resin and the cleaning fluid discharge openings comprise pores formed on a surface of the porous resin. A cleaning fluid supplied to the porous resin is taken out from the pores formed on the surface of the porous resin to clean the neighborhood of the nozzle holes and to simultaneously clean the suction port as a wiping member.

Abstract: A printer includes a cleaning mechanism that reliably performs an operation of cleaning a liquid ejecting head with a small amount of driving energy. The cleaning mechanism includes a cap manufactured by coinjection molding of a core part and an elastic part. The cap includes a bottom surface, an outer wall, and a partition wall dividing a cap inner space surrounded by the outer wall into two. A ratio of the elastic part in the partition wall is higher than that in the outer wall. With this structure, the partition wall is more elastically deformable than the outer wall. When the cap comes into contact with a nozzle surface of a recording head and covers nozzle rows, the outer wall comes into contact with the nozzle surface with a larger stress compared with the partition wall, and seals chambers where the nozzle rows on the nozzle surface are exposed.

Abstract: An improved ink jet printhead for an ink jet printer and method therefor. The printhead includes a semiconductor substrate containing ink ejection devices. A thick film layer is attached to the substrate. A nozzle plate is attached to the thick film layer. The nozzle plate contains a plurality of ink ejection nozzles corresponding to the ink ejection devices. The printhead contains flow features having a height dimension and a width dimension formed therein for flow of ink to the plurality of ink ejection devices for ejection through the nozzles. At least a portion of the flow feature dimensions for at least one of the nozzles is formed in both the thick film layer and laser ablated in the nozzle plate, wherein the thick film layer contains at least 12% of the flow feature dimensions.

Abstract: An inkjet printhead heater chip has an ink via asymmetrically arranged in a reciprocating direction of inkjet printhead movement. The ink via has two sides and a longitudinal extent substantially parallel to a print medium advance direction. A column of fluid firing elements exists exclusively along a single side of the two sides. The heater chip and ink via each have a centroid and neither resides coincidentally with one another. Preferably, the heater chip centroid resides externally to a boundary of the ink via. In other aspects, the column of fluid firing elements can be a sole column or plural and may be centered in the reciprocating direction. The ink via can be a sole via or plural. The heater chip can be rectangular and the ink vias can be closer to either the long or short ends thereof. Inkjet printers for housing the printheads are also disclosed.

Abstract: An ink jet head is provided that can effectively suppress operational interferences among adjacent cavities, and is capable of ultra-high-density and high-speed printing. The ink jet head is equipped with a plurality of cavities each having a volume that is variable by a deformation operation of a piezoelectric element, wherein beam members are provided between inner walls that interpose the cavity.

Abstract: The liquid ejection apparatus is capable of reducing the increase of the viscosity of a liquid due to evaporation of the liquid and also for reducing the quantity of the atmospheric air dissolving into the ink. A liquid seal used for a liquid ejection apparatus which performs recording by ejecting a liquid, at least a part of the liquid seal is formed from a layer compound mixture material including a high molecular compound and an inorganic layer compound. The liquid seal seals the liquid. For example, the liquid seal is an ink cartridge accommodating the liquid therein, or an ink guide member for supplying the ink in the ink cartridge to a recording head unit.

Abstract: The ink cartridge includes an ink supply port formed at a position, offset to one side, of a wall configuring an ink container body; a positioning projecting portion, formed on one wall out of two opposing walls adjacent the wall, whose upper surface and side portion are regulated imposition when the cartridge has been mounted on a recording apparatus; a lever, formed on the other wall out of the two walls, maintaining a normal hinged-open state and having a projection that is forcibly displaced outward when the cartridge is mounted on the recording apparatus; and electrodes that are connected to a memory unit storing information on the ink in an ink container and formed on the positioning projecting portion.

Abstract: An ink jet recording apparatus for recording by discharging an ink onto a recording medium to be recorded, has a first ink tank for containing a first ink, a second ink tank for containing a second ink different from the first ink, and a holder enabling the ink tanks to be loaded therein. The ink tanks are provided with distinguishing members so that the holder is, though capable of being loaded with both of these two types ink tanks in a state before loading the ink tanks into the holder, loaded with one of the ink tanks with the result that the other ink tank becomes unable to be loaded into the holder. The holder is provided with a changeover mechanism corresponding to the distinguishing members of the ink tanks.

Abstract: An ink channel is formed in an inkjet head, so that ink introduced through an ink inlet passes through a pressure chamber and is ejected out of a nozzle. A filter for filtering the ink is disposed in the ink channel. The filter includes a depression formed in a plate, and a plurality of through-holes formed in the bottom of the depression. The filter has small channel resistance and is easy to handle.

Abstract: An image recording device has: a first recording head which discharges a first ink for a first image forming process; a second recording head which discharges a second ink for a second image forming process; a curing section which cures an ink on a recording medium; and a controller which controls the curing section to cure the first ink on the recording medium, and controls the second recording head to start discharging the second ink after a conversion of the first ink on the recording medium becomes not less than 30%.

Abstract: An eyeglass frame assembly for coupling clip-on auxiliary spectacles to primary spectacles. The primary spectacles having a pair of cavities formed on one of the frame and the inside surface of rear extensions. The clip-on spectacles having a pair of insertable members mounted on a pair of hinged extensions, wherein the insertable members are capable of positively engaging the cavities. The hinged extensions allow the clip-on spectacles to swing up and to place the auxiliary lenses mounted within the clip-on spectacles to be outside the vision path of the user.

Abstract: An auxiliary eyeglass frame is provided with a position-adjustable device pivotally securing to the bridge. The position-adjustable device includes a mounting block, at least one magnetic piece is provided in the mounting block, two through bores are respectively provided adjacent to the left side and right side of the at least one magnetic piece, each through bore is provided to receive one fixing piece and one pivotal connecting article, and the pivotal connecting articles are disposed on the bridge of the auxiliary eyeglass frame.

Abstract: An eye target apparatus and method helping to control an operative eye focus line of sight position during medical procedures on the operative eye of a cooperative awake patient. The apparatus includes a housing for occluding substantially all visual perception from an exterior environment for a non operative eye, the housing including a cover, with an internal surface that forms a plane approximately perpendicular to the non operative eye line of sight axis. Also included is a visually perceptible element adjacent to the internal surface being in visual communication with the non operative eye and structure for moving the visually perceptible element within the plane to any selected position, the apparatus is operational to help the non operative eye focus on a selected line of sight position upon the visually perceptible element with the result in assisting in the operative eye achieving a stable selected line of sight position.

Abstract: An eye's optical characteristics measuring system, comprising a first target projection optical system for projecting a target image on a fundus of an eye under test, a first photodetecting means for receiving the target image reflected from the fundus of the eye under test from the first target image projecting optical system, an ocular refractive power measuring unit for measuring ocular refractive power of the eye under test based on photodetection result from the first photodetecting means, a second target projecting means for projecting a spot-like target image to the fundus of the eye under test, a second photodetecting means for receiving the target image reflected from the fundus of the eye under test, and an eye's optical characteristics measuring unit for measuring ocular refractive power based on two or more images acquired at a predetermined refractive degree pitch before and after centering the refractive degree of the eye under test obtained by the second photodetecting means.

Abstract: An autoclavable and sterilent-resistant ophthalmoscopy lens system having a plastic contact lens, and at least one image forming lens element. An ophthalmoscopy lens system having a contact lens element, an image forming lens and a retaining ring is also provided.

Abstract: A perimeter for examining a visual field condition of an examinee's eye, includes: a target presenting unit a response unit brain activity detecting unit which detects an activity condition of a visual cortex of the examinee; and an operation unit which determines if the response with the response unit with respect to presentation of the target is resulted from a fact that the examinee can perceive the target based on a detection result of the brain activity detecting unit and which obtains the visual field condition on the basis of the presentation condition of the target and the response result in consideration of the determination result of the brain activity detecting unit.

Abstract: A projection video display includes at least one laser for delivering a light beam. The display includes a beam homogenizer and a condenser lens. A scanning arrangement is provided for scanning the light in beam in a particular pattern over the condenser lens in a manner that effectively increases the beam divergence. The scanned beam is homogenized by a beam homogenizer and a spatial light modulator is arranged to receive the homogenized scanned light beam and spatially modulate the beam in accordance with a component of an image to be displayed. Projection optics are projecting the homogenized scanned light beam onto a screen. The scanning provides that the homogenized scanned light beam at the screen has a coherence radius less than the original coherence radius of the beam. The reduced coherence radius contributes to minimizing speckle contrast in the image displayed on the screen.

Abstract: A laser projector including a cooling system having an internal wall dividing the housing into a first compartment containing the optical components and a second compartment containing the electrical components, wherein the internal wall has a first face receiving the optical components and a second face receiving the electrical components thermally isolated from the first face. The internal wall includes a cooling channel and a fan directs air through the channel to maintain the optical components below a maximum operating temperature. The internal wall in one disclosed embodiment includes two parallel wall members each having a plurality of parallel channels, a thermoelectric cooling element located on the wall adjacent the first compartment, a sensor is located in the first compartment and a control maintains a temperature below ambient in the first chamber.

Abstract: The present invention relates to a rear projection type image display device comprising projection lenses (2, 3) for projecting an image displayed on an image display element onto a transmission type screen (6) on a larger scale, an optical path turn-back mirror (7) for turning back halfway a light beam projected from the projection lenses, and a drive circuit for displaying an image on the image display element, that are fixedly housed within a housing (5). When a diagonal size of the transmission type screen (6), the depth of the housing (5), and the length from a lower end of the screen (6) to a lower end of the housing (5), are assumed to be SS (inch), D (inch), and L (inch), respectively, the following conditions are satisfied: SS >40, D?SS/3.0, L?SS/10.9.

Abstract: A light source arrangement has a first light source, a second light source and a dichroic mirror. The dichroic mirror is disposed with the first and second light sources and configured to reflect a predetermined portion of the light emitted from the first light source and to transmit the remaining portion. The dichroic mirror is also configured to reflect light emitted from the second light source so that it propagates in the same direction as the remaining portion of the light from the first light source which is transmitted through the dichroic mirror.

Abstract: A liquid crystal projector for full-color image projection has three LCD panels as light valve device, associated with respectively primary colors, for displaying an image in a color-separated manner. An ultra high pressure mercury lamp illuminates the LCD panels through three illuminating light paths associated with respectively the primary colors. A combining prism combines image light of the primary colors from the three LCD panels, to obtain full-color image light. A laser diode emanates auxiliary illuminating light of a red color among the primary colors according to laser emission, to compensate for shortage in light intensity in the red color. A ferroelectric shaking or vibrating device vibrates the laser diode, to keep visual noise inconspicuous in the auxiliary illuminating light.

Abstract: An optical device includes a first optical element including an incidence plane on which light from an object is incident, the incidence plane being in contact with the surrounding environment; a main body having an inside and housing the first optical element such that the incidence plane and the inside of the main body are hermetically sealed; a second optical element provided in the main body, the second optical element receiving light from the first optical element; and an absorbent member provided in the main body. In the optical device, the absorbent member has a moisture absorptive capacity corresponding to at least an amount of water retention inside the main body.

Abstract: A mirror having low density, low CTE, high thermal conductivity, high elastic modulus, and a reflective, polishable surface. The instant mirror features a silicon-based metal coating as the reflective surface, and a composite body as a support or substrate for the reflecting surface. The composite body features carbon fibers reinforcing a matrix containing silicon metal and optionally some silicon carbide. The metal coating can be elemental silicon metal, possibly in amorphous form, and can be applied by a vapor deposition process such as chemical vapor deposition (e.g., plasma enhanced CVD) or physical vapor deposition such as evaporation or electron beam PVD.

Abstract: An apparatus for deflecting a laser beam includes a deflecting mirror disposed in a holder, a lever, a rotatable coupler, and a drive member. The mirror is pivotable about a first pivot axis lying on a surface of the mirror, and the holder is rotatable about a second pivot axis oriented substantially perpendicular to the first pivot axis to cause the mirror to rotate about the second pivot axis. The lever is coupled to the mirror along a first lever axis parallel to and separated from the first pivot axis. The rotatable coupler is coupled to the lever along a second lever axis parallel to and separated from the first pivot axis, the coupler is rotatable about the second pivot axis, and the rotatable coupler and the holder are longitudinally translatable relative to each other along the second pivot axis. The drive member is coupled to the holder, and the drive member is longitudinally translatable along the second pivot axis to cause the mirror to rotate about the first pivot axis.

Abstract: A vehicular lamp has light source units connected in parallel, an output controlling switch operable to intermittently carry an electric current by repeating on and off, an output coil operable to output electric power according to current flowing into said output controlling switch in synchronization when said output switch switches, a selection controlling unit operable to select at least one said light source unit in synchronization when said output controlling switch switches and cause said at least one selected light source to receive the power output from said output coil, and a malfunction detecting unit operable to detect malfunction of each of said light source units, wherein said selection controlling unit selects at least one said light source unit among said light source units from which malfunction is not detected when said malfunction detecting unit detects malfunction of either of said light source units.

Abstract: A swimming pool light assembly for connecting a light to a side wall of a pool where a pool light niche is not provided, said assembly comprises an interchangeable light, a watertight connector comprising a first end and a second end operable to deliver at least one of power and control signals to said light through said first end, and a cable with a first end connected to said connector for providing at least one of power from a power source and a control signal from a controller to said light, wherein said light is operable for connecting and disconnecting from said watertight connector while both said connector and said light are submerged in water.

Abstract: A floatable, illuminable decorative device, usually in the shape of a flower, is made from a light transparent or translucent flexible thermoplastic material. A light emitting diode powered by a micro cell is sealed within the flower. A water activated switch is mounted in the seal so as to activate the light emitting diode when the device is floated on water.

Abstract: A track assembly is adapted to be coupled beneath eaves of a building. The track assembly has forward and return. A slot is provided in the lower surface of the forward track. Spaced balls are provided in each track. A primary cord is in a continuous loop extending through the forward and return tracks. A plurality of secondary members is adapted to depend from the primary cord through the slot to beneath the track assembly. A spool is provided in proximity to the track assembly and primary cord. A motor rotates the spool and moves the primary cord in a first direction to position the secondary members in the forward track in an operative orientation and in a secondary direction to position the secondary members in an inoperative orientation.

Abstract: A railing with light emitting diodes includes a rod, a base unit secured to the bottom, a lid secured to the top, an illuminating device mounted in the rod, and a controller. The illuminating device is provided with a plurality of lighting units to illuminate as a warning light for passerby to avoid from collision and as a decorative light to beautify the environment.

Abstract: A safety candle comprising: a tea light candle holder and at least one tea light candle insert.

Abstract: An airport light system is disclosed, which includes an airport guidance sign circuit, and an airport light installation coupled to the airport guidance sign circuit that includes a guidance sign component activated in an ON position of the airport guidance sign circuit and deactivated in an OFF position of the airport guidance sign circuit, a runway guard light component, a rechargeable battery coupled to the runway guard light, a battery charger for recharging the rechargeable battery, and the runway guard light component activated a) by the airport guidance sign circuit in the ON position of the airport guidance sign circuit, and b) by the rechargeable battery in the OFF position of the airport guidance sign circuit.

Abstract: A method and system are described for illuminating a document, such as passports, identity documents or other types of documents, using illumination means under control of a processor to effectively control the angle and direction of light on such documents to expose optically variable devices such as holograms, intaglio printing and optically variable coating and inks contained in or on the documents and the material laminating the documents.

Abstract: A light-emitting-diode (LED) illuminating device includes an object having a plurality of holes formed thereon, and at least one LED lamp bank consisting of a plurality of LED lamps serially connected together using an electric wire. The LED lamps are separately inserted in the holes on the object to show geometrical shapes or patterns, and/or word or words on the object, so that the object may be used as an illuminating signboard. Each of the LED lamps includes an LED and a protective member enclosing a rear part of the LED, so that the LED is waterproof and not subjected to breaking easily. The LED-illuminating device is easy to assemble, consumes less power, and has longer usable life and reduced cost.

Abstract: An illuminated novelty device includes a plurality of light emitting diodes (LEDs). An elongated light bar can be mounted to each of the LEDs. The light bars have a light receiving end and a light emitting end and are mounted to respective LEDs at the light receiving end. The light bars are formed from a light transmissive material. Conductors extend between and connect the LEDs. The LEDs are spaced from one another along the length of the conductors. The LEDs, the elongated light bars and the conductors define an LED assembly. A power source is operably connected to the LED assembly and a switch is operably connected between the power source and the LED assembly. The power source and switch are maintained in a housing. A light transmissive sheath has the LED assembly fitted, at least in part, within it. The sheath has a first end mounted to the housing and a second free end.

Abstract: Certain preferred embodiments of the present invention provide an improved light raising and lowering apparatus and method for a basketball goal. In some improved embodiments, an extension arm with a light attaches to an adjustment mechanism and further attaches pivotally to a basketball goal support structure, where the light moves upward when the adjustment mechanism pulls on the extension arm. As a preferred feature, the extension arm rotates to a raised position where the extension arm may be secured without requiring manual adjustments. As another preferred feature, the light raising and lowering apparatus may be attached to a previously assembled basketball goal.

Abstract: A retrofit HID lamp assembly, for use in a non-HID lighting receptacle, to provide HID illumination. The lamp assembly includes (i) a housing of a non-HID lamp assembly, (ii) a base terminal structure coupled with the housing, and compatible with such non-HID lighting receptacle, (iii) a ballast unit in the interior of the housing, (iv) a reflector overlying the ballast unit in the interior of the housing, (v) an HID lamp mounted in the interior of the housing so that light generated by the HID lamp is reflected by the reflector, with the HID lamp being electrically coupled with the ballast unit, and (vi) a lens coupled with the housing. A corresponding fabrication methodology is described. The retrofit HID lamp assembly may be used to retrofit existing lighting installations, such as PAR receptacles in exterior aircraft lighting systems, to cost-efficiently improve the illumination provided by such systems.

Abstract: An underwater pool light comprises: a housing; a lens sealingly fixed to the housing; a light source located within the housing; and mounting means for mounting the housing to a niche within or on a wall of a pool. The housing includes an integral connector for external connection to an electrical supply cable, and the pool light includes electrical connection means within the housing connecting the light source to the integral connector.

Abstract: A light assembly for a vehicle is provided with a light source capable of emitting rays including a visible ray and an infrared ray, a main reflector disposed so as to reflect the rays emitted by the light source forward, and a filter being reflective of the infrared ray and transparent to the visible ray.

Abstract: A full cutoff luminaire having a housing with an open bottom, a vertically mounted lamp centrally located within the housing, a radial reflector surrounding a portion of the lamp and a downwardly extending optic lens having an open top enshrouding a lower portion of the lamp wherein light emitted from the luminaire does not exceed 90° above nadir.

Abstract: The invention envisages a light-generating apparatus that provides effective cooling of the reflector, the apparatus comprising a reflector and a device for improving the dissipation of heat from the reflector.

Abstract: A decorative lamp that includes a base and a poseable stem that extends from the base. A spring is connected with respect to an end of the poseable stem opposite the base and a wire is routed through the poseable stem and through the spring and into a socket positioned at an end of the spring opposite the poseable stem. A vibrator may be positioned on the decorative lamp to impart a motion to the socket.

Abstract: A signaling system for mounting to an exterior surface of an emergency vehicle is provided. The signaling system includes a light bar and a pair of mounting feet. The light bar can include a plurality of signaling devices supported on and distributed along a base member and enclosed by a cover. The light bar can be secured to the mounting feet via a plurality of fasteners. The mounting feet can be connected to the emergency vehicle via roof straps. Each mounting foot can include a base, which can have a support portion, a contoured portion, and a pair of compartments; a pair of seals associated with each compartment; a pair of covers, which can be translucent, removably mounted to the base to enclose the compartments; and a roof strap secured to the base. Each compartment can house a signaling device, such as a lamp assembly.