This invention relates to a down-light and specifically to a recessed down-light fixture mounted above a light source aperture in a ceiling where part of said down-light fixture moves out from behind the ceiling to provide access to a compartment within the fixture.
A recessed light or down-light is a light fixture that is recessed into a cavity or a plenum above a ceiling within a room or space. When installed, the down-light allows light from a lamp or other light source to shine through a light source aperture in the ceiling surface, concentrating the light in a downward direction as a broad floodlight or narrow spotlight. The down-light interior is typically difficult to reach for inspection, repair, adjustment, or replacement of lamps since the ceiling forms a physical barrier between the room side and the ceiling cavity side.
Numerous ceiling frames for lighting down-lights are known in the art. Down-lights designed for recessing in a ceiling have been available for many years and designs and styles vary. Large light source apertures for down-lights are typically required in order to facilitate access for replacement of the light source and repair or replacement of any ballast, power supply, or other driver components. Larger light source apertures also facilitate inspection of electrical connections from below the ceiling without requiring special tools, difficult procedures, or complex designs. As the physical size of lamps and other light sources has significantly decreased over time, and the output and efficiency of said sources has significantly increased, there is current consumer demand in the market for recessed light fixtures with greatly reduced light source aperture sizes. To meet this demand new technologies are needed.
Regardless of trends toward smaller light sources, which have greater visual and aesthetic qualities and desirability, the light source aperture must remain of such a size as to allow for access to the above indicated components. The minimum size of the light source aperture is typically dictated by both electrical codes and national safety standards as related to the ability to conduct inspection and repair. In most down-light designs, the light source aperture is typically large enough for manual access to internal components.
A large trim ring has been a common solution to the need for accessibility for servicing and inspection of electrical components. Larger trim rings, however, often result in an appearance that is undesirable for consumers. They also add additional bulk and weight, which typically requires extra installation and finishing labor.
Another solution has been to utilize a smaller light source aperture where access to components is made possible above the ceiling, often requiring access panels located on the floor above. Remote access to power supplies and ballasts has been yet another common means of accommodating a smaller light source aperture. This approach relocates the necessary means of access to a less visible location away from the down-light, which invariably requires additional electrical wiring, construction and installation work, with increased costs as a result.
Some technological solutions that allow for a smaller light source aperture are evident in the patent literature. U.S. Pat. No. 6,402,350 discloses a down-light where a transformer housing can be pulled through an access point. A problem associated with the '350 patent lies in the difficulty of accessing the transformer housing by hand. Another problem with the '350 patent is the relative proximity of the compartment that houses the control gear to the heat producing light source, which can negatively affect the performance and lifespan of the control gear. U.S. Pat. No. 6,036,337 discloses a rotatable lamp assembly; however, the design does not, and is not, intended to improve access to components within the fixture. The side walls of the assembly of the '337 device have tracks on which the fixture can rotate. The '337 fixture only moves along the tracks in a rotational manner to alter the projection of light and provide different types of lighting.
U.S. Pat. No. 8,376,594 discloses a down-light having an assembly disposed in a housing, where a carriage moves along track and the socket can move horizontally or vertically. The '594 patent does not disclose a means for moving the electrical components into a position aligned with the light source aperture. U.S. Pat. No. 5,291,381 relates to a lighting fixture with a mounting system in which the components are not detached from the fixture (or the mount) and, therefore, cannot fall to the floor when being removed or installed and cannot be misplaced. The '381 patent does not disclose a means for repositioning components during removal from the fixture.
Thus, it is readily apparent that there is a need for a small light source aperture recessed down-light fixture that provides easy access for servicing of components behind the ceiling barriers. Also needed is a down-light fixture that can increase the lifespan of the control gear by distancing control gear components from the heat produced by the light source, but still allow all critical components to be accessible for servicing and inspection.
The present disclosure describes a down-light having components that can be separated during removal from behind a barrier such as a drywall ceiling and the like. Separating the components of the down-light during removal allows for a smaller light source aperture in the barrier. With currently available technologies, a light source aperture large enough to remove both the light source and electrical components simultaneously is typically required. The present disclosure describes a light source and electrical components that can be easily removed through the light source aperture in sequence as separate parts. This separation is accomplished through the use of a sliding shuttle adjacent to the light source. After the light source is removed, the shuttle is shifted to position the control gear assembly over the light source aperture. The control gear assembly can then be detached from the shuttle and removed through the light source aperture from behind the barrier.
It is accordingly a primary object of the present disclosure to provide a recessed down-light with a wiring compartment, also herein referred to as a control gear assembly, which can be removed through a small light source aperture from behind a barrier such as a ceiling or wall. The down-light includes an operatively connected light source and a control gear assembly that removably attaches to a mobile shuttle allowing these components to be positioned over the light source aperture. The control gear assembly detaches from the shuttle and can be pulled downward through the light source aperture; thereby enabling access to electrical components for inspection, repair, and replacements.
One advantage of the present disclosure is that it allows the control gear, including the ballast, or power supply, to sit in a location at a significant distance from the heat producing light source. The components inside the control gear enclosure are typically sensitive to heat, and prone to permanent damage or failure if operated at elevated temperatures. In situations where the control gear includes any kind of thermal protection devices, elevated temperatures often cause the fixture unintentionally turn on and off, in what is known in the industry as “nuisance tripping.”
Ceiling cavities typically have the highest temperatures within any given room, as heat rises, so the elevated ambient temperatures add to the heat that the control gear itself produces. These elevated temperatures can cause the control gear to run at close to, or even above, its maximum recommended operating temperature. Proximity to a heat source like a hot lamp may often provide extra thermal energy that can cause components to fail.
Proximity of both the lamp and the control gear to the light source aperture is a common design feature in the light fixture industry. The design of the present disclosure, however, offers a unique advantage by allowing the distance between the control gear and the light source to be increased or decreased by varying the horizontal fixture length and shuttle location behind the ceiling. The ability to adjust the distance between the control gear and the light source allows the operating temperatures of sensitive components within the control gear assembly to be optimized, while maintaining accessibility to these components. Further, the present disclosure allows for changes in distance between sensitive components and the light source without increasing the vertical height of the recessed fixture housing, which could require an undesirable reduction in ceiling height.
The control gear assembly is removably attached to the shuttle and moves with the shuttle when attached, whereas the light source is not directly attached to the shuttle other than being tethered by a wire or electrical cable. The light source is removable without moving the shuttle. Independent movement between components and the shuttle allows the light source and various electrical components to pass through the light source aperture for easy access, rather than requiring a more difficult to reach and larger access behind the barrier. Further, since the light source does not have to be accessed from behind the barrier, a large light source aperture and trim ring are not required. Rather, a smaller light source aperture with a more aesthetically designed trim ring than would normally be required can be used. A smaller light source aperture obviates the need for a larger, less aesthetically appealing trim ring while complying with all required codes and standards for accessibility of internal components and connections behind the barrier.
Various types of light sources are compatible with the down-light of the present disclosure. These light sources include a lamp, a bulb, a light emitting diode (LED), a metal halide lamp, a halogen lamp, an incandescent lamp, or a fluorescent lamp, and additional ceiling lights known in the art. In one embodiment of the present disclosure, the light source is comprised of light-emitting diodes (LEDs) and a heat sink. Alternative embodiments of the present disclosure include the use of various styles of lamp holders and light sources, such as a reflector-style lamp holder and lamps.
The trim detail of the present disclosure may, in one embodiment, have a textured surface to promote better adhesion to plaster, spackle or similar filler materials, and paint. This method of installing and finishing the trim ring, where the trim ring is covered with a finishing material to make it unnoticeable, results in a true “trimless” appearance once the fixture installation is completed.
One object of the invention is to provide a down-light built using a variety of lamps and light sources that is suitable for mounting in a multiplicity of ceiling arrangements or wall conditions.
Another object of the invention is to provide a down-light that presents a small light source aperture in a ceiling. The smaller light source light source aperture obviates the need for a large trim ring covering the light source aperture.
A further object of the invention is to provide a down-light configured so that tools are not necessarily required to access the light source, control gear assembly, or shuttle.
A further object of the invention is to provide a down-light where the control gear assembly is on a sliding shuttle allowing components to be positioned above the light source aperture, thereby providing ready access to all components for inspection, replacement or repair.
A further object of the invention is to provide a down-light where a thermal protection device is attached to a removable plate attached to the shuttle allowing it to move into view through the light source aperture for inspection, repair, or replacement.
A further object of the invention is to provide a down-light where a light source, a cable, and associated wiring are attached to and strain-relieved to a removable control gear mounting plate attached to the shuttle. This arrangement allows the control gear assembly to move into view through the light source aperture, separate from the shuttle, and pass through the light source aperture to be accessible for inspection, repair, or replacement.
A further object of the invention is to provide a down-light where the attachment point for the cable is on a removable control gear assembly.
Yet another object of the invention is to provide a down-light having a guidance system that leads to the light source aperture for the shuttle to follow. The guidance system, in one embodiment, consists of tracks along a housing configured to allow both the light source and control gear assembly to be positioned over the light source aperture for removal.
Additional objects and advantages will become apparent, and a more thorough and comprehensive understanding may be had, from the following description and claims taken in conjunction with the accompanying drawings forming a part of this specification.
The present invention and the manner in which it may be practiced is further illustrated with reference to the accompanying drawings wherein:
At the outset, it should be clearly understood that like reference numerals are intended to identify the same structural elements, portions, or surfaces consistently throughout the several drawing figures, as may be further described or explained by the entire written specification of which this detailed description is an integral part. The drawings are intended to be read together with the specification and are to be construed as a portion of the entire “written description” of this invention as required by 35 U.S.C. §112. As used in the following description, the terms “horizontal”, “vertical”, “left”, “right”, “up”, “down”, as well as adjectival and adverbial derivatives thereof (e.g., “horizontally”, “vertically”, “upwardly”, etc.) simply refer to the orientation of the illustrated structure as the particular drawing figure faces the reader. Similarly, the terms “inwardly” and “outwardly” generally refer to the orientation of a surface relative to its axis of elongation, or axis of rotation, as appropriate.
As referenced in
In
A control gear assembly 34 detachably joins within a slot 26 in the shuttle 12 (as shown in
As illustrated in
The shuttle 12 moves along a track that extends along the barrier 50. The mechanism for moving the shuttle 12 is manual in the preferred embodiment illustrated here; however, in certain embodiments the mechanism for moving the shuttle may be motorized. The shuttle 12 moves between an initial point and the light source aperture 24 in the barrier 50. The automated functionality of the mechanism for moving shuttle 12 makes it such that no tools are required to access the light source 42, control gear assembly 34, or shuttle 12.
The shuttle 12 follows the linear track between the initial point and the light source aperture 24. The linear track terminates at a stop mechanism 49 (as shown in
The stop mechanism 49 secures the shuttle 12 against the light source aperture 24, while requiring a force to be applied to allow movement of the shuttle 12 back to the initial point. In one embodiment, the stop mechanism 49 is a ball bearing plunger incorporating a body and a spring loaded ball or pin to regulate movement of the shuttle 12. In this embodiment, the ball seats into a notch in the shuttle 12, until such time as sufficient pressure is applied to enable the ball to retract into the shuttle 12, thereby allowing the shuttle 12 to move freely between the initial point and the light source aperture 24.
The light source aperture 24 is positioned in relation to the shuttle 12 to enable passage of the control gear assembly 34 and the light source 42 through the barrier 50. It is significant to note that the present invention is effective in maintaining a smaller light source aperture 24 because the control gear assembly 34 does not have to be accessed from behind the barrier 50. Rather, the control gear assembly 34 is shuttled over barrier 50 to the light source aperture 24. The smaller light source aperture 24 eliminates the need for a larger, unsightly trim ring to cover a large light source aperture in the ceiling. Yet, all required codes and standards for accessibility of internal electrical components and connections behind the barrier 50 are met with the smaller light source aperture 24.
In some embodiments, the control gear assembly 34 detachably joins within the slot 26 in the shuttle 12 and has a substantially rectangular shape, which is sized and dimensioned to fit inside the slot 26 formed in the shuttle 12. The control gear assembly 34 is held into place chiefly through a plate 36. The plate 36 is located proximate to the outer surface 16 of the shuttle 12, engaging the inner surface 18 along the longitudinal axis of the slot 26.
As referenced in
Since many modifications, variations, and changes in detail can be made to the described preferred embodiments of the invention, it is intended that all matters in the foregoing description and shown in the accompanying drawings be interpreted as illustrative and not in a limiting sense. Thus, the scope of the invention should be determined by the appended claims and their legal equivalence.
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8376594 | Park et al. | Feb 2013 | B2 |
20110194299 | Crooks | Aug 2011 | A1 |
Number | Date | Country | |
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20160201884 A1 | Jul 2016 | US |