The present invention is related to a flame simulating assembly.
Various types of flame simulating assemblies are known. One type of known flame simulating assembly typically includes a simulated fuel bed, one or more light sources, a screen disposed behind the simulated fuel bed for diffusing and transmitting light from the light source, and a flicker element for causing light from the light source to fluctuate, or flicker, to simulate flames. Images of flames are provided by fluctuating light from the light source which is transmitted through the screen. Typically, the known electric flame simulating assembly also includes a flame effect element which configures fluctuating light from the light source to form the images of flames which are transmitted through the screen. Such a flame simulating assembly is disclosed in U.S. Pat. No. 5,642,580 (Hess et al.).
Usually, the flame simulating assembly also includes an electric heat source and a fan, for heating the room in which the flame simulating assembly is located. The electric heat source can be, for example, one or more electric heating elements, and the fan blows heated air out of the flame simulating assembly and into the room.
The typical flame simulating assembly is sold with a trim package according to the purchaser's preference. For example, most flame simulating assemblies are sold with a trim package which, upon assembly, resembles a natural fireplace hearth and mantle and associated woodwork. However, flame simulating assemblies positioned inside simulated stoves (e.g., cabinets which resemble wood-burning stoves) are also popular. For the purposes hereof, it will be understood that a flame simulating assembly includes a device for simulating flames, regardless of whether, for example, the device is installed in a simulated stove or fireplace.
In another type of flame simulating assembly, strips of colored cloth ribbons are suspended behind a screen. The ribbons are moved by a forced stream of air from a fan, and illuminated to simulate flames, when viewed through the screen. Such a flame simulating assembly is disclosed in U.S. Pat. No. 4,965,707 (Butterfield).
In a third type of known flame simulating assembly, a series of pictorial images of flames are shown on a display panel adapted to show such images. For example, in GB 2 242 737 (Shute), an artificial fire unit is disclosed which includes a television set and a video recorder for playing recordings of fires on the television set. The artificial fire unit is positioned in a cabinet so that it appears to be “a conventional domestic fire unit” (p. 2, at lines 19-20).
Other relevant known prior art includes GB 2 288 052 (Stranney), and U.S. patent application Ser. No. 10/120,889 (published as no. U.S. 2003/0201957) (Mix et al.). In each of these, an alternative to the then known flame simulating assemblies is disclosed in which pictorial images of flames are provided.
For example, in GB 2 288 052, videotaped images of flames are projected onto one or more opaque, or semi-opaque, screens to simulate a fire, and appropriate audio effects are also provided.
In Mix et al., a display is disclosed which is driven by a controller, and/or driven by other peripheral components. The display is described as being a “flat-panel display”, and includes an LCD display or a plasma screen display.
In summary, although known flame simulating assemblies can provide a realistic simulation of a natural wood or coal fire in a real fireplace or stove, there are a number of aspects of known flame simulating assemblies which are not as realistic as might be desired, or which otherwise need improvement. For example, an entire flat panel display which is a LCD panel would be relatively expensive. Also, the overall simulations provided by the known flame simulating assemblies in which pictorial images of flames are displayed tend to be somewhat lacking in realism. In particular, because the pictures of flames are presented on a flat panel, and the three-dimensional aspects (if any) of the pictures are generally relied upon to provide an illusion of depth, the pictorial images provided in the third type of prior art flame simulating assembly tend to appear somewhat flat (i.e., lacking in depth), and thus somewhat ineffective.
There is therefore a need for an improved flame simulating assembly to overcome at least one of the disadvantages of the prior art.
In its broad aspect, the invention provides a flame simulating assembly including a simulated fuel bed, a screen having a front surface disposed proximal to the simulated fuel bed and a back surface positioned opposite to the front surface, and a flame picture projector. The flame picture projector is for creating a plurality of motion pictures of flames from recorded motion pictures stored on a storage medium accessible thereby, and projecting light beams carrying the motion pictures of flames to the back surface of the screen. The screen is adapted to display the motion pictures of flames at its front surface, and the front surface is partially reflective, for providing a reflected image of the simulated fuel bed appearing to be disposed at least partially behind the motion pictures of flames displayed at the front surface. The result is that the motion pictures of flames appear to be substantially centrally positioned relative to the simulated fuel bed.
In another aspect, the back surface of the screen is non-planar so that the motion pictures of flames are displayed in three dimensions at the front surface of the screen.
In yet another aspect, the simulated fuel bed includes one or more simulated fuel elements and a simulated ember bed, the simulated ember bed being positioned below the simulated fuel elements. The simulated ember bed has an exterior surface shaped and colored to simulate embers and an opposed interior surface. The simulated ember bed includes a plurality of light-transmitting portions for resembling glowing embers upon light being transmitted therethrough.
In another of its aspects, the simulated ember bed is positioned so that the light beams from the flame picture projector are transmitted through the light-transmitting portions to simulate glowing embers.
In another aspect, the flame simulating assembly additionally includes an ember bed mirror positioned to direct light beams from the flame picture projector substantially towards the light-transmitting portions of the simulated ember bed.
In yet another of its aspects, the flame simulating assembly additionally includes one or more ember bed light sources. The light-transmitting portions of the simulated ember bed are positioned in a path of light from the ember bed light sources so that light is transmitted through the light-transmitting portions to simulate glowing embers.
In yet another aspect, the screen includes an upper portion which is at least partially transparent and which is disposed distal to the simulated fuel bed.
In another of its aspects, the flame picture projector includes a picture display device for accessing the storage medium to provide a first display of the motion pictures of flames, said first display being projectable onto the back surface of the screen.
In yet another aspect, the flame picture projector includes a projector light source positioned to direct light therefrom through the picture display device to project the motion pictures of flames onto the back surface of the screen.
In another of its aspects, the flame picture projector includes a projector light source positioned to direct light therefrom onto the first display, the light being reflected by the first display to project the motion pictures of flames onto the back surface of the screen.
In yet another aspect, the flame simulating assembly additionally includes one or more mirrors for reflecting the light beams from the flame picture projector towards the back surface of the screen.
The invention will be better understood with reference to the drawings, in which:
Reference is first made to
In the preferred embodiment, the front surface 26 is at least partially reflective (i.e., to provide specular reflection), for providing a reflected image 36 of the simulated fuel bed 22 (
Preferably, the body portion 25 of the screen 24 is made of transparent or translucent material, such as glass, acrylic or perspex. The partially reflective surface 26 preferably is created by lightly silvering the front surface of the body portion 25, at least in a lower portion 38 thereof adjacent to the simulated fuel bed 22, as will be described. It will be appreciated by those skilled in the art that the front surface 26 need not be silvered in order for it to be at least partially reflective. For example, the front surface 26 (or the body portion 25, as the case may be) could be tinted to make it dark, and thus have a small degree of reflectivity accordingly. Alternatively, or in addition to tinting, the front surface 26 could be provided with a glossy finish, so that the front surface 26 is partially reflective. However, in the preferred embodiment, the front surface 26 is made partially reflective via silvering, as will be discussed.
In one embodiment, the back surface 28 of the screen 24 is the back surface of the body portion 25 (
As compared to the front surface of a screen in a known flame simulating assembly, the front surface 26 can be made relatively more reflective in the lower portion 38, to provide a better reflected image 33 of the simulated fuel bed 22, thereby providing a better illusion of depth to an observer (not shown). In the preferred embodiment, the relatively more reflective surface is achieved by depositing relatively thicker amounts of silvering material. In order to provide motion pictures 31 that are viewable at the front surface 26 when the front surface 26 is more reflective, a relatively intense light is provided by the flame picture projector 30.
Preferably, the simulated fuel bed 22 includes one or more simulated fuel elements 40 and a simulated ember bed 41. As shown, the simulated fuel elements 40 preferably are simulated wooden logs. However, the simulated fuel elements could be formed and colored to simulate other types of combustible fuel, e.g., coal.
The simulated ember bed 41 preferably is positioned below the simulated fuel elements 40. As can be seen in
In the preferred embodiment, and as shown in
Although various methods of manufacturing and various materials could be employed, in the preferred embodiment, the simulated ember bed 41 is injection molded. The simulated ember bed 41 may be made using any other suitable method, e.g., vacuum-forming or rotation molding. Preferably, the simulated ember bed 41 is made of orange or reddish-orange translucent plastic, and the exterior surface 43 is painted to resemble ashes and embers to provide an appearance appropriate for the type of fuel which is simulated by the simulated fuel elements 40.
Preferably, the simulated ember bed 41 is positioned so that light beams from the flame picture projector 30 are transmitted through the light-transmitting portions 46 to simulate glowing embers at the exterior surface 43 of the ember bed 41. Such beams of light are schematically represented in
Alternatively, the flame simulating assembly 20 includes an ember bed light source 48 positioned below the simulated ember bed 41 (
As shown schematically in
As can be seen in
As shown in
In the preferred embodiment, the original motion pictures 59 of the natural fire 60 are modified to affect one or more preselected aspects thereof to provide an improved simulation effect, resulting in modified motion pictures 31. For example, the original motion pictures of flames 59 preferably are manipulated (i.e., edited) to result in a “loop” of motion pictures. The loop preferably is of sufficient duration that the repetition of motion pictures is generally not noticeable. As will be appreciated by those skilled in the art, care should be taken in preparing the loop to avoid a substantial deviation between the positions of flames in the motion pictures at the “end” of the loop, as compared to the positions of flames in the motion pictures at the “beginning” of the loop, as any such deviations would undermine the simulation effect sought to be achieved. In addition, differences in other elements shown in the motion pictures (i.e., at the “end”, compared to such elements at the “beginning”), such as the fuel in the natural fire 60, preferably are addressed by means of such modifications to the original motion pictures 59 as are necessary.
It will be appreciated by those skilled in the art that modification of the original motion pictures 59 is relatively easier to achieve if the original motion pictures 59 are captured using a digital camera. It will be appreciated by those skilled in the art that, where the original motion pictures 59 are captured as digital data, the modification of the original motion pictures 59 is conveniently done using a computer 66 with the appropriate software.
In addition to the creation of an endless loop, modifications to other aspects of the original motion pictures 59 may be desirable. For example, because at least a portion of the front surface 26 is preferably partially reflective (i.e., by silvering that portion, in the preferred embodiment), light from the projector light source 52 is affected by such silvering, by acquiring a somewhat bluish tinge in the motion pictures 31 displayed at the front surface 26. Also, it is preferable to increase the intensity of the light generated by the flames in the motion pictures 31 somewhat because the light from the projector light source 52 is somewhat impeded at the front surface 26, due to the relatively greater reflectivity of the front surface 26.
Once the modified motion pictures 33 are created, they are stored in (or on) the storage medium 34, which is operably connected to the picture display device 50. The storage medium 34 can be any suitable storage medium. In the preferred embodiment, the motion pictures 33 are in the form of digital data, and can be stored in any suitable means, such as a DVD, a CD-ROM, a mini-disk, or any suitable disk or semiconductor chip. However, the motion pictures 33 can be stored in any suitable format. For example, the storage medium 34 can be videotape. Preferably, the storage medium 34 is a silicon chip which is disposed in the flame picture projector 30. In addition, it will be understood that the storage medium can be located elsewhere, i.e., other than in the flame picture projector 30. Although the process of obtaining one sequence (or set) of motion pictures of flames has been described, it will be appreciated by those skilled in the art that a number of sets of motion pictures of flames could be stored in (or on) the storage medium 34.
In the preferred embodiment, the flame simulating assembly 20 includes a housing 70 comprising two sidewalls 72, a rear wall 74, a ceiling portion 76, and a front wall 78. Preferably, the housing 70 also includes a bottom wall 80. The front wall 78 preferably includes top and bottom panels 82, 84 which hold a transparent or translucent front panel 86 in place. Alternatively, the front wall 78 can exclude the panel 86, if preferred. Except for the front panel 86, the housing 70 preferably is made of sheet metal panels 87 which have been shaped and attached together in any suitable manner to form a cavity 88 in which the simulated fuel bed 22, the screen 24, and the flame picture projector 30 are positioned.
Preferably, the flame simulating assembly 20 includes the housing 70 in which the ceiling 76 is supported by the side walls 72 and the rear wall 74. The housing 70 also includes a substantially open front wall 78 disposed opposite to the rear wall 74. Also, the simulated fuel bed 22 is positioned in the housing 70 between the front wall 78 and the rear wall 74, and the screen 24 is disposed behind the simulated fuel bed 22. In the preferred embodiment, the flame picture projector 30 is also positioned in the cavity 88 formed in the housing 70.
In use, the picture display device 50 accesses the recorded pictures 33 stored in or on the storage medium 34 and provides the first display 51 of the motion pictures 31. The projector light source 52 projects light through the first display 51 towards the back surface 28 (and through the lens 54, if preferred), so that light beams from the projector light source 52 carrying the motion pictures 31 are directed towards the back surface 28. The light from the projector light source 52 is diffused at the back surface 28, and the motion pictures 31 are presented at the front surface 26.
Additional embodiments of the invention are shown in
Other devices for projecting motion pictures could be used. For example, in an alternative embodiment of the flame picture projector 130 (
Preferably, in an alternative embodiment of the flame simulating assembly 220, the back surface 228 of the screen 224 is preferably non-planar so that the motion pictures of flames appear substantially in three dimensions at the front surface 226. The screen 224 preferably also includes a diffusing member 239 disposed behind a body portion 225, as shown in
Preferably, the non-planar back surface 228 (i.e., the back surface of the diffusing member 239) is curved along its length and width. The non-planar back surface 228 includes a first curvature 235 in a substantially vertical direction and a second curvature 237 in a substantially horizontal direction (
In the preferred embodiment, the diffusing member 239 is spaced apart from the body portion 225 by a predetermined distance, shown as “X” in
As shown in
As shown in
For example, in
Another alternative embodiment of the flame simulating assembly 420 is shown in
In
In
It will be understood that the configurations shown in
Additional alternative embodiments of the flame simulating assembly are shown in
Preferably, one or more simulated firebrick panels 692 are disposed on the side walls 72 and the back wall 74. The simulated firebrick panels 692 are viewable, in whole or in part, through the portion 690 of the screen 624, thereby providing a depth perspective similar to that viewable by the observer of a natural fire.
Accordingly, in one embodiment, the screen 623 does not have a partially reflective front surface 626. This embodiment could be manufactured at slightly lower cost.
However, it is preferred that the front surface 626 is at least partially reflective, to provide a reflected image (not shown in
The flame simulating assembly 720 shown in
The screen 723 diffuses the light beams from the projector light source 52 which are directed towards a back surface 728 of the screen 723. (The light beams are schematically represented by arrows AD and AE in
Preferably, one or more simulated firebrick panels 792 are disposed on the side walls 72 and the back wall 74. The simulated firebrick panels 792 are viewable, in whole or in part, above the top edge 791 of the screen 723, thereby providing a depth perspective similar to that viewable by the observer of a natural fire.
Accordingly, the screen 723 provides a depth perspective to the observer even where the front surface 726 does not include the partially reflective region. Accordingly, in one embodiment, the screen 723 does not have a partially reflective front surface 726.
The embodiments of the screens 623 and 723 which include partially reflective front surfaces are disclosed in U.S. patent application Ser. No. 10/759,143 (Hess et al.), the entire specification of which is herein incorporated by reference.
Alternatively, and as shown in
Another alternative embodiment of the flame simulating assembly 820 is shown in
In
The front reflector 994 is positioned so that at least portions of the light beams projected into a compartment 945 of the ember bed 941 are directed to a reflective surface 995 of the front reflector 994. Such light beams are reflected by the surface 995 onto the exterior surface 943 of the ember bed 941, as well as onto the simulated fuel elements 940 of the simulated fuel bed 922. For example, as shown in
It will be appreciated by those skilled in the art that the invention can take many forms, and that such forms are within the scope of the invention as claimed. Therefore, the spirit and scope of the appended claims should not be limited to the descriptions of the preferred versions contained herein.