US3603013A - Electric illumination devices - Google Patents

Electric illumination devices Download PDF

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Publication number
US3603013A
US3603013A US795565*A US3603013DA US3603013A US 3603013 A US3603013 A US 3603013A US 3603013D A US3603013D A US 3603013DA US 3603013 A US3603013 A US 3603013A
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United States
Prior art keywords
light source
light
flexible material
screen
fuel means
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US795565*A
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English (en)
Inventor
Frederick Brydone Reed
Ernest Eugene Gardiner
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RADIATION SUNHOUSE Ltd
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RADIATION SUNHOUSE Ltd
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Publication of US3603013A publication Critical patent/US3603013A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/002—Stoves
    • F24C7/004—Stoves simulating flames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F21S10/04—Lighting devices or systems producing a varying lighting effect simulating flames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Definitions

  • An electric illumination device which includes a translucent viewing screen, imitation fuel means, suspended fleitible material disposed inwards of the viewing screen, a light source disposed inwards of the flexible material, and means for causing airflow for moving the flexible material to vary the lighting effect imparted by the device, said flexible material having upper portions which when the device is in operation are caused by the airflow to move in relation to light from the light source to cause a random flickering effect visible as a flame effect through the viewing screen, and said flexible material having lower portions which when the device is in operation are caused by the airflow to move in relation to light from the light source to cause a random flickering effect illuminating from within the device the imitation fuel means.
  • This invention relates to electric illumination devices and an object of the invention is to provide simple and effective means for producing a simulated flame effect combined with a simulated fuel effect.
  • an electric illumination device comprises a translucent viewing screen; imitation solid fuel means; suspended flexible material disposed inwards of the viewing screen; a light source disposed inwards of the flexible material; and means for causing air flow for moving the flexible material to vary the lighting effect imparted by the device; the arrangement being such that, when the device is in operation, the movement of upper portions of the flexible material in relation to light from the light source causes a random flickering effect visible, as a flame effect, through the viewing screen, and the movement of lower portions of the flexible material in relation to light from the light source causes a random flickering effect illuminating, from within the device, the imitation fuel means.
  • the suspended flexible material may be constituted by a row of flexible strips.
  • a translucent inner screen which extends upwards for most of the height of the suspended flexible material and is illuminated by light from the light source, said translucent inner screen forming a backing panel spaced behind the upper portions of the suspended flexible material, substantially all the light reaching the viewing screen from the light source, but substantially none of the light reaching the imitation solid fuel means from the light source, being diffused by this translucent inner screen.
  • the said translucent inner screen may be omitted.
  • the line in plan of the flexible material is substantially rectilinear and the line in plan of the viewing screen is of a U-shaped formation.
  • the line in plan both of the flexible material and the viewing screen is basically of a U-shaped formation, and in a further embodiment the line in plan both of the flexible material and of the viewing screen is circular in form.
  • FIG. 1 of the accompanying drawings shows, partly in elevation and partly in vertical section, a front-view of an electric illumination device constructed in accordance with the present invention, said illumination device being illustrated by way of example. 7
  • FIG. 2 is a side elevation of the illumination device shown in FIG. 1.
  • FIG. 3 is a vertical section on the line IIIlII, FIG. 1.
  • FIG. 4 is a vertical section through another embodiment of the invention.
  • FIGS. 5 and 6 are vertical sections through two further embodiments of the invention.
  • FIG. 7 is on a smaller scale than FIGS. 1 to 6 and is an elevation of another embodiment of the invention.
  • FIGS. 8 and 9 are sectional views on the lines VIII-VIII, FIG. 7 and lX-IX, FIG. 7, respectively.
  • FIG. 10 is a horizontal sectional view through a further embodiment of the invention, and is on the same scale as FIGS. 7 to 9.
  • FIG. 1 1 shows another embodiment of the invention.
  • an electric illumination device comprises a casing 1 having upper and lower portions, the front and sides of the upper portion of said casing being formed by a translucent front viewing screen 2 of a U- shaped form in horizontal cross section, and the front and sides of the lower portion of the casing 1 being formed by imitation solid fuel means 3 constituted by a hollow molding disposed below the screen 2 and having opaque portions, representing logs, or parts of logs, interspersed with translucent portions. (If desired, the hollow molding may be formed to represent coal, instead of logs.)
  • the casing 1 is closed at the rear by a metal wall 4 carrying a rearwardly protruding lamp housing 5.
  • the viewing screen 2 has an integral transparent lower extension 2a extending to the base of the device, the space between the screen 2, vwith its transparent extension 2a, and the rear wall 4, constituting a substantially airtight compartment C.
  • each strip 6 is of a highly reflective translucent material, for example satin nylon material.
  • the upper tips of the strips may be blackened, asv shown.
  • a red or orange light source formed by a pair of clear glass red or orange electric light bulbs 9 the said bulbs 9 being horizontally mounted facing each other and being arranged to illuminate the strips 6 through a translucent screen or sheet 10 in the opening in the back wall 4.
  • Means are provided for causing airflow inside the compartment C of the casing 1 to move the flexible strips 6 to varythe lighting effect imparted by the device, and for this purpose there is disposed, inside a bottom portion of the compartment C, an impeller 11 driven by an electric motor 12, said impeller 11 being situated beneath the bottom of the strips 6 and being in combination with a vortex former 13.
  • the impeller 11 ex tends from one side of the compartment C to the other, and when in operation causes a substantially even flow of air over the row of strips for the entire length of the row, whereby all the strips move to substantially the same extent.
  • the arrangement is such that when the device is in operation, that is, when the lamp bulbs 9 are alight and the impeller 11 is in operation, the strips 6 are given a fluttering motion by the air blown upwards by the said impeller, and some of the red or orange light from the bulbs 9 passes to upper portions 6a of the strips 6, the movement of said portions 6a in relation to said light causing a random flickering effect visible, as a flame effect, through the viewing screen 2, while some of the red or orange light from bulbs 9 passes to lower portions 6b of the strips 6, the movement of these lower portions 6b in relation to this light causing a random flickering effect illuminating, from within the device, the imitation fuel means 3 and imparting a realistic appearance to thetranslucent portions of said fuel means 3.
  • the translucent screen or sheet 10 can be omitted.
  • the device has, as in the case of that shown in FIGS. 1 to 3, a U-shaped translucent viewing screen 2 with a transparent lower extension 2a, imitation solid fuel means 3, suspended flexible strips 6, of highly reflective translucent material, disposed inwards of the screen 2, red or orange lamp means 9 disposed inwards of the strips 6, and impeller means 12 for blowing air over the strips 6, but there is disposed behind the strips 6, between the latter and the lamp means 9, a vertical translucent inner screen or sheet 14 which extends upwards for most of the height of the suspended flexible strips 6 and is illuminated by light from the lamp means 9, said inner screen 14 forming a backing panel spaced behind the upper portions of the strips 6, and terminating at its lower edge at a level spaced above that of the bottom of the said strips.
  • the window is omitted in this particular embodiment.
  • the movement of the upper portions 6a of the airblown strips 6 in relation to light from the lightsource results in a flame effect being visible through the viewing screen 2
  • the movement of the lower portion 6b of the strips 6 in relation to light from the light source results in a random flickeringeffect illuminating, from within the device, theimitation fuel means 3 whereby a realistic appearance is imparted to the translucent portions the imitation fuel means, as in the embodiment shown in FIGS. 1 to 3.
  • substantially all the light reaching the viewing screen 2 from the light source 9, but substantially none of the light reaching the imitation fuel means 3 from said light source 9, is diffused by the translucent inner screen or sheet 14.
  • the flexible strips 6 in the arrangement described with reference to FIG. 4 may, instead of being translucent, be opaque strips.
  • FIG. 5 is of the same construction as that shown in FIGS. 1 to 3, except that there is added, within the front portion (shown at 3a) of the imitation fuel means 3, a horizontal reflector spaced beneath the top of said front portion 311, said reflector increasing the movement and intensity of the light effect visible through the upper part of the front portion 3a of the imitation fuel means.
  • FIG. 6 is .likewise of the same construction as the embodiment shown in FIGS. 1 to 3, except that in this case thereis added, within the front portion 3a of the imitation fuel means, an additional red or orange electric light source 16 which subdues the movement of, and increases the intensity of, the light effect visible through the lower part of the said front portion 3a.
  • a horizontal opaque light baffle 17, which may be of aluminum, is spaced immediately above the said additional light source 16, whereby to minimize the effect of the light source 16 on the movement of the light visi ble through the upper part of the front portion 3a of the imitation fuel means.
  • the light baffle 17 has its upper surface finished to act as a reflector surface.
  • the above embodiments may be modified, if desired, by making the viewing screen straight, or slightly bowed, instead of U-shaped.
  • FIGS. 7 to 9 show an embodiment in which a translucent viewing screen 2', the line of a row of suspended flexible strips 6, a molding 3' representing imitation fuel means, and an inner translucent light-diffusing screen 14, are all, in plan, of a circular formation.
  • a red or orange light source 9' is disposed inside a central space 19 defined by the circular inner screen 14'.
  • An impeller 18 is provided for producing airflow for imparting a fluttering movement to the strips 6, and when the device is in operation some of the light from the light source 9' passes to the upper portions 6a of the strips 6 whereby a flickering flame effect is visible through the viewing screen 2, and some of the light from said source passes to the lower portions 6b of the strips whereby the imitation fuel means 3 is illuminated by a random flickering effect. That part of the light from the source 9 which passes to the said upper portions 6a of the strips passes through the inner translucent screen 14', while that part of the light from said source which passes to the lower portions 6b of the strips passes undiffused through an annular airgap 14'a below the screen 14'.
  • the flame effect and the fuel effect are visible from any side of this 'particular embodiment, and the said embodiment is designed to simulate a circular fireplace.
  • the imitation fuel 3 is surrounded at the bottom by a circular wall 22, and the double-walled cylindrical structure formed by the screens 2', 14',
  • I is surmounted by a coned hood 20 leading to a simulated (but sealed) central cylindrical chimney.
  • the inner screen 14 is supported by'brackets such as those indicated at 21; and when the device is in operation air from the impeller flows, as shown by the arrows, down through the space 19, then through the gap l4a, then up past the strips '6, and then back to the impeller for recirculation.
  • FIG. 10 shows, in horizontal cross section an embodiment in which a translucent viewing screen 2", the line of a row of suspended flexible strips 6, a molding 3" representing imitation fuel means, and an inner translucent screen 14" are all, in plan, of a U-shaped formation.
  • a red or orange light source 9" is disposed inwards of the inner screen 14" and when the device is in operation, with the strips 6 caused to'flutter by air from an impeller (not shown), some of the light from the light source 9" passes through the inner screen 14" to upper portions of the strips 6 whereby a flickering flame effect is visible through the viewing screen 2", and some of the light from said source 9” passes undiffused beneath the screen 14 5 whereby the imitation fuel 3" is illuminated by a random flickering effect, the said flame effect and fuel effect being visible from the front and two opposite sides of the device.
  • the device is provided with a base 23.
  • the viewing screen 2,2, or 2 may have a light-diffusing surface having a multiplicity of closely adjacent thin horizontal or near horizontal broken or unbroken lines extending from one side of the screen to the other and formed in a manner described in the specification of British Pat. No. 978,364.
  • the said screen 14 (which may, if desired, be red or orange colored) may have a light-diffusing surface having a multiplicity of closely adjacent thin substantially horizontal lines formed in a manner described in said specification No. 978,364 and a multiplicity of closely adjacent thin substantially vertical lines to produce a crisscross pattern on the said screen.
  • the flexible strips may be caused to move by air drawn from outside, but it is preferred that the strips be moved not by air from outside but by air circulating in a substantially airtight enclosure, in order, as hereinbefore explained, to avoid or minimize soiling of the strips by airborne dust.
  • the air-moving arrangement is such that there is an even flow of air over the strips for the entire length of the row, whereby all the strips move to substantially the same extent, as in the case of the embodiment shown in FIGS. 1 to 3. If desired the arrangement may be such that the air flows downwards, instead of upwards, over the flexible strips.
  • the suspended flexible material may, instead of being in the form of separately suspended flexible strips, if desired be in the form of a flexible sheet which has translucent portions, and/or is slit or cut away, the arrangement being such that when the device is in operation the light from the light source results in a flame effect visible through the viewing screen, and the movement of lower portions of the sheet in relation to light from the light source results in the imitation fuel being illu' minated by a random flickering effect.
  • FIG. 1 l shows a device which is of the same construction as that illustrated in FIGS.
  • a suspended flexible sheet 24 which is slit or cut away to provide a plurality of strips in the form of depending flexible tongues 25.
  • the top edge of the sheet 24 is anchored to the bracket means 7, and the bottom ends of the tongues 25 are anchored to the bracket means 8.
  • the device may, if required, form part of an electric heater.
  • An electric illumination device comprising a translucent viewing screen; imitation fuel means at the base of and below said viewing screen, said imitation fuel means having translucent portions; suspended strips of flexible material disposed inwards of the viewing screen and imitation fuel means; a light source disposed behind said screen inwards of the flexible material, whereby said flexible material is interposed between said light source, on the one hand, and said viewing screen and said imitation fuel means on the other hand; and means for causing airflow for moving the flexible material to vary the lighting efiect imparted by the device; said flexible material having upper portions between said light source and said screen which when the device is in operation are caused by the airflow to move in relation to light from the light source to cause a random flickering effect visible, as a flame effect, through the viewing screen; and said flexible material having lower portions between said light source and said imitation fuel means which when the device is in operation are caused by the airflow to move in relation to light from the light source also to cause a random flickering effect illuminating, from behind, said translucent portions of imitation fuel means.
  • An electric illumination device wherein the edge of the flexible material in plan view is substantially rectilinear.
  • An electric illumination device according to claim 1, wherein the edge of the flexible material in plan view is substantially rectilinear.
  • An electric illumination device according to claim 1, wherein a translucent inner screen is disposed intermediate the light source and the suspended flexible material and extends upwards for most of the height of the suspended flexible material and is illuminated by light from the light source, said translucent inner screen forming a backing panel spaced behind the upper portions of the suspended flexible material, substantially all the light reaching the viewing screen from the light source being diffused by said translucent inner screen, but substantially none of the light reaching the imitation fuel means from the light source being diffused by said translucent inner screen.
  • An electric illumination device wherein there is disposed, beneath a top portion of the imitation fuel means, a reflector which increases the movement and intensity of light visible through said imitation fuel means.
  • edge of the flexible material in plan view is substantially rectilinear, and the line in plan edge of the viewing screen is basically of a U-shaped formation.
  • An electric illumination device comprising a translucent viewing screen; imitation fuel means at the base of and below said viewing screen, said imitation fuel means having translucent portions; suspended flexible strips disposed behind said screen inwards of the viewing screen and imitation fuel means; a light source disposed inwards of the flexible strips, whereby said flexible strips are interposed between said light source, on the one hand, and said viewing screen and said imitation fuel means on the other hand; a translucent sheet between said light source and the upper portions of said strips to transmit light passing through said screen and means for causing airflow for moving said flexible strips to vary the lighting effect imparted by the device; said flexible strips having upper portions between said light source and said screen which when the device is in operation are caused by the airflow to move in relation to light from the light source to cause a random flickering effect visible, as a flame effect, through the viewing screen; and said flexible strips having lower portions between said light source and said imitation fuel means which when the device is in operation are caused by the airflow to move in portions of imitation fuel means.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US795565*A 1968-02-06 1969-01-31 Electric illumination devices Expired - Lifetime US3603013A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB577568 1968-02-06
GB9981/68A GB1186655A (en) 1968-02-06 1968-02-06 Electric Illumination Devices
GB700168 1968-02-13
GB817168 1968-02-20

Publications (1)

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US3603013A true US3603013A (en) 1971-09-07

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US795565*A Expired - Lifetime US3603013A (en) 1968-02-06 1969-01-31 Electric illumination devices

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US (1) US3603013A (de)
AT (1) AT289952B (de)
BE (1) BE728041A (de)
DE (1) DE1904280B2 (de)
GB (1) GB1186655A (de)
NL (1) NL6901174A (de)

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Also Published As

Publication number Publication date
DE1904280C3 (de) 1973-11-15
GB1186655A (en) 1970-04-02
NL6901174A (de) 1969-08-08
DE1904280A1 (de) 1969-09-18
DE1904280B2 (de) 1973-04-26
BE728041A (de) 1969-07-16
AT289952B (de) 1971-05-10

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