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(12) United States Patent (10) Patent No.: US 6,616,308 B2 Jensen Et Al

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(12) United States Patent (10) Patent No.: US 6,616,308 B2 Jensen Et Al USOO6616308B2 (12) United States Patent (10) Patent No.: US 6,616,308 B2 Jensen et al. (45) Date of Patent: Sep. 9, 2003 (54) IMITATION CANDLE 5,980,064 A * 11/1999 Metroyanis ................. 362/157 6,017,139 A 1/2000 Lederer (75) Inventors: Bradford B. Jensen, Saint Joseph, MI 6,053,622 A 4/2000 Horowitz et al. ........... 362/276 (US); Roger D. Bentley, Coloma, MI 6,309,092 B1 * 10/2001 Bardeen et al. ............. 362/202 y: sm I. McCavit, Saint Joseph, FOREIGN PATENT DOCUMENTS DE 19734 345 2/1999 (73) Assignee: Jenesis International, Inc., Stevensville, MI (US) OTHER PUBLICATIONS (*) Notice: Subject to any disclaimer, the term of this Norex Enterprises, Inc., Electronic Candles and Chargers, patent is extended or adjuste d under 35 pubished on the Internet (G) http://www.norex-enterpris U.S.C. 154(b) by 0 days. es.com/candle.htm.Eternal light, Inc., Eternalights, 1999; http://www.eter nalight.com/facq.htm. (21) Appl. No.: 09/929,843 Texas Instruments; SN54HC14, SN74HC14 Hex (22) Filed: Aug. 14, 2001 Schmitt-Trigger Inverters, 1997. (65) Prior Publication Data * cited by examiner US 2003/0035291 A1 Feb. 20, 2003 Primary Examiner Alan Cariaso (51) Int. Cl." ................................................. F21V 11/00 Assistant Examiner-Ismael Negron (52) U.S. Cl. ................ 362/351; 362/392; 362/190 Attorney, Agent, or Firm-Paul W. O'Malley; Susan L. (58) Field of Search ................................. 362,351,392. Firestone 362/810, 800, 190 (57) ABSTRACT (56) References Cited An imitation candle is made from a translucent material having light transmissive properties similar to paraffin. The U.S. PATENT DOCUMENTS imitation candle is shaped to appear reduced by burning. An 2,164,378 A 7/1939 Berwick LED, or similar high intensity light Source, is set in a cavity 3,749,904. A 7/1973 Graff within the imitation candle. The LED preferably produces 3,873,880 A 3/1975 Riddell amber light to better resemble the color of candle light. The 3.890,085 A * 6/1975 Andeweg.................... 362/161 imitation candle diffuses the light emitted from the LED to 4,159,442 A * 6/1979 Komatsu ...... ... 315/156 create a warm, natural looking glow. Light emission levels 4.866,580 A * 9/1989 Blackerby ..... ... 362/191 from the LED are varied in a pseudo-random manner to 5,097,180 A * 3/1992 Ignon et al. .. ... 362/161 5,152.602 A * 10/1992 Boschetto ..... ... 362/276 Simulate the flicker of candle light. 5,863,108 A 1/1999 Lederer ...................... 362/186 5,879,076 A 3/1999 Cross 9 Claims, 4 Drawing Sheets U.S. Patent Sep. 9, 2003 Sheet 1 of 4 US 6,616,308 B2 Fig. 1 U.S. Patent Sep. 9, 2003 Sheet 3 of 4 US 6,616,308 B2 1 12 U.S. Patent Sep. 9, 2003 Sheet 4 of 4 US 6,616,308 B2 7/ LOÕigoša US 6,616,308 B2 1 2 IMITATION CANDLE Yet another object of the invention is to provide an imitation candle that uses a light-sensing device to turn the BACKGROUND TO THE INVENTION light Source off during the day. 1. Field of the Invention Still another object of the invention is to provide a flicker circuit that provides three or more distinct light levels that The present invention relates to low level luminaries and vary in a pseudo-random manner to provide a realistic more particularly to an imitation candle used primarily for variation in light output akin to a candle flame being ornamentation and establishing ambience. disturbed by gentle air currents. A realistic flicker provides 2. Description of the Problem one more Subconscious cue that the candle is real. Many people find candle light pleasant. The flickering of 1O light and movement of Shadows acroSS a floor or on a nearby Yet another object of the invention is to provide a lumi wall can be almost hypnotically Soothing. As a result, nary that gives a very realistic representation of a broad, Self candles have remained popular for generations since the Supporting candle that has burned down to the point where invention of more practical electrical lighting, especially for the flame is not visible. decorative and mood Setting purposes. This has remained So 15 These and other objects are achieved as is now described. notwithstanding the hazard posed by open flames and the The imitation candle of the present invention hides the light consequent danger of household fires. Few people consider Source within the body of the luminary which gives the body it safe to leave a lit candle unattended. a glow in much the same way that a real wax candle glows Consequently, numerous manufacturers have attempted to when illuminated by a depressed flame. There is no shaped meet a demand for a candle like luminary using electrical imitation flame to betray the fact that the candle is not real. illumination. There are many imitation candles available The light Source is preferably a light emitting diode enclosed that use incandescent lamps or LEDs as a light Source. within the translucent material forming the body of the While these address people's concern with the open flame, luminary. The translucent material Surrounds the light emit most try to implement the appearance of a realistic flame ting diode on the Sides and top at least to an extent necessary using a Specially shaped bulb or lens that is exposed to view. 25 to make direct viewing of the light emitting diode inconve Typically, the bulb or lens sits on top of a thin cylindrical nient. The light emitting diode is positioned near the top of sleeve, which is shaped and colored to resemble a candle. the body so that the top is brighter than the lower parts of the The results are typically disappointing, especially when candlestick, which again Simulates the appearance of a real these devices are not illuminated. The visible, flame shaped candle. Placing the light emitting diode near the top also artificial light Source makes the imitation candle as a whole creates a hot Spot of light that can be seen in the translucent appear artificial. The result can look more like a caricature material when viewed from above. Recessing the top within of a candle than a real candle. The color of incandescent the Side walls presents the appearance of a candle that has light can leave Something to be desired in many candles as already been burning for some length of time. The body of well. the imitation candle can be made from real wax to further The use of frosted glass cylinders around incandescent 35 enhance the imitation candle's realism. Alternatively, light Sources to diffuse light is known. Such products are frosted glass or plastic materials may be used. pleasant and popular. However, the light produced by an The invention provides an imitation candle having a body incandescent Source can be quite broad, and the top of the made from a translucent material having optically transmis lamp must be open to allow heat to escape. Another product, Sive properties similar to candle paraffin. In a preferred Sold by Eternalight, Inc. of Cortaro, Ariz., provides a plu 40 embodiment the body of the imitation candle has a relatively rality of LEDs arranged on a base inside a frosted glass large base or circumference relative to its height and is Self cylinder. A computer is used to control current Supplied the Supporting. The candle body is shaped to Simulate a candle LEDs to change the color and intensity of the light emitted which has partially burned down, for example by forming a to give an artificial flame shape and motion and to vary the depression into an upper Surface of a cylindrical candle intensity of the artificial flame. A similar product is sold by 45 body. A light emitting body, or Similar Small, high intensity Norex Enterprises, Inc. of Blauvelt, N.Y. In both cases the light Source, is Set in a cavity enclosed within the translucent products place the artificial flame above a base. A frosted material. An emission color, Such as amber, is Selected for glass cylinder, open at the top, is then Set on the base. The the LED to produce a light Similar in color to candle light. appearance is intended to be of a candle inside a glass lamp. The translucent material of the candle body diffuses the light Candles of course do not all come in one shape or size. 50 emitted from the LED to create a warm, natural looking While a classical image of a candle is of a long, thin, glow. When viewed from the side, the result is a very close tapering rod, which Stands upright in a candle Stick and approximation to a real candle when the wick has burned which leaves its flame exposed as it burns down, many down to the point that the flame is not directly visible. The candles come as a relatively short to circumference block or LED is preferably placed near the top of the translucent cylinder which is Self Supporting. Such candles commonly 55 material but centered horizontally. The thinner material leave the outer wall of the candle intact as the candlewick directly above the LED causes less diffusion of the light and burns down. When this happens, the candle flame is no produces a high intensity area of light that Simulates the longer visible when viewed from the side. This results in a appearance of a candle flame when the candle is viewed diffuse, flickering glow visible through the paraffin wall of from above.
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