Abstract: A candle device comprises a wax body which is urged upwardly by a spring against a thermally-insulating cover. A wick projects through an aperture in the cover, and wires conduct heat from the candle flame to melt wax beneath the cover. A music generator in the form of an integrated circuit and a speaker is triggerable by a sensor to play music while the candle is burning. The sensor may take the form of a temperature-sensitive resistor, a photocell or a bimetallic switch. Other forms utilize a thermally-conducting wire to conduct heat from the candle flame to expand air in a container to operate a mechanical switch. Also disclosed is a time delay switch in the form of a tube of porous material. Water is absorbed along the tube and changes the capacitance between pairs of plates, each pair activating the integrated circuit to play a respective tune.

Abstract: A candle in the form of a wax body with an embedded or replaceable wick is supported by a spring within a tubular outer casing which has a thermally-insulating lining. A thermally-insulating cover extends across the upper end of the tubular outer casing and the wick extends through an aperture in the cover. Thermally conducting wires extend from the aperture in the cover to conduct heat to the periphery of the candle body below the cover to ensure uniform melting of the wax which flows through apertures in the cover. As the candle burns the spring urges the candle body upwards towards the cover to maintain the burning wick at a generally constant height.