Patent References 3872280 Fumigating method and apparatus Heating device having an optimized heating element of PTC thermistor material Heater with a ferro-electric ceramic heating element Atomizer burner for oil firing plant Heater clamping arrangement for electrically heated boilers Electric fogger Electrical device for vaporizing volatiles Insecticide dispenser with a PTC heater Patent #: 4731522 InventorsAssigneeApplicationNo. 07/174460 filed on 03/28/1988US Classes:392/390, With disposable evaporant cartridge or container219/504, Comprising variable resistance means219/505, Comprising nonlinear or negative temperature coefficient resistance means219/530, With heat storage or transfer means (vanes)392/392Wall mountedExaminersPrimary: Walberg, TeresaAttorney, Agent or FirmInternational ClassesH05B 3/14 (20060101)A61L 9/03 (20060101) A61L 9/015 (20060101) AbstractAn electrically energized vaporizing unit for medications, room deodorizers, room scenting compounds, room insecticides, and the like, which is simple and inexpensive in its construction and which is compact in size. The vaporizing unit includes a housing having a central slot for holding a compressed paper fiber pad which is impregnated with the substance to be vaporized. The pad is heated by a pair of electrical heating elements which are located in the housing and positioned on opposite sides of the slot for maximum vaporizing efficiency of the pad. The housing may also contain paraffin wax. The melting point of the wax is selected to correspond to the vaporizing temperature of the particular substance in the pad. The vaporizing unit is provided with an electric plug which may be directly plugged into an electric receptacle to energize the PTC heating elements, and it does not require a switch or protective thermostat.Field of SearchVessel separable from standWith heat storage or transfer means With heat storage or transfer means With temperature or current control means Comprising variable resistance means Comprising nonlinear or negative temperature coefficient resistance means With heating unit unitary with or attached to the stand | |