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AssigneeEdgecraft Corporation
InventorsTom Long, Daniel D. Friel, Sr., Daniel D. Friel, Jr., James M. Fitzgerald, H. William Busch, Jr.
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An electrically heated water kettle comprises a vessel for holding a liquid for extraction of tea, coffee or other food material. The vessel includes a partially open immersible container sized to allow the passage of water between the walls of the vessel. The container is capable of holding the material while an opening in the container allows the entrance of water into the container upon immersion of the container in the water. The heated kettle incorporates structure to hold the container out of the water until the water reaches an appropriate extraction temperature and to immerse or withdraw the container into or from the water as is necessary to accomplish the extraction.
An electrically powered heated kettle comprising an unsealed vessel for holding a vaporizable liquid, a heater capable of heating the liquid in said vessel to the boiling point of the liquid at the prevailing atmospheric pressure, an electrical heater controller to adjust the amount of power delivered to said heater, an electronic signal processor to direct said controller to adjust the amount of electrical power to said heater, an electrical sensor located to generate an electrical signal that varies predictably with the temperature of the liquid or the air/vapor mixture directly adjacent the liquid in said vessel as the liquid is heated by said heater to the boiling point, and to transmit said signal to said electrical signal processor, whereby said processor can determine the instant in time that the rate of rise of liquid temperature essentially goes to zero and can therefore establish that the liquid is boiling and direct said controller to reduce the amount of electrical power delivered to said heater.
An electrically heated water kettle comprising an electrical heater, a heater controller, a thermal sensor located to generate a signal predictably responsive to the temperature of the water or its vapor, an associated electronic processor to monitor the signal output of said sensor while the water is being heated and to sense the rate of rise of that output signal indicative of water temperature to detect the instant in time that the rate of rise of water temperature goes essentially to zero, which the electronic processor can identify as the beginning of boiling at the local atmospheric pressure and direct the heater controller to reduce the electrical power applied to the heater.
An electrically heated water kettle for holding water comprising at least one heater of the water, a controller to adjust the amount of heat applied to the water, a thermal detector with a parameter that is predictably responsive to the temperature of the water or its vapor, an electronic processor to monitor that responsive parameter as the water is heated and to determine the rate of change of that parameter in order to establish the instant in time that the rate of temperature rise goes to zero as an indication of the beginning of water boiling at the local atmospheric pressure and to then cause said controller to reduce the electrical power applied to said at least one heater.
An electrically powered heated water kettle comprising a heater for the water, a temperature sensor mounted in thermal contact with one of the water and the kettle to create a signal directly correlatable with the water temperature in the kettle, an electrical processor/controller to receive said signal from the sensor to determine the rate of rise of said signal and to control power function selected from the group consisting of turning off, and adjusting the amount of power delivered to said heater when the rate of change of the water temperature reaches a predetermined rate.
An electrically powered heated water kettle comprising a heater for the water, a temperature sensor mounted in thermal contact with one of the water, the vapor space and the kettle to create a signal directly correlatable with the temperature of the water in the kettle, and an electrical processor/controller to receive said signal from said sensor to monitor the rate of change of that signal and to adjust the amount of power delivered to the heater in accordance with the measured rate of temperature change or according to the change in that rate.
An electrically powered heated water kettle comprising a heater for the water, a temperature sensor mounted in thermal contact with one of the water, the vapor space and the kettle to create a signal directly related to the water in the kettle, an electrical processor/controller that receives said signal from the sensor and controls the amount of power delivered to the heater in accordance with the users control settings and the measured rate of temperature change of the water and reduces the amount of power to the heater if the rate of change of water temperature is abnormal indicating the kettle is dry or in the process of boiling dry.
An electrically powered heated water kettle comprising a heater for the water, a temperature sensor mounted in thermal contact with the water, the vapor space of kettle to create a signal directly correlatable with the temperature of water in the kettle, an electrical processor/controller to receive said signal from the sensor to monitor the rate of change of that signal with time and to adjust the amount of power delivered to the heater in accordance with the measured rate of temperature change with time or according to the change of that rate with time.
An electrically powered heated water kettle comprising a heater for the water, a temperature sensor mounted in thermal contact with the water, the vapor space or kettle to create a signal directly correlatable with the temperature of the water in the kettle, an electrical processor/controller to receive such signal from the sensor to monitor the rate of change of that signal when the water is being heated by said heater and when the water is allowed to cool with no power applied to the heater and to determine from the rates of change the actual amount of water in the kettle and whether the kettle lid is closed.
An electrically powered heated water kettle comprising a heater for the water, a temperature sensor mounted in thermal contact with the water, the vapor space or kettle to create a signal directly correlatable with the temperature of the water in the kettle, an electrical processor/controller to receive said signal from the sensor to monitor the rate of change of that signal with time and to adjust the amount of power delivered to the heater in accordance with the measured rate of temperature change with time or according to the change of the rate with time.
An electrically powered heated water kettle comprising a heater for the water, a temperature sensor mounted in thermal contact with one of the water and the kettle to create a signal directly correlatable with the water temperature in the kettle, and an electrical processor/controller to receive said signal from the sensor to determine the rate of rise of said signal and to turn on a lower powered heater or to reduce power to maintain a slowly boiling condition.
Dependencies are inferred from the claim text.