Percolator-controlalator

Claim 1

In an electric coffeepot for extracting 18-22 percent of soluble solids from ground coffee: a container for holding water, said container being provided with a thermally conductive bottom wall; a hollow stem member supported by said bottom wall; a coffee grounds holding basket supported on said stem member near the upper end thereof; a pressurizer chamber mounted on said stem member so as to receive water therefrom and to discharge same into said basket as jets substantially at 195 + OR - 5* F.; electric heater means for supporting said container and for transferring heat to the water in said container so as to quickly bring the temperature of the water to substantially 165* F. and for maintaining the said temperature for a presettable finite interval of time of sufficient length to extract the desirable amount of soluble solids from the coffee grounds, the heater means including first circuit means for supplying electrical energy to said heater means and including first switching means presettable for a predetermined period of time to open said circuit at the end of said period and second switching means responsive to the temperature of the water for opening the circuit whenever the temperature rises above 165* F.; and second circuit means operative upon the opening of said first switching means for substantially reducing the heat supplied to fluid in the container.