Coffeemaker water heater having an arrangement for thermally rem

Details Coffeemaker water heater having an arrangement for thermally rem Coffeemaker water heater having an arrangement for thermally rem

1977-11-04

1980-09-23

Bartis, A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

99281, 99288, 122379, 134 17, 134 19, 134 22C, 165 95, 202DIG1, 219301, 219328, H05B 102, F24H 700, F28G 1300, A47J 3156

Patent

active

042245036

ABSTRACT:
There is provided a coffeemaker comprising a water reservoir, a quartz-glass tubular heating chamber having an external electrical heating element in contact therewith, an inlet tube for conducting water from the reservoir through the chamber, and an outlet tube for discharging the heated water over ground coffee. Associated therewith is a switch responsive to the temperature of the heating chamber wall for automatically de-energizing the heating element. When the flow of water through the heating chamber ceases, the heat capacity of the heating chamber, the electrical power consumption of the heating element, and the location and the adjustment of the temperature-responsive switch are so related to each other that the heating chamber walls will be rapidly heated to a temperature of at least about 450.degree. C. before the heating element is de-energized by the temperature-responsive switch. The result is that any scale on the heating chamber walls is thereby thermally decomposed and removed.

REFERENCES:
patent: 1191451 (1916-07-01), Morterud
patent: 2452367 (1948-10-01), Gangloff
patent: 3423568 (1969-01-01), Meckley et al.
patent: 3691934 (1972-09-01), Horn et al.
patent: 3870468 (1975-03-01), Neti
patent: 4032748 (1977-06-01), Vischer et al.
patent: 4122763 (1978-10-01), Waninger et al.
patent: 4139761 (1979-02-01), Obrowski
patent: 4141286 (1979-02-01), Smit

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