Household coffee machine with calcification indicator

Details Household coffee machine with calcification indicator Household coffee machine with calcification indicator

1977-04-04

1979-02-13

Bartis, A.

Electric heating

Heating devices

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

99281, 99285, 99288, 99307, 219283, 219297, 219330, 219506, 222146HE, H05B 102, A47J 3156, F24H 110, A47J 3158

Patent

active

041397614

ABSTRACT:
A household coffee machine of the type including a thermostatically controlled electric flow heater coupled to cold water supply and having a hot water outflow is provided with a calcification indicator connected electrically in parallel with the heater thermostat. The calcification indicator includes an indicator, such as a buzzer or glow lamp, in series with a thermal cut-out switch which is disposed in thermally responsive association with the line coupling the cold water supply to the flow heater. The series connected thermal cut-out switch and indicator have a high impedance in order to insure that the calcification indicator does not respond when the heater thermostat is closed.

REFERENCES:
patent: 3711681 (1973-01-01), Leuschmer et al.
patent: 4039772 (1977-08-01), Thorsoe et al.

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