Electronic timer for a coffee maker

Details Electronic timer for a coffee maker Electronic timer for a coffee maker

1996-08-29

1997-11-04

Miska, Vit W.

Horology: time measuring systems or devices

Combined with disparate device

99281, 219492, 219509, G04B 4700, A47J 3142, H05B 102

Patent

active

056847599

ABSTRACT:
An electronic timer activates a switch circuit so as to connect electrically a heating device and a power supplying unit of a coffee maker for a predetermined brewing period in order to heat water that is supplied to a filter basket and that comes from a water reservoir of the coffee maker. The processing unit activates the switch circuit for the predetermined brewing period when the brewing time coincides with the current time. A temperature sensing unit includes a temperature-controlled switch which connects the switch circuit to the heating device when temperature of the heating device is below a lower limit of a predetermined temperature range, and which disconnects the switch circuit from the heating device when the temperature is above an upper limit of the temperature range. The temperature sensing unit further includes a signal generating circuit which interconnects the temperature-controlled switch and the processing unit. The processing unit is prevented from subsequent activation of the switch circuit when duration of a switch-off signal from the signal generating circuit does not exceed a predetermined critical time period.

REFERENCES:
patent: 4566802 (1986-01-01), Koehler
patent: 4917005 (1990-04-01), Knepler
patent: 4980540 (1990-12-01), Vancha
patent: 5036836 (1991-08-01), Patel
patent: 5044261 (1991-09-01), Kawazoe
patent: 5437002 (1995-07-01), Bennett
patent: 5463932 (1995-11-01), Olson

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