Electronic timer for a coffee maker
Patent 5684759 Issued on November 4, 1997. Estimated Expiration Date: 
August 29, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 29, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesElectronic cycle timer for a household appliance Beverage brewer with brewing temperature interlock Positive power-off circuit for electrical appliances Lithotripter with shock-wave generator movement mechanism Coffee brewing apparatus Water heater control circuit including an empty tank sensor Coffee maker Patent #: 5463932 InventorsAssigneeApplicationNo. 705532 filed on 08/29/1996US Classes:368/10, COMBINED WITH DISPARATE DEVICE99/281, Of heat219/492, Comprising timing or cycling means219/509Automatically operatedExaminersPrimary: Miska, Vit W.Attorney, Agent or FirmInternational ClassesG04B 047/00A47J 031/42 H05B 001/02 AbstractAn 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.Field of SearchCOMBINED WITH DISPARATE DEVICEAutomatic control Of heat And infusive contact Of infusive contact With signal, indicator or observation means Cartridge type With liquid supply or directing means Gravity feed infusor With force feed supply Comprising timing or cycling means Electromechanical Thermally responsive Including semiconductor means (e.g., transistor) Comprising nonlinear or negative temperature coefficient resistance means Plural means intermittently or selectively operated Automatically operated Thermally responsive | |
