US 4,309,585 A · Error alarm system in a microwave oven

Abstract

A microwave oven comprises a digital control circuit for controlling microwave generation, and a multi-digit digital display unit for displaying a cooking condition. A determination system is associated with a door switch for developing a display control signal when a cook start switch is actuated before an oven door is tightly closed. In response to the display control signal, an alarm display, for example, "DOOR" is provided on the multi-digit digital display unit. The microwave oven further comprises a food temperature sensor probe for sensing a temperature of foodstuff being cooked. The multi-digit digital display unit provides another alarm display, for example, "PROBE" if the cook start switch is actuated under the condition where the food temperature sensor probe is not placed in its operative condition even though the food temperature control mode of operation is selected.

Claims6

Dependent claims

In a microwave oven comprising an oven body, an oven door secured to the oven body, a multi-digit digital display unit, and a cook start switch for instructing initiation of microwave generation, the improvement comprising:

a first detection switch means for detecting whether said oven door is closed or open;
a first determination means associated with said first detection switch means and said cook start switch for developing a first control signal when said cook start switch is actuated under the condition where said oven door is open;
and
a first display driver for providing an alarm display on said multi-digit digital display unit in response to said first control signal.

1 more element

Dependencies are inferred from the claim text.

Error alarm system in a microwave oven

Life of this patent

Error alarm system in a microwave oven

Life of this patent

Abstract

Claims6