Abstract: An electric appliance has a timer for calculating the remaining time, an operation member operated by being rotated, an adjuster for adjusting the remaining time, and a display for displaying the remaining time. When the operation member is operated while the timer is counting time, the adjuster adjusts the remaining time, and the display displays the adjusted remaining time.

Abstract: A SnO.sub.2 semiconductor gas sensor for use in a cooking apparatus to detect the cooking condition is manufactured through an aging treatment for stabilizing the operation of the SnO.sub.2 semiconductor gas sensor. In the aging treatment, the SnO.sub.2 semiconductor gas sensor is disposed in a gas ambience including a gas which is developed in the cooking apparatus. More specifically, the gas ambience includes a dimethyl siloxane gas which is developed from a heated silicone compound. The gas ambience in the aging treatment is held at a high temperature, for example, 150.degree. C. through 250.degree. C. to provide the SnO.sub.2 semiconductor gas sensor of which the resistance value and sensitivity are stable even in the high temperature ambience when oven cooking is performed by the cooking apparatus.

Abstract: A combined microwave and electric heating oven including a damper mechanism for selectively and automatically introducing a forced air flow into an oven cavity. A timer is provided for determining a microwave cooking period, wherein a magnetron is energized to perform the microwave cooking operation. The damper mechanism is associated with the timer so that the damper is placed in a first condition wherein the forced air flow is automatically introduced into the oven cavity, when the timer is wound up to select a preferred microwave cooking period. When the preselected time period has been counted by the timer, the microwave generation is terminated, and the damper is placed in a second condition wherein the forced air flow is automatically never introduced into the oven cavity. The damper is placed in the second condition when the electric heating cooking is performed, whereby the interior of the oven cavity is maintained at a high temperature.

Abstract: In a type of the microwave cooking apparatus provided with a turntable rotating foodstuffs within the oven cavity to effect uniform heating, the turntable is provided to freely couple with or separate from a power transmission system including a power source. In particular, the turntable is utilized as a foodstuff shelf within the oven cavity when the it is associated with the power transmission system and also is utilized as a cooking tray when it is removed from the power transmission system and desposed directly on a dining table.