| 摘要 |
PURPOSE:To ensure that a heater is energized a predetermined length of time earlier than the time of alarming, an alarm buzzer is actuated at the time for rising and a heating operation is started by simply setting the time for operating the buzzer and the current time. CONSTITUTION:When the time switch is set, a handle shaft 35 is rotated counterclockwise by a flat spiral spring 15, and a projection 36 of a cam 29 collides against a rotary lever 32 and is rotated. When a recess of the cam 29 reaches the tip of a microswitch-driving arm 38, the arm 38 is rotated downwares by a spring 40, and a button 41 of a microswitch 26 is projected, so that the switch 26 is turned ON to start the supply of an electric current to the heater. Next, a driving arm 45 is similarly rotated by a rotary lever 33 for the alarm buzzer and a microswitch 27 is turned ON, so that the alarm buzzer buzzes. The buzzing is continued until a microswitch 28 is subsequently operated. |
