| 摘要 |
PURPOSE:To make a number of terminals of a reset switch into two in an extremely simple constitution, by providing the reset switch having the two terminals in series with a reset coil. CONSTITUTION:A reset switch 3A consists of two terminals, which is turned off normally. Accordingly, an integrated circuit 4 is electrified and the integrated circuit 4 is operatable. In a non-ignition state, an alarm output terminal 4c is turned to an Lo level, a set coil 6s is actuated and a contact point 4x is turned off. When the reset switch 3A is turned on in this state, a reset coil 6R is electrified and a contact point 6x is restored. At the same time, the integrated circuit 4 is reset and respective output terminals 4d and 4c are turned to an Hi level as a power source to the integrated circuit 4 is short-circuited through a diode 11. Thus, a number of terminals for the reset switch can be made into two in an extremely simple constitution and a terminal base can be miniaturized. |
