| 摘要 |
PURPOSE:To surely generate an emergency alarm and to prevent a burglary, by detecting an abnormal condition, when another person, for instance, opens a door, while skillfully utilizing a function of indirectly discriminating oneself and others in accordance with the combination of memory power by the person himself with a length of time. CONSTITUTION:When a door is opened with no discrimination between by the person himself and by another person, the first delay switching circuit 20 is driven simultaneously with a door switch 8 turned on. Next, the action of the door switch 8 is stored in a memory means 10, while the second delay switching circuit 30 is driven through said memory means 10. And an alarm means 50 is driven under the condition that it is before a lapse of time T based from the first delay switching circuit 20 and after a lapse of time (t) based from the second delay switching circuit 30. Here the time (t) is set to a short time of about fine seconds, and a releasing means 2 is constituted in such a manner that it can be controlled not by another person but by the person him self by utilizing memory power of the person himself. As the result, a burglary can be prevented by enabling an emergency alarm to be promptly further surely generated when another person opens the door. |
