How should one make sure that nobody can enter the home without permission?
Controlling the entrances to one’s home is a subject needing some attention. When a button is pushed by a visitor calling at the main door, door chimes or doorbells ring a loud sound that is meant to be heard.
In large houses they can ring a tune or a melody in many spots all over the place, just to make sure that the message is heard even when it might be submerged by TV, radio, children clamor or animated conversation.
We may wish however to put in place also a system of door chimes capable of alerting us when somebody tries to enter our home without ringing at the door.
How did long ago small shopkeepers keep an eye on customers or tramps coming in when they were busy in the back-shop? A bell or a chime was hanged to the shutter, to ring as it was jerked by the opening door.
Nowadays there are more modern means to perform the same duty, electronic chimes playing a melody or sending a signal, but the principle is the same.
What is needed is a number of electronic sensors or alarms set to monitor the position of all entrance closures. When a dangerous event is detected, in this case the opening of a passage that was meant to stay shut, a signal is dispatched to the central instrument set to perform the preprogrammed actions.
A properly set up system of door chimes can call to our attention if an entrance closure is suddenly opened to let somebody sneaking in. If we do not wish to meet the intruder, then a siren can be set to go off to scare him/her away.
If we are not at home when the signal is triggered, the system may call us, or our neighbors or security officers, so that proper actions may be taken to limit the damage.
Setting up a good door chimes system is one more precaution that we owe to ourselves if we wish to do all we can to prevent ugly surprises from intruders.
