| 摘要 |
Vandalism and robbery of parking meters have become big problems. The unauthorized entry into the coin box area or striking of the housing as well as bending the support pipe makes it desirable to apprehend the robbers and/or vandals. Repair of the parking meter or support may be required due to such vandalism. A radio transmitter is adapted to send simultaneously two signals to a receiver which is constantly "on". The received signal indicates unauthorized entry or vandalism to a parking meter and to the particular parking meter from which the signal is sent. Switches are actuated at an opening of the timer compartment and/or coin box area. A switch is also actuated when the supporting post is bent. A timer is placed in this circuit so that only after a determined time interval is a signal sent of the bending of a post. On new installations a tensioned wire is placed in the pipe and is actuated when the pipe is cut or severely bent.
|
