An alarm device which automatically activates a patrol car horn, siren,
emergency lights, and/or voice annunciator on a public address loud
speaker upon the unauthorized release of a seat belt by a detainee. A
relay and control switch are installed in conjunction with the existing
seat belt switch circuit underneath a patrol car seat such that they are
undetectable by an occupant. After the seat belt is engaged by an officer,
the officer may activate a control switch to arm the alarm. Subsequently,
if the detainee releases the seat belt, the relay is activated which
provides power to the patrol car horn, siren, or lights. This not only
warns the officer, who may be outside and far away from the patrol car,
but also may startle the would-be escapee. The alarm may be employed in a
front passenger seat, as well as in either rear passenger seat.
