Pay-Roll Holdup Alarm Works Three Ways (Sep, 1939)
Pay-Roll Holdup Alarm Works Three Ways
Equipped with a built-in siren audible a mile away, a carrying case for bank messengers, pay-roll carriers, and others who transport valuables from place to place, has three separate switch connections to set the electric alarm for various conditions. One switch, when set, causes the alarm to sound whenever a messenger releases his hold on the bag handle. A second, used when the bag is carried in an automobile, causes the siren to sound when the case is lifted from the floor. A third actuates a timing device, making the alarm go off automatically if the bag is left unattended for a stated period.