US Patent 8736450 Theft deterrent device

An apparatus to deter theft of a movable product is provided. In one aspect, the apparatus comprises a housing, a plug connected to the housing to insert into an electrical socket to receive power, a bracket connected to the housing and having an opening to receive a locking cable while the opening of the bracket protrudes from the housing. A switch, within the housing, responsive to protrusion of the opening of the bracket from the housing to receive the locking cable. An electrical circuitry, within the housing, responsive to the switch being in a first state, and absence of power at the plug to sound an alarm, and responsive to the switch being in a second state or the presence of power at the plug to prevent sounding of the alarm.