Abstract: A method of controlling a security assembly comprising a frame member and at least one door is disclosed. The method comprises the step of when a door is required to be opened, determining whether the door has been open within a predetermined past time period, such as the past hour. If the door has not been open the predetermined past time period, the door is allowed to be opened. However, if the door has been open during the predetermined past time period, the door is not allowed to be opened.

Abstract: A security assembly comprising a frame member (12) and a plurality of doors (14) is mountable inside the housing (4) of an ATM or safe etc. Each door (14) can be opened and closed independently of the other doors. Referring to FIGS. 4 and 5, each door (14) is attached to the frame member (12) by a hinge (16). A barrier member (18), which acts to lock the door (14), is mounted to the door (14) by two pivoting brackets (20). When in the locked condition, the barrier members (18) extend substantially along the whole length of the edge of the door to prevent access through the boundaries between the doors and the frame. A barrier member actuator in the form of a plurality of independently moveable locking blades (22) is slidably mounted to the frame (12), the locking blades (22) being actuated by drive means (not shown).

Abstract: A method of inserting a communications module (6) into a wireless communication system (1) comprising at least one control module (2) and a plurality of communications modules (3, 4, 5) is disclosed. The system (1) is adapted to transmit messages either directly or indirectly between modules and each module is adapted to receive a wireless message and transmit a wireless message to a further communications module or to a control module. The communications module (6) is inserted into the system (1) and transmits a first signal in a set-up mode. If the first signal is detected by at least one pair of modules (2, 3, 4, 5), the communications module (6), by means of a signal from a control module (2), is installed to communicate directly with the two modules of at least one pair of modules.

Abstract: A method of transmitting wireless messages in a communications system (201) having a plurality of transceiver units (203) for receiving and onwardly transmitting wireless messages is disclosed. In a first mode of the system, messages are transmitted from a first transmitter to a target receiver by sequential transmission via at least one transceiver unit (203). In a second mode, a wireless message containing information identifying a target receiver is transmitted from a first transmitter. The target receiver transmits an acknowledgement signal in response to receipt of the message, and at least one of the transceiver unit (203) transmits the message if that unit does not detect within a predetermined period the acknowledgement signal or transmission of the message by a predetermined other transceiver unit (203).

Abstract: A signal processing apparatus (1) comprises an analogue RF receiver (2) which has a local oscillator (7). The analogue receiver (2) receives in use a first electrical signal from antenna (4) at a carrier frequency, which signal is modulated by a digitised modulating signal to provide a second electrical signal having an amplitude representing an instantaneous logic level of the digitised modulating signal. The apparatus further comprises a digital processor (13) for processing the second electrical signal and providing an output signal in response thereto. The digital processor is controlled in use by clock signals provided in response to actuation of a local oscillator of the analogue receiver.

Abstract: A security arrangement for a building comprises a control module, an alarm and a multiplicity of stations each station being actuated upon receipt of a signal from the control module, each station incorporating a detector adapted to provide a signal indicative of the status of the station, the stations further comprising locks or other security devices, the control module being arranged to actuate the alarm on detection of unauthorized status of the station.