Abstract: A controller for use in generating signals for enabling control of a plurality of functions of a camera and lens assembly comprising a movable member having a first region adapted to be engaged by a user's first finger for moving the movable member in a plurality of directions to develop first and second signals for controlling first and second functions of the camera and lens assembly, and at least a plurality of further regions with each of the further regions being finger reachable by another finger of the user when the user's first finger is engaging the first region and being adapted to be finger actuatable to develop a signal for enabling control of a further function of the camera and lens assembly.

Abstract: An EAS tag in which the tag is held to an article by an attaching assembly a part of which is releasably prevented from being withdrawn from the body of the tag. The tag body is provided with an arcuate channel through which an arcuate detacher probe can be guided for releasing the attaching assembly part. A spring clamp provides the releasable preventing function and includes jaws specifically adapted to respond to in-plane torsional forces provided by the arcuate probe which is moved through the arcuate channel by rotation to reach the spring clamp. Hand and power actuated detacher assemblies incorporating the arcuate probe are also provided.

Abstract: A gaming chip has a disc-like body in which is disposed an amorphous magnetic marker material.

Abstract: An EAS system in which a transmitter alternately drives first and second antennas with the same coded message signal in its entirety. The antennas, in turn, transmit first and second signals each containing the coded message signal into respective first and second partially overlapping parts of an interrogation zone. Also disclosed is an antenna structure comprised of a plurality of loops extending one after the other and successive ones of which are of opposite phase. One of the loops circumscribes an area which is smaller than each of the other loops to realize reduced coupling to adjacent structures.

Abstract: A surveillance assembly in which a camera and lens assembly is surrounded by a shroud to form an eyeball assembly which is rotatable about first and second axes and which is enclosed within a housing. A carriage assembly for mounting the eyeball assembly to the housing is provided in the surveillance assembly and includes pivot and engagement parts which allow the carriage assembly to be pivoted into position. Additionally disclosed is a camera/lens mounting with a resilient annular member for permitting adjustment of the mounting along the lens axis and a cable support assembly for an electrical cable connected between a camera lens assembly and another part of a surveillance assembly in which the cable support assembly permits the cable to be wound about the pivot axis of the camera and lens assembly.

Abstract: A surveillance assembly wherein a support housing and a cover member when joined form a space for receiving a camera and lens assembly and wherein a forced air delivery assembly is adapted to provide forced air to the cover member from points distributed about substantially the entire circumference of the cover member.

Abstract: An EAS system in which first and second received signals are independently front-end processed to produce third and fourth signals indicative of the absolute values of the first and second processed signals. The third and fourth signals are then combined and the combined signal passed to a tag evaluation processor for time and frequency domain processing for evaluating whether a tag is present in an interrogation zone. The front-end processing is carried out in such a way that interference signal content including shield interference is extracted without extracting tag signal content in the received signals over a period of time. In this way, the first and second transmitter antennas of the system can be driven with drive signals having a phase difference of other than 0.degree. or 180.degree. and the tag evaluation processing can be carried out during the entire period of the drive signals.

Abstract: An electronic article surveillance tag which is responsive to forces applied to the tag's housing. The tag has a piezoelectric film which is attached to the tag housing in such a way that forces which are applied to the tag housing are mechanically coupled to the piezoelectric film. The piezoelectric film generates a voltage which is proportional to the forces mechanically coupled thereto. An alarm detecting means compares the voltage generated by the piezoelectric film with a predetermined reference voltage, and initiates an audible alarm when the voltage generated exceeds the predetermined reference voltage.

Abstract: An EAS tag comprising a tag body having a central region, side wall regions connected to and integral with the central region and flap regions connected to and integral with the side wall regions. The tag body has fold lines at the junctions of the central and side wall regions and at the junctions of the side wall regions and the flap regions. By folding the tag body along these fold lines and, in the course of the folding procedure, inserting a first magnetic element, a substantially closed box-like housing with the first magnetic element loosely housed therein is formed.

Abstract: A semi-hard magnetic element is formed of an amorphous soft iron-metalloid material containing at least 50 atomic percent iron and at least a part of the bulk of which has been crystallized to give the overall element semi-hard magnetic properties.

Abstract: An EAS system in which a transmitter transmits an RF transmitter signal into an interrogation zone and a receiver receives RF signals from the interrogation zone. The received RF signals include any RF tag signals generated by tags situated in the zone and adapted to respond to the RF transmitter signal. In order to reduce interference effects, the RF carrier frequency of the transmitter signal is adapted to take on a plurality of different frequency values during different ones of a plurality of finite dwell time periods of the RF transmitter signal.

Abstract: A deactivating device for deactivating a dual status EAS tag for use in an EAS system in which the device utilizes a detection field for detecting the presence of an active tag in a detection/deactivation zone and in which the device further utilizes a deactivation field which is matched to the detection field.

Abstract: An auto-iris control device for automatically controlling an adjustable iris of a surveillance camera. The auto-iris control device has an adjustably settable reference level which can be adjusted by an operator at a remote location. A comparator compares the reference level against the average video level of the video signal output from the surveillance camera. Based upon the result of the comparison, iris control signals are generated for controlling the adjustable iris.

Abstract: In an EAS system a transmitter alternately drives first and second antennas with the same coded message signal in its entirety. The antennas, in turn, transmit first and second signals each containing the coded message signal into respective first and second partially overlapping parts of an interrogation zone. Also disclosed is an antenna structure comprised of a plurality of loops extending one after the other and successive ones of which are of opposite phase. One of the loops circumscribes an area which is smaller than each of the other loops to realize reduced coupling to adjacent structures.

Abstract: An antenna arrangement in which a first antenna means is arranged to define a null contour adjacent the first antenna means and at which the magnetic flux from the first antenna means is substantially a null and in which a second antenna means is arranged to substantially follow the null contour.