A method of and apparatus for incorporating primary components of an EAS system into hand-supportable and countertop-supportable bar code symbol reading systems having a housing with a light transmission window covered by an optically transparent faceplate having outer dimensions closely matched to the light transmission window. About the optically transparent faceplate, a faceplate bezel is mounted embodying a coil of electrically conductive wire having terminals connected to an electrical interface circuit, which is connected to a flexible EAS cable extending from the electrical interface circuit. The flexible EAS cable extends towards electrical drive circuitry associated with the EAS subsystem, for powering the coil during EAS tag deactivation operations controlled by the host computer system.

Bar code symbol reading system employing EAS-enabling faceplate bezel

The presence or absence of objects is determined by interrogating or exciting transponders coupled to the objects using pulsed wide band frequency signals. Interrogation is broken down into a number of subsample scan cycles each having interrogation cycles a start time forward in time by a fraction of a period of an expected transponder response signal. Ambient or background noise is evaluated and a threshold adjusted based on the level of noise. Adjustment may be based on multiple noise measurements or samples. Noise detection may be limited, with emphasis placed on interrogation to increase the signal to noise ratio. Matched filtering may be employed. Presence/absence determination may take into account frequency and/or Q value to limit false detections. Appropriate acts may be taken if detected noise is out of defined limits of operation, for example shutting down interrogation and/or providing an appropriate indication.

Method, apparatus and article for detection of transponder tagged objects, for example during surgery

The presence or absence of objects (e.g., medical implements, medical supplies) tagged with transponders may be determined in an environment in which medical procedures (e.g., surgery) are performed via an interrogation and detection system which includes a controller and a plurality of antennas positioned along a patient support structure. The antennas may, for example, be positioned along an operating table, bed, a mattress or pad or a sheet and may be radiolucent. Respective antennas may successively be activated to transmit interrogation signals. Multiple antennas may be monitored for responses from transponders to the interrogation signals. For example, all antennas other than the antenna that transmitted the most recent interrogation signal may be monitored.

Method and apparatus to detect transponder tagged objects, for example during medical procedures

An electronic article surveillance apparatus for monitoring large objects is comprised of a base, at least one segment of tape, and an electronics housing. The segment of tape has a least one electrically conductive element running the length of the tape. The base rests on an object to be monitored, and the housing releasably latches onto the base, while each tape segment wraps around the object with each end of tape segment being fixed between the base and housing. Electronics within the housing complete a circuit through each tape segment and monitor the tape segments for electrical continuity. If electrical continuity is lost, either by cutting a tape segment, or unauthorized unlatching of the housing, an alarm can be sounded by the electronics within the housing. The electronic housing may be disarmed by a remote device and delatched from the base. Both base and tape segments may have adhesive elements.

Eas tag using tape with conductive element

A security tag assembly structured to restrict unauthorized removal of merchandise from a designated area is presented. The security tag assembly comprises a base and a tag member removably connected to the merchandise being protected or monitored. A locking assembly is disposed within the base and is structured to be biased into a locking orientation relative to a connector pin of the tag member. A release assembly, also disposed within the base, is structured to facilitate the authorized release of the locking assembly upon application of an externally applied detachment assembly. In particular the release assembly comprises a displacement structure including coaxially disposed first and second members connected via an at least partially flexible biasing connector comprising an arcuate or “U” shaped configuration. The second collar is structured for disposition into a displacing engagement with the locking assembly upon the forced movement of the first collar.

Security tag assembly

An single use, disposable electronic article surveillance tag is claimed wherein the tag features a spindle assembly which anchors and retains a set of ball bearings which are used to clutch and retain the shaft of a tack. The spindle features an operational tab which may be contacted by the appropriate probe to turn the spindle about a central axis.

Disposable, single use security tag

An electronic article surveillance tag is claimed wherein the tag features a spindle assembly which anchors and retains a set of ball bearings which are used to clutch and retain the shaft of a tack. The spindle features an operational tab which may be contacted by the appropriate probe to turn the spindle about a central axis. The spindle is seated in a retaining means with a graduated lip around the perimeter. The turning of the spindle serves to raise a portion of the spindle from the retaining means, loosening the ball bearing grip on the shaft of the tack. The electronic article surveillance tag may be used with either a smoothed or grooved tack shaft and may be operated by either mechanical probe actuation or by the use of a magnetic detachment means applied to the spindle.

EAS tag detachable by multiple methods

EAS tag with ball clutch

An electronic article surveillance tag features a spindle assembly which anchors and retains a set of ball bearings which are used to clutch and retain the shaft of a tack (24). The spindle (16) features an operational tab which may be contacted by the appropriate probe to turn the spindle (16) about a central axis. The spindle (16) is seated in a retaining means with a graduated lip around the perimeter. The turning of the spindle (16) serves to raise a portion of the spindle (16) from the retaining means, loosening the ball bearing grip on the shaft of the tack. The electronic article surveillance tga may be used with either a smoothed or grooved tack (24) shaft and may be operated by either mechanical probe actuation or by the use of a magnetic detachment means applied to the spindle (16).

Electronic article surveillance tag

EAS tag with lanyard

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