A security system for protecting articles (8), the system comprising at least one Electronic Article Surveillance (EAS) loop (1) , one Emitting Unit (7) and one Detecting Unit (9) attached to each article (8) to be protected, the Detecting Unit (9) having a detector to detect electromagnetic fields emitted by the EAS loop (4) and the Emitting Unit (7) and to distinguish between them, and an alarm generator for generating an alarm if a predetermined sequence of fields is detected. The system comb...

Security systems for the protection of rooms containing valuables against the exit of unauthorized persons, particularly for cashier's boxes in banks, strong rooms or similar business premises, including electrodes in a position to come into contact with an intruder and means to secure the intruder to the electrode to thereby prevent escape.

A security system for controlling access to an area includes a lock responsive to a control for providing access to a secured area. The control includes means for sequentially generating a plurality of coded signals and circuitry responsive to the signals for operating the lock or an alarm. The lock is actuated to provide access to the secured area when the proper signals are sequentially generated in a predetermined manner. The alarm is actuated and entry to the secured area is denied when inco...

A security seal having a flexible strip intended to be piercingly inserted through at least one opening of an article which is to be sealed, both ends of the strip after having been flexed over upon themselves being non-releasably connected with one another. To that end the flexible strip is provided at one end with at least a portion of a closure and at its other end either with the other portion of the closure or carries an element which can be engaged with the closure. The one closure portion...

A security hasp for a door which when the door is closed projects forward along side a fixed keeper in position to be locked thereto by a padlock. For security a shrouded padlock is used having a lock case which shrouds its shackle and form a yoke embracing the hasp and keeper from below, and the hasp carries a hood which projects across the keeper and across the yoke opening of the padlock and thereby cooperates with the shrouds to shield the lock shackle from access by a cutting tool.

A security clip which is particularly adapted for securing a tape strip in a closed loop form has a pair of hinge connected arms normally disposed in an open, diverging attitude. One of the arms is adapted to be fastened to the end of a tape strip and carries means for engaging and securing a reach of the tape strip fed between the arms to clamp the strip in a closed loop configuration when the arms are closed. The arms carry cooperating cutting elements which sever the tape strip when the arms ...

A pair of jaws are mounted in a housing for engagement around the kingpin of a trailer. The jaws when closed may be locked to prevent the removal of the device from the kingpin. The bottom wall of the housing is provided with a guide way to guide the kingpin into engagement with the jaws and the jaws will rest on the head of the kingpin when closed. The housing side walls are deformable to permanently lock the jaws closed if struck by an external force.

A security seal embodying a hard core attached to a tape end and having a slot therein to receive the other tape end, wherein the assembly is enclosed in a deformable sleeve.

An electrooptical intruder detection system including alignable emitting and detecting elements, such as semiconductor diodes. Each element is disposed in a holder member having a semispherical head portion which cooperates with a mounting plate and retainer member to provide the alignment function. In addition, the emitting element may be mounted in an adapter member which is axially adjustable relative to the holder member. Installation in an electrical outlet having various apertures for expo...

A security card for use with electronic locks, accounting systems and other electrical identification and data processing systems comprising a plastic wallet-size card with a coded permutation circuit imbedded in the card. Terminals connected to the circuit are exposed through a window in at least one side of the card for mating with matching contacts in a receptacle at a remote station of a security system. The terminals are spaced from the inserting edge of the card a sufficient distance to av...