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A door safety barrier for being positioned adjacent a doorway having a door mounted therein for interfering with movement of the door relative to the doorway. The door safety barrier defines a security opening between the door and the doorway for preventing entry therethrough, and includes a housing

A door safety barrier for being positioned adjacent a doorway having a door mounted therein for interfering with movement of the door relative to the doorway. The door safety barrier defines a security opening between the door and the doorway for preventing entry therethrough, and includes a housing for being embedded into a floor adjacent the door. The housing defines a chamber therein. An elongate plunger is positioned within the chamber for reciprocating movement between an extended, operative position above the floor for engaging a side of the door to prevent movement of the door past the plunger, and a retracted, inoperative position below the bottom of the door for permitting passage of the door over the plunger. A latch assembly cooperates with the housing and the plunger for alternately locking the plunger in the extended, operative and retracted inoperative positions, respectively.

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A door safety barrier for being positioned adjacent a doorway having a door mounted therein for interfering with movement of the door relative to the doorway. The door safety barrier defines a security opening between the door and the doorway for preventing entry therethrough, and includes a housing

A door safety barrier for being positioned adjacent a doorway having a door mounted therein for interfering with movement of the door relative to the doorway. The door safety barrier defines a security opening between the door and the doorway for preventing entry therethrough, and includes a housing for being embedded into a floor adjacent the door. The housing defines a chamber therein. An elongate plunger is positioned within the chamber for reciprocating movement between an extended, operative position above the floor for engaging a side of the door to prevent movement of the door past the plunger, and a retracted, inoperative position below the bottom of the door for permitting passage of the door over the plunger. A latch assembly cooperates with the housing and the plunger for alternately locking the plunger in the extended, operative and retracted inoperative positions, respectively. 244/223; US-5900710, 19990500, Gautier et al., 318/675; US-6000662, 19991200, Todeschi et al. tape cartridge leader out of the tape cartridge. If the tape drive again detects that the tape cartridge locking mechanism is not released, it repeats the vibration sequence. The drive can execute a predetermined number of attempts to release the tape cartridge locking mechanism in this manner. If this process is not successful, then the tape drive logs a failure and rejects the tape cartridge by ejecting the tape cartridge from the tape drive.