Delay-based access control apparatus and method

Details Delay-based access control apparatus and method Delay-based access control apparatus and method

2004-10-12

2008-11-18

Nguyen, Tai T (Department: 2612)

Communications: electrical

Condition responsive indicating system

With particular system function

C340S528000, C340S545100, C340S545300, C340S556000, C340S541000, C340S005700, C340S005710

Reexamination Certificate

active

07453351

ABSTRACT:
An access control mechanism such as a movable barrier operator (70) has a first time window unit (72) that is responsive to one or more triggers (71) (such as a delayed-closure button). An event detector (73) then monitors for one or more events of interest during a corresponding first time window. For example, the event detector can monitor for evidence that a vehicle is moving towards a garage exit or has effected an exit from the garage. A second time window unit (74) responsive at least to the event detector and optionally as well to the first time window unit then responds with a second time window. Upon conclusion of the second time window, a movable barrier closer (75) initiates movement of the corresponding movable barrier towards a closed position (or other position of interest).

REFERENCES:
patent: 4429264 (1984-01-01), Richmond
patent: 6326754 (2001-12-01), Mullet et al.
patent: 6388573 (2002-05-01), Smith et al.
patent: 6437527 (2002-08-01), Rhodes et al.
patent: 7242295 (2007-07-01), Milinusic et al.

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