Security door system
First Claim
Patent Images
1. A revolving security door system comprising:
- a substantially arcuate drum defining an enclosure and opposed openings;
a revolving door disposed for rotation within said enclosure including plural radially extending door wings and a center shaft;
a secure zone within said enclosure extending substantially from an edge of a part of said enclosure defining, in part, a first one of said openings disposed on a non-secure side of said door system and toward an edge of said enclosure defining, in part, a second one of said openings disposed on a secure side of said door system;
first sensing means detecting at least one of an intruder or object moving into said zone from said first opening and causing said door to cease rotation but allow the intruder to exit from said secure zone by said first opening;
second sensing means sensing the presence of an object remaining within said zone; and
door locking means for closing and locking said revolving door, said door locking means coordinating use of said first sensing means with said second sensing means to distinguish between intruders and objects within said secure zone, said door locking means closing and locking said revolving door in response to indication by said second sensing means of the object remaining within said secure zone only if said first sensing means indicates that the intruder has not remained within said secure zone.
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Accused Products
Abstract
A revolving security door includes a drum defining a secure zone between door openings controlled by a revolving door disposed within the drum and wherein light curtain sensors and active infrared sensors may detect an intruder moving from a non-secure side of the doorway to the secure side and detect objects left behind in a secure zone. Methods of operation prevent persons or objects from passing from the non-secure side to the secure side of the doorway.
66 Citations
26 Claims
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1. A revolving security door system comprising:
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a substantially arcuate drum defining an enclosure and opposed openings; a revolving door disposed for rotation within said enclosure including plural radially extending door wings and a center shaft; a secure zone within said enclosure extending substantially from an edge of a part of said enclosure defining, in part, a first one of said openings disposed on a non-secure side of said door system and toward an edge of said enclosure defining, in part, a second one of said openings disposed on a secure side of said door system; first sensing means detecting at least one of an intruder or object moving into said zone from said first opening and causing said door to cease rotation but allow the intruder to exit from said secure zone by said first opening; second sensing means sensing the presence of an object remaining within said zone; and door locking means for closing and locking said revolving door, said door locking means coordinating use of said first sensing means with said second sensing means to distinguish between intruders and objects within said secure zone, said door locking means closing and locking said revolving door in response to indication by said second sensing means of the object remaining within said secure zone only if said first sensing means indicates that the intruder has not remained within said secure zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A revolving security door system comprising:
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a substantially arcuate drum defining an enclosure and opposed openings; a revolving door disposed for rotation within said enclosure including plural radially extending door wings and a center shaft; a secure zone within said enclosure extending substantially from an edge of a part of said enclosure defining, in part, a first one of said openings disposed on a non-secure side of said door system and toward an edge of said enclosure defining, in part, a second one of said openings disposed on a secure side of said door system; first sensing means detecting at least one of an intruder or object moving into said zone from said first opening and causing said door to at least one of cease rotation in a predetermined position or reverse rotation; plural object detection sensors sensing the presence of an object remaining within said zone; and door locking means for closing and locking said revolving door, said door locking means coordinating use of said first sensing means with said plural object detection sensors to distinguish between intruders and objects within said secure zone, said door locking means closing and locking said revolving door in response to indication by said plural object detection sensors of the object remaining within said secure zone only if said first sensing means indicates that the intruder has not remained within said secure zone, wherein said first sensing means comprises plural receiver units disposed along the ceiling of said enclosure and plural transmitter units disposed along the floor of said enclosure generally along a radial from an axis of rotation of said door and between said axis and a part of said enclosure. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A revolving security door system comprising:
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a substantially arcuate drum defining an enclosure and opposed openings; a revolving door disposed for rotation within said enclosure including plural radially extending door wings and a center shaft; a secure zone within said enclosure extending substantially from an edge of a part of said enclosure defining, in part, a first one of said openings disposed on a non-secure side of said door system and toward an edge of said enclosure defining, in part, a second one of said openings disposed on a secure side of said door system; first sensing means detecting at least one of an intruder or object moving into said zone from said first opening and for causing said door to at least one of cease rotation or reverse rotation, but allow an authorized person to move from said second opening to said first opening; second sensing means for sensing the presence of an object remaining within said zone; and door locking means for closing and locking said revolving door, said door locking means responding to triggering of said first sensing means by activating said second sensing means and coordinating use of said first sensing means with said second sensing means to distinguish between intruders and objects within said secure zone, said door locking means closing and locking said revolving door in response to indication by said second sensing means of an object detected within said secure zone only if said first sensing means indicates that no intruder is detected within said secure zone, wherein said first sensing means comprises plural receiver units disposed along the ceiling of said enclosure and plural transmitter units disposed along the floor of said enclosure generally along a radial from an axis of rotation of said door and between said axis and a part of said enclosure. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification