Security door system

Details Security door system Security door system

2011-03-08

2011-03-08

Redman, Jerry (Department: 3634)

Movable or removable closures

Plural wings radiate from common pivot; i.e., revolving

C049S025000, C049S031000

Reexamination Certificate

active

07900398

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.

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Blackhawk active infrared sensor, Product Brochure, BEA, Inc., Jun. 10, 2004, 5 pp.

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