| 摘要 |
This invention relates to automatic and manually deployable barriers for controlling or restricting access of individuals to specific physical areas. Various embodiments provide features such as quick deployment, incorporation into areas ranging from narrow corridors to wide atriums, aesthetically appealing integration with t he building structure, integration with various control systems, and inconspicuous appearance. Three physical layouts of these design include a drop down barrier, pop acro ss barrier and pop up barrier. The barrier material typically comprises a collapsible mechanical frame and flexible netting that meets the desired strength and durability specifications for the application such as Kevlar.TM., vinyl-coated nylon; knotted, knotles s, woven, extruded, nylon polyester or polyethylene. Other features of the invention a re also described.
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