E - Fixed Constructions – 05 – G
Patent
E - Fixed Constructions
05
G
342/17
E05G 5/00 (2006.01) E05F 15/00 (2006.01) E05G 7/00 (2006.01)
Patent
CA 2029954
-6- ABSTRACT OF THE DISCLOSURE An anti-jamming device for a security screen arrangement, in which a security screen is able to by rapidly fired from a rest position to an upper position at which passage of a person from one side of the screen to another is not possible, includes sensors for detection whether the screen is at the rest position or the upper position. The device also includes a valve for lowering a screen when it does not reach the upper position, due to the screen having been jammed, and for reactivating the firing of the screen. The screen may be repeatedly fired until the obstruction is cleared.
Cardinal Michael J.
Malcolm Johnston & Associates
Safetell International Security Ltd.
Safetell Security Screens Limited
LandOfFree
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