Surveillance and control system for emergency exists installed in a building
Patent 4652862 Issued on March 24, 1987. Estimated Expiration Date: 
March 5, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 5, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3701100 Video switcher System for detaining robbers on premises Security apparatus for controlling access to a predetermined area Patent #: 4581634 InventorAssigneeApplicationNo. 06/708086 filed on 03/05/1985US Classes:340/540, Specific condition109/21, With alarm, signal or indicator109/38, With alarm, signal or indicator109/43, Closure movement initiated292/92, Emergency operating means340/309.16, Timer control340/309.8, Separate diverse device activated by timer340/5.3, Having indication of improper access340/5.64, Wireless transmitter340/505, Interrogator-responder340/527, Time delay340/528, Entrance/exit340/542, Lock348/143, Observation of or from a specific location (e.g., surveillance)49/14, Indicator at remote station49/279, OPERATOR INTERRELATED WITH CLOSURE LATCH RELEASE49/30, Predetermined delay governs start of closure movement49/31, CONDITION RESPONSIVE CONTROL70/263, Operation and control70/267, Predetermined time interval controlled70/270, Repeating interval70/92Emergency exitExaminersPrimary: Crosland, Donnie L.Attorney, Agent or FirmInternational ClassesG08B 25/01 (20060101)E05B 47/00 (20060101) E05B 65/10 (20060101) Foreign Application Priority Data1984-03-06 FRAbstractA building has at least one security guard post to control the secured building exits, each of which has an unlocking instrumentality, without forbidding their emergency use. When activating the unlocking instrument to open a secured exit, there is a transmission of information to the security guard post and an initiation of a delay during which the security guard can forbid the opening of the exit. The unlocking instrument can also visually indicate events at the exit. The apparatus has an electro-mechanical lock, a sensor which is sensitive to motion of the unlocking instrument, a control line linking each door to be controlled to the security guard post, and a central electronic processing unit. A surveillance circuit responds to the sensor. A security circuit frees the unlocking instrument when a fault is detected. | |
