Abstract: A security system to create and maintain a secure communication link between a remote secure storage site and a law enforcement office using a continuous prearranged encrypted signal on the communication link. The authenticity of the encrypted signal is validated at the law enforcement office. Interruption of the encrypted signal is treated as an alarm that must be investigated. Sensors at the remote secure storage site detect intrusions and trigger the transmission of an alarm signal from the site to the law enforcement office on the communication link. The law enforcement office may enable video cameras or containment devices in the event of an intrusion.

Abstract: A security system to create and maintain a secure communication link between a remote secure storage site and a law enforcement office using a continuous prearranged encrypted signal on the communication link. The authenticity of the encrypted signal is validated at the law enforcement office. Interruption of the encrypted signal is treated as an alarm that must be investigated. Sensors at the remote secure storage site detect intrusions and trigger the transmission of an alarm signal from the site to the law enforcement office on the communication link. The law enforcement office may enable video cameras or containment devices in the event of an intrusion.

Abstract: A method for making a large trough reflector of cylindrical shape comprises the step of exerting twisting moments on the opposing longitudinal edges of a flexible reflective sheet. The twisting moments are exerted in equal but opposite increments until the shape of the reflector is governed mainly by the twisting moments, rather than any end loading forces which, acting in the plane of the longitudinal edges of the sheet, would tend to push together or separate the edges of the sheet. Also disclosed is a trough reflector manufactured according to such method.