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  2. SimplexGrinnell - Wikipedia

    en.wikipedia.org/wiki/SimplexGrinnell

    Frederick Grinnell, an 1855 graduate of Rensselaer Institute (now Rensselaer Polytechnic Institute), [4] worked in railroad engineering until he retired as chief mechanical engineer and general manager of the Jersey City Locomotive Works. Soon after his retirement, he purchased a controlling interest in the Providence Steam and Gas Pipe Company.

  3. Perimeter intrusion detection - Wikipedia

    en.wikipedia.org/wiki/Perimeter_intrusion_detection

    A fence-mounted perimeter intrusion detection system installed on a chain link fence. A perimeter intrusion detection system (PIDS) is a device or sensor that detects the presence of an intruder attempting to breach the physical perimeter of a property, building, or other secured area.

  4. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    The alarm system is required to have a maintenance check carried out every 6 – 12 months. In the UK, 'Audible Only' intruder alarm systems require a routine service visit once every 12 months and monitored intruder alarm systems require a check twice in every 12-month period.

  5. Voice-activated radio-dispatched alarm - Wikipedia

    en.wikipedia.org/wiki/Voice-activated_radio...

    A voice-activated radio-dispatched alarm, or VARDA-alarm, is a type of burglar alarm that, when activated or "tripped", broadcasts the type of the alarm and the transmitter location over the local police radio frequency using a pre-recorded audio message. [1] In 1968, the voice-activated radio dispatched alarm (VARDA), was invented.

  6. Standards for Alarm Systems, Installation, and Monitoring

    en.wikipedia.org/wiki/Standards_for_Alarm...

    The Underwriters Laboratories' UL 365 is a safety standard that governs the construction, performance, and maintenance of police station-connected burglar alarm units and systems. These systems are designed primarily for use in mercantile premises, including mercantile safes and vaults, as well as bank safes and vaults.

  7. Security guard - Wikipedia

    en.wikipedia.org/wiki/Security_guard

    A security guard (also known as a security inspector, security officer, factory guard, or protective agent) is a person employed by a government or private party to protect the employing party's assets (property, people, equipment, money, etc.) from a variety of hazards (such as crime, waste, damages, unsafe worker behavior, etc.) by enforcing preventative measures.