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    • 9. 发明授权
    • Method and apparatus for powering a security device
    • 为安全设备供电的方法和装置
    • US09171439B2
    • 2015-10-27
    • US13541246
    • 2012-07-03
    • Lawrence R. YeagerLee H. EckertGary Mark Shafer
    • Lawrence R. YeagerLee H. EckertGary Mark Shafer
    • G08B29/00G08B13/24G08B29/04
    • G08B13/2402G08B29/04
    • A security apparatus and method for protecting merchandise items is presented. In the preferred embodiment, a merchandise security device includes a housing with an access door that has an open position and a closed position, a primary power source, a secondary power source and alarm system. The alarm system determines when a voltage of the primary power source drops below a threshold value. When the voltage drops below the threshold value, the alarm system switches to the secondary power source for its power. When the alarm system is in a standby mode, it will not generate alarms when operating on the secondary power source. However, when the alarm system has not been placed into a standby mode, the alarm system will generate alarms when operating on the secondary power source and the access door is in the open position.
    • 提出了一种用于保护商品的安全装置和方法。 在优选实施例中,商品安全装置包括具有开门位置和关闭位置的入口门的外壳,主电源,次电源和报警系统。 报警系统确定主电源的电压何时下降到阈值以下。 当电压下降到阈值以下时,报警系统切换到二次电源供电。 当报警系统处于待机模式时,在二次电源上运行时不会产生报警。 但是,当报警系统尚未进入待机模式时,报警系统在二次电源上操作时会产生报警,而进入门处于打开位置。