Alarm system for computers and the like

摘要: Several modular circuits are releasably connected to one another and with the plug which supplies AC power a computer or like. A first circuit rectifies voltage applies DC side of motion sensing circuit, opposite is third containing portable, supply. The include an electrically operated alarm, electronic valve, normally maintains alarm deenergized. contains capacitor in parallel mercury switch which, when subjected sudden movement, closes switches valve conducting mode, thereby energizing provided equipment has been unplugged so that removed from circuit. delays deenergization after recloses; by supply prolongs life portable (battery).