| 摘要 |
In an electronic lock and alarm system, a sequence of digitally coded signals, specified by logically comparing input coded signals from a manually operated selector matrix and preset coded signals from a programmable code detector, is transmitted to a sequence recognizer computer for determining the validity of the coded sequence, and terminals such as door locks, ingnition switches, etc. are operated by the computer in one of several modes specified by a user discriminatingly operating the selector matrix. In a first mode, the terminals are opened for accessibility to the user. In a second mode, the terminals are closed for inaccessibility to the user and a main alarm in the immediate vicinity is energized. In an optional third mode, the terminals are opened for accessibility to the user and a silent alarm is energized at a remote location.
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