Patent ID: 8599018
Filing Date: 2013-12-03
Classification: G08B,Y10T

Abstract:
1. An alarm system for providing an indication of time elapsed since an intrusion into an enclosed space, the enclosed space being surrounded by an outer perimeter zone, the indication enabling an observer situated outside the outer perimeter zone to learn at least approximately how much time has elapsed since the intrusion, the alarm system comprising: at least one interior sensor being located within an enclosed space, the at least one sensor configured to generate an intrusion time signal in response to an intrusion into the enclosed space; an indicator light responsive to the intrusion time signal, the indicator light being located outside the enclosed space and within an outer perimeter zone of the enclosed space, the indicator light being configured to emit light upon receiving the intrusion time signal, the emitted light being visible from outside the outer perimeter zone of the enclosed space, thereby rendering the enclosed space readily identified as having been intruded upon by an observer situated outside a perimeter zone of the enclosed space; and a light changing system responsive to the intrusion time signal, and in communication with the indicator light, the light changing system being configured to change the emitted light over time so as to indicate at least approximately how much time has elapsed since the intrusion.