System and method of disabling an evacuation location device
First Claim
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1. A system comprising:
- a device that provides at least one output indicative of an outlet from a region, the device having an output disabling control port; and
an ambient condition detector, the detector having at least one alarm output indicative of the presence of a predetermined alarm condition, the alarm output is coupled to the control port to disable the device in the presence of the predetermined alarm condition.
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Abstract
An exit path indicating device incorporates at least a first port for receiving an alarm indicating signal. In normal operation upon receipt of the alarm indicating signal, the device outputs a visual or an audible, or both, indicator of the presence of an exit or egress path for use in evacuating the region. A second port disables the operation of the device. The second port can be coupled to a local sensor which provides an indication of a hazardous or alarm condition adjacent to or on the exit or egress path. If the sensor is indicating the presence of a hazardous or alarm condition, the indicating device can be disabled.
12 Citations
19 Claims
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1. A system comprising:
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a device that provides at least one output indicative of an outlet from a region, the device having an output disabling control port; and
an ambient condition detector, the detector having at least one alarm output indicative of the presence of a predetermined alarm condition, the alarm output is coupled to the control port to disable the device in the presence of the predetermined alarm condition. - View Dependent Claims (2, 3, 4)
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5. An alarm system comprising:
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a first plurality of ambient condition detectors coupled by a medium to first control circuits;
a second plurality of exit indicating output devices coupled by a second medium to second control circuits; and
a third plurality of ambient condition detectors, at least some of the detectors are coupled to respective ones of the output devices to disable operation thereof in response to a locally sensed predetermined condition. - View Dependent Claims (6, 7, 8, 9)
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10. A method comprising:
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determining that a hazardous condition is present in a region;
providing indicia indicative of at least one exit path from the region; and
determining if a hazardous condition is present in the vicinity of a portion of the exit path, and, responsive thereto, terminating the indicia. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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monitoring a region for the presence of a fire condition;
responsive to a fire condition, activating at least one of an audible or a visual fire indicator;
activating a plurality of fire exit indicators;
locally sensing fire indicia, in the vicinity of at least one of the fire exits, and determining the presence of fire related indicia sufficient to make the at least one exit unsuitable for use; and
responsive to the determined presence of fire related indicia, ceasing to activate at least selected fire exit indicators associated with the at least one fire exit.
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Specification