Abstract: A device for projecting an escape path to direct evacuation from a fire includes a plurality of laser diode projectors secured within a housing and aimed to project successive rays or images along a predetermined escape path. The images may comprise arrow indicators, graphics, or alphanumeric indicators. The laser beams are emitted through the same window in the housing to minimize heat infiltration into the housing. The laser diodes are triggered by an alarm condition, such as direct actuation by a smoke sensor, IR detector, or the like, or secondary actuation in response to the audio alarm signal of a primary fire alarm. For actuation by a primary alarm system, a microphone input is amplified and fed to a microprocessor. The microprocessor is programmed to digitally filter and process the signal to determine the presence of a primary alarm signal, and actuate a fire escape path illuminating module.

Abstract: A voice-activated location system comprising a transmitter unit and a receiver unit coupled to a frequently misplaced item. The transmitter unit receives an audible sound, generates an analog signal corresponding to the audible sound and transmits a coded radio frequency ("RF") carrier signal upon recognizing that the audible sound represents a voice command. The carrier receives the coded RF carrier signal, decodes the coded RF carrier signal to produce a serial bit stream. The serial bit stream is compared with a digital code associated with the receiver unit. If there is a match, the receiver unit emits an audible sound for a predetermined time period to assist in locating the item.