56 results about "Exit sign" patented technology

Electronic self-test and/or self-diagnostic systems particularly useful with emergency lighting fixtures, including exit signage having light emitting diodes as light sources and unit emergency fixtures powered with lead-acid batteries, the systems perform testing and diagnostic functions on the circuitry, power supply, charger and lamping of such fixtures either by manual or automatic initiation. Testing functions are provided through use of a programmable microprocessor, the diagnostic circuitry not only monitoring operation of charger/transfer circuitry but also controlling the charger/transfer circuitry to enable alternate strategies for alleviation of a given failure. In emergency mode of a light emitting diode exit sign, a microprocessor-controlled two-stage inverter is employed not only to power the LED light source, but also to efficiently power the microprocessor. Power to the microprocessor is controlled by the microprocessor itself and can therefore be discontinued after appropriate operation until mains power is restored, thereby effectively reducing power consumption to zero. System operation can be flexibly configured through use of a two-wire serial link between modular elements of the system. Incandescent emergency unit fixtures due to high drain rates and output loads require emergency mode operation through use of lead-acid batteries, thereby requiring voltage controlled charging and relay transfer, the self-test and/or self-diagnostic circuitry of the invention used with emergency unit fixtures thus differing in various respects from the circuitry employed for the LED exit signage fixtures and primarily in the need to measure both charge and discharge currents, the circuitry having a larger dynamic range in addition to a capability of measuring both positive and negative currents.

A monitoring system has integrated exit signs, which preferably have electroluminescent elements. The signs connect to internal wiring of a building, but local power sources can provide emergency power if building power is lost. Controllers on the signs communicate with a central workstation using building wiring and/or wireless communication. The controllers have one or more automated features for monitoring operation of the exit signs and the surrounding environment. These automated components, including an intensity sensor, an ambient light sensor, a temperature sensor, a smoke detector, a camera, a speaker, a microphone, a motion detector, an RFID detector, and the like. Because the signs are widely distributed throughout the building, operators can get detailed information of the building environment, security, fire, smoke, temperature, etc. The exit signs can store this information locally and can communicate useful information using a communication link to the central workstation.

An exit sign comprising a housing and a plurality of red and green color LEDs having the capability of being selectively activated to produce either red light or green light. The plurality of LEDs are mounted in a mutual lighting association in the housing. A switch is manually operable to selectively activate the plurality of red color LEDs to produce the red light and in the alternative, to selectively activate of the plurality of the green color LEDs to produce the green light. Means for passing light from the selected red light or selected green light in the form of indicia symbolizing an exit enables viewing by an observer, such means include a stencil having four independent letters forming the word EXIT. DC circuitry is in operative electrical connection with the plurality of LEDs. A source of DC electrical power activates the DC circuitry. The plurality of LEDs can be monochrome red LEDs and monochrome green LEDs or in the alternative, the plurality of LEDs can be bicolor LEDs having the capability of producing red light or green light. Red light and green light can be simultaneously emitted so as to produce yellow light. An emergency power backup battery is connected to the plurality of color LEDS. Means for producing emergency light is optional.

The invention discloses an on-site hot smoke test equipment and method for subway stations and inter-station tunnels. The system comprises ignition source systems, data acquisition systems, and a data processing system, wherein the ignition source systems are arranged in the subway stations and the tunnels to simulate a fire scene; the data acquisition systems are arranged in the platforms and the concourses of the subway stations, the station tunnels and the inter-station tunnel to collect the following information in the fire scene, such as temperatures, gas concentrations, gas velocities, images, thermal images, smoke heights and system linked time; and the data processing system is connected with the data acquisition systems and processes the data information collected by the data acquisition systems, obtains the evaluation indicative data about work effects, reliability and linkage conditions of the fire detection and warning systems, the ventilation and smoke removal systems, the emergency lighting systems, the exit passageways and the exit signs in the platforms and the concourses of the subway stations and the inter-station tunnels, and judges whether the individual fire fighting systems can ensure the safe escape of passengers in the fire accident. The on-site hot smoke test equipment and method can provide reasonable and correct scientific evidences for subway construction, system debugging and transport safety.

Emergency signs and combination emergency signs and emergency lights wherein the combination signs are compact for shipment and are energy efficient using first interior light emitting diodes, powered by an AC power source, for illumination of messages formed in at least one side wall of the emergency signs and having at least one emergency light emitting diode lamp for providing emergency lighting in the event of AC power failure and wherein the at least one emergency light emitting diode lamp, in some embodiments, is selectively deployable and adjustable relative to the signs, and in others, is fixedly mounted relative to the signs.

A recognition system recognizes and prevents the unlawful use of a firearm. The present invention also provides a means for tracking and tracing the history of a firearm movement and registered ownership. The recognition system may include a variety of scanning devices that may be adapted to scan for a firearm and/or may scan for a special component formed into the firearm material. The scanning devices may be made visible to people to act as a deterrent, or may be hidden in various everyday items, such as in exit signs, advertisement displays and the like. The scanning devices may not only detect firearms, but other items that may be restricted in their carry, such as knives, narcotics, explosives, or the like.

Canopy mounting devices that cover junction boxes of various configurations and provide a pleasing, finished appearance to a resulting installation are disclosed. Certain embodiments of a canopy mounting device include a universal mounting plate integrally formed with a connector of the mounting device such that direct mounting to junction boxes of different configurations is possible. The mounting devices accommodate not only appropriate mountings of junction boxes within ceilings or walls but also inappropriate mountings, such as when junction boxes are recessed too deeply within a ceiling or wall or mounted with junction box edges extending outwardly from the ceiling or wall.

An emergency lighting fixture combining the functions of an illuminated sign such as an exit sign and an emergency lighting unit integrated into one housing onto which one or more emergency lights can be mounted at predetermined locations of the housing, the combined emergency lighting structure providing both exit location information and ambient emergency lighting in a single cooperatively operating device.

An exit sign for use in hazardous atmospheres including an explosion-proof housing and a sign panel with indicia thereon. The housing prevents the ignition of gas or vapor surrounding the enclosure due to sparks, flashes or an explosion of the gas or vapor within the enclosure by providing an ample heat sink surface along any flame path to cool gases escaping from the housing. The sign panel preferably includes one or more transparent sheets which are edge lit from a light source contained in the explosion-proof housing that shines through a window in the housing into the top edge of the sign panel to illuminate the face(s) and the indicia thereon. The light source utilizes a number of long life light emitting diodes. The exit sign preferably includes a sealed maintenance-fee rechargeable battery for powering the light source when externally supplied power to the exit sign is absent.

An exit device includes an electroluminescent exit sign assembly, preferably mounted on a push rail actuator of the exit device. An electroluminescent illuminator, an opaque material and a transparent protective cover form the electroluminescent sign assembly. The push rail actuator operates a latch mechanism and opens an associated exit door when pressure is applied. An inverter may be located within the exit device to power the electroluminescent illuminator with an AC or voltage. The electroluminescent sign assembly is preferably removable for repair or replacement without removing the exit device from the exit door and is located within a surface cavity in an electrically insulating touchpad on the exit device actuator. Additional transparent nonconductive material surrounds the electroluminescent material to provide further electrical insulation.

An exit sign comprising a housing and a plurality of LEDs that activates to produce yellow color light. The plurality of LEDs are mounted in the housing. Means for passing light from the plurality of LEDs in the form of indicia symbolizing an exit enables viewing by an observer, such means includes a stencil having four independent letters forming the word EXIT. DC circuitry is in operative electrical connection with the plurality of LEDs. A source of AC electrical power activates the DC circuitry. The plurality of LEDs can be both red color output LEDs and green color output LEDs, or the plurality of LEDs can be bicolor red and green LEDs having the capability of producing both red light and green light. The red light and green light are additively mixed to produce yellow light. In the alternative, the plurality of LEDs can be yellow color output LEDs or the plurality of LEDs can be white color output LEDs. The color light from the plurality of LEDs pass through either a red color diffusion filter to produce red light indicia, or a green color diffusion filter to produce green light indicia. An emergency power backup battery is connected to the plurality of LEDs. Means for producing emergency light is optional.

Described is a dynamic emergency exit sign comprising one or more pictograms and at least one light source for accentuating one or more of the one or more pictograms either singly or in combination, wherein at least one light source is controlled by signals from evacuation computer modelling software to assist occupants egress in emergency or other critical situations.

A combination exit sign and emergency lighting fixture includes a sign fixture and an emergency light fixture. The sign fixture includes a sign housing having a perimetrical wall defining opposed spaced apart faces. The perimetrical wall supports at at least one face an illuminable sign. The emergency lighting fixture includes at least one illuminative emergency light attached to the perimetrical wall. A light housing is sealingly secured to the perimetrical wall and encloses the emergency light. The light housing has a transverse extent not exceeding the outermost transverse extent of the opposed spaced apart spaces. Illumination means is provided within the sign housing for illuminating the sign and the emergency light.

The invention relates to a method for preparing a long afterglow rare earth phosphor and polymer composite material, which comprises the following steps: blending, extruding and pelleting various polymer materials such as high-density polyethylene (HDPE), low-density polyethylene (LDPE) and ethylene vinyl acetate (EVA), green long afterglow rare earth phosphor and other related addition agents with a double screw to prepare granules of the long afterglow rare earth phosphor and polymer composite material; and preparing various luminescent products by an injection molding or mould pressing method. The method effectively solves bottleneck problems of dispersion, adhesion, bright color, plasticization and the like in the process to prepare the environment-friendly material with long afterglow time, high luminance, good stability, and no toxicity or radiation. The performance of the material is that: the material has long fluorescent lifetime which is longer than 24 hours; the adhesive force is first grade; and the impact strength is 43kg/cm. The material can replace the traditional ZnS luminescent material, and can be applied to various safety exit signs in airplanes, ships, underground markets and the like, fir-fighting apparatus signs, public traffic stop boards, various rating plates, films, tapes, handicraft articles, ornaments, toys and the like.

A cold light emergency lamp, a cold light exit sign, a centralized control box of cold light emergency lamp and cold light exit sign, and an apparatus integrated with cold light emergency lamp and cold light exit sign are disclosed. A plurality of sockets are arranged on the body of the centralized control box for being inserted by power line plugs of a plurality of groups of cold light exit signs and cold light emergency lamps. The centralized control box further comprises: a battery; a micro control unit connected to the battery for detecting the battery regularly; a cold light element drive circuit connected to the micro control unit for performing drive under the control of the micro control unit. Each of the cold light emergency lamps and the cold light exit signs has a power line plug for inserting in a socket of the centralized control box so that the cold light emergency lamps and the cold light exit signs are electrically connected to the cold light element drive circuit. According to the present invention, a plurality of groups of cold light emergency lamps and cold light exit signs are separably integrated into a centralized control box so that not only the plurality of groups of cold light emergency lamps and cold light exit signs can be made a centralized control but also the volumes of the cold light emergency lamps and cold light exit signs can be greatly reduced and the cold light emergency lamps and cold light exit signs may be flexibly placed on any position in any angle according to emergent site.

The invention discloses a mobile terminal-based indoor positioning method and system for WIFI and visual information. The method comprises the following steps of (S1) collecting a WIFI signal at the position near each interior fire safety exit sign, simultaneously shooting an image of each fire safety exit sign and measuring a coordinate of each exit sign in a plane map; (S2) analyzing WIFI information and image information, obtaining an WIFI signal address and signal strength of each exit sign, calculating an SURF feature descriptor of the corresponding image and a homography between a three-dimensional coordinate system and a world coordinate system, and storing a signal strength list, the SURF feature descriptor and the homography of each position into a map database; and (S3) finding out the position with the highest matching degree from the map database according to the signal strength list and the SURF feature descriptor of the current position and determining a specific position of a user by combining the homography of a map image of the corresponding position and a positioning error experience value. A signal base station does not need to be added and the indoor positioning accuracy is high.

An exit sign comprising a housing, a plurality of green color LEDs and red color LEDs or bicolor green and red color LEDs positioned in the housing for emitting both a green color light and a red color light with a filter holder for holding a selected green color filter or a selected red color filter for passing the selected green color light or selected red color light to a stencil having openings for passing the selected green color light or selected red color light to an observer. Yellow color LEDs can be alternatively positioned in the housing for emitting yellow color light comprising both green color light and red color light. White color LEDs can also be alternatively positioned in the housing for emitting white color light also comprising both green color light and red color light.