National Service Industries, Inc.

Stephen T Smith

Andrew Edward Masters

Donald C O'Shea

Gary Stephen Andre

Lighting fixtures which feature indicia illuminated more uniformally and with greater brightness than in conventional lighting fixtures. LEDs which operate at a higher frequency/shorter wavelength, such as blue LEDs, emit light which causes the transformation material to reemit, reradiate or emit light at a lower frequency/longer wavelength with increased brightness and uniformity. In a preferred embodiment of the lighting fixtures, blue LEDs cause the transformation material to emit green light for bright and even illumination of indicia such as letters and chevrons in exit signs, and at a wavelength to which the human eye is serendipitously sensitive.

Lighting fixtures

Detachable chevron-shaped panels that fit within chevron-shaped apertures in the cover of an exit sign. The panels are dimensioned to fit integrally into the apertures in order to withstand years of stress, temperature changes, and wear and tear but continue to perform in a light-fast and reliable manner. Yet they may be easily installed from the exterior of the exit sign, with minimum risk that they will fall into the interior during installation. Surprisingly, the present devices permit such easy installation without the need to use conventional 'slide `n` snap' exit sign arrow fasteners that usually allow reliable installation but have proven to be destructive of a secure fit and light fastness. The panel accomplishes this by employing at least three tabs positioned in a certain manner about the perimeter of each wing of the panel which engage the (preferably bevelled) edge of the chevron-shaped aperture. The tabs are disposed in various quadrants around the centroid of each wing of the panel in order to create an integral fit of the long chevron wings to the cover and thus to reduce inadvertent detachment of the whole panel if a part of it is dislodged, or if the cover is deformed through heat or physical stress. Such positioning also provides multiple retention axes between tabs and creates lateral forces and bending moments, should any tab become dislodged, in order to continue securing the wing and the panel in place.

Direction indicator covers for emergency lighting systems

Emergency lighting housing/canopy interfacing structure. The structure employs one or more fasteners which may be positioned into place quickly and simply without the aid of tools in order to retain the housing and canopy securely together. Additional redundance members such as conventional snap-fitting barb members may additionally be employed to assist in installation and for extra safety. The present invention accordingly provides emergency lighting housing/canopy interfaces which allow simple, quick and reliable installation of emergency lighting fixtures, but which add additional structure to support the housing and the considerable load imparted by transformers, batteries and other structure within the housing. A preferred embodiment includes an elongated fastener which may be snapped and rotated into place into mounting posts formed on the canopy. The mounting posts, which protrude into the housing, are thus cammed into place against the housing in order to bias the housing and the canopy securely together.

Growing community of inventors

Conyers, GA, United States of America

Stephen T Smith