초록 ▼

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 m

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.

대표청구항 ▼

An illuminated exit sign for providing guidance to the egress of a building, the exit sign comprising: a. a housing; b. at least one lamp within the housing; c. a cover removably attached to the housing and which defines a front surface facing outwardly from the sign and a reverse surface and compri

An illuminated exit sign for providing guidance to the egress of a building, the exit sign comprising: a. a housing; b. at least one lamp within the housing; c. a cover removably attached to the housing and which defines a front surface facing outwardly from the sign and a reverse surface and comprising: i. means for forming a message; ii. a plurality of chevron-shaped apertures, each having a perimeter, at least two of which are located on the front surface of the cover and adjacent the message, each of which comprises: (a) a first and second section that join to form a chevron shape; and (b) when viewed in cross section, an aperture bevel extending from the front surface at least partially to the reverse surface to form an edge for capturing portions of an insert; and d. a detachable insert, for covering one of the chevron-shaped apertures, comprising: i. a chevron-shaped baseplate, sized substantially the same as at least one of the chevron-shaped apertures, containing an anterior surface and a posterior surface and featuring two wings, each of which has a centroid and a leading edge and a trailing edge; ii. a bevel, extending at least partially from the anterior surface to the posterior surface of the baseplate and surrounding the baseplate and corresponding in orientation to the aperture bevel; and iii. for each wing, at least three identical tabs dispersed about each wing, each of which when viewed in cross section alike extend from the bevel to a protrusion, and then back to the posterior side of the baseplate, thus forming a groove in which the edge of the aperture may be captured in a manner to allow the tabs securing the wing to the cover to occupy at least two non-adjacent quadrants about the centroid of each wing, the tabs forming a plurality of retention axes, each retention axis extending between a portion of one tab and a portion of another tab, the tabs thereby adapted to resist removal of the insert from the cover.