Internally illuminated signs are customarily required by fire and building codes of various governmental agencies to identify an exit from a given area or to identify a direction to an exit. Such internally illuminated signs often include a housing with a stencil which has the letters forming the word "EXIT" cut into a stencil as a message. A directional indicating arrow is cut into the stencil at each end of the word "EXIT". The sign includes an illumination source internally of the housing to provide the requisite illumination for the message.
Each sign is typically mounted on a structure. A given sign may be mounted from a ceiling or supporting structure wherein the top of the sign is connected to the supporting structure. Accordingly, wiring to the interior of the sign and to light source enters the housing through a top wiring port. The sign may be mounted on a vertical wall so that one end of the sign is attached to the vertical wall and wiring to the interior of the sign and to light source enters the housing through a wiring port in an end wall of the sign. The sign may also be mounted with an opposite end against a vertical wall so that the wiring enters the housing through a wiring port in the other end of the housing.
In order to make a sign adaptable for mounting as a top mounted or a right or left mounted sign, the sign manufacturer typically provides wiring ports on the top and two opposed ends of the sign. It is desirable to provide a plate closure for the wiring ports which are not in use to close off the interior of the housing.
A manufacturer typically provides removably closure plates for wiring apertures which are not in use. One of the problems encountered in the field by workmen is that the closure plates are difficult to handle. Therefore, it is particularly desirable to provide an improved removable closure plate for a wiring port, which closure plate may be handled with facility in the field.