Abstract: A mask and mask assembly for use in a directory sign or the like. One or more masks are affixed to a backing panel, thereby defining a number of adjacent parallel channels for removably receiving message strips in the form of transparencies or the like. The mask comprises a substantially plane sheet member preferably flat on the front side, and on the back side having a number of raised lands longitudinally extending along the mask. The lands are laterally spaced apart from each other, and this facing defines the channels for receiving message strips. The masks have complementary overlapping lateral edges, so that a number of masks can be aligned side-to-side on a backing panel.

Abstract: A post sign having a message panel supported by one or more posts. Each post has an elongated channel connected to an outer side of the post by an elongated slot, and the message panel is mounted on the post or posts by an interconnecting support member which fits in the channel, leaving exposed an upper terminal portion of the channel and slot. The open upper end of the support member is covered by a spacer cap, and the open upper end of the post is covered by a post cap having a tab which fits into the open terminal portion of the channel and slot in the post. The caps thus render substantially invisible the open terminal portions of channel and slot.

Abstract: A suspended ceiling sign is provided for suspension within a vacant panel area, under a light fixture, in a suspended ceiling of a regular array of ceiling panels with each panel being peripherally supported within a suspended grid structure. The ceiling sign includes a hollow enclosure having an open top with a peripheral flange configured to engage the supporting grid structure around the vacant panel area. The enclosure has in one of its sidewalls a cutout portion with a translucent sign mounted therein. The bottom of the enclosure has a directed lighting aperture. Inside the enclosure, there is a truncated pyramidal baffle which is both light reflective and translucent. The pyramidal baffle is seated over the aperture in the enclosure bottom. The truncated top of the baffle may be either open or closed with a translucent material.