An improved visual indicator device

TL;DR: In this article, an indicator comprises a frame 2 having opposed channels for slidably receiving a number of perforated panels 1 removably carrying channel-shaped members 14 which in turn slidably receive perforation strips 16 remOVably carrying indicating pegs 17.

Abstract: 816,858. Signs. NATIONAL RESEARCH DEVELOPMENT CORPORATION. June 8, 1956 [March 11, 1955; Sept. 15, 1955], Nos. 7192/55 and 26420/55. Class 3(2) An indicator comprises a frame 2 having opposed channels for slidably receiving a number of perforated panels 1 removably carrying channel-shaped members 14 which in turn slidably receive perforated strips 16 removably carrying indicating pegs 17. A number of units 14, 16 may be carried by a like device of larger dimensions (see Figs. 6 and 7, not shown). The indicator is provided with panels 22, 23 which stand proud of the frame 2 in order to permit movement of the panels 1, the panel 23 being hinged to the frame 2 and the panel 22 being fixed thereto or slidably mounted thereon. The indicator is also provided with movable pointers. 31, U-shaped pegs for joining strips 15. together and leaf-springs for locating the strips in position when they are adapted to slide vertically.