Graphic display assembly

Claim 1

A combined graphic display assembly and annunciator system which accepts signals from transducers and which visually indicates both the occurrence and the source of any abnormality or event on a process diagram, said system comprising; a housing open at one end; a lamp nesting panel hingedly secured across said open end and formed of a latticework of interconnected strips defining a grid of lamp receiving compartments for receiving lamp assemblies; a plurality of lamp assemblies each including a lamp support having at least one spring clip formed from members driven towards one another by spring driving means, supporting means for supporting a lamp bulb from said lamp support, and a lamp bulb carried by said supporting means; each of said lamp assemblies engaging at least one selected strip of the nesting panel with the spring clip locked over the adjacent strip; a non-opaque process diagram; means for removably securing said process diagram over said panel comprising a transparent protective panel and fastening means for attaching said protective panel over said lamp nesting panel with said non-opaque process diagram sandwiched between said panels; and a plurality of plug-in annunciator logic circuits removably mounted within said housing, each of said circuits including an electrical energizing connection to the lamp-bulb in at least one of said lamp assemblies, and further each of said circuit including means for illuminating an associated lamp bulb in accordance with the relative magnitudes of said transducer signals and a corresponding set of preset reference signals.