Inventors:
Andrew C. Capigatti - Winfield IL
John M. Zdenek - Riverside IL
Assignee:
Rockwell International Corporation - El Segundo CA
International Classification:
B41J 512
Abstract:
A keyboard assembly (12) of a telephonic console (14) having multiple modes of operation programmable at a user's site is shipped partly disassembled from a plurality of top mountable key caps with different designations for the same key location corresponding to different modes for permanent top mounting into vacant key holes (18, 20, 22, 24) at the customer site and is preassembled with other key cap assemblies that are installed at a manufacturing site from the underside (12') of the keyboard. The top mountable key cap assemblies (40) have a plurality of resilient arms (56, 58, 62, 64) with flanges (68) on the ends to block removal and wedge-shaped camming surfaces (70, 72) for camming engagement with the sides (50) of key holes to resiliently press the flanges (68) inwardly to enable insertion into the key hole (18, 20, 22, 24) mounted beneath the underside (12') of the keyboard (12) at which location they resiliently return to a locking position (FIG. 4 B) to block removal. A protuberance (48) around the key hole side wall (50) sealingly, slideably mates with a curtain wall (46) of the cap assembly (40) to block entry of fluids and dust into the interior of the keyboard assembly.