(under subclass 507) Subject matter wherein a usually flanged or flat member covers the end of a barrel of an optical device in order to protect an unused lens, located within a barrel, from dust or from damage by impact with foreign objects.
SEE OR SEARCH THIS CLASS, SUBCLASS:
611+, for a shade to deflect unwanted light from a lens.
SEE OR SEARCH CLASS
15, Brushing, Scrubbing, and General Cleaning,
247, for a cover or cover holder.
439, Electrical Connectors, appropriate subclasses for movable or removable nonuse covering means.
