(under subclass 543) Subject matter where the means for mounting includes a threaded member for screw attachment and this can be used to mount the curved refracting surface that is located in fron of the reflecting surface.
(1) Note. Reflector buttons that simply reflect light falling on them, autocollimating, without the creation of a single image of an object at a focal point are classified in this subclass rather than the lens subclasses of this class.
(2) Note. Although reflector buttons are often called "lenses" they are not classified in the lens subclasses of this class unless they create a single image of an object at a focal point.
SEE OR SEARCH CLASS
411, Expanded, Threaded, Driven, Headed, Tool-Deformed, or Lock-Threaded Fastener,
81+, for threaded fastener and means for restricting rotation thereof relative to coacting substructure.
