Lampshade with rectangular frame - has two long and two short sides with corner joints formed by interlocking tongues

摘要

The lamp framework is designed to hold a ceiling light fixture and consists of a lamp base (1) over which fits a frame (2) of four separate members with two long sides (3) and two short sides (4). The corner joints of the frame are made by 45 deg. inwardly folded members which are connected together by connecting tongues which are pulled together. Side members are held in position by short slotted taps which have corresponding members on the adjacent sides.