Protective housing for electric lamp, has ring with outlet opening for light and three locking elements spaced one hundred and twenty degrees apart

摘要

The light (1) has a circular housing (2), with an aperture (3), made in one piece or three arcuate portions. There are three locking elements spaced one hundred and twenty degrees apart which may have inclined cam faces and gaps to accommodate tags or flanges on the edges of a lamp reflector. Typically there may be three locking pins (5) spaced one hundred and twenty degrees apart on a ring (25).