Dual-size lamp socket for light fitting has stepped internal diameter for receiving light bulbs with 2 different size screw fittings

摘要

The lamp socket has a base part (1,3) provided with a contact (4) for cooperating with the central contact (5) of a light bulb screw fitting and a contact (7) cooperating with a socket sleeve contact (8,9), the socket sleeve (2) provided with 2 stages (A,B) of different diameter and fitted into the base in 2 alternate positions for use with a light bulb having a large or small size screw fitting.