Lampholder

A lampholder for a screw-in lightbulb, comprising a body supporting two cable terminals for connection to an electrical supply, a contact carrier mounted on the body and defining a bulb receiving socket, the contact carrier being movable between first and second positions relative to the body in a direction parallel to the insertion direction of a bulb and supporting two terminals which connect an inserted bulb to the cable terminals when the carrier is in the first position but are spaced from the cable terminals when the carrier is in the second position, means for biasing the carrier to the second position, and an abutment secured to the body and extending into the carrier socket, the abutment being positioned so as to be contacted by a bulb screwed part-way into the carrier socket whereby the carrier is moved from the second to the first position when a bulb is screwed fully into the socket, wherein each cable terminal overlaps with a respective carrier terminal in the said direction and at least one terminal of each overlapping cable and carrier terminal pair is biased towards the other terminal of the pair, and an insulating support is provided with respect to each terminal pair which insulating support is fixed in position relative to one terminal of the pair and extends parallel to the said direction, the disposition and configuration of the insulating support and the terminal which moves relative to it being such that as the carrier moves from the first to the second position the said terminal which moves is moved onto the insulating support and out of contact with the other terminal.