Safety lampholder

[JohnD]

have some table lamps where the BC pins do not make touch the supply contacts underneath until a bulb is fitted, it pushes the pins down against a spring. One of them has got loose and when you switch it on you have to press the lamp down or it won't come on. The lampholder incorporates a switch, and you can feel it pressing up against the lamp when you switch it on. The lamp base is not obstructed by the skirt (I fitted a wider one to make sure).

As it is in a ceramic base it will be awkward to unscrew and replace the lampholder, since it was screwed in (presumably) using some long, very thin tool through the small hole underneath.

before I start pulling it apart, or bin it, anyone done it before or got any suggs?

 

[EFLImpudence]

I think you'll find it quite easy.

After all, the ceramic has to be formed before assembly therefore it will disassemble easily.

 

[333rocky333]

Depends how small that hole is, sometimes twist a bit of wire on to the flex, so it dont fall through, remove the lampholder and pull it out through the hole fit new holder using your draw wire to pull it up again.

sometimes a 10mm starwasher or a 10mm flex clamp helps to keep the tension to tighten it

 

[flameport]

The lampholder will screw onto a length of hollow threaded rod, with the flex through the middle of it.

The usual method of assembly is to put a nut onto the threaded rod and secure in place with threadlock adhesive. The flex is passed through the ceramic base and then through the threaded rod, the flex is then used to guide the rod into the lamp base and up to the hole in the top.

Once the rod is in position, another nut or tube is screwed on to fix the hollow rod in position.
The actual lampholder is usually in 2 parts, the lower section screws onto the top of the threaded rod or tube previously fixed, the lampholder is then wired and placed into that, and the top section screws over it to secure the lampholder in place.

A plastic clamp is put onto the flex (or put a knot in it for the cheap option), and the flex is passed through the small hole in the side of the ceramic base. (The clamp/knot ends up inside the base, preventing the flex being pulled out of the lampholder.
Usually a label with felt or some other covering is put over the larger hole in the base.

Put a plug on, test and fix lampshade etc. as desired.