Back in the 60s, a couple of TV manufacturers used fusible links to protect the filament string. I don't remember the diameter only that we had a small roll of enameled wire of the correct diameter just for this purpose. A suitable size was cut, tinned, sleeved with a fabric tube and soldered between two terminals.

I don't recall why this was done as opposed to using a glass pigtail fuse or socketed fuse for that matter.

Any recollection of which manufacturers used that method of fusing?