SCREW-DOWN STRUCTURE Russian patent published in 2011 - IPC H05B7/10 F27B3/10 

FIELD: metallurgy.

SUBSTANCE: device is equipped with removable cover in form of cylinder cartridge with hole in bottom part. A flexible element is made in form of a corrugated disk and is pressure tight connected with an internal side of the case. A moveable element is located inside a cavity formed with the flexible element and the removable cover and has a concave base resting on the flexible element. A stop rod of smaller diametre transfers hold-down force on a contact flange to an electrode passing through the hole in the removable cover. A mechanism of return is positioned around the rod of the moveable element and rests on the bottom section of the removable cover.

EFFECT: reduced geometric sizes of device, increased service life and reduced pressure of working substance.

1 dwg