Nipple for electrode joint

Details Nipple for electrode joint Nipple for electrode joint

1975-12-15

1977-02-08

Envall, Jr., R. N.

H05B 714

Patent

active

040073246

ABSTRACT:
An improved graphite nipple for connecting contiguous lengths of graphite furnace electrodes. The nipple is of the type having a reservoir for a thread locking pitch composition. The reservoir contains a heat-foamable, thermoplastic material including particulate pitch in a lignin sulfonate-based binder. The composition may be deposited into the reservoirs of the nipples by direct extrusion at ambient temperatures. When a nipple thus prepared is utilized in an electrode joint assembly, the high temperatures provided at the electrode joint foam the composition to expand it into adjacent thread spaces at the joint. Continued heating then carbonizes the composition to lock the joint.

REFERENCES:
patent: 2941829 (1960-06-01), Morelli
patent: 3303031 (1967-02-01), Shields

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