Self-restoring type current limiting device

Details Self-restoring type current limiting device Self-restoring type current limiting device

1975-12-17

1977-05-17

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Expansible or vaporizable fluid-actuated

337119, H01H 8700

Patent

active

040244881

ABSTRACT:
One electrode is rigidly fitted into a hollow metallic cylinder and the other electrode is coaxially fixed within the cylinder through a cylindrical insulation. An insulating disc is opposite to the cylindrical insulation to form them an annular arrow gap between them. The gap is filled with a self-restoring type current limiting material to normally form a current passageway between both electrodes. The current limiting material is caused to be first evaporated in a narrower portion of the gap in response to a flow of overcurrent through it.

REFERENCES:
patent: 3611041 (1971-10-01), Ito et al.
patent: 3644860 (1972-02-01), Yamagata et al.
patent: 3735309 (1973-05-01), Hurtle
patent: 3747040 (1973-07-01), Inoue
patent: 3753190 (1973-08-01), Ito et al.
patent: 3886511 (1975-05-01), Miyamoto et al.
patent: 3886511 (1975-05-01), Miyamoto et al.
patent: 3902150 (1975-08-01), Wada et al.
patent: 3909763 (1975-09-01), Soeno et al.

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