Safety device with delay

Details Safety device with delay Safety device with delay

1981-07-16

1983-01-18

Harris, George

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337296, H01H 8504

Patent

active

043694217

ABSTRACT:
A delayed safety device in which a meltable conductor engages two contacts. The meltable conductor is shielded by a non-conductive sleeve which serves also as touch protection. The meltable conductor is of a base metal having a coating of synthetic plastic which decomposes when heated and emits hydrochloric acid. The acid reacts with the conductor and reduces its cross-section. The coating protects the conductor against corrosion, and provides the conductor with switching-off characteristics present when the conductor is made of a noble metal.

REFERENCES:
patent: 3845439 (1974-10-01), Deelman
patent: 3869689 (1975-03-01), Kasamatu
patent: 3940728 (1976-02-01), Kosamatu et al.
patent: 4208645 (1980-06-01), Harmon et al.

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