Inductively compensated trigger circuit for a chemically augment

Details Inductively compensated trigger circuit for a chemically augment Inductively compensated trigger circuit for a chemically augment

1984-01-05

1986-02-25

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337401, H01H 8504, H01H 3776

Patent

active

045730326

ABSTRACT:
An inductively compensated trigger conductor for use in a chemically augmented fuse, of the type in which current flow through the fuse generates a magnetic field, employs at least one loop of electrically conductive material to inductively couple the trigger conductor to the magnetic field of the fuse. This inductive coupling increases the electrical inductance of the trigger circuit, and allows the fuse to be constructed so that the current division between the fuse conductor and the trigger conductor is constantly proportional, or at least more nearly so. When employed in a fuse which also includes a non-magnetic fuse support structure, a trigger device, and a means for chemically augmenting the separation of the fuse conductor into more than one segment during current interruption, the trigger circuit of this invention provides triggering action which is responsive only to the level of current flowing through the fuse, and not to a high rate of rise of current.

REFERENCES:
patent: 3705373 (1972-12-01), Cameron
patent: 3958206 (1976-05-01), Klint
patent: 4176385 (1979-11-01), Dethlefsen
patent: 4486734 (1984-12-01), Leach
patent: 4489301 (1984-12-01), Johnson et al.

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