Time delay electric fuse

Details Time delay electric fuse Time delay electric fuse

1986-02-10

1987-07-14

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337166, 337293, H01H 8504

Patent

active

046805672

ABSTRACT:
A time delay fuse (10) includes a tubular housing (12) of insulative material with first and second open ends (14, 16). First and second metallic or electrically conductive ferrules (18, 20) are mounted on the first and second ends, respectively, of the tubular housing. A core (24) is positioned within the tubular housing (12) and affixed to the ferrules (18, 20) by electrically conductive material (26) such as solder. At least one short inner wire (28) extends along the core and is electrically and mechanically connected to the solder (26). A second wire (34) longer than the first wire (28) is spirally wound around the core (24) and the first inner wire (28). The second wire (34) includes first and second ends (36, 38) mechanically and electrically connected to the conductive material (26) such that the first and second wires are electrically parallel.

REFERENCES:
patent: 4517544 (1985-05-01), Spaunhorst

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