| 摘要 |
<p>An electric fuse (10) is comprised of a tubular fuse casing (12) formed of an electrically insulating material. A first conductive component (2) is attached to a first end of the casing (12) and a second conductive component (3) is attached to a second end of the casing (12). A first conductive path is formed through the tube (12) between the first (2) and second (3) conductive components. The conductive path includes a fusible element (20) having a first resistance. A second conductive path (44) is formed along the exterior of the tubular fuse casing (12). The second conductive path (44) is in parallel to the first conductive path (20) and has a second resistance greater than the first resistance. The second conductive path (44) includes an indicator component (40). The indicator component (40) is comprised of a first layer (42) comprised of a colored material, and a second layer (44) comprised of an electrically conductive material deposited onto the first layer (42). The second layer (44) has a region (44a) of increased resistance. An inner cavity (72) is located above the region (44a) of increased resistance on the second layer (44). A third layer (66) comprised of a transparent, polymeric material covers the cavity (72) and the first (42) and second (44) layers.</p> |
