Cooper Technologies, Inc.

Dan Rowton

Matthew Rain Darr

An opened fuse indicator includes a substantially transparent lens, a transparent base, and a dark colored backing layer. A sputtered metal layer is formed on the transparent base to provide a light-colored electrically conductive surface including a narrowed portion that forms a fuse link that is visible against the dark background of backing layer when viewed through the transparent lens. The conductive sputtered metal layer is electrically connected to a pair of fuse terminals to form a secondary fuse circuit in parallel with a main fuse circuit. Current directed through the secondary fuse circuit after the main circuit opens melts the sputtered metal layer so that it is no longer visible against the dark colored backing layer and the fuse is thereby indicated as opened.

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Wildwood, MO, United States of America

Dan Rowton