Automotive high current fuse

H - Electricity – 01 – H

Patent

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Details

H01H 85/08 (2006.01) H01H 69/02 (2006.01) H01H 85/044 (2006.01) H01H 85/055 (2006.01) H01H 85/175 (2006.01)

Patent

CA 2130455

(SEE FIGURE) A fuse for handling normal load currents substantially in excess of about 80 amps, the fuse comprising a metal portion formed of an integral piece of metal having outermost, spaced terminal-forming portions with bolt-anchoring holes therein and a fuse link-forming intermediate portion between the terminal-forming portions. The terminal-forming portions of the metal piece has a rectangular configuration having inner margins spaced from one another. The fuse link-forming portion of the metal piece has an S-shape with one face thereof being co-planar with one of the faces of the terminal-forming portions thereof. The thickness of the S-shaped fuse link is only a fraction of the thickness of the terminal thickness and has outermost legs respectively extending from the opposite sides of the innermost margins of the terminal-forming portions of the metal piece and a central link interconnecting the outermost legs. The central leg has two pairs of spaced notches between which a tin pellet is anchored in an aperture to reduce the melting temperature of the fuse link so that prolonged overload currents will open the fuse link.

Fusible destiné à des courants de charge normale dépassant nettement environ 80 ampères. Ce fusible comprend une partie métallique incorporée dans laquelle des sections en forme de bornes, espacées l'une de l'autre, présentent des trous de fixation de boulons, une section intermédiaire formant un élément fusible entre ces bornes. Les sections des bornes de la partie métallique sont rectangulaires, avec des marges intérieures espacées l'une de l'autre. L'élément fusible de la partie métallique est en S, et l'une de ses faces se situe dans le même plan que l'une des sections des bornes. L'épaisseur de cet élément fusible ne représente qu'une fraction de l'épaisseur de la borne et cet élément fusible comporte des branches extérieures partant respectivement des côtés opposés des marges les plus intérieures des bornes de la pièce métallique, un élément central reliant entre elles les branches extérieures. La branche centrale présente deux paires d'encoches espacées entre lesquelles est fixée dans une ouverture une pastille métallique permettant d'abaisser la température de fusion de l'élément fusible et de faire en sorte que les courants de surcharge provoquent son ouverture.

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