US 4,543,557 AGranted

Panel mountable fuse holder

AssigneeLittelfuse, Inc.

InventorRudolf K. Schaefer

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Abstract

A fuse holder includes a fuse carrier insertable into a passageway in a fuse holder body mountable in a vertical panel opening. The fuse carrier supports an active fuse in a U-shaped recess loosely holding the fuse in a horizontal position extending parallel to the panel. The fuse holder body includes a shoulder adjacent the front end thereof for preventing the complete withdrawal of the fuse carrier from said fuse holder body when the fuse carrier is pulled to the front of the body. The fuse carrier has pivot pins for pivotally engaging this shoulder so that the carrier drops into a position where it hangs downwardly from said fuse holder body where a fuse releasably held on the carrier is exposed for removal. The fuse holder body and fuse carrier have releasable interlocking parts which become interlocked when the fuse carrier has been pushed into a fully retracted position within the fuse holder body where the fuse terminals engage with terminal clips. The fuse carrier has a gripping handle which when depressed releases the interlocking parts to permit partial withdrawal of the fuse carrier from the fuse holder body. A spare fuse-receiving cavity is located behind the handle to support the spare fuse oriented parallel to the active fuse.

Claims20

Dependent claims

In a fuse holder comprising a main fuse holder body adapted to be mounted within an opening in a vertical panel and having a forwardly facing fuse and fuse carrier-receiving opening communicating with at least one passageway therein having a pair of fuse terminal-receiving clips aligned parallel to and located directly behind said fuse and fuse carrier-receiving opening, and a fuse carrier body insertable together with a fuse carried thereby into said passageway through said fuse and fuse carrier-receiving opening, the carrier having fuse receiving and retaining means for releasably holding an active fuse with spaced exposed terminals aligned parallel to said opening and positioned to engage with said fuse terminal-receiving clips when the carrier body is fully inserted within the fuse holder body, and said fuse holder body and fuse carrier body including complimentary guiding means for guiding said fuse carrier body for horizontal reciprocating movement within and into and out of said fuse holder body passageway through said fuse and fuse carrier-receiving opening while said fuse holder body is mounted in said panel opening, the improvement wherein said fuse holder body includes means in said fuse holder body passageway adjacent the front end thereof for preventing the complete separation of said fuse carrier body from said fuse holder body passageway when the fuse carrier body is pulled to the front of the fuse holder body, said fuse carrier body having pivot-forming means horizontally movable in the fuse holder body passageway with the rest of said carrier and pivotally engaging with the fuse holder body when said fuse carrier body is pulled into its forwardmost position where the carrier body can be pivoted into a position where it hangs downwardly from said fuse holder body while said pivot-forming means on the carrier body remains on said fuse holder body, said fuse-receiving and retaining means being then exposed to enable said active fuse to be removed from said fuse carrier and replaced by another fuse.

In a fuse holder comprising a main fuse holder body adapted to be mounted within an opening in a vertical panel and having a forwardly facing fuse carrier-receiving opening communicating with a passageway therein having a pair of fuse terminal-receiving clips aligned parallel to said opening, and a fuse carrier insertable into said passageway through said opening, the carrier having fuses receiving and retaining means for releasably holding an active fuse with spaced exposed terminals aligned parallel to said opening and positioned to engage with said fuse terminal-receiving clips when the carrier is fully inserted within the fuse holder body, said fuse holder body and fuse carrier including complimentary guiding means for guiding said fuse carrier for movement into and out of said fuse holder body through said opening, the improvement wherein the fuse holder body and fuse carrier have releasable interlocking means which become engaged when the fuse carrier has been pushed into a fully retracted position within the fuse holder body, said fuse carrier has a handle at the front end thereof which is still exposed when the fuse carrier is fully inserted within the fuse holder body, said releasable interlocking means releasing said fuse carrier to permit withdrawal of the fuse carrier from the fuse holder body when a force is applied to said handle in a direction parallel to said fuse holder body opening, said interlocking means includes depending lip means at the top of said fuse holder body opening which lip means forms rearwardly facing shoulder means, the fuse carrier having at the top thereof upward projecting means forming forwardly facing shoulder means adapted to abut said rearwardly facing shoulder means, and depressible resilient locking tongue means in the bottom of said fuse holder body which tongue means is engaged and depressed by a bottom portion of said fuse carrier as it is moved into a fully retracted position within said fuse holder body, the locking tongue means providing an upwardly and forwardly directed force against said fuse carrier which urges said forwardly facing shoulder means of the fuse carrier against the rearwardly facing shoulder means of said fuse holder body when the fuse carrier is in its fully inserted position within the fuse holder body, depression of said handle releasing said carrier from interlocking engagement with said fuse holder body at said shoulder means so that the fuse carrier can be withdrawn from said fuse holder body.

Dependencies are inferred from the claim text.