Holder for an electrical safety fuse

• US 5,561,409 A
• Filed: 03/15/1995
• Issued: 10/01/1996
• Est. Priority Date: 03/28/1994
• Status: Expired due to Term

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Heitzig, Claus-Peter, Rapp, Lothar
• Primary Examiner(s): Picard, Leo P.
• Assistant Examiner(s): Gandhi, Jayprakash N.
• Application Number:
  US08/404,447
• Time in Patent Office: 566 Days
• Field of Search: 337/186, 337/187, 337/194, 337/195, 361/103-104, 439/250, 439/621-622
• US Class Current: 337/186
• CPC Class Codes: H01H 85/542 the intermediate or auxiliary part being provided with bayonet-type locking means

Abstract

A holder is provided for a cylindrical electrical safety fuse having conductive end caps. A hollow housing receives the fuse therein through a front side which is closeable with a closure cap. A compression spring at a back end of the housing biases the fuse against a conductive metal inner cap disposed interiorly of the end cap. The inner cap has a radially extending contact tab. A terminal pin is provided to conductively engage the contact tab. The terminal pin has a contact portion with a perpendicularly-extending base, a cantilevered front leg extending from and overlying the base, and a cantilevered spring leg extending from a second end of the base so that the spring leg is disposed intermediately between the front leg and the base and also overlies the base. A clamp slot is defined between the front leg and the spring leg to form an electrical contact with the contact tab.

Claims

1. A holder for an electrical fuse, the fuse being cylindrical and having opposite conductive end caps, said holder comprising:

a tubular housing within which said fuse generally resides, the housing having a front end and a back end;

a closure cap securable to the front side of the housing, the closure cap having an inner metal cap with a radially extending contact tab;

a compression spring disposed within the housing at the back end thereof, the spring contacting a conductive end cap of the fuse to bias an opposite conductive end cap of the fuse against the inner metal cap;

a first terminal pin in electrical contact with the spring, a portion of the first terminal pin extending from the housing; and

a second terminal pin disposed in the housing, the second terminal pin having;

a terminal portion extending from the back end of the housing; and

a contact portion proximal to the closure cap, the contact portion including an elongated base, a cantilevered front leg extending from a first end of said base and overlying said base, and a cantilevered spring leg extending from a second end of said base, said spring leg extending intermediately between said front leg and said base, said spring leg overlying said base, a clamp slot being defined between said front leg and said spring leg to receive said contact tab and form an electrical contact connection therewith.

2. The holder according to claim 1, wherein the spring leg is tapered to form a lead-in bevel for receiving the contact tab between the spring leg and the front leg.

3. The holder according to claim 1, wherein the second terminal pin is narrowed to approximately one-half thickness in a region between said base and said front leg.