Fuse with aluminum fuse element having tin-plated copper terminals
AssigneeCanadian General Electric Company Limited
InventorJohn F. Howard
Life of this patent
Estimating the term…
Abstract
A fuse element is a ribbon of aluminum or aluminum alloy having a terminal at each end of the ribbon. Each terminal is made of copper sheet material having a portion that is tin plated. The tin plated portion is folded over the end of the ribbon to contact both sides and is welded to the ribbon to form a connection capable of carrying short circuit currents and able to withstand repeated temperature changes. Preferably the weld consists of three side-by-side spot welds extending on either side of the ribbon to the respective tin plated terminal portion.
Claims4
A fuse element for a current limiting fuse, comprising:
- a ribbon of aluminum or aluminum alloy, and
- a terminal at each end of said ribbon of copper sheet material having at least a portion thereof tin plated, said portion being bent over a respective end of said ribbon with the tin plated surface thereof contacting both sides of said respective end and being welded to said end,
- said portion of each said terminal being welded to said respective end by at least one spot weld forming a welded portion between said respective end and the respective portion on either side of said end,
- said ribbon having spaced along the length thereof a plurality of pairs of larger and smaller holes, each of said pairs of larger holes being defined by edges which are closely adjacent at the centerline of said ribbon,
- the pairs of smaller and larger holes alternating along the length of the ribbon.
A fuse element for a current limiting fuse, comprising:
- a ribbon of aluminum or aluminum alloy, and
- a terminal at each end of said ribbon of copper sheet material having at least a portion thereof tin plated, said portion being bent over a respective end of said ribbon with the tin plated surface thereof contacting both sides of said respective end and being welded to said end,
- said portion of each said terminal being welded to said respective end by at least one spot weld forming a welded portion between said respective end and the respective portion on either side of said end,
- said ribbon having spaced along the length thereof a plurality of pairs of larger and smaller holes, each of said pairs of larger holes being defined by edges which are closely adjacent at the centerline of said ribbon,
- pairs of smaller and larger holes alternating in some regions of the ribbon and other regions having a pair of smaller holes alternating with two spaced apart pairs of larger holes.
Dependencies are inferred from the claim text.