US4099321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a miniature plug-in fuse
Assignee: Littelfuse Inc
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Filing: 1977-04-25
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Granted: 1978-07-11
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Expires: 1997-04-25
Abstract
Abstract A method for making a plug-in fuse assembly comprises the steps of providing a blank of fuse metal which is initially provided between opposite margins thereof with a continuous portion of reduced thickness, blanking the blank of fuse metal to form a pair of generally parallel laterally spaced confronting terminal blade portions which are interconnected by a transverse web, current carrying extensions of the terminal blade portions and an interconnecting fuse link portion formed by remaining sections of said portion of reduced thickness, inserting and anchoring an insulating body between said current carrying extensions of the blank with the pair of terminal blade portions of the blank, which are interconnected by the transverse web, extending outwardly from the insulating lid, and blanking the exposed transverse web interconnecting the terminal blade portions.
Inventors
- 👤 Avinash P. Aryamane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:26
CPC Classifications
H; H01; H01H; H01H69/00; H01H69/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49107; Y10T29/49789; Y10T29/49798
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
142 words
A method of making a plug-in fuse element comprising a plate-like body of the fuse metal having a pair of terminal blade portions to be received by pressure clip terminals in a mounting panel, current-carrying extensions at the inner end portions of the pair of terminal blade portions and a fuse link portion interconnecting the current-carrying extensions, said method comprising the steps of providing a blank of fuse metal which is initially provided between opposite margins thereof with a continuous band of reduced thickness, blanking said blank of fuse metal including at least said portion of reduced thickness to leave a pair of juxtaposed, spaced, terminal forming blade portions outside of said portion of reduced thickness, said fuse link portion formed in said portion of reduced thickness and said current-carrying extension of said terminal blade portions interconnected by said fuse link portion.
Claim 2
Independent Claim
142 words
A method of making a plug-in fuse element comprising a plate-like body of the fuse metal having a pair of terminal blade portions to be received by pressure clip terminals in a mounting panel, current-carrying extensions at the inner end portions of the pair of terminal blade portions and a fuse link portion interconnecting the current-carrying extensions, said method comprising the steps of providing a blank of fuse metal which is initially provided between opposite margins thereof with a continuous band of reduced thickness, blanking said blank of fuse metal including at least said portion of reduced thickness to leave a pair of juxtaposed, spaced, terminal forming blade portions outside of said portion of reduced thickness, said fuse link portion formed in said portion of reduced thickness and said current-carrying extension of said terminal blade portions interconnected by said fuse link portion.
Claim 3
Dependent Claim
21 words
The method as defined in claim 1 wherein said continuous band of reduced thickness is reduced by a step including milling.
Claim 4
Dependent Claim
33 words
The method of claim 1 wherein the continuous band of reduced thickness of the blank of fuse metal is reduced by a step including decreasing the thickness from both sides of the blank.
Claim 5
Dependent Claim
34 words
The method of claim 1 wherein the continuous band of reduced thickness of the blank of fuse metal is reduced by a step including decreasing the thickness from one side only of the blank.
Claim 6
Dependent Claim
31 words
The method of claim 1 wherein there is connected between said current-carrying extensions a body of insulation material forming a band grippable surface and a rigid interconnection between said current-carrying extensions.
Claim 7
Dependent Claim
58 words
The method of claim 1 wherein said continuous band of reduced thickness extending between said opposite margins of the blank is spaced inwardly of two other opposite margins of the blank so said blanking operation leaves at least the end portions of said current-carrying extensions formed from portions of the blank outside of said band of reduced thickness.
Claim 8
Dependent Claim
89 words
The method of claim 1 wherein said blanking operation leaves a web interconnecting said terminal blade portions, said web being of sufficient width to form a rigid interconnection between said terminal blade portions, securing between said current-carrying extensions insulating means forming a rigid interconnection therebetween with the pair of terminal blade portions of the blank, which are interconnected by the web extending outwardly from the insulating means, and blanking the exposed web of fuse metal interconnecting the terminal blade portions to complete the formation of the plug-in fuse assembly.
Claim 9
Dependent Claim
138 words
The method of claim 1 wherein a plurality of said plug-in fuse elements are made in a mass production operation comprising the steps of providing a continuous strip of fuse metal constituting a plurality of longitudinally spaced interconnected blank portions from each of which is to be formed said plug-in fuse element, said strip being provided throughout its length with a continuous portion of reduced thickness forming said continuous band of reduced thickness in each blank, sequentially advancing the continuous strip of fuse metal, blanking said continuous strip of fuse metal to provide in each of said blanks of the strip said pair of spaced terminal blade portions and current-carrying extension thereof and a fuse link portion interconnecting said current-carrying extensions thereof, and severing plug-in fuse elements from the end of the sequentially advanced strip of fuse metal.
Claim 10
Dependent Claim
90 words
The method of claim 8 wherein said blanking operation also forms for each longitudinally interconnected blank a web extending between said terminal forming blade portions, which web is of sufficient width to form a rigid interconnection between said terminal forming blade portions, securing between said current-carrying extensions of each end blank of the strip insulating means forming a rigid interconnection therebetween, with said terminal forming blade portions and web located externally of said insulating means, and blanking the exposed web of each end blank after application of said insulating means.
Claim 11
Dependent Claim
30 words
The method as defined in claim 8 wherein the continuous portion of reduced thickness throughout the length of the strip of fuse metal is reduced by a step including milling.
Claim 12
Dependent Claim
38 words
The method as defined in claim 8 wherein the continuous portion of reduced thickness throughout the length of the strip of fuse metal is reduced by a step including decreasing the thickness from both sides of the strip.
Claim 13
Dependent Claim
37 words
The method of claim 8 wherein the continuous portion of reduced thickness throughout the length of the strip of fuse metal is reduced by a step including decreasing the thickness from one side only of the strip.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |