Patent US474340A successfully refreshed from Google Patents.
Patent US4040175A successfully refreshed from Google Patents.
US4040175A
Expired / Lapsed
US
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Method of making a miniature plug-in fuse with fragile fuse link
Assignee: Littelfuse Inc
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Filing: 1976-06-08
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Granted: 1977-08-09
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Expires: 1996-06-08
Abstract
Abstract A method comprises the steps of providing a blank containing a pair of laterally spaced coplanar terminal forming blade portions which are interconnected by a transverse rigid web, coplanar current carrying extensions thereof and an interconnecting relatively fragile fuse-forming link, inserting around the blank a housing made of insulating material with the current carrying extensions of the blank and the interconnecting fuse-forming link preferably within the housing and with the pair of terminal blade portions of the blank and the transverse web on the outside of the housing, securing said blank to the housing so the housing rigidly interconnects and supports the current carrying extensions, and blanking the exposed transverse web interconnecting the terminal blade portions.
Inventors
- 👤 Harold L. Williamson
- 👤 Avinash P. Aryamane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:13
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/0411; H01H85/0415; H01H85/0417; H01H69/00; H01H69/02; H01H2069/027; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49107; Y10T29/49789; Y10T29/49798
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
149 words
A method of making a plug-in fuse assembly comprising a plug-in element including a pair of terminals to be received by pressure clip terminals or the like, current carrying extensions extending from the inner end portions of the pair of terminals and a fuse-forming link interconnecting the current carrying extensions, said method comprising the step of providing a blank of fuse metal which is blanked to form a pair of spaced juxtaposed parallel terminals which are interconnected by a rigid web, current carrying longitudinal extensions of said terminals and a relatively weak fuse-forming link portion interconnecting said current carrying extensions, anchoring between said current carrying extensions a body of insulating material forming a rigid interconnection between said current carrying extensions, with the pair of terminals interconnected by the web on the outside of the body of insulating material, and blanking the exposed web of fuse metal interconnecting the terminals.
Claim 2
Independent Claim
149 words
A method of making a plug-in fuse assembly comprising a plug-in element including a pair of terminals to be received by pressure clip terminals or the like, current carrying extensions extending from the inner end portions of the pair of terminals and a fuse-forming link interconnecting the current carrying extensions, said method comprising the step of providing a blank of fuse metal which is blanked to form a pair of spaced juxtaposed parallel terminals which are interconnected by a rigid web, current carrying longitudinal extensions of said terminals and a relatively weak fuse-forming link portion interconnecting said current carrying extensions, anchoring between said current carrying extensions a body of insulating material forming a rigid interconnection between said current carrying extensions, with the pair of terminals interconnected by the web on the outside of the body of insulating material, and blanking the exposed web of fuse metal interconnecting the terminals.
Claim 3
Independent Claim
137 words
A method of making a plug-in fuse assembly comprising a plug-in element including a pair of terminals to be received by pressure clip terminals or the like, and a fuse-forming link forming at least part of an interconnection between the terminals, said method comprising the steps of providing a blank of fuse metal which is blanked to contain a pair of terminals which are interconnected by a rigid web, and a relatively weak fuse-forming link portion forming at least part of an interconnection between said terminals, anchoring across the portion of the blank interconnected by said fuse-forming link a body of insulating material forming a rigid interconnection therebetween, with the pair of terminals interconnected by the web on the outside of the body of the insulating material, and blanking the web of fuse metal interconnecting the terminals.
Claim 4
Independent Claim
137 words
A method of making a plug-in fuse assembly comprising a plug-in element including a pair of terminals to be received by pressure clip terminals or the like, and a fuse-forming link forming at least part of an interconnection between the terminals, said method comprising the steps of providing a blank of fuse metal which is blanked to contain a pair of terminals which are interconnected by a rigid web, and a relatively weak fuse-forming link portion forming at least part of an interconnection between said terminals, anchoring across the portion of the blank interconnected by said fuse-forming link a body of insulating material forming a rigid interconnection therebetween, with the pair of terminals interconnected by the web on the outside of the body of the insulating material, and blanking the web of fuse metal interconnecting the terminals.
Claim 5
Dependent Claim
44 words
The method as defined in claim 2 wherein the blank of fuse metal is initially provided with a portion of reduced thickness so that, when the blank is blanked, the interconnecting fuse-forming link portion of the blank is of less thickness than the terminals.
Claim 6
Dependent Claim
23 words
The method as defined in claim 3 wherein the portion of reduced thickness of the blank of fuse metal is reduced by milling.
Claim 7
Dependent Claim
26 words
The method as defined in claim 3 wherein the portion of reduced thickness of the blank of fuse metal is reduced by milling and subsequent squeezing.
Claim 8
Dependent Claim
37 words
The method as defined in claim 3 wherein the blank has interlock openings, and wherein the body of insulating material is staked into the interlock openings in the blank for securing the blank to the insulating body.
Claim 9
Dependent Claim
25 words
The method as defined in claim 6 wherein the insulating body is ultrasonically heated where it is staked into the interlock openings in the blank.
Claim 10
Independent Claim
243 words
A method of making a plug-in fuse assembly comprising a plug-in element having a pair of spaced terminals to be received by pressure clip terminals or the like, current carrying extensions at the inner end portions of the pair of terminals and a fuse link between said current carrying extensions, and a housing of insulating material, said method comprising the steps of providing a continuous strip of conductive material, sequentially advancing the continuous strip, blanking said continuous strip as after being sequentially advanced to provide at spaced intervals in said strip longitudinally interconnected blanks each containing a pair of spaced terminals which are interconnected by a rigid web of the strip and a spaced pair of current carrying extensions for the terminals, providing also a relatively weak fuse link between each pair of current carrying extensions, severing the end blanks from the strip, and applying over each end blank a housing of insulating material with the current carrying extensions and the fuse link of the end blank within the housing and with the pair of terminals of the end blank, which are interconnected by the transverse web of the strip, extending outwardly from the housing, said housing closely enveloping said current carrying extensions but being spaced from said first link securing said end blank to the housing, so the housing forms a rigid interconnection between said current carrying extensions, and blanking the transverse web of the strip interconnecting the terminal forming blade portions.
Claim 11
Independent Claim
243 words
A method of making a plug-in fuse assembly comprising a plug-in element having a pair of spaced terminals to be received by pressure clip terminals or the like, current carrying extensions at the inner end portions of the pair of terminals and a fuse link between said current carrying extensions, and a housing of insulating material, said method comprising the steps of providing a continuous strip of conductive material, sequentially advancing the continuous strip, blanking said continuous strip as after being sequentially advanced to provide at spaced intervals in said strip longitudinally interconnected blanks each containing a pair of spaced terminals which are interconnected by a rigid web of the strip and a spaced pair of current carrying extensions for the terminals, providing also a relatively weak fuse link between each pair of current carrying extensions, severing the end blanks from the strip, and applying over each end blank a housing of insulating material with the current carrying extensions and the fuse link of the end blank within the housing and with the pair of terminals of the end blank, which are interconnected by the transverse web of the strip, extending outwardly from the housing, said housing closely enveloping said current carrying extensions but being spaced from said first link securing said end blank to the housing, so the housing forms a rigid interconnection between said current carrying extensions, and blanking the transverse web of the strip interconnecting the terminal forming blade portions.
Claim 12
Dependent Claim
24 words
The method as defined in claim 8 wherein applying the housing over the end blank occurs before severing said end blank from the strip.
Claim 13
Dependent Claim
24 words
The method as defined in claim 9 wherein securing the end blank in the housing occurs before severing said end blank from the strip.
Claim 14
Independent Claim
174 words
The method of making a plug-in fuse assembly comprising a plug-in element including a pair of juxtaposed spaced parallel terminals to be received by pressure clip terminals or the like and current carrying extensions at the inner end portions of the current carrying extensions, said method comprising the steps of providing a continuous strip of conductive material, sequentially advancing the continuous strip, blanking said continuous strip to provide at spaced intervals in said strip longitudinally interconnected blanks each comprising a pair of juxtaposed spaced parallel terminals extending longitudinally along the strip and interconnected by a rigid web extending laterally across the strip and current carrying extensions of the terminals extending longitudinally along the strip, providing also relatively weak fuse-forming links extending between said current carrying extensions, severing end blanks from the strip and anchoring between the current carrying extensions of each blank rigid insulating means which forms a rigid interconnection therebetween, with the pair of terminals of each blank extending from the insulating means, and blanking the web of the strip interconnecting the terminals.
Claim 15
Independent Claim
174 words
The method of making a plug-in fuse assembly comprising a plug-in element including a pair of juxtaposed spaced parallel terminals to be received by pressure clip terminals or the like and current carrying extensions at the inner end portions of the current carrying extensions, said method comprising the steps of providing a continuous strip of conductive material, sequentially advancing the continuous strip, blanking said continuous strip to provide at spaced intervals in said strip longitudinally interconnected blanks each comprising a pair of juxtaposed spaced parallel terminals extending longitudinally along the strip and interconnected by a rigid web extending laterally across the strip and current carrying extensions of the terminals extending longitudinally along the strip, providing also relatively weak fuse-forming links extending between said current carrying extensions, severing end blanks from the strip and anchoring between the current carrying extensions of each blank rigid insulating means which forms a rigid interconnection therebetween, with the pair of terminals of each blank extending from the insulating means, and blanking the web of the strip interconnecting the terminals.
Claim 16
Dependent Claim
21 words
The method of claim 11 wherein said insulating means forms also a gripping surface and a housing enclosing the fuse-forming link.
Claim 17
Dependent Claim
47 words
The method of claim 11 wherein said continuous strip is made of fuse metal so that said fuse-forming link as well as said each pair of terminals are formed when the strip is blanked and each severed end blank forms a one piece all fuse metal body.
Claim 18
Dependent Claim
61 words
The method as defined in claim 13 wherein the sequentially advanced continuous strip of fuse metal before it is blanked is provided with portion of reduced thickness wherein the fuse-forming links are formed when the strip of fuse metal is blanked, so that the interconnecting fuse-forming links of the longitudinally interconnected blanks are of less thickness than the spaced terminals thereof.
Claim 19
Dependent Claim
28 words
The method as defined in claim 14 wherein the said provided reduced thickness in the strip of fuse metal is arranged at longitudinally spaced intervals in the strip.
Claim 20
Dependent Claim
46 words
The method as defined in claim 11 wherein the rigid insulating means is a single piece body having an opening at the inwardly facing side thereof, and said insulating body is inserted over said blank by way of the opening at the inwardly facing side thereof.
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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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |