GB1476870A - Fuse element - Google Patents
Fuse elementInfo
- Publication number
- GB1476870A GB1476870A GB2108875A GB2108875A GB1476870A GB 1476870 A GB1476870 A GB 1476870A GB 2108875 A GB2108875 A GB 2108875A GB 2108875 A GB2108875 A GB 2108875A GB 1476870 A GB1476870 A GB 1476870A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trough
- zone
- reduced
- alloy
- zones
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 229910000978 Pb alloy Inorganic materials 0.000 abstract 1
- 229910001128 Sn alloy Inorganic materials 0.000 abstract 1
- 239000010425 asbestos Substances 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000002085 persistent effect Effects 0.000 abstract 1
- 238000010791 quenching Methods 0.000 abstract 1
- 229910052895 riebeckite Inorganic materials 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 238000004857 zone melting Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
- H01H85/10—Fusible members characterised by the shape or form of the fusible member with constriction for localised fusing
Landscapes
- Fuses (AREA)
Abstract
1476870 Fuses DORMAN SMITH FUSES Ltd 29 April 1976 [17 May 1975] 21088/75 Heading H2G A fuse element comprises a metal strip made of for example silver or copper formed with a trough containing a low melting point metal, for example tin or tin/lead alloy, wherein the strip is reduced in section, to create a zone of relatively high resistance, immediately adjacent the trough. As shown the high resistance zones 13 are formed by forming notches. Further notched zones 15, 16 are provided further from the trough. A cartridge fuse (Fig. 3) may contain one or more elements 17 disposed in a ceramic tube 18 filled with arc-quenching silica sand 19, the tube being closed at each end by a pair of end caps 20, 21, enclosing an asbestos disc. Various modifications of the element are disclosed including forming the zone of reduced section by providing holes (Figs. 7 and 8, not shown), or a surface channel (Figs. 9 and 10, not shown). The trough may be rectangular (Figs. 11 and 12, not shown), and the alloy may be a rod in a semicircular trough (Figs. 13 and 14, not shown). In a further modification a reduced-section zone is bounded by a pair of troughs (Figs. 15 and 16, not shown). The arrangement provides for short-time current surges to be withstood, the heat developed in the reduced zone melting the alloy and thereby delaying fusing, whilst more persistent overloads melt the fuse. The remote zones 15, 16, respond to short-circuit overloads
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2108875A GB1476870A (en) | 1975-05-17 | 1975-05-17 | Fuse element |
| CA252,685A CA1038427A (en) | 1975-05-17 | 1976-05-17 | Fuse element for a cartridge type fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2108875A GB1476870A (en) | 1975-05-17 | 1975-05-17 | Fuse element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1476870A true GB1476870A (en) | 1977-06-16 |
Family
ID=10157011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2108875A Expired GB1476870A (en) | 1975-05-17 | 1975-05-17 | Fuse element |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1038427A (en) |
| GB (1) | GB1476870A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3239903A1 (en) * | 1981-11-09 | 1983-05-26 | Kombinat Veb Keramische Werke Hermsdorf, Ddr 6530 Hermsdorf | Integral melting conductor for electrical fuses |
| GB2148626A (en) * | 1983-10-18 | 1985-05-30 | Marbourn Limited | Electrical fuselink |
-
1975
- 1975-05-17 GB GB2108875A patent/GB1476870A/en not_active Expired
-
1976
- 1976-05-17 CA CA252,685A patent/CA1038427A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3239903A1 (en) * | 1981-11-09 | 1983-05-26 | Kombinat Veb Keramische Werke Hermsdorf, Ddr 6530 Hermsdorf | Integral melting conductor for electrical fuses |
| GB2148626A (en) * | 1983-10-18 | 1985-05-30 | Marbourn Limited | Electrical fuselink |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1038427A (en) | 1978-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |