GB442375A - Improvements in, or relating to, fusible electric cut-outs - Google Patents
Improvements in, or relating to, fusible electric cut-outsInfo
- Publication number
- GB442375A GB442375A GB2262234A GB2262234A GB442375A GB 442375 A GB442375 A GB 442375A GB 2262234 A GB2262234 A GB 2262234A GB 2262234 A GB2262234 A GB 2262234A GB 442375 A GB442375 A GB 442375A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheath
- core
- metal
- silver
- outs
- 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
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
- H01H85/06—Fusible members characterised by the fusible material
Landscapes
- Contacts (AREA)
Abstract
442,375. Fusible cut-outs. CRABTREE, J. A., Endwood, Little Aston Park, Sutton Coldfield. Aug. 3, 1934, No. 22622. [Class 38 (i)] A fuse element consists of a sheath of a metal which does not deteriorate in conductivity due to oxidation by heating in air and a core of a metal having a boiling point substantially less than the melting point of the sheath metal or of an alloy of which one of the constituents has such a boiling point. Preferably also the core or one of its constituents has an atomic weight higher than that of the sheath. Suitable materials are silver for the sheath and cadmium or a cadmium-tin alloy for the core. The time of fusing may be controlled by forming the element with an irregular sectional area or by applying local coverings at one or more points. The element may be enclosed in a ceramic container packed with sand and may be provided with an indicator dependent upon the subsequent fusing of a higher-resistance wire connected in parallel. The Provisional Specification refers also to the use of zinc in combination with silver, to the use of silver alloys, and to alternative arrangements in which the materials are arranged in the form of laminµ or as combinations of separate conductors arranged in series or parallel. Specifications 439,432 and 439,517 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2262234A GB442375A (en) | 1934-08-03 | 1934-08-03 | Improvements in, or relating to, fusible electric cut-outs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2262234A GB442375A (en) | 1934-08-03 | 1934-08-03 | Improvements in, or relating to, fusible electric cut-outs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB442375A true GB442375A (en) | 1936-02-03 |
Family
ID=10182412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2262234A Expired GB442375A (en) | 1934-08-03 | 1934-08-03 | Improvements in, or relating to, fusible electric cut-outs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB442375A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2170204A1 (en) * | 1972-02-04 | 1973-09-14 | Knudsen Nordisk Elect | |
| FR2512269A1 (en) * | 1981-08-27 | 1983-03-04 | Kearney National Inc | ELECTRIC FUSE AND ITS FUSIBLE ELEMENT INCORPORATES |
-
1934
- 1934-08-03 GB GB2262234A patent/GB442375A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2170204A1 (en) * | 1972-02-04 | 1973-09-14 | Knudsen Nordisk Elect | |
| FR2512269A1 (en) * | 1981-08-27 | 1983-03-04 | Kearney National Inc | ELECTRIC FUSE AND ITS FUSIBLE ELEMENT INCORPORATES |
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