GB509331A - Improvements in and relating to electric fuses - Google Patents
Improvements in and relating to electric fusesInfo
- Publication number
- GB509331A GB509331A GB3584/38A GB358438A GB509331A GB 509331 A GB509331 A GB 509331A GB 3584/38 A GB3584/38 A GB 3584/38A GB 358438 A GB358438 A GB 358438A GB 509331 A GB509331 A GB 509331A
- Authority
- GB
- United Kingdom
- Prior art keywords
- feb
- fusible
- blown
- cut
- 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
- H01H85/38—Means for extinguishing or suppressing arc
- H01H85/42—Means for extinguishing or suppressing arc using an arc-extinguishing gas
Landscapes
- Fuses (AREA)
Abstract
509,331. Fusible cut-outs. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 4, 1938, Nos. 3584 and 3585. Convention dates, Feb. 4, 1937, and Feb. 10, 1937. [Class 38 (i)] [Also in Group XXXVII] High-tension D.C. or A.C. circuits are protected by two fusible cut-outs in series in the same cartridge. One deals with overloads and is of the type in which the fuse wire is heatinsulatingly mounted and has a cover releasable by vapour pressure and the other deals with short-circuits and is of the type in which the fusible conductor is embedded in granular material of good thermal conductivity. Both fuses may be provided with a single casing, as shown in Fig. 1. The cap 4, which is blown off when the overload fuse 1. blows may be replaced by a silencer. To avoid excessive length of the combined cut-out, the fusible member of the overload part may be in a tortuous channel which may be provided at intervals along its length with stoppers which are blown out by excessive pressure, Fig. 2 (not shown). In modified arrangements, Figs. 3 and 4, the channel is helical and has one side formed by a strip 10, 12 designed to be blown off in the case of a short-circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE509331X | 1937-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB509331A true GB509331A (en) | 1939-07-14 |
Family
ID=6547176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3584/38A Expired GB509331A (en) | 1937-02-04 | 1938-02-04 | Improvements in and relating to electric fuses |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB509331A (en) |
-
1938
- 1938-02-04 GB GB3584/38A patent/GB509331A/en not_active Expired
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