GB549578A - Improvements in or relating to electric fuses - Google Patents
Improvements in or relating to electric fusesInfo
- Publication number
- GB549578A GB549578A GB654141A GB654141A GB549578A GB 549578 A GB549578 A GB 549578A GB 654141 A GB654141 A GB 654141A GB 654141 A GB654141 A GB 654141A GB 549578 A GB549578 A GB 549578A
- Authority
- GB
- United Kingdom
- Prior art keywords
- groove
- urea formaldehyde
- grooves
- strips
- carrier
- 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
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
- H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified
Abstract
549,578. Fusible cut-outs. ASTBURY, H., and CROMPTON PARKINSON, Ltd. May 21, 1941, No. 6541. [Class 38 (i)] One or more fusible elements 22 are enclosed in grooves in an insulating carrier 28 made of a material containing urea formaldehyde that evolves arc-extinguishing gases, and may be embedded in the grooves in a powder or a cement containing urea formaldehyde. A suitable powder filling consists of urea formaldehyde mixed with quartz sand, and a suitable cement consists of urea formaldehyde resin in liquid form with a hardening agent. The groove may be of sinuous form or it may be helical on the surface of a cylindrical carrier. A high-resistance wire may be coiled or folded in the groove, or a lowresistance strip may have portions 27 of reduced cross section, the groove being formed to fit. Where perforations are formed in the strip a boss 29 may protrude from the bottom of the groove into each perforation. The ends of the fusible elements are attached to transverse strips 30 secured by rivets 25 with shoulders to engage the strips. Grooves may be formed in opposite faces of a flat carrier, and several carriers may be superposed, the rivets 25 passing through the end strips of the fuses to connect them in parallel. The superposed carriers with cover plates 47, 48 may form a prismatic or cylindrical structure to which end caps 50 with terminal brackets 55 are fitted. A vent in the cover plate is covered with paper &c. which is destroyed by the blowing of the fuse to act as an indicator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB654141A GB549578A (en) | 1941-05-21 | 1941-05-21 | Improvements in or relating to electric fuses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB654141A GB549578A (en) | 1941-05-21 | 1941-05-21 | Improvements in or relating to electric fuses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB549578A true GB549578A (en) | 1942-11-27 |
Family
ID=9816370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB654141A Expired GB549578A (en) | 1941-05-21 | 1941-05-21 | Improvements in or relating to electric fuses |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB549578A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0699565A3 (en) * | 1994-08-24 | 1996-12-11 | Whitaker Corp | Fused car battery therminal and fuselink therefor |
-
1941
- 1941-05-21 GB GB654141A patent/GB549578A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0699565A3 (en) * | 1994-08-24 | 1996-12-11 | Whitaker Corp | Fused car battery therminal and fuselink therefor |
| US5805047A (en) * | 1994-08-24 | 1998-09-08 | The Whitaker Corporation | Fused car battery terminal and fuse-link therefor |
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