GB532413A - Improvements in or relating to fuses for electric circuits - Google Patents
Improvements in or relating to fuses for electric circuitsInfo
- Publication number
- GB532413A GB532413A GB24815/39A GB2481539A GB532413A GB 532413 A GB532413 A GB 532413A GB 24815/39 A GB24815/39 A GB 24815/39A GB 2481539 A GB2481539 A GB 2481539A GB 532413 A GB532413 A GB 532413A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wire
- conductor
- mass
- embedded
- glass
- 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
-
- 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
- H01H85/0039—Means for influencing the rupture process of the fusible element
- H01H85/0073—Expansion or rupture of the insulating support for the fusible element
Landscapes
- Fuses (AREA)
Abstract
532,413. Fuzible cut-outs. PHILIPS LAMPS, Ltd. Aug. 29, 1939, No. 24815. Convention date, Sept. 1, 1938. [Class 38 (i)] A fuse comprises a conductor embedded in a solid mass of material which is an electric insulator but serves to cool the conductor, but which also interrupts the conductor if an excessive current passes. The fuse allows repeated overloading for short periods which allow the heat generated to be dissipated, but it breaks down if overloaded for a relatively long period when the heat developed is so great that the mass of material undergoes a change. The conductor may consist of a wire of nickel-iron alloy, and it may be coated with a precious metal such as platinum. The wire 3, Fig. 1, may be embedded in glass or artificial resin. When an excessive amount of heat is developed by the current through the wire, the glass softens and sags and its weight breaks the wire. The glass also may crack and expose the wire which oxidizes or burns. In another construction, shown in Fig. 3, the wire 7 is embedded in artificial resin 8 and a helical spring 9 is connected to one of the leads 5 and to the remote end of the resinous mass, the spring being compressed. If the heat generated softens the resin, the spring extends the mass 8 and breaks the wire. The fuse may be straight, as shown, or of any other suitable shape.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL222363X | 1938-09-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB532413A true GB532413A (en) | 1941-01-23 |
Family
ID=19779431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24815/39A Expired GB532413A (en) | 1938-09-01 | 1939-08-29 | Improvements in or relating to fuses for electric circuits |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2302820A (en) |
| BE (1) | BE436228A (en) |
| CH (1) | CH222363A (en) |
| DE (1) | DE733525C (en) |
| FR (1) | FR859685A (en) |
| GB (1) | GB532413A (en) |
| NL (1) | NL54815C (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2830156A (en) * | 1956-12-21 | 1958-04-08 | Jr Arthur A Burgess | Shock and vibration resistant fuse |
| US2895031A (en) * | 1958-07-24 | 1959-07-14 | Chase Shawmut Co | Fusible protective devices |
| US2973418A (en) * | 1958-10-07 | 1961-02-28 | Bell Telephone Labor Inc | Fuse-resistor |
| US3009040A (en) * | 1959-08-03 | 1961-11-14 | Bernstein Elliot | Fuse link, particularly for liquid-filled capacitors, and method of manufacture |
| US2989609A (en) * | 1960-01-19 | 1961-06-20 | Ward Russell | Fused electrical connector |
| US3089013A (en) * | 1960-10-18 | 1963-05-07 | Ralph S Gens | High voltage expulsion link |
| US3304387A (en) * | 1966-01-24 | 1967-02-14 | S & C Electric Co | Current-limiting fuse having parallel current-limiting elements and a series connected current calibrated element with auxiliary arc gaps to blow the current-limiting elements one by one |
| GB1104801A (en) * | 1963-12-05 | 1968-02-28 | English Electric Co Ltd | Improvements in and relating to cartridge fuses |
| US3271544A (en) * | 1964-04-14 | 1966-09-06 | Electra Mfg Company | Precision electrical fuse |
| US3304394A (en) * | 1964-11-06 | 1967-02-14 | Mc Graw Edison Co | Glass-encased electric fuses |
| DE1287682B (en) * | 1965-06-15 | 1969-01-23 | ||
| US3423574A (en) * | 1965-10-14 | 1969-01-21 | Sanders Associates Inc | Electrical resistance heating pad |
| US3581262A (en) * | 1969-03-06 | 1971-05-25 | Efim Yakovlevich Badinter | Safety fuse with glass coating on fusible portion |
| SE341746B (en) * | 1970-03-10 | 1972-09-18 | Ericsson Telefon Ab L M | |
| US3766508A (en) * | 1972-07-03 | 1973-10-16 | Matsushita Electric Ind Co Ltd | Flame-proof coated resistors |
| US3818408A (en) * | 1972-09-11 | 1974-06-18 | O Andersson | Fuse, more especially a weak-current fuse for motor vehicles or the like |
| JP3194429B2 (en) * | 1998-06-02 | 2001-07-30 | オムロン株式会社 | Overcurrent cutoff structure |
| US6873243B1 (en) * | 2001-10-18 | 2005-03-29 | Cisco Technology, Inc. | Small-footprint fuse |
-
0
- NL NL54815D patent/NL54815C/xx active
- BE BE436228D patent/BE436228A/xx unknown
-
1939
- 1939-07-31 US US287664A patent/US2302820A/en not_active Expired - Lifetime
- 1939-08-29 GB GB24815/39A patent/GB532413A/en not_active Expired
- 1939-08-30 FR FR859685D patent/FR859685A/en not_active Expired
- 1939-08-30 DE DEN43551D patent/DE733525C/en not_active Expired
- 1939-08-30 CH CH222363D patent/CH222363A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE436228A (en) | |
| US2302820A (en) | 1942-11-24 |
| CH222363A (en) | 1942-07-15 |
| NL54815C (en) | |
| FR859685A (en) | 1940-12-24 |
| DE733525C (en) | 1943-03-29 |
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