GB476368A - Improvements in and relating to arc-extinguishing tubes for electric circuit-breakers - Google Patents
Improvements in and relating to arc-extinguishing tubes for electric circuit-breakersInfo
- Publication number
- GB476368A GB476368A GB13107/37A GB1310737A GB476368A GB 476368 A GB476368 A GB 476368A GB 13107/37 A GB13107/37 A GB 13107/37A GB 1310737 A GB1310737 A GB 1310737A GB 476368 A GB476368 A GB 476368A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arc
- oxalic acid
- hard
- oil
- breakers
- 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
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/47—Strap-end-attaching devices
- Y10T24/4782—Watch strap
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
476,368. High - tension switches. BRITISH THOMSON-HOUSTON CO., Ltd. May 7, 1937, No. 13107. Convention date, May 16, 1936. [Class 38 (v)] The inner wall of an arc-extinguishing tube for electric switches consists of oxalic acid, with or without the addition of an oxidizing agent, e.g. a per-salt or organic peroxide. The oxalic acid may be used, with or without additions, in powder form, and is moulded and pressed hard with the aid of a binding agent, which may consist of a highly oxidized oil, e.g. linseed oil or wood oil, a pre-polymerized artificial resin, preferably a resin derived from urea, or an inorganic material, e.g. plaster of Paris or clay. The oxalic acid material may be encased in a reinforcing substance, e.g. hard paper or hard linen. When exposed to an arc, the oxalic acid is decomposed, with evolution of carbon dioxide, which quenches the arc. Specification 467,496 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE476368X | 1936-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB476368A true GB476368A (en) | 1937-12-07 |
Family
ID=6541991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13107/37A Expired GB476368A (en) | 1936-05-16 | 1937-05-07 | Improvements in and relating to arc-extinguishing tubes for electric circuit-breakers |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2089050A (en) |
| GB (1) | GB476368A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2545596A (en) * | 1949-08-25 | 1951-03-20 | Mcgraw Electric Co | Arc extinguishing material |
| US2526448A (en) * | 1949-08-25 | 1950-10-17 | Mcgraw Electric Co | Arc extinguishing material |
| US2645693A (en) * | 1949-09-13 | 1953-07-14 | Fed Electric Prod Co | Molded casing for electrical apparatus |
-
1937
- 1937-01-28 US US122773A patent/US2089050A/en not_active Expired - Lifetime
- 1937-05-07 GB GB13107/37A patent/GB476368A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2089050A (en) | 1937-08-03 |
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