GB424360A - Improvements in electric safety cut-outs - Google Patents
Improvements in electric safety cut-outsInfo
- Publication number
- GB424360A GB424360A GB3059833A GB3059833A GB424360A GB 424360 A GB424360 A GB 424360A GB 3059833 A GB3059833 A GB 3059833A GB 3059833 A GB3059833 A GB 3059833A GB 424360 A GB424360 A GB 424360A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mercury
- caps
- conducting liquid
- cut
- thread
- 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
- H01H87/00—Protective devices in which a current flowing through a liquid or solid is interrupted by the evaporation of the liquid or by the melting and evaporation of the solid when the current becomes excessive, the circuit continuity being reestablished on cooling
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
424,360. Mercury switches. KELLENDORFER, R., 60, Lothstrasse, Munich, Germany. Nov. 3, 1933, No. 30598. [Class 38 (v)] A mercury cut-out comprises a transparent insulating tube b having flush with its ends metal caps c, the space thus formed being partly filled with a conducting liquid f such as mercury and containing a small amount of gas p. The parts band c are mounted in a second transparent tube a to which are sealed conducting end caps e. Electrical connection is made between the caps c and the end caps e either by springs or by a bead of mercury d thus allowing a little for expansion. The caps c are screw threaded internally or are fitted with coiled springs to provide a frictional engagement with the conducting liquid to prevent disengagement of the liquid by slight shocks. On overload, the amount passing through the thread f causes it to vaporize and the gas buffer p is displaced thus rupturing the thread f. To reset, the cut-out is shaken or knocked, bringing the conducting liquid down to the position shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3059833A GB424360A (en) | 1933-11-03 | 1933-11-03 | Improvements in electric safety cut-outs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3059833A GB424360A (en) | 1933-11-03 | 1933-11-03 | Improvements in electric safety cut-outs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB424360A true GB424360A (en) | 1935-02-20 |
Family
ID=10310143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3059833A Expired GB424360A (en) | 1933-11-03 | 1933-11-03 | Improvements in electric safety cut-outs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB424360A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000031768A1 (en) * | 1998-11-20 | 2000-06-02 | Moeller Gmbh | Self-recovering current-limiting device with liquid metal |
-
1933
- 1933-11-03 GB GB3059833A patent/GB424360A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000031768A1 (en) * | 1998-11-20 | 2000-06-02 | Moeller Gmbh | Self-recovering current-limiting device with liquid metal |
| US6788516B1 (en) | 1998-11-20 | 2004-09-07 | Moeller Gmbh | Self-recovering current-limiting device with liquid metal |
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