GB613270A - Improvements in or relating to mercury displacement switches - Google Patents
Improvements in or relating to mercury displacement switchesInfo
- Publication number
- GB613270A GB613270A GB1793146A GB1793146A GB613270A GB 613270 A GB613270 A GB 613270A GB 1793146 A GB1793146 A GB 1793146A GB 1793146 A GB1793146 A GB 1793146A GB 613270 A GB613270 A GB 613270A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- armature
- mercury
- switches
- poles
- 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
- H01H29/00—Switches having at least one liquid contact
- H01H29/18—Switches having at least one liquid contact with level of surface of contact liquid displaced by non-electrical contact-making plunger
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
613,270. Mercury switches; magnetic switches. ELECTRICAL STEAM & MINING EQUIPMENT (LONDON), Ltd., and WEBB, E. F. D. June 14, 1946, No. 17931. [Class 38 (v)] In a switch wherein the movement of a permanent magnet 15 causes corresponding movement of an armature 11 floating in mercury in a sealed envelope 10, spaced members 12, 13 of non-permanent magnetic material are arranged so as to be opposite to the poles of to magnet, when it is moved into the operating position " b," Fig. 1. In this position, the magnet attracts the armature 11 into the position shown. When the magnet 15 is in position " a," both poles are opposite to the sleeve 13 which provides a closed circuit for the flux so that the armature 11 is unaffected and returns to its floating position. The polepieces of the magnet 15 are preferably ground concave to conform to the tube 14 of non-magnetic material. The opposed ends of the sleeves 12 and 13 may be chamfered from the outer to the inner radius in order to concentrate the flux as near as possible to the armature. Also the magnet 15 may be of tubular form to surround the tube 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1793146A GB613270A (en) | 1946-06-14 | 1946-06-14 | Improvements in or relating to mercury displacement switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1793146A GB613270A (en) | 1946-06-14 | 1946-06-14 | Improvements in or relating to mercury displacement switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB613270A true GB613270A (en) | 1948-11-24 |
Family
ID=10103754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1793146A Expired GB613270A (en) | 1946-06-14 | 1946-06-14 | Improvements in or relating to mercury displacement switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB613270A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2727959A (en) * | 1952-12-26 | 1955-12-20 | Pure Oil Co | Sparkless electric "toggle" switch |
| US2770697A (en) * | 1954-04-01 | 1956-11-13 | Alfred L Kellett | Magnetic electrical switch |
| US2783326A (en) * | 1955-08-23 | 1957-02-26 | Louis P Hanson | Electric switching means |
-
1946
- 1946-06-14 GB GB1793146A patent/GB613270A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2727959A (en) * | 1952-12-26 | 1955-12-20 | Pure Oil Co | Sparkless electric "toggle" switch |
| US2770697A (en) * | 1954-04-01 | 1956-11-13 | Alfred L Kellett | Magnetic electrical switch |
| US2783326A (en) * | 1955-08-23 | 1957-02-26 | Louis P Hanson | Electric switching means |
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