GB517484A - Improvements in and relating to electrical measuring instruments - Google Patents
Improvements in and relating to electrical measuring instrumentsInfo
- Publication number
- GB517484A GB517484A GB22627/38A GB2262738A GB517484A GB 517484 A GB517484 A GB 517484A GB 22627/38 A GB22627/38 A GB 22627/38A GB 2262738 A GB2262738 A GB 2262738A GB 517484 A GB517484 A GB 517484A
- Authority
- GB
- United Kingdom
- Prior art keywords
- soldered
- heater
- wire
- passing
- main terminals
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
517,484. Current measurements. BRITISH SANGAMO CO., Ltd., (Weston Electrical Instrument Corporation). July 29, 1938, No. 22627. [Class 37] The internal wiring of an instrument is arranged to afford protection against pick-up of stray currents from high-frequency alternating electric fields by forming the internal leads between the moving coil and the source of current therefor as a tubular conductor through which the other conductor passes. In the thermal ammeter shown a permanent magnet 2 is mounted on a base 1 and carries upper and lower bridges 5<1> on which the moving system is pivoted and through which the connections to the moving coil 3 are made. Massive metal blocks 6 carrying the heater 7 are carried by main terminals passing through the base 1. The hot junction of the thermocouple 10 is located at the midpoint of the heater 7 the cold ends being soldered to compensating strips 11, 11<1> carried at each end by the blocks 6 but insulated therefrom by thin mica sheets 12. A short tubular conductor 13 is soldered to the upturned end of the compensating strip 11 and to a bracket on the lower bridge. Passing through the tube 13 is a wire 15 soldered to the compensating strip 11' and a bracket 14 on the upper bridge 5', the wire being bent around the magnet 2 to reach the upper bridge. The soldered terminals of the strips 11, 11<1> are adjacent to each other and symmetrical with respect to a plane passing through the main terminals. The plane of the concentric conductors 13, 15 is normal to the current path through the heater 7 between the main terminals. In a modification the exposed portion of the central wire is reduced by arranging both the springs for making connection to the moving coil at one end of the coil.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB22627/38A GB517484A (en) | 1938-07-29 | 1938-07-29 | Improvements in and relating to electrical measuring instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB22627/38A GB517484A (en) | 1938-07-29 | 1938-07-29 | Improvements in and relating to electrical measuring instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB517484A true GB517484A (en) | 1940-01-31 |
Family
ID=10182493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22627/38A Expired GB517484A (en) | 1938-07-29 | 1938-07-29 | Improvements in and relating to electrical measuring instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB517484A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7070402B2 (en) | 2002-10-09 | 2006-07-04 | The Timken Company | Integrated speed reducer and pump assembly |
CN103983826A (en) * | 2014-05-22 | 2014-08-13 | 国家电网公司 | Full-contact wiring rod head for electric energy meter testing meter stand |
-
1938
- 1938-07-29 GB GB22627/38A patent/GB517484A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7070402B2 (en) | 2002-10-09 | 2006-07-04 | The Timken Company | Integrated speed reducer and pump assembly |
CN103983826A (en) * | 2014-05-22 | 2014-08-13 | 国家电网公司 | Full-contact wiring rod head for electric energy meter testing meter stand |
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