GB348399A - Means for indicating the polarity at any time of a horseshoeshaped electromagnet - Google Patents
Means for indicating the polarity at any time of a horseshoeshaped electromagnetInfo
- Publication number
- GB348399A GB348399A GB1537830A GB1537830A GB348399A GB 348399 A GB348399 A GB 348399A GB 1537830 A GB1537830 A GB 1537830A GB 1537830 A GB1537830 A GB 1537830A GB 348399 A GB348399 A GB 348399A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- electromagnet
- polarity
- secured
- needle
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/14—Indicating direction of current; Indicating polarity of voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Knitting Machines (AREA)
Abstract
348,399. Current meters ; currentdirection indicators. TYER & CO., Ltd. and PUNTER, J. W., Ashwin Street, Dalston, London. May 19, 1930, No. 15378. [Class 37.] A strip of soft iron or other magnetic material d, secured to a non-magnetic pivoted needle B, is arranged symmetrically between the poles a<1>, a<2> of a horseshoe electromagnet energized by coils A<1>, A<2>. The strip d is magnetized by induction from a permanent magnet D, one pole of which is adjacent to the central portion of the strip. By this arrangement the ends of the strip are of similar polarity with a consequent pole in the centre, and the movable system is deflected in a direction dependent on the direction of the current in the windings A<1>, A<2>. The needle B is pivoted in two small plates c<2> secured to the polepieces a,<1> a<2> and is provided with a counterweight b to bring it to its central position when the electromagnet is de-energized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1537830A GB348399A (en) | 1930-05-19 | 1930-05-19 | Means for indicating the polarity at any time of a horseshoeshaped electromagnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1537830A GB348399A (en) | 1930-05-19 | 1930-05-19 | Means for indicating the polarity at any time of a horseshoeshaped electromagnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB348399A true GB348399A (en) | 1931-05-14 |
Family
ID=10058097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1537830A Expired GB348399A (en) | 1930-05-19 | 1930-05-19 | Means for indicating the polarity at any time of a horseshoeshaped electromagnet |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB348399A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988776A (en) * | 2019-11-25 | 2020-04-10 | 国网山东省电力公司潍坊供电公司 | Device for detecting polarity of current transformer in small-current grounding line selection device |
-
1930
- 1930-05-19 GB GB1537830A patent/GB348399A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988776A (en) * | 2019-11-25 | 2020-04-10 | 国网山东省电力公司潍坊供电公司 | Device for detecting polarity of current transformer in small-current grounding line selection device |
| CN110988776B (en) * | 2019-11-25 | 2022-07-01 | 国网山东省电力公司潍坊供电公司 | Device for detecting polarity of current transformer in small-current grounding line selection device |
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