GB295714A - Improvement in ammeter - Google Patents
Improvement in ammeterInfo
- Publication number
- GB295714A GB295714A GB22442/28A GB2244228A GB295714A GB 295714 A GB295714 A GB 295714A GB 22442/28 A GB22442/28 A GB 22442/28A GB 2244228 A GB2244228 A GB 2244228A GB 295714 A GB295714 A GB 295714A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- conductor
- clamp
- magnetic material
- casing
- 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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R5/00—Instruments for converting a single current or a single voltage into a mechanical displacement
- G01R5/14—Moving-iron instruments
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnets (AREA)
- Measurement Of Current Or Voltage (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
295,714. A. C. Spark Plug Co., (Assignees of Eshbaugh, J. E.). Aug. 19, 1927, [Convention date]. Electromagnetic c u r r e n t meters.- An ammeter, particularly for use on the dashboard of an automobile, has an armature 22 of magnetic material controlled by a horse-shoe permanent magnet 28 and means for clamping a, conductor 30, carrying the current to be measured on the exterior of the casing in a predetermined position such that the armature is deflected by the magnetic field, which extends within the casing 10. As shown, a single loop of the conductor 30 is arranged with the two unidirectional strands fixed directly to the rear of the armature 22 and held by a U-shaped portion 33 of the clamp 32, which is fastened by a bolt 34 and wing nut 36. The clamp is of steel or other magnetic material so as to concentrate the magnetic field. The permanent magnet may be a straight bar instead of a horseshoe. In a modification the clamp of magnetic material is omitted and the loop of conductor is held by clips punched out from the back of the case.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US214159A US1761908A (en) | 1927-08-19 | 1927-08-19 | Ammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB295714A true GB295714A (en) | 1929-11-04 |
Family
ID=22797993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22442/28A Expired GB295714A (en) | 1927-08-19 | 1928-08-02 | Improvement in ammeter |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1761908A (en) |
| DE (1) | DE536173C (en) |
| FR (1) | FR659137A (en) |
| GB (1) | GB295714A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2460686A (en) * | 1944-01-04 | 1949-02-01 | Edison Inc Thomas A | Electrical instrument |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2446431A (en) * | 1945-01-29 | 1948-08-03 | Paul Mood | Electrical measuring instrument |
| US2926303A (en) * | 1956-02-20 | 1960-02-23 | Jesse D Staggs | Engine-speed indicating system |
-
1927
- 1927-08-19 US US214159A patent/US1761908A/en not_active Expired - Lifetime
-
1928
- 1928-08-02 GB GB22442/28A patent/GB295714A/en not_active Expired
- 1928-08-07 DE DEA54980D patent/DE536173C/en not_active Expired
- 1928-08-18 FR FR659137D patent/FR659137A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2460686A (en) * | 1944-01-04 | 1949-02-01 | Edison Inc Thomas A | Electrical instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| DE536173C (en) | 1931-10-20 |
| FR659137A (en) | 1929-06-25 |
| US1761908A (en) | 1930-06-03 |
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