GB518919A - - Google Patents
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- Publication number
- GB518919A GB518919A GB518919DA GB518919A GB 518919 A GB518919 A GB 518919A GB 518919D A GB518919D A GB 518919DA GB 518919 A GB518919 A GB 518919A
- Authority
- GB
- United Kingdom
- Prior art keywords
- extension piece
- piece
- pole piece
- light intensities
- instrument
- 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.)
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- Details Of Measuring Devices (AREA)
Abstract
518,919. Current measurements. GENERAL ELECTRIC CO., Ltd., MORRIS, H. W., and TURNER, H. C. July 7, 1938, No. 20145. [Class 37] In a moving-coil ammeter adapted to operate with a logarithmic or like characteristic, an extension piece 4 of thin iron strip is provided on one pole piece 3 of the instrument permanent magnet 1 so as to produce a counter torque in the moving coil 6. The extension piece 4 is adjustably secured to the pole piece 3 by a screw passing into the side of the pole piece through a slot in a flange 7 on the extension piece. The instrument is used with a photo-electric exposure meter and is made sensitive for low light intensities, the extension piece being adjusted to bring the pointer on to the scale when used with large light intensities.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB518919A true GB518919A (en) |
Family
ID=1747950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB518919D Active GB518919A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB518919A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2505265A (en) * | 1943-12-01 | 1950-04-25 | Hartford Nat Bank & Trust Co | Moving-coil system without core for a luxmeter comprising a selenium cell |
| US2560375A (en) * | 1951-07-10 | Coreless moving coil system fob | ||
| US2565412A (en) * | 1951-08-21 | Coil system for nonlinear response | ||
| US2567660A (en) * | 1951-09-11 | Xcoreless m moving coil system | ||
| US2960003A (en) * | 1957-03-15 | 1960-11-15 | Kamera & Kinowerke Dresden Veb | Photoelectric light meter |
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0
- GB GB518919D patent/GB518919A/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2560375A (en) * | 1951-07-10 | Coreless moving coil system fob | ||
| US2565412A (en) * | 1951-08-21 | Coil system for nonlinear response | ||
| US2567660A (en) * | 1951-09-11 | Xcoreless m moving coil system | ||
| US2505265A (en) * | 1943-12-01 | 1950-04-25 | Hartford Nat Bank & Trust Co | Moving-coil system without core for a luxmeter comprising a selenium cell |
| US2960003A (en) * | 1957-03-15 | 1960-11-15 | Kamera & Kinowerke Dresden Veb | Photoelectric light meter |
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