GB780118A - Electric meter circuits - Google Patents
Electric meter circuitsInfo
- Publication number
- GB780118A GB780118A GB27878/55A GB2787855A GB780118A GB 780118 A GB780118 A GB 780118A GB 27878/55 A GB27878/55 A GB 27878/55A GB 2787855 A GB2787855 A GB 2787855A GB 780118 A GB780118 A GB 780118A
- Authority
- GB
- United Kingdom
- Prior art keywords
- series
- meter
- reverse
- class
- range
- 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
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/005—Circuits for altering the indicating characteristic, e.g. making it non-linear
- G01R15/007—Circuits for altering the indicating characteristic, e.g. making it non-linear by zero-suppression
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
780,118. Electric measuring instruments. WESTERN ELECTRIC CO., Inc. Sept. 30, 1955 [Oct. 18, 1954], No. 27878/55. Drawings to Specification. Class 37. The zero of a galvanometer is suppressed by connecting in series with its movement a non- linear resistor having a substantially constant dynamic resistance of low value over a major part of the range and a very high resistance over the initial part of the range. As described, a silicon avalanche type diode is used, either the forward or reverse characteristics being suitable. A further diode may be connected in series with the meter in reverse sense to protect the meter against reverse voltages. For A.C. measurements an A.C. meter is used and this is connected in series with a non-linear resistor either having a symmetrical characteristic for forward and reverse voltages or formed of two similar diodes connected back-to-back. The series resistor 4 may be such as to provide temperature compensation. Specification 2630/1886, [Class 106], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US780118XA | 1954-10-18 | 1954-10-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB780118A true GB780118A (en) | 1957-07-31 |
Family
ID=22141376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27878/55A Expired GB780118A (en) | 1954-10-18 | 1955-09-30 | Electric meter circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB780118A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2947941A (en) * | 1958-06-09 | 1960-08-02 | Gen Electric | Suppressed zero voltmeter |
US3031620A (en) * | 1959-04-16 | 1962-04-24 | Texas Instruments Inc | Galvanometer |
US3068410A (en) * | 1960-08-22 | 1962-12-11 | Galman Herbert | Expanded scale electrical measuring system having high temperature stability |
US3079556A (en) * | 1959-08-13 | 1963-02-26 | Internat Instr Inc | Expanded scale electrical indicating instrument |
US3268813A (en) * | 1962-03-22 | 1966-08-23 | American Mach & Foundry | Meter circuits with multiple increments of different slopes |
US3428897A (en) * | 1964-01-27 | 1969-02-18 | Weston Instruments Inc | Electric voltage measuring apparatus including a current-regulated zener diode for zero suppression |
JPS4921185A (en) * | 1972-06-15 | 1974-02-25 |
-
1955
- 1955-09-30 GB GB27878/55A patent/GB780118A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2947941A (en) * | 1958-06-09 | 1960-08-02 | Gen Electric | Suppressed zero voltmeter |
US3031620A (en) * | 1959-04-16 | 1962-04-24 | Texas Instruments Inc | Galvanometer |
US3079556A (en) * | 1959-08-13 | 1963-02-26 | Internat Instr Inc | Expanded scale electrical indicating instrument |
US3068410A (en) * | 1960-08-22 | 1962-12-11 | Galman Herbert | Expanded scale electrical measuring system having high temperature stability |
US3268813A (en) * | 1962-03-22 | 1966-08-23 | American Mach & Foundry | Meter circuits with multiple increments of different slopes |
US3428897A (en) * | 1964-01-27 | 1969-02-18 | Weston Instruments Inc | Electric voltage measuring apparatus including a current-regulated zener diode for zero suppression |
JPS4921185A (en) * | 1972-06-15 | 1974-02-25 |
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