GB596889A - Improvements in or relating to arrangements for graduating the scales of electrical instruments - Google Patents
Improvements in or relating to arrangements for graduating the scales of electrical instrumentsInfo
- Publication number
- GB596889A GB596889A GB2000545A GB2000545A GB596889A GB 596889 A GB596889 A GB 596889A GB 2000545 A GB2000545 A GB 2000545A GB 2000545 A GB2000545 A GB 2000545A GB 596889 A GB596889 A GB 596889A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oscillation
- screen
- variable
- frequencies
- resistance
- 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
- 230000000051 modifying Effects 0.000 abstract 3
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/28—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response
- G01R27/32—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response in circuits having distributed constants, e.g. having very long conductors or involving high frequencies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Television Scanning (AREA)
Abstract
596,889. Indicators. STANDARD TELEPHONES & CABLES, Ltd., and DALY, C. T. Aug. 3, 1945, No. 20005. [Class 106 (iv)] [Also in Group XXXVI] An electrical instrument has a photographically sensitive scale which is graduated by recording thereon a linear trace produced on a cathode - ray screen when the instrument response is correct. As applied to a variable oscillator 1, Fig. 1, standard frequencies from a harmonic generator 11 are selected at 12 and applied to a balanced modulator 14 to modulate an oscillation from 15 ; the sum and difference frequencies are applied to a similar modulator 16 to which the variable oscillation is also applied, and the output is passed through a filter 17 tuned to the frequency of the oscillation from 15 so that the cathode ray is deflected when the frequencies of 1 and 12 are identical. The invention is also applicable to a variable oscillator of the heterodyne type, Fig. 2, (not shown). As applied to the calibration of a variable resistance, the resistance is connected in a Wheatstone bridge for comparison with a standard resistance, and the out-ofbalance voltage is applied to deflect the cathode ray off the screen, so that as balance is reached a linear trace is made on the screen for recording on the scale. Specifications 576,192 and 583,246, [Group XXXVI], are referred to.
Publications (1)
Publication Number | Publication Date |
---|---|
GB596889A true GB596889A (en) | 1948-01-13 |
Family
ID=1735149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2000545A Expired GB596889A (en) | 1945-08-03 | Improvements in or relating to arrangements for graduating the scales of electrical instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB596889A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2691762A (en) * | 1951-06-05 | 1954-10-12 | Gertsch Products Inc | Direct reading vernier heterodyne very high-frequency meter |
-
1945
- 1945-08-03 GB GB2000545A patent/GB596889A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2691762A (en) * | 1951-06-05 | 1954-10-12 | Gertsch Products Inc | Direct reading vernier heterodyne very high-frequency meter |
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