GB338588A - Improvements in or relating to variable mutual inductances - Google Patents
Improvements in or relating to variable mutual inductancesInfo
- Publication number
- GB338588A GB338588A GB2546129A GB2546129A GB338588A GB 338588 A GB338588 A GB 338588A GB 2546129 A GB2546129 A GB 2546129A GB 2546129 A GB2546129 A GB 2546129A GB 338588 A GB338588 A GB 338588A
- Authority
- GB
- United Kingdom
- Prior art keywords
- inductance
- current
- inductances
- variable
- varied
- 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
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
Abstract
338,588. Standard Telephones & Cables, Ltd., and Blumlein, A. D. Aug. 21, 1929. Inductances, measuring; inductances. - An alternating- current bridge is provided with a fixed external inductance coupled through a magnetic core to inductances in at least two of its arms, the resistance of the bridge being kept constant while the mutual inductance is varied by current fed to the external inductance. A variable inductance comprises a number of relatively fixed inductances conductively connected and fed from a common source of alternating current, the ratio of current to potential on different members being varied by means of a shunted network across the inductance through which the current is varied. In one arrangement, Fig. 1, the coils 1, 4 and 5-8 form the primary and secondary windings of a toroidal inductance, current being fed from the source S through a variable resistance R to the secondary winding 5-8. The variable resistance R may be calibrated in inductance values. The measuring &c. instrument Z is connected in the diagonal A, C and when an inductance is being measured it is located at X in the arm A, D. In another arrangement, the coupled coils of the variable mutual inductance are both external to the bridge, and such an arrangement is employed in shielded bridges without affecting the shielding. The coil carrying the varying currents can be connected across a network such as that described in Specification 202,284, [Class 40 (iii), Telegraphs, Electric].
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2546129A GB338588A (en) | 1929-08-21 | 1929-08-21 | Improvements in or relating to variable mutual inductances |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2546129A GB338588A (en) | 1929-08-21 | 1929-08-21 | Improvements in or relating to variable mutual inductances |
Publications (1)
Publication Number | Publication Date |
---|---|
GB338588A true GB338588A (en) | 1930-11-21 |
Family
ID=10228040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2546129A Expired GB338588A (en) | 1929-08-21 | 1929-08-21 | Improvements in or relating to variable mutual inductances |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB338588A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2569691A (en) * | 1948-07-27 | 1951-10-02 | Rca Corp | Impedance measuring |
-
1929
- 1929-08-21 GB GB2546129A patent/GB338588A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2569691A (en) * | 1948-07-27 | 1951-10-02 | Rca Corp | Impedance measuring |
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