GB487338A - Improvements in or relating to phase adjusting and/or measuring devices - Google Patents
Improvements in or relating to phase adjusting and/or measuring devicesInfo
- Publication number
- GB487338A GB487338A GB3485836A GB3485836A GB487338A GB 487338 A GB487338 A GB 487338A GB 3485836 A GB3485836 A GB 3485836A GB 3485836 A GB3485836 A GB 3485836A GB 487338 A GB487338 A GB 487338A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- valve
- solenoid
- adjusted
- switch
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/18—Networks for phase shifting
- H03H7/20—Two-port phase shifters providing an adjustable phase shift
Abstract
487,338. Impedance networks. STANDARD TELEPHONES & CABLES, Ltd., and BARNARD, R. M. Dec. 18, 1936, No. 34858. [Class 40 (iii)] [Also in Group XXXV] A phase-shifting arrangement which will operate over a range of frequencies comprises a solenoid A with distributed capacity and resistance K to simulate a line, the voltage, the phase of which is to be adjusted, being applied at one end of the line through a variable condenser K1 for adjusting the wavelength of the line, the other end of the line being closed through a resistance R which is adjusted to be equal to the characteristic resistance of the line. When Kl and R have been adjusted to suit the frequency, 180‹ phase shift may be obtained by movement of the contact C along the solenoid. To avoid loading the line the output is taken through a valve amplifier V3. Adjustment of the condenser K1 is effected by means of a valve V1 the grid of which is connected to the centre of the solenoid. The switch S is opened and the switch S2 placed so that the meter M is in the anode circuit of the valve VI. K1 is then adjusted until the meter reading is a minimum. To obtain correct value of R a valve V2 is provided its grid being connected to the output end of the solenoid A. The switch S1 is closed and R is adjusted until the meter reads the same whether it is in the anode circuit of the valve V1 or V2. In a modification two T filters with ganged condensers are used. In this form one of the filters is tapped and only 90‹ phase shift is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3485836A GB487338A (en) | 1936-12-18 | 1936-12-18 | Improvements in or relating to phase adjusting and/or measuring devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3485836A GB487338A (en) | 1936-12-18 | 1936-12-18 | Improvements in or relating to phase adjusting and/or measuring devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB487338A true GB487338A (en) | 1938-06-20 |
Family
ID=10370770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3485836A Expired GB487338A (en) | 1936-12-18 | 1936-12-18 | Improvements in or relating to phase adjusting and/or measuring devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB487338A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2478778A (en) * | 1943-06-22 | 1949-08-09 | Bell Telephone Labor Inc | Variable delay means |
-
1936
- 1936-12-18 GB GB3485836A patent/GB487338A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2478778A (en) * | 1943-06-22 | 1949-08-09 | Bell Telephone Labor Inc | Variable delay means |
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