GB665630A - Improvements in or relating to coupling unit for capacitance pick-up - Google Patents
Improvements in or relating to coupling unit for capacitance pick-upInfo
- Publication number
- GB665630A GB665630A GB440649A GB440649A GB665630A GB 665630 A GB665630 A GB 665630A GB 440649 A GB440649 A GB 440649A GB 440649 A GB440649 A GB 440649A GB 665630 A GB665630 A GB 665630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pick
- bridge
- capacity
- capacitance
- inductor
- 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
- H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
- H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
- H03H2/008—Receiver or amplifier input circuits
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
665,630. Electric indicating systems. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Feb. 17, 1950. [Feb. 17, 1949] No. 4406/49. Class 40 (i). [Also in Group XXXVI] In capacity measurement, a capacitance pick-up 13 e.g. for measuring turbine blade clearances is connected through coaxial cable 14 to an inductor 11a of a coupling device, which is shunted by a variable capacitance 11b and inductively coupled to an inductor 11c which is connected through coaxial cable 15 to the input of an A.C. resistance bridge 12 operating at 50 Kc/s. The pick-up, the stray and variable capacitances, and the coupled inductors constitute a parallel resonant circuit which is tuned by the variable capacitance to the bridge frequency, for minimum pick-up capacity. A resistive impedance is reflected to the bridge input, and varies with small changes in pick-up capacity, so that the bridge may be calibrated to indicate the latter, or e.g. the blade clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB440649A GB665630A (en) | 1949-02-17 | 1949-02-17 | Improvements in or relating to coupling unit for capacitance pick-up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB440649A GB665630A (en) | 1949-02-17 | 1949-02-17 | Improvements in or relating to coupling unit for capacitance pick-up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB665630A true GB665630A (en) | 1952-01-30 |
Family
ID=9776596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB440649A Expired GB665630A (en) | 1949-02-17 | 1949-02-17 | Improvements in or relating to coupling unit for capacitance pick-up |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB665630A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017025353A1 (en) * | 2015-08-11 | 2017-02-16 | Continental Teves Ag & Co. Ohg | Device for measuring a measurement variable |
-
1949
- 1949-02-17 GB GB440649A patent/GB665630A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017025353A1 (en) * | 2015-08-11 | 2017-02-16 | Continental Teves Ag & Co. Ohg | Device for measuring a measurement variable |
| US10527461B2 (en) | 2015-08-11 | 2020-01-07 | Continental Teves Ag & Co. Ohg | Device for measuring a measurement variable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB665630A (en) | Improvements in or relating to coupling unit for capacitance pick-up | |
| GB655196A (en) | Improvement in echo ranging apparatus | |
| US2762971A (en) | Impedance measuring system | |
| GB642735A (en) | Improvements in and relating to radio frequency testing apparatus | |
| GB982837A (en) | Method and apparatus for measuring small reactance or impedance | |
| GB1063515A (en) | Measuring instruments for determining a physical property of a material | |
| US3120638A (en) | Twin-t network unbalance measuring system | |
| GB581246A (en) | Improvements in or relating to the measurement of electric impedances | |
| SU429374A1 (en) | DEVICE FOR CONTACTLESS MEASUREMENTS OF PARAMETERS OF SEMICONDUCTOR LAYERS AT HIGH FREQUENCY | |
| GB796188A (en) | Improvements in or relating to liquid level indicator | |
| GB629723A (en) | Improvements in or relating to electrical measuring instruments | |
| SU101410A1 (en) | Instrument for measuring low dielectric loss | |
| SU125067A1 (en) | Electronic moisture meter | |
| GB594072A (en) | Improvements in instruments for measuring capacitance | |
| SU53839A1 (en) | Device for measuring resistance | |
| Montgomery | An Inductively Coupled Frequency Modulator | |
| GB583981A (en) | Improvements in and relating to electrical measuring instruments of the bridge type | |
| ES217195A1 (en) | Remote crystal switching for oscillators | |
| GB568836A (en) | Capacity and inductance measuring apparatus | |
| SU4037A1 (en) | Device for measuring the distance of the aircraft from the earth's surface | |
| GB742948A (en) | Improvements in or relating to apparatus for measuring the magnitude and position ofa standing wave in a waveguide section | |
| GB708891A (en) | Improvements in or relating to circuit arrangements for measuring electric charges applied to a condenser | |
| JPS6112551B2 (en) | ||
| Wagner | A note on fundamental suppression in harmonic measurements | |
| GB638138A (en) | Improvements in or relating to electromagnetic detector devices for use in measuringapparatus |