GB1371835A - Transducer apparatus - Google Patents
Transducer apparatusInfo
- Publication number
- GB1371835A GB1371835A GB3731272A GB3731272A GB1371835A GB 1371835 A GB1371835 A GB 1371835A GB 3731272 A GB3731272 A GB 3731272A GB 3731272 A GB3731272 A GB 3731272A GB 1371835 A GB1371835 A GB 1371835A
- Authority
- GB
- United Kingdom
- Prior art keywords
- displacement
- electrode
- capacitance
- varies
- frequency
- 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
- G01G—WEIGHING
- G01G7/00—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups
- G01G7/06—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups by electrostatic action
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/001—Constructional details of gauge heads
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
1371835 Variable capacitor displacement transducers GEORGE SALTER & CO Ltd 7 Aug 1973 [10 Aug 1972] 37312/72 Heading G1N [Also in Division H1] A displacement transducer includes a variable capacitor formed of a fixed electrode 15, Fig. 1, and a slidable electrode 12 which can move within an insulating guide tube 14 so as to overlap a tapered portion 16 of the fixed electrode. The slidable electrode is connected to a probe 11 so that the displacement to be measured by the probe varies the overlap of the electrodes and hence varies their capacitance. An oscillator circuit 39 changes its frequency as the capacitance varies, and the taper of electrode portion 16 is chosen to give a linear relationship between frequency and displacement. A set of metal loops 46, Fig. 3, is provided which are mounted on the outer casing of the transducer and which are electrically connected thereby to the fixed electrode. By use of adjusting screws 50 the relationship between capacitance and displacement can be finely adjusted. An alternative fine adjustment may be provided by a layer of conductive paint (not shown) on the outside of the guide tube, this paint being selectively removed to give the required adjustment. The output frequency may be digitally displayed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3731272A GB1371835A (en) | 1973-08-07 | 1973-08-07 | Transducer apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3731272A GB1371835A (en) | 1973-08-07 | 1973-08-07 | Transducer apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1371835A true GB1371835A (en) | 1974-10-30 |
Family
ID=10395487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3731272A Expired GB1371835A (en) | 1973-08-07 | 1973-08-07 | Transducer apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1371835A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2456305A1 (en) * | 1979-05-11 | 1980-12-05 | Marchal Equip Auto | Angular positioning of motor vehicle headlamps - using capacitance type position sensor to provide signal for controller |
WO1993005370A1 (en) * | 1991-08-28 | 1993-03-18 | Soehnle-Waagen Gmbh & Co. | Weighing cell for an electronic balance |
-
1973
- 1973-08-07 GB GB3731272A patent/GB1371835A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2456305A1 (en) * | 1979-05-11 | 1980-12-05 | Marchal Equip Auto | Angular positioning of motor vehicle headlamps - using capacitance type position sensor to provide signal for controller |
WO1993005370A1 (en) * | 1991-08-28 | 1993-03-18 | Soehnle-Waagen Gmbh & Co. | Weighing cell for an electronic balance |
US6407349B1 (en) | 1991-08-28 | 2002-06-18 | Soehnle-Waagen Gmbh & Co. | Compact weighing cell for an electronic balance |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |