GB486856A - Electrical process and apparatus for determining or following changes occurring in a test body while an external influence acts upon it for determining the properties or nature of the body or of the influence - Google Patents
Electrical process and apparatus for determining or following changes occurring in a test body while an external influence acts upon it for determining the properties or nature of the body or of the influenceInfo
- Publication number
- GB486856A GB486856A GB3353336A GB3353336A GB486856A GB 486856 A GB486856 A GB 486856A GB 3353336 A GB3353336 A GB 3353336A GB 3353336 A GB3353336 A GB 3353336A GB 486856 A GB486856 A GB 486856A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- foil
- determining
- influence
- apertured
- 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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
486,856. Measuring capacities. O'DELL, A. E. (Haardt & Co. Akt.-Ges.) Dec. 7, 1936, No. 33533. [Class 37] A process for observing changes occurring in a material while an external influence acts upon it, whether for determining the properties &c. of the material or of the influence, by measuring the dielectric constant of a substance forming the dielectric of a condenser, is characterized by the material to be tested being placed in stationary thin flat form in contact with an electrode of the condenser and being covered by an apertured plate through which the external influence gains access to it. The material to be observed may be films, foil, fabric or other sheets and in one form which is suitable for testing wood for drying and impregnation, a thin sheet of wood is clamped between two metal plates, one of which is apertured. The dielectric constant of the wood is measured during a period of time and from the variations in its value the progress of the treatment can be determined. In a modification, the permeability of a foil S to fluid is determined by mounting the foil between apertured plates H, P<1>, the lower of which with the plate P<2> constitutes a condenser having a dielectric O, also formed of thin foil, whose dielectric constant varies with the fluid it absorbs. The spacing between the condenser plates may be determined by insulating pieces J. In a further form for measuring absorption of gases, the condenser is mounted in a pipeline and comprises a pair of apertured plates between which is clamped a foil adapted to take up gaseous ingredients. The influences acting on the test material may be temperature, pressure or the surrounding gas or liquid and the test material may be a film supported on a thin flat insulating carrier. Examples of such materials are given. Specification 276,468, [Class 37], is referred to.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW94566D DE720707C (en) | 1934-07-03 | 1934-07-03 | Device for determining the permeability, absorption, adsorption and swelling of static foils exposed to chemical influences |
| GB3353336A GB486856A (en) | 1936-12-07 | 1936-12-07 | Electrical process and apparatus for determining or following changes occurring in a test body while an external influence acts upon it for determining the properties or nature of the body or of the influence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3353336A GB486856A (en) | 1936-12-07 | 1936-12-07 | Electrical process and apparatus for determining or following changes occurring in a test body while an external influence acts upon it for determining the properties or nature of the body or of the influence |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB486856A true GB486856A (en) | 1938-06-07 |
Family
ID=10354185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3353336A Expired GB486856A (en) | 1934-07-03 | 1936-12-07 | Electrical process and apparatus for determining or following changes occurring in a test body while an external influence acts upon it for determining the properties or nature of the body or of the influence |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB486856A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2491689A (en) * | 1945-05-09 | 1949-12-20 | Pollock Jacob | Moisture tester |
| US2506478A (en) * | 1945-10-12 | 1950-05-02 | Kelvin Bottomley & Baird Ltd | Instrument for testing paper |
| US2794953A (en) * | 1954-02-25 | 1957-06-04 | Budd Co | Method and apparatus for testing wall continuity by capacitance alteration |
| GB2136130A (en) * | 1983-02-28 | 1984-09-12 | Theodore Henry Krueger | Chemical Assay Systems |
-
1936
- 1936-12-07 GB GB3353336A patent/GB486856A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2491689A (en) * | 1945-05-09 | 1949-12-20 | Pollock Jacob | Moisture tester |
| US2506478A (en) * | 1945-10-12 | 1950-05-02 | Kelvin Bottomley & Baird Ltd | Instrument for testing paper |
| US2794953A (en) * | 1954-02-25 | 1957-06-04 | Budd Co | Method and apparatus for testing wall continuity by capacitance alteration |
| GB2136130A (en) * | 1983-02-28 | 1984-09-12 | Theodore Henry Krueger | Chemical Assay Systems |
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