GB1054248A - Proximity Detector - Google Patents
Proximity DetectorInfo
- Publication number
- GB1054248A GB1054248A GB3270562A GB3270562A GB1054248A GB 1054248 A GB1054248 A GB 1054248A GB 3270562 A GB3270562 A GB 3270562A GB 3270562 A GB3270562 A GB 3270562A GB 1054248 A GB1054248 A GB 1054248A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- proximity detector
- aug
- relay
- detector
- 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
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/265—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K17/955—Proximity switches using a capacitive detector
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Electronic Switches (AREA)
Abstract
1, 054, 248. Proximity detector. BURNDEPT Ltd. Aug. 26, 1963 [ Aug. 24, 1962], No. 32705/62. Heading G1N. [ Also in Division H3] A Piezo-electric crystal 20 may be inserted in the oscillator circuit of an electronic proximity detector either where shown or in jack 22, so that the circuit will oscillate either because of the presence or because of the absence of material (e. g. water) in the neighbourhood of a capacitive probe connected to a socket 18 in an L-C circuit 12, 14, 16. When the circuit oscillates, a voltage is produced across a coil 32 and a transistor 30 energizes a relay 40. The detector may be made to "fail safe" by arranging that a danger condition which it is to detect shall lead to de-energizing of the relay.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3270562A GB1054248A (en) | 1962-08-24 | 1962-08-24 | Proximity Detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3270562A GB1054248A (en) | 1962-08-24 | 1962-08-24 | Proximity Detector |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1054248A true GB1054248A (en) | 1967-01-04 |
Family
ID=1758029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3270562A Expired GB1054248A (en) | 1962-08-24 | 1962-08-24 | Proximity Detector |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1054248A (en) |
-
1962
- 1962-08-24 GB GB3270562A patent/GB1054248A/en not_active Expired
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