GB593377A - Improvements in or relating to apparatus for detecting and/or locating by electricalmeans masses of electrically conducting or magnetic material - Google Patents
Improvements in or relating to apparatus for detecting and/or locating by electricalmeans masses of electrically conducting or magnetic materialInfo
- Publication number
- GB593377A GB593377A GB1261245A GB1261245A GB593377A GB 593377 A GB593377 A GB 593377A GB 1261245 A GB1261245 A GB 1261245A GB 1261245 A GB1261245 A GB 1261245A GB 593377 A GB593377 A GB 593377A
- Authority
- GB
- United Kingdom
- Prior art keywords
- locating
- detecting
- coils
- electricalmeans
- masses
- 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
- 239000004020 conductor Substances 0.000 title abstract 2
- 239000000696 magnetic material Substances 0.000 title 1
- 239000002184 metal Substances 0.000 abstract 2
- 239000007769 metal material Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000006011 modification reaction Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
Abstract
593,377. Locating conductors. CINEMATELEVISION, Ltd., and WEST, S. S. May 18, 1945, No. 12612. Addition to 574,808. [Class 37] An apparatus for detecting and locating metal objects whilst simultaneously ignoring the presence of a particular metallic substance, comprises two coils 20, 21, one only of which is tuned to resonance by a condenser 28 connected across the output of a valve amplifier and the other is connected across the input of the amplifier. When the coils approach a metal object, the amplifier circuit begins or ceases oscillation and a signal, heard in a pair of headphones, varies accordingly. This circuit is a modification of the circuit shown in Fig. 5 of the parent Specification in which both coils are tuned to resonance.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB593377A true GB593377A (en) | 1947-10-15 |
Family
ID=1720050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1261245A Expired GB593377A (en) | 1945-05-18 | Improvements in or relating to apparatus for detecting and/or locating by electricalmeans masses of electrically conducting or magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB593377A (en) |
-
1945
- 1945-05-18 GB GB1261245A patent/GB593377A/en not_active Expired
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