GB1299183A - Improvements relating to surveying instruments - Google Patents
Improvements relating to surveying instrumentsInfo
- Publication number
- GB1299183A GB1299183A GB4417569A GB4417569A GB1299183A GB 1299183 A GB1299183 A GB 1299183A GB 4417569 A GB4417569 A GB 4417569A GB 4417569 A GB4417569 A GB 4417569A GB 1299183 A GB1299183 A GB 1299183A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- surveying instruments
- adjusting
- improvements relating
- receiving coil
- 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
- 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
- G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat
-
- 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
- G01V3/108—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 the emitter and the receiver coils or loops being uncoupled by positioning them perpendicularly to each other
-
- 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
- G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Electromagnetism (AREA)
- Geophysics And Detection Of Objects (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
1299183 Surveying instruments ELECTROLOCATION Ltd 27 July 1970 [6 Sept 1969] 44175/69 Heading G1N In an instrument for detecting underground objects comprising a transmitting coil 12 and a receiving coil 17 mounted at right-angles thereto, each coil has a ferrite core. The meter 23 may be calibrated to zero over free ground by adjusting the angle of coil 12 by screws 19 as a coarse adjustment, and, as a fine adjustment, by adjusting a proportion of the output of a ferrite cored choke 20 supplied to the receiving coil in antiphase. Reference has been directed by the Comptroller to Specification 1087216. (For Figures, see next page)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4417569A GB1299183A (en) | 1969-09-06 | 1969-09-06 | Improvements relating to surveying instruments |
DE19702041079 DE2041079A1 (en) | 1969-09-06 | 1970-08-19 | Surveying instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4417569A GB1299183A (en) | 1969-09-06 | 1969-09-06 | Improvements relating to surveying instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1299183A true GB1299183A (en) | 1972-12-06 |
Family
ID=10432122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4417569A Expired GB1299183A (en) | 1969-09-06 | 1969-09-06 | Improvements relating to surveying instruments |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE2041079A1 (en) |
GB (1) | GB1299183A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4053828A (en) * | 1976-05-03 | 1977-10-11 | Xonics, Inc. | Metal detector with first and second nested rectangular coils |
US4070625A (en) * | 1976-09-14 | 1978-01-24 | Dravo Corporation | Apparatus for measuring the distance to the floor of the cargo hold of a ship through intervening bulk material |
US4295095A (en) * | 1979-01-29 | 1981-10-13 | British Gas Corporation | Apparatus and method for detecting the location of metallic objects having alternating current passing therethrough |
US4348639A (en) * | 1979-05-18 | 1982-09-07 | Triple Dee Electronics Inc. | Transmitter-receiver loop buried metal object locator with switch controlled reference voltage |
GB2149919A (en) * | 1983-11-18 | 1985-06-19 | Charles Norman Smyth | Metal detector |
US4982163A (en) * | 1986-08-27 | 1991-01-01 | Aerius Oy | Method and a device for the determination of the condition of the insulation of an object coated with an electric insulation |
US5863445A (en) * | 1997-03-27 | 1999-01-26 | Control Screening L.L.C. | Etched coil unibody digital detector |
-
1969
- 1969-09-06 GB GB4417569A patent/GB1299183A/en not_active Expired
-
1970
- 1970-08-19 DE DE19702041079 patent/DE2041079A1/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4053828A (en) * | 1976-05-03 | 1977-10-11 | Xonics, Inc. | Metal detector with first and second nested rectangular coils |
US4070625A (en) * | 1976-09-14 | 1978-01-24 | Dravo Corporation | Apparatus for measuring the distance to the floor of the cargo hold of a ship through intervening bulk material |
US4295095A (en) * | 1979-01-29 | 1981-10-13 | British Gas Corporation | Apparatus and method for detecting the location of metallic objects having alternating current passing therethrough |
US4348639A (en) * | 1979-05-18 | 1982-09-07 | Triple Dee Electronics Inc. | Transmitter-receiver loop buried metal object locator with switch controlled reference voltage |
GB2149919A (en) * | 1983-11-18 | 1985-06-19 | Charles Norman Smyth | Metal detector |
US4982163A (en) * | 1986-08-27 | 1991-01-01 | Aerius Oy | Method and a device for the determination of the condition of the insulation of an object coated with an electric insulation |
US5863445A (en) * | 1997-03-27 | 1999-01-26 | Control Screening L.L.C. | Etched coil unibody digital detector |
Also Published As
Publication number | Publication date |
---|---|
DE2041079A1 (en) | 1972-01-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |