CA1001256A - Static magnetic field metal detector - Google Patents

Static magnetic field metal detector

Info

Publication number
CA1001256A
CA1001256A CA151,306A CA151306A CA1001256A CA 1001256 A CA1001256 A CA 1001256A CA 151306 A CA151306 A CA 151306A CA 1001256 A CA1001256 A CA 1001256A
Authority
CA
Canada
Prior art keywords
magnetic field
static magnetic
metal detector
field metal
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
Application number
CA151,306A
Other languages
English (en)
Inventor
Clarence L. Bennett (Jr.)
Joseph D. Delorenzo
Hubert R. Durling (Jr.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unisys Corp
Original Assignee
Sperry Rand Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sperry Rand Corp filed Critical Sperry Rand Corp
Application granted granted Critical
Publication of CA1001256A publication Critical patent/CA1001256A/en
Expired legal-status Critical Current

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
    • G01V3/08—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
    • G01V3/105—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 forming directly coupled primary and secondary coils or loops
    • G01V3/107—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 forming directly coupled primary and secondary coils or loops using compensating coil or loop arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S56/00—Harvesters
    • Y10S56/15—Condition responsive

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Electromagnetism (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Harvesting Machines For Root Crops (AREA)
CA151,306A 1971-10-29 1972-09-08 Static magnetic field metal detector Expired CA1001256A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19384671A 1971-10-29 1971-10-29

Publications (1)

Publication Number Publication Date
CA1001256A true CA1001256A (en) 1976-12-07

Family

ID=22715259

Family Applications (1)

Application Number Title Priority Date Filing Date
CA151,306A Expired CA1001256A (en) 1971-10-29 1972-09-08 Static magnetic field metal detector

Country Status (6)

Country Link
US (1) US3757501A (enrdf_load_stackoverflow)
CA (1) CA1001256A (enrdf_load_stackoverflow)
DE (3) DE2265770C2 (enrdf_load_stackoverflow)
FR (1) FR2158004B1 (enrdf_load_stackoverflow)
GB (1) GB1343556A (enrdf_load_stackoverflow)
IT (1) IT966496B (enrdf_load_stackoverflow)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757501A (en) * 1971-10-29 1973-09-11 Sperry Rand Corp Static magnetic field metal detector
US3896608A (en) * 1973-06-25 1975-07-29 Sperry Rand Corp Static magnetic field metal detector
US3959953A (en) * 1974-12-04 1976-06-01 Sperry Rand Corporation Apparatus to detect the passage of ferrous material in crop harvesting machines
DE2525042C2 (de) * 1975-06-05 1985-10-10 Maschinenfabrik Fahr Ag Gottmadingen, 7702 Gottmadingen Automatische Warneinrichtung an Landmaschinen
US3972156A (en) * 1975-02-24 1976-08-03 Sperry Rand Corporation Speed-independent static magnetic field metal detector
US4243980A (en) * 1978-02-17 1981-01-06 Lichtblau G J Antenna system for electronic security installations
US4205797A (en) * 1978-10-30 1980-06-03 Sperry Corporation Magnetic clearance sensor
US4198006A (en) * 1978-10-30 1980-04-15 Sperry Corporation Magnetic clearance sensor
DE2946098A1 (de) * 1978-11-24 1980-06-04 Sperry Nv Erntemaschine
AU521875B2 (en) * 1979-07-31 1982-05-06 Matsushita Electric Industrial Co., Ltd. Induction heating
US4359686A (en) * 1980-06-30 1982-11-16 Kenneth Wherry Metal detection apparatus with basket
US4344074A (en) * 1981-04-02 1982-08-10 Sperry Corporation Magnetic field producing apparatus
US4433528A (en) 1982-08-30 1984-02-28 Sperry Corporation Metal detector apparatus
US4531118A (en) * 1983-08-29 1985-07-23 Dickey-John Corporation Metal detector
CS239075B1 (en) * 1984-04-10 1985-12-16 Karel Stastny Metallic admixtures indication device in material
DE3825109A1 (de) * 1988-07-23 1990-02-01 Truetzschler & Co Vorrichtung zum abscheiden metallischer verunreinigungen aus einer fasertransportleitung in der spinnereivorbereitung
DE3903561A1 (de) * 1989-02-07 1990-08-09 Foerster Inst Dr Friedrich Verfahren und schaelmaschine zum schaelen eines holzstammes
DE4129882C2 (de) * 1990-09-17 2002-02-07 Truetzschler Gmbh & Co Kg Vorrichtung zum Abscheiden metallischer Verunreinigungen aus einer Fasertransportstrecke in der Spinnereivorbereitung
DE4140812A1 (de) * 1991-12-11 1993-06-17 Claas Saulgau Gmbh Vorrichtung zum erkennen von ferromagnetischen fremdkoerpern, insbesondere bei erntemaschinen
DE4331849C2 (de) * 1993-09-20 1998-07-09 Deere & Co Elektronischer Schaltkreis einer Elektromagnetkupplung
US5444966A (en) * 1994-02-03 1995-08-29 New Holland North America, Inc. Metal detection apparatus for agricultural harvester
US5504428A (en) 1994-09-16 1996-04-02 Deere & Company Magnetic metal detector mounted in a feed roll of a harvisting machine
US5600942A (en) * 1995-03-31 1997-02-11 New Holland North America, Inc. Adaptive thresholding for metal detection
US5600941A (en) * 1995-03-31 1997-02-11 New Holland North America, Inc. Compensation for start-up transients
US5670882A (en) * 1995-09-21 1997-09-23 Magnawand Inc. Ferrous target identification system with magnetic field polarity and gradient indication
DE19620526A1 (de) * 1996-05-22 1997-11-27 Burkhard Weis Metalldetektor zum Erkennen von Metall im Erntegutfluß
US7024839B2 (en) * 2001-10-11 2006-04-11 Paul Wingert Agricultural bagger with upper tunnel compaction and chute agitation
DE10332395A1 (de) * 2003-07-17 2005-02-24 Maschinenfabrik Bernard Krone Gmbh Erntemaschine
US7116107B2 (en) * 2004-09-10 2006-10-03 Abitibi Geophysics Inc. Transmitter loops in series for electromagnetic geophysical surveys
US20060168913A1 (en) 2005-01-31 2006-08-03 Wingert Paul R Agricultural bagger with dual rotor and/or variable-taper tunnel
DE102005005736A1 (de) * 2005-02-07 2006-09-28 Claas Selbstfahrende Erntemaschinen Gmbh Metalldetektionseinrichtung
US7575065B1 (en) 2008-07-31 2009-08-18 Garrett Electronics, Inc. Metal detector with excavation tool
US20100321021A1 (en) * 2009-06-23 2010-12-23 Jack Alexander Siegel Metal detection excavation apparatus and method
US9347798B1 (en) 2014-12-24 2016-05-24 Garrett Electronics, Inc. Metal detector with hermetic housing
CN104718878B (zh) * 2015-04-02 2017-07-18 江苏省农业机械技术推广站 一种秸秆收获粉碎还田机
US10274630B2 (en) * 2015-06-02 2019-04-30 Syncrude Canada Ltd. In Trust For The Owners Of The Syncrude Project As Such Owners Exist Now And In The Future Tramp metal detection
US10677952B2 (en) * 2015-12-28 2020-06-09 Shenzhen Aoyadi Electronic Equipment Co., Ltd. Self-balance noise reduction metal detection double-coil
DE102017129778A1 (de) * 2017-12-13 2019-06-13 Claas Selbstfahrende Erntemaschinen Gmbh Feldhäcksler

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7104999U (de) * 1971-06-24 Bautz J Gmbh Feldhäcksler
US2550688A (en) * 1949-03-19 1951-05-01 Rca Corp Metal detection apparatus
US3084495A (en) * 1962-01-26 1963-04-09 William S Blackerby Lawn mower having magnet attached
US3368214A (en) * 1965-03-10 1968-02-06 Swanson Spray & Mfg Inc Operating shaft indicators for crop harvesting machines
US3508238A (en) * 1966-07-18 1970-04-21 Texas Instruments Inc Intrusion detection system
US3646736A (en) * 1970-01-06 1972-03-07 Frank B Hutchins Attachment for a riding-type lawnmower
US3675660A (en) * 1971-05-03 1972-07-11 Massey Ferguson Ind Ltd Combine stone trap door
US3757501A (en) * 1971-10-29 1973-09-11 Sperry Rand Corp Static magnetic field metal detector

Also Published As

Publication number Publication date
DE2265770C2 (de) 1987-01-29
DE2265809C2 (de) 1985-09-19
DE2252595A1 (de) 1973-05-03
DE2252595C2 (de) 1986-02-20
FR2158004B1 (enrdf_load_stackoverflow) 1980-04-04
US3757501A (en) 1973-09-11
IT966496B (it) 1974-02-11
GB1343556A (en) 1974-01-10
FR2158004A1 (enrdf_load_stackoverflow) 1973-06-08

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