FR2414735A1 - Appareil de detection magnetique muni d'un haut-parleur destine a former un signal audible de sortie - Google Patents

Appareil de detection magnetique muni d'un haut-parleur destine a former un signal audible de sortie

Info

Publication number
FR2414735A1
FR2414735A1 FR7900579A FR7900579A FR2414735A1 FR 2414735 A1 FR2414735 A1 FR 2414735A1 FR 7900579 A FR7900579 A FR 7900579A FR 7900579 A FR7900579 A FR 7900579A FR 2414735 A1 FR2414735 A1 FR 2414735A1
Authority
FR
France
Prior art keywords
loudspeaker
magnetic detection
output signal
detection device
device equipped
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.)
Granted
Application number
FR7900579A
Other languages
English (en)
French (fr)
Other versions
FR2414735B1 (Direct
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.)
Schonstedt Instrument Co LLC
Original Assignee
Schonstedt Instrument Co LLC
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 Schonstedt Instrument Co LLC filed Critical Schonstedt Instrument Co LLC
Publication of FR2414735A1 publication Critical patent/FR2414735A1/fr
Application granted granted Critical
Publication of FR2414735B1 publication Critical patent/FR2414735B1/fr
Granted 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
    • G01V3/15—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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Measuring Magnetic Variables (AREA)
  • Geophysics And Detection Of Objects (AREA)
FR7900579A 1978-01-11 1979-01-10 Appareil de detection magnetique muni d'un haut-parleur destine a former un signal audible de sortie Granted FR2414735A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/868,723 US4163877A (en) 1978-01-11 1978-01-11 Housing for circuitry and loudspeaker of a magnetic locator shields and resiliently mounts the loudspeaker

Publications (2)

Publication Number Publication Date
FR2414735A1 true FR2414735A1 (fr) 1979-08-10
FR2414735B1 FR2414735B1 (Direct) 1983-10-14

Family

ID=25352211

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7900579A Granted FR2414735A1 (fr) 1978-01-11 1979-01-10 Appareil de detection magnetique muni d'un haut-parleur destine a former un signal audible de sortie

Country Status (6)

Country Link
US (1) US4163877A (Direct)
JP (1) JPS54103079A (Direct)
CA (1) CA1141003A (Direct)
DE (1) DE2901163C2 (Direct)
FR (1) FR2414735A1 (Direct)
GB (1) GB2012430B (Direct)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5106175A (en) * 1989-12-28 1992-04-21 At&T Bell Laboratories Locatable object suitable for underground use and methods of locating same
US5138761A (en) * 1990-05-25 1992-08-18 Schonstedt Instrument Company Method of manufacturing magnetic detection apparatus
US5097211A (en) * 1990-05-25 1992-03-17 Schonstedt Instrument Company Magnetic detection appartaus with plastic housing and sound-transmissive handle
US5136245A (en) * 1990-05-25 1992-08-04 Schonstedt Instrument Company Magnetic detection apparatus with sensors mounted on channel or angle cantilever support
US5608810A (en) * 1994-09-02 1997-03-04 Velodyne Acoustics, Inc. Loudspeaker structure
DE29811404U1 (de) * 1998-06-25 1998-09-10 Fa. Ing. Klaus Ebinger, 51149 Köln Sondenvorrichtung
US20050067216A1 (en) * 2003-09-30 2005-03-31 Werner Schuhmann Waterproof patient handset
FR2913846B1 (fr) * 2007-03-15 2009-06-26 Haliaetus Technologies Soc Par Procede de charge aerodynamique d'un haut-parleur et dispositif de reproduction sonore faisant application
CN101588395A (zh) * 2008-05-21 2009-11-25 深圳富泰宏精密工业有限公司 具有扬声器的电子装置
US8653814B2 (en) * 2010-01-06 2014-02-18 Vrhalibis, Llc Housing for a magnetometer, a combination including a magnetometer within a waterproof housing, and a system and method for location and removal of unexploded ordinance underwater
DE202010014054U1 (de) * 2010-10-07 2011-02-17 Okm Gmbh Anordnung zum Betreiben eines handgeführten geophysikalischen Ortungsgerätes
CN102917290A (zh) * 2011-08-04 2013-02-06 富泰华工业（深圳）有限公司 耳机及其制造方法
US9042589B2 (en) * 2013-10-24 2015-05-26 Logitech Europe, S.A. Custom fit in-ear monitors utilizing a single piece driver module
US10065396B2 (en) * 2014-01-22 2018-09-04 Crucible Intellectual Property, Llc Amorphous metal overmolding
CN110418231B (zh) 2014-05-30 2021-03-09 罗技加拿大股份有限公司 一种可定制耳塞
US10869115B2 (en) 2018-01-03 2020-12-15 Logitech Europe S.A. Apparatus and method of forming a custom earpiece

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1185288A (en) * 1968-09-06 1970-03-25 Utility Tools Company Apparatus for Locating and Tracing Electrically Conductive Structures
US3662255A (en) * 1970-04-13 1972-05-09 Charles L Garrett Apparatus for locating concealed or buried metal bodies and a stable inductor usable in such detectors
FR2205671A1 (Direct) * 1972-11-03 1974-05-31 Schonstedt Instrument Co

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738419A (en) * 1952-07-26 1956-03-13 Motorola Inc Radio receiver apparatus
FR1077151A (fr) * 1953-03-25 1954-11-04 Perfectionnements aux dispositifs de haut-parleur
JPS5554068Y2 (Direct) * 1974-04-30 1980-12-15

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1185288A (en) * 1968-09-06 1970-03-25 Utility Tools Company Apparatus for Locating and Tracing Electrically Conductive Structures
US3662255A (en) * 1970-04-13 1972-05-09 Charles L Garrett Apparatus for locating concealed or buried metal bodies and a stable inductor usable in such detectors
FR2205671A1 (Direct) * 1972-11-03 1974-05-31 Schonstedt Instrument Co

Also Published As

Publication number Publication date
JPS54103079A (en) 1979-08-14
GB2012430A (en) 1979-07-25
CA1141003A (en) 1983-02-08
DE2901163C2 (de) 1983-03-24
FR2414735B1 (Direct) 1983-10-14
DE2901163A1 (de) 1979-07-12
GB2012430B (en) 1982-08-18
US4163877A (en) 1979-08-07

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Legal Events

Date Code Title Description
ST Notification of lapse