FI845043L - Fjaerrkompass. - Google Patents

Fjaerrkompass.

Info

Publication number
FI845043L
FI845043L FI845043A FI845043A FI845043L FI 845043 L FI845043 L FI 845043L FI 845043 A FI845043 A FI 845043A FI 845043 A FI845043 A FI 845043A FI 845043 L FI845043 L FI 845043L
Authority
FI
Finland
Prior art keywords
fjaerrkompass
Prior art date
Application number
FI845043A
Other languages
English (en)
Other versions
FI77932C (fi
FI845043A0 (fi
FI77932B (fi
Inventor
Hannu Purhonen
Risto Tanner
Original Assignee
Hannu Purhonen
Risto Tanner
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 Hannu Purhonen, Risto Tanner filed Critical Hannu Purhonen
Priority to FI845043A priority Critical patent/FI77932C/fi
Publication of FI845043A0 publication Critical patent/FI845043A0/fi
Priority to US06/810,913 priority patent/US4640016A/en
Priority to GB08531119A priority patent/GB2169085A/en
Priority to DE19853544877 priority patent/DE3544877A1/de
Priority to FR8518885A priority patent/FR2574927A1/fr
Publication of FI845043L publication Critical patent/FI845043L/fi
Application granted granted Critical
Publication of FI77932B publication Critical patent/FI77932B/fi
Publication of FI77932C publication Critical patent/FI77932C/fi

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/20—Observing the compass card or needle
    • G01C17/26—Observing the compass card or needle using electric pick-offs for transmission to final indicator, e.g. photocell

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Navigation (AREA)
  • Geophysics And Detection Of Objects (AREA)
FI845043A 1984-12-19 1984-12-19 Fjaerrkompass. FI77932C (fi)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FI845043A FI77932C (fi) 1984-12-19 1984-12-19 Fjaerrkompass.
US06/810,913 US4640016A (en) 1984-12-19 1985-12-18 Means for indicating direction and a method of determining a direction
GB08531119A GB2169085A (en) 1984-12-19 1985-12-18 Direction indicating apparatus
DE19853544877 DE3544877A1 (de) 1984-12-19 1985-12-18 Richtungsanzeiger und ein verfahren zur richtungsbestimmung
FR8518885A FR2574927A1 (fr) 1984-12-19 1985-12-19 Procede et dispositif pour determiner et indiquer une direction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI845043 1984-12-19
FI845043A FI77932C (fi) 1984-12-19 1984-12-19 Fjaerrkompass.

Publications (4)

Publication Number Publication Date
FI845043A0 FI845043A0 (fi) 1984-12-19
FI845043L true FI845043L (fi) 1986-06-20
FI77932B FI77932B (fi) 1989-01-31
FI77932C FI77932C (fi) 1989-05-10

Family

ID=8520086

Family Applications (1)

Application Number Title Priority Date Filing Date
FI845043A FI77932C (fi) 1984-12-19 1984-12-19 Fjaerrkompass.

Country Status (5)

Country Link
US (1) US4640016A (fi)
DE (1) DE3544877A1 (fi)
FI (1) FI77932C (fi)
FR (1) FR2574927A1 (fi)
GB (1) GB2169085A (fi)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3639208A1 (de) * 1986-11-15 1988-05-19 Bosch Gmbh Robert Magnetoresistiver sensor zur abgabe von elektrischen signalen
GB8818136D0 (en) * 1988-07-29 1988-09-01 Plessey Co Plc Rotation sensor
US5435070A (en) * 1993-07-26 1995-07-25 Honeywell Inc. Simplified compass with multiple segment display capability
US5600611A (en) * 1995-10-04 1997-02-04 Timex Corporation Wrist mountable compass
US5850624A (en) * 1995-10-18 1998-12-15 The Charles Machine Works, Inc. Electronic compass
WO1999011999A1 (en) * 1996-03-05 1999-03-11 Harri Saario Method and apparatus for measuring rotation motion
US6166539A (en) * 1996-10-30 2000-12-26 Regents Of The University Of Minnesota Magnetoresistance sensor having minimal hysteresis problems
US5747997A (en) * 1996-06-05 1998-05-05 Regents Of The University Of Minnesota Spin-valve magnetoresistance sensor having minimal hysteresis problems
US5924212A (en) * 1996-10-09 1999-07-20 Donnelly Corporation Electronic compass
EP0855599A3 (de) * 1997-01-24 2001-05-02 Siemens Aktiengesellschaft Elektronischer Kompass
US6301794B1 (en) * 1999-05-27 2001-10-16 Johnson Controls, Inc. Vehicle compass system with continuous automatic calibration
US6286220B1 (en) * 1999-11-30 2001-09-11 Directional Robotics, Inc. Reflective compass device
CN102243076B (zh) * 2011-04-19 2014-06-04 黄金闪 一种航海气垫液体磁罗经

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1046832B (it) * 1972-08-21 1980-07-31 Siemens Ag Disposizione di resistenza dipendente dal campo magnetico
DK139006B (da) * 1976-02-19 1978-11-27 Ib Thomsen Detektor til afføling af vinkelstillingen for en til et magnetkompas hørende kompasmagnets stilling.
US4088977A (en) * 1977-02-02 1978-05-09 Illinois Tool Works Inc. Contactless linear position sensor
JPS54148578A (en) * 1978-04-18 1979-11-20 Nec Corp Rotating direction detector
GB2071333B (en) * 1980-02-22 1984-02-01 Sony Corp Magnetic sensor device
JPS5828611A (ja) * 1981-08-13 1983-02-19 Alps Electric Co Ltd 磁気式方位検出装置
JPS58167914A (ja) * 1982-03-29 1983-10-04 Kangiyou Denki Kiki Kk 磁気抵抗素子
DE3244891C2 (de) * 1982-12-04 1985-07-11 Angewandte Digital Elektronik Gmbh, 2051 Brunstorf Einrichtung zur berührungslosen Positionsmessung
GB2143328A (en) * 1983-06-24 1985-02-06 Penny & Giles Potentionmeters Rotary direction transmitters using three Hall effect devices

Also Published As

Publication number Publication date
FI77932C (fi) 1989-05-10
DE3544877A1 (de) 1986-06-19
GB2169085A (en) 1986-07-02
US4640016A (en) 1987-02-03
FI845043A0 (fi) 1984-12-19
FR2574927A1 (fr) 1986-06-20
FI77932B (fi) 1989-01-31
GB8531119D0 (en) 1986-01-29

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: TANNER, RISTO

Owner name: PURHONEN, HANNU