GB451850A - Device for determining the existence or the direction of a magnetic field - Google Patents

Device for determining the existence or the direction of a magnetic field

Info

Publication number
GB451850A
GB451850A GB69535A GB69535A GB451850A GB 451850 A GB451850 A GB 451850A GB 69535 A GB69535 A GB 69535A GB 69535 A GB69535 A GB 69535A GB 451850 A GB451850 A GB 451850A
Authority
GB
United Kingdom
Prior art keywords
coils
instrument
magnetic
field
currents
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
GB69535A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB69535A priority Critical patent/GB451850A/en
Publication of GB451850A publication Critical patent/GB451850A/en
Expired legal-status Critical Current

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
    • G01C17/28—Electromagnetic compasses

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

451,850. Magnetic measurements. CARETTA, E., 19, Corso Raffaello, Turin, Italy. Jan. 8, 1935, No. 695. [Class 37] The existence or direction of a magnetic field is indicated by its inductive effect on one or more coils wound on a magnetic core which has its reluctance varied by a periodically variable current supplied to auxiliary coils on a core part, the current in the auxiliary coils not affecting the induced current traversing the indicating instrument. Coils 2, 2a on an open magnetic circuit formed by the bars 1, la receive induced currents from the external field 6, while the coils 3, 3a on a closed magnetic circuit 8, 8a, 9, 9a forming part of the open circuit 1, la are energized from a source connected at 4, 4a. A central zero instrument can be employed, rectification of the currents in coils 2, 2a being effected by a synchronous vibrator energized by the source connected at 4, 4a, or static contact rectifiers may be used, or electrical means may be provided for neutralizing the swing of the instrument needle. Fig. 5 shows a compass with such a rectifier at 13, the induced currents being fed to a cross-coil instrument 20 to the field magnet 24 of which the compass rose 25 is secured. Orientation of the rose with respect to the field 6 is effected by pinion 27. Two closed magnetic circuits 17 may be employed.
GB69535A 1935-01-08 1935-01-08 Device for determining the existence or the direction of a magnetic field Expired GB451850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB69535A GB451850A (en) 1935-01-08 1935-01-08 Device for determining the existence or the direction of a magnetic field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB69535A GB451850A (en) 1935-01-08 1935-01-08 Device for determining the existence or the direction of a magnetic field

Publications (1)

Publication Number Publication Date
GB451850A true GB451850A (en) 1936-08-10

Family

ID=9708905

Family Applications (1)

Application Number Title Priority Date Filing Date
GB69535A Expired GB451850A (en) 1935-01-08 1935-01-08 Device for determining the existence or the direction of a magnetic field

Country Status (1)

Country Link
GB (1) GB451850A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418553A (en) * 1943-08-03 1947-04-08 Emmett M Irwin Flux measuring system
US2427654A (en) * 1940-07-30 1947-09-23 Purves Corp Remote reading flux valve compass system
US2428014A (en) * 1943-02-03 1947-09-30 Sperry Gyroscope Co Inc Concentric core flux valve
US2435276A (en) * 1942-08-14 1948-02-03 Hughes Henry & Son Ltd Magnetic field indicating means
US2438964A (en) * 1942-11-02 1948-04-06 Rca Corp Magnetic field detector
US2447496A (en) * 1944-02-03 1948-08-24 Sperry Corp Flux valve system and method of operation
US2476273A (en) * 1942-09-17 1949-07-19 Purves Corp Apparatus sensitive to magnetic fields
US2741853A (en) * 1944-08-25 1956-04-17 Wilmer C Anderson Magnetometer compass

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427654A (en) * 1940-07-30 1947-09-23 Purves Corp Remote reading flux valve compass system
US2435276A (en) * 1942-08-14 1948-02-03 Hughes Henry & Son Ltd Magnetic field indicating means
US2476273A (en) * 1942-09-17 1949-07-19 Purves Corp Apparatus sensitive to magnetic fields
US2438964A (en) * 1942-11-02 1948-04-06 Rca Corp Magnetic field detector
US2428014A (en) * 1943-02-03 1947-09-30 Sperry Gyroscope Co Inc Concentric core flux valve
US2418553A (en) * 1943-08-03 1947-04-08 Emmett M Irwin Flux measuring system
US2447496A (en) * 1944-02-03 1948-08-24 Sperry Corp Flux valve system and method of operation
US2741853A (en) * 1944-08-25 1956-04-17 Wilmer C Anderson Magnetometer compass

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