GB472794A - Improvements in or relating to compasses - Google Patents

Improvements in or relating to compasses

Info

Publication number
GB472794A
GB472794A GB3256/37A GB325637A GB472794A GB 472794 A GB472794 A GB 472794A GB 3256/37 A GB3256/37 A GB 3256/37A GB 325637 A GB325637 A GB 325637A GB 472794 A GB472794 A GB 472794A
Authority
GB
United Kingdom
Prior art keywords
casing
disc
kjellstrom
mirror
compasses
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
GB3256/37A
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.)
ALVAR KJELLSTROEM
BJOERN KJELLSTROEM
Original Assignee
ALVAR KJELLSTROEM
BJOERN KJELLSTROEM
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 ALVAR KJELLSTROEM, BJOERN KJELLSTROEM filed Critical ALVAR KJELLSTROEM
Publication of GB472794A publication Critical patent/GB472794A/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
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/10—Comparing observed direction with north indication
    • G01C17/12—Comparing observed direction with north indication by sighting means, e.g. for surveyors' compasses

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

472,794. Magnetic compasses. KJELLSTROM, B., and KJELLSTROM, A. Feb. 3, 1937, No. 3256. Convention date, July 24, 1936. [Class 97 (ii)] A graduated disc 4 is rotatably mounted on the top of the casing 1 containing the needle 2, an index line is defined by a central mark 7 on the disc 4 and one or more marks 5 or the top of the casing 1 adjacent the graduations on the disc 4 and a mirror 9 preferably or the hinged lid 8 is provided with an aiming line 10. In a modification, a non - pivoted mirror which may be fixed in different positions relatively to the casing 1 is provided.
GB3256/37A 1936-07-24 1937-02-03 Improvements in or relating to compasses Expired GB472794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE472794X 1936-07-24

Publications (1)

Publication Number Publication Date
GB472794A true GB472794A (en) 1937-09-30

Family

ID=20310346

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3256/37A Expired GB472794A (en) 1936-07-24 1937-02-03 Improvements in or relating to compasses

Country Status (1)

Country Link
GB (1) GB472794A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007278957A (en) * 2006-04-11 2007-10-25 Chugoku Electric Power Co Inc:The Railroad angle measuring apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007278957A (en) * 2006-04-11 2007-10-25 Chugoku Electric Power Co Inc:The Railroad angle measuring apparatus

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