GB445312A - Improvements in and relating to compasses - Google Patents

Improvements in and relating to compasses

Info

Publication number
GB445312A
GB445312A GB35597/34A GB3559734A GB445312A GB 445312 A GB445312 A GB 445312A GB 35597/34 A GB35597/34 A GB 35597/34A GB 3559734 A GB3559734 A GB 3559734A GB 445312 A GB445312 A GB 445312A
Authority
GB
United Kingdom
Prior art keywords
casing
protuberance
ruler
dec
hub
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
GB35597/34A
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.)
HENNING RUDOLF EKEBERG
Original Assignee
HENNING RUDOLF EKEBERG
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 HENNING RUDOLF EKEBERG filed Critical HENNING RUDOLF EKEBERG
Publication of GB445312A publication Critical patent/GB445312A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sewing Machines And Sewing (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

445,312. Magnetic compasses. TILLANDER, G., 3, Rosvõgen, Stocksund, and EKEBERG, H. R., 14, Valhallavõgen, Stockholm, both in Sweden. Dec. 11, 1934, No. 35597. Convention date, Dec. 11, 1933. [Class 97 (ii)] The liquid-filled casing of a magnetic compass is made wholly of resilient material. In the form shown the interior of the transparent celluloid casing 1 has, for the purpose of reducing rotation of the contained liquid, stationary ribs 2, which also form a central recess for receiving the hub of the needle 3. The latter comprises two aligned magnets held together by the hub which carries a stone normally resting on a pivot pin 7 secured in a conical protuberance 6 attached to the bottom of the casing 1. The protuberance 6 is surrounded by a ring 4, with a conical aperture so that when the compass is inclined the ring 4 slides along the protuberance 6 against the action of a weak spring 5 and lifts the needle 3 from the pin 7. An outer casing 11 with windows 12 and a recess 20 in the bottom surrounds the casing 1 and is pivotally secured to a transparent ruler 8 by a screw 9. The casing 11 has diametrical mark 15, which may be set to align with a longitudinal line 13 on the ruler 8, a scale 14 for setting the declination, and two lines 16 on either side of and parallel to the line 15. The side of the casing 11 facing the ruler 8 may be graduated in degrees.
GB35597/34A 1933-12-11 1934-12-11 Improvements in and relating to compasses Expired GB445312A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE445312X 1933-12-11

Publications (1)

Publication Number Publication Date
GB445312A true GB445312A (en) 1936-04-07

Family

ID=20310020

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35597/34A Expired GB445312A (en) 1933-12-11 1934-12-11 Improvements in and relating to compasses

Country Status (1)

Country Link
GB (1) GB445312A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446568A (en) * 1944-05-16 1948-08-10 Wolfe Lester Magnetic compass
US2487044A (en) * 1945-10-01 1949-11-08 William C Cude Compass
US2528339A (en) * 1945-11-23 1950-10-31 Collins Reginald Cruiser's compass
US2824382A (en) * 1953-08-17 1958-02-25 Sandberg Nils Henry Compasses
US4462164A (en) * 1981-01-12 1984-07-31 Norman Erik B Orienteering compass
GB2348704A (en) * 1999-04-07 2000-10-11 Alexander Goodlet A hiking compass

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446568A (en) * 1944-05-16 1948-08-10 Wolfe Lester Magnetic compass
US2487044A (en) * 1945-10-01 1949-11-08 William C Cude Compass
US2528339A (en) * 1945-11-23 1950-10-31 Collins Reginald Cruiser's compass
US2824382A (en) * 1953-08-17 1958-02-25 Sandberg Nils Henry Compasses
US4462164A (en) * 1981-01-12 1984-07-31 Norman Erik B Orienteering compass
GB2348704A (en) * 1999-04-07 2000-10-11 Alexander Goodlet A hiking compass

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