GB117641A - Improvements in Illuminating Mariners', Aeroplane, and Military Compass Cards. - Google Patents

Improvements in Illuminating Mariners', Aeroplane, and Military Compass Cards.

Info

Publication number
GB117641A
GB117641A GB601517A GB601517A GB117641A GB 117641 A GB117641 A GB 117641A GB 601517 A GB601517 A GB 601517A GB 601517 A GB601517 A GB 601517A GB 117641 A GB117641 A GB 117641A
Authority
GB
United Kingdom
Prior art keywords
mariners
illuminating
aeroplane
military
cards
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
GB601517A
Inventor
Herbert Etheridge Julyan
Einar Charles Weilbach
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 GB601517A priority Critical patent/GB117641A/en
Publication of GB117641A publication Critical patent/GB117641A/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
    • G01C17/20—Observing the compass card or needle
    • G01C17/24—Illumination

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

117,641. Julyan, H. E., and Weilbach, E. C. Nov. 16, 1917. Magnetic composses. - The illumination for reading purposes of the cards of military, aircraft, and mariners' compasses is effected by the employment of a card b having perforated lettering or figures and by providing beneath it at a fixed point, such as the lubber line, an illuminating cell consisting of upper and lower circular glass disks c, d, between which is a quantity of radium compound.
GB601517A 1917-11-16 1917-11-16 Improvements in Illuminating Mariners', Aeroplane, and Military Compass Cards. Expired GB117641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB601517A GB117641A (en) 1917-11-16 1917-11-16 Improvements in Illuminating Mariners', Aeroplane, and Military Compass Cards.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB601517A GB117641A (en) 1917-11-16 1917-11-16 Improvements in Illuminating Mariners', Aeroplane, and Military Compass Cards.

Publications (1)

Publication Number Publication Date
GB117641A true GB117641A (en) 1918-08-01

Family

ID=32670334

Family Applications (1)

Application Number Title Priority Date Filing Date
GB601517A Expired GB117641A (en) 1917-11-16 1917-11-16 Improvements in Illuminating Mariners', Aeroplane, and Military Compass Cards.

Country Status (1)

Country Link
GB (1) GB117641A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608001A (en) * 1947-09-10 1952-08-26 Sperry Corp Indicating instrument
US2803068A (en) * 1956-03-08 1957-08-20 Russell I Mason Swimmer's underwater compass

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608001A (en) * 1947-09-10 1952-08-26 Sperry Corp Indicating instrument
US2803068A (en) * 1956-03-08 1957-08-20 Russell I Mason Swimmer's underwater compass

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