GB135994A - Improved Azimuth Mirror Fitting for Mariners' and like Compasses. - Google Patents

Improved Azimuth Mirror Fitting for Mariners' and like Compasses.

Info

Publication number
GB135994A
GB135994A GB2178718A GB2178718A GB135994A GB 135994 A GB135994 A GB 135994A GB 2178718 A GB2178718 A GB 2178718A GB 2178718 A GB2178718 A GB 2178718A GB 135994 A GB135994 A GB 135994A
Authority
GB
United Kingdom
Prior art keywords
mariners
compasses
prism
image
azimuth mirror
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
GB2178718A
Inventor
Philip Francis Everitt
Henry Alexander Hughes
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 GB2178718A priority Critical patent/GB135994A/en
Publication of GB135994A publication Critical patent/GB135994A/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)
  • Credit Cards Or The Like (AREA)
  • Toys (AREA)
  • Stereoscopic And Panoramic Photography (AREA)

Abstract

135,994. Everitt, P. F., and Hughes, H. A. Dec. 30, 1918. Mariners' compasses.-An azimuth fitting for a mariner's compass comprises an adjustable prism G for reflecting the distant object, and a halflens J adjacent to it which, in conjunction with a single or double reflection prism K, produces an image of the card above, below, or superposed on, the image of the distant object. The arrangement may be such that the image of the card is at infinity. As shown, the prism K is a doublereflection prism, and the usual shades H, a shadow pin B, and levels C are provided.
GB2178718A 1918-12-30 1918-12-30 Improved Azimuth Mirror Fitting for Mariners' and like Compasses. Expired GB135994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2178718A GB135994A (en) 1918-12-30 1918-12-30 Improved Azimuth Mirror Fitting for Mariners' and like Compasses.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2178718A GB135994A (en) 1918-12-30 1918-12-30 Improved Azimuth Mirror Fitting for Mariners' and like Compasses.

Publications (1)

Publication Number Publication Date
GB135994A true GB135994A (en) 1919-12-11

Family

ID=32409243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2178718A Expired GB135994A (en) 1918-12-30 1918-12-30 Improved Azimuth Mirror Fitting for Mariners' and like Compasses.

Country Status (1)

Country Link
GB (1) GB135994A (en)

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