GB191225091A - A New or Improved Azimuth Fitting for a Mariner's Compass. - Google Patents

A New or Improved Azimuth Fitting for a Mariner's Compass.

Info

Publication number
GB191225091A
GB191225091A GB191225091DA GB191225091A GB 191225091 A GB191225091 A GB 191225091A GB 191225091D A GB191225091D A GB 191225091DA GB 191225091 A GB191225091 A GB 191225091A
Authority
GB
United Kingdom
Prior art keywords
mirrors
compass
fitting
mariner
new
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
Inventor
John Grandison Cowie
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
Application granted granted Critical
Publication of GB191225091A publication Critical patent/GB191225091A/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

Abstract

25,091. Cowie, J. G. Nov. 1. Mariners' compasses.-A revoluble azimuth fitting comprises primary and secondary reflectors j, k, of which the latter is so mounted in the tube m beside the lens l that an observer can see in juxtaposition the compass reading and an upright image of the object sighted by reflection in the two mirrors. The counterbalanced mirror j can be secured in any position, being preferably stiffly mounted in pivots on upstanding arms q. Screens x, y are provided and so arranged that the screen x lies between the two mirrors or between the observer and the second mirror ; in the latter case the screen y lies between the two mirrors. A shadow pin v is fitted.
GB191225091D 1912-11-01 1912-11-01 A New or Improved Azimuth Fitting for a Mariner's Compass. Expired GB191225091A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191225091T 1912-11-01

Publications (1)

Publication Number Publication Date
GB191225091A true GB191225091A (en) 1913-10-30

Family

ID=32574476

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191225091D Expired GB191225091A (en) 1912-11-01 1912-11-01 A New or Improved Azimuth Fitting for a Mariner's Compass.

Country Status (1)

Country Link
GB (1) GB191225091A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3082663A (en) * 1960-02-02 1963-03-26 Zweifel Peter Multi-purpose magnetic pocket compass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3082663A (en) * 1960-02-02 1963-03-26 Zweifel Peter Multi-purpose magnetic pocket compass

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