GB191008821A - Improvements in Azimuth Instruments. - Google Patents

Improvements in Azimuth Instruments.

Info

Publication number
GB191008821A
GB191008821A GB191008821DA GB191008821A GB 191008821 A GB191008821 A GB 191008821A GB 191008821D A GB191008821D A GB 191008821DA GB 191008821 A GB191008821 A GB 191008821A
Authority
GB
United Kingdom
Prior art keywords
sector
wire
deviation
azimuth
compass
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
Arthur Frederick Herman Weule
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 GB191008821A publication Critical patent/GB191008821A/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)
  • Food-Manufacturing Devices (AREA)
  • Instructional Devices (AREA)
  • Finger-Pressure Massage (AREA)

Abstract

8821. Weule, A. F. H. April 12. Mariners' compasses.-An azimuth fitting for determining deviation consists of a frame A having two graduated sectors B, C and centrally mounted on the glass of the compass bowl. In use, the radial cross-wire 18 is set to indicate the known variation on the sector B, and the instrument is turned till the wire also reads S on the compass. At apparent noon, the shadow of the wire 4 should then fall on the zero of the scale on the sector, any divergence from it giving the deviation. Alternatively, the North and South may be got by observation of the sun or a star in the mirror 7 attached to a subsidiary frame 5 beneath the sector C, which is then read to give the deviation.
GB191008821D 1910-04-12 1910-04-12 Improvements in Azimuth Instruments. Expired GB191008821A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191008821T 1910-04-12

Publications (1)

Publication Number Publication Date
GB191008821A true GB191008821A (en) 1910-08-04

Family

ID=33444720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191008821D Expired GB191008821A (en) 1910-04-12 1910-04-12 Improvements in Azimuth Instruments.

Country Status (1)

Country Link
GB (1) GB191008821A (en)

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