GB756117A - Improvements in or relating to navigational course finders - Google Patents

Improvements in or relating to navigational course finders

Info

Publication number
GB756117A
GB756117A GB2537954A GB2537954A GB756117A GB 756117 A GB756117 A GB 756117A GB 2537954 A GB2537954 A GB 2537954A GB 2537954 A GB2537954 A GB 2537954A GB 756117 A GB756117 A GB 756117A
Authority
GB
United Kingdom
Prior art keywords
upper member
course
parallel
parallel lines
finders
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
GB2537954A
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.)
BENJAMIN THOMAS HARRIES
Original Assignee
BENJAMIN THOMAS HARRIES
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 BENJAMIN THOMAS HARRIES filed Critical BENJAMIN THOMAS HARRIES
Priority to GB2537954A priority Critical patent/GB756117A/en
Publication of GB756117A publication Critical patent/GB756117A/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
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/20—Instruments for performing navigational calculations

Landscapes

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

Abstract

756,117. Protractors. HARRIES, B. T. Sept. 1, 1954, No. 25379/54. Class 97 (3). A navigational course finder comprises a base member 1 pivoted at 16 to a transparent upper member 8 which bears one or more circular scales of degrees and a series of parallel lines 13 running parallel to the zero angular marking or alternatively or additionally a series of parallel lines 14 running at right angles to the zero angular marking, the base member having a reading line through the pivot. The latter line may be one such as 5, parallel to the straight edge 2, and there may be a second reading line 7, perpendicular to the first. The upper member may have a representation of the compass points. In use, the instrument is laid on a chart 17 with the straight edge 2 along the course AB, and the upper member is rotated so that one of the parallel lines 13 coincides with one of the meridian lines 18. The direction of the course is then read off on the upper member. Specification 677,346 is referred to.
GB2537954A 1954-09-01 1954-09-01 Improvements in or relating to navigational course finders Expired GB756117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2537954A GB756117A (en) 1954-09-01 1954-09-01 Improvements in or relating to navigational course finders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2537954A GB756117A (en) 1954-09-01 1954-09-01 Improvements in or relating to navigational course finders

Publications (1)

Publication Number Publication Date
GB756117A true GB756117A (en) 1956-08-29

Family

ID=10226720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2537954A Expired GB756117A (en) 1954-09-01 1954-09-01 Improvements in or relating to navigational course finders

Country Status (1)

Country Link
GB (1) GB756117A (en)

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