GB596126A - Improvements in or relating to sun compasses - Google Patents

Improvements in or relating to sun compasses

Info

Publication number
GB596126A
GB596126A GB1857445A GB1857445A GB596126A GB 596126 A GB596126 A GB 596126A GB 1857445 A GB1857445 A GB 1857445A GB 1857445 A GB1857445 A GB 1857445A GB 596126 A GB596126 A GB 596126A
Authority
GB
United Kingdom
Prior art keywords
pointer
compass
plate
clamped
shadow
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
GB1857445A
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
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB596126A publication Critical patent/GB596126A/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
    • G01C17/34—Sun- or astro-compasses

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Instructional Devices (AREA)
  • Photovoltaic Devices (AREA)

Abstract

596,126. Solar compasses. POTTER, C. .July 19, 1945, No. 18574. [Class 97 (ii)] To adapt a sun compass of the kind described in Specification 557,901 for use in either hemisphere, a two-armed shadow pointer 19 is provided in place of a one-armed pointer, the time graduations reading reversely when the compass is used in the two hemispheres. In order to use the compass to maintain a set direction of travel at night, a socket 37 is provided in the index pointer 9 to accommodate the gnomon 20, normally carried by the shadow pointer 19, in a second position for observational use in conjunction with a second gnomon accommodated in socket 36 in dial plate 1 at position south or 180 degrees. The index pointer 9 is adjustably clamped to an arm 6 carried by the gimbal mountings of the compass and the dial plate 1 is clamped against the turned-over portion of arm 6 by screw means from underneath the plate 1. The pivot of the shadow pointer 19 is clamped in position against plate 1 by clamping bolt 17 accessible from above the plate.
GB1857445A 1945-07-19 Improvements in or relating to sun compasses Expired GB596126A (en)

Publications (1)

Publication Number Publication Date
GB596126A true GB596126A (en) 1947-12-29

Family

ID=1734027

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1857445A Expired GB596126A (en) 1945-07-19 Improvements in or relating to sun compasses

Country Status (1)

Country Link
GB (1) GB596126A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2191579A (en) * 1986-06-13 1987-12-16 Paul Dominic Anderson Sun compasses
US4924592A (en) * 1989-04-12 1990-05-15 Fuller George L Plate sundial with installation indicia

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2191579A (en) * 1986-06-13 1987-12-16 Paul Dominic Anderson Sun compasses
US4924592A (en) * 1989-04-12 1990-05-15 Fuller George L Plate sundial with installation indicia

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