GB445310A - Improvements in or relating to azimuth circles - Google Patents

Improvements in or relating to azimuth circles

Info

Publication number
GB445310A
GB445310A GB3286934A GB3286934A GB445310A GB 445310 A GB445310 A GB 445310A GB 3286934 A GB3286934 A GB 3286934A GB 3286934 A GB3286934 A GB 3286934A GB 445310 A GB445310 A GB 445310A
Authority
GB
United Kingdom
Prior art keywords
compass
prism
approximately
horizontal
graduations
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
GB3286934A
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.)
BURTON MORTIMER GREEN
Original Assignee
BURTON MORTIMER GREEN
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 BURTON MORTIMER GREEN filed Critical BURTON MORTIMER GREEN
Priority to GB3286934A priority Critical patent/GB445310A/en
Publication of GB445310A publication Critical patent/GB445310A/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
    • G01C1/00—Measuring angles

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Telescopes (AREA)
  • Lenses (AREA)

Abstract

445,310. Azimuth fitting. GREEN, B. M., 900, New York Avenue, Brooklyn, New York, U.S.A. Nov. 15. 1934, No. 32869. [Classes 97 (i) and 97 (ii)] An azimuth fitting for a compass comprises a support carried on the compass and rotatable about the axis of the compass, and carrying a pair of prisms mounted close together on the side of the support remote from the observer, one prism being pivoted about a horizontal axis and arranged to give a reflected image of the sighted object, and the other arranged to give an erect reflected image of the compass graduations in the line of sight extending diametrically across the compass. The prism housing mounted on the ring C which is rotatably held on the compass A by flange C<1> comprises two side plates E<1> between which the erecting reflecting prism G is mounted and which carry a foresight K hinged at K', the back sight D being mounted on the opposite side of ring C and hinged at D<1>. Prism G, which rests against a back-plate E<2>, may be a symmetrical foresided prism having an angle of approximately 135‹ at its apex, angles of approximately 45‹ at the ends of its base and the remaining angles each approximately 157¢‹, and is arranged so that a vertical ray of light impinging on the horizontal surface G<3> emerges from the surface G<2> in an approximately horizontal direction after reflection successively at surfaces G<1>, G<5> G<4>, G<1>, these surfaces being inclined to the horizontal at angles of approximately 45‹, 22¢‹, 67¢‹ and 45‹ respectively. A level N is held adjacent the surface G' by brackets N<1> and is observed in the same field of view as the compass graduations. The image of the object to be observed is brought into coincidence with the image of the graduations by the reflecting prism F carried on a frame J rotatable on horizontal spindles J<1> by milled heads J<6>, the axis of rotation passing through the upper end of prism G. Transparent colour screens L, M attached to arms L<1>, M<1> pivoted on the sides E<1> can be rotated into the light beam from the object to prevent dazzling of the observer. The sights K and D may be fitted with suitable detachable magnifying lenses, and an adjustable cover is provided for the apparatus.
GB3286934A 1934-11-15 1934-11-15 Improvements in or relating to azimuth circles Expired GB445310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3286934A GB445310A (en) 1934-11-15 1934-11-15 Improvements in or relating to azimuth circles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3286934A GB445310A (en) 1934-11-15 1934-11-15 Improvements in or relating to azimuth circles

Publications (1)

Publication Number Publication Date
GB445310A true GB445310A (en) 1936-04-07

Family

ID=10345228

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3286934A Expired GB445310A (en) 1934-11-15 1934-11-15 Improvements in or relating to azimuth circles

Country Status (1)

Country Link
GB (1) GB445310A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100683A2 (en) * 1982-08-02 1984-02-15 S.G. Brown Limited Apparatus for taking azimuth sights
GB2204401A (en) * 1987-03-30 1988-11-09 Indep Broadcasting Authority Direction finding

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100683A2 (en) * 1982-08-02 1984-02-15 S.G. Brown Limited Apparatus for taking azimuth sights
EP0100683A3 (en) * 1982-08-02 1984-03-21 S.G. Brown Limited Apparatus for taking azimuth sights
GB2204401A (en) * 1987-03-30 1988-11-09 Indep Broadcasting Authority Direction finding

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