GB968640A - Improvements in or relating to surveying instruments - Google Patents

Improvements in or relating to surveying instruments

Info

Publication number
GB968640A
GB968640A GB2696062A GB2696062A GB968640A GB 968640 A GB968640 A GB 968640A GB 2696062 A GB2696062 A GB 2696062A GB 2696062 A GB2696062 A GB 2696062A GB 968640 A GB968640 A GB 968640A
Authority
GB
United Kingdom
Prior art keywords
lid
mirror
target
box
point
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
GB2696062A
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.)
STANLEY HORACE FREDERICK SARL
Original Assignee
STANLEY HORACE FREDERICK SARL
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 STANLEY HORACE FREDERICK SARL filed Critical STANLEY HORACE FREDERICK SARL
Priority to GB2696062A priority Critical patent/GB968640A/en
Publication of GB968640A publication Critical patent/GB968640A/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
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/10—Plumb lines
    • G01C15/105—Optical plumbing

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Telescopes (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

968, 640. Sighting instruments. S.H.F. SARL. July 12, 1963 [July 13, 1962], No. 26960/62. Heading G1F. A surveying instrument comprises an opentopped box 1 with a detachable lid 2, a mirror 10 being adjustably mounted substantially horizontally in the box 1 with a spirit level 11 on its mounting enabling the mirror to be adjusted to a true horizontal position, the lid 2 having a target 14 marked thereon on its underside the target being of identical shape to that of the mirror 10, and having twice the linear dimensions thereof, the target having a central aperture 15 which also passes through the lid. The mirror is mounted in a table 8 and has a central spot-target 20. The table 8 is mounted on a ball and socket joint 6, 7, and carries a mounting 12 for the spirit level 11, the mounting being adjustable relative to the table by screws 13 in calibrating the instrument. In use, if it is desired to locate a point B on a beam 16 vertically above a point A on a beam 17, then an arrow 18 on the table 8 is placed adjacent the point A, the table having been previously levelled using the level 11. The lid 2 is placed adjacent the beam 16 and the image 14<1> of the target 14 is viewed through the aperture 15. The lid 2 is manipulated until the image 14<1> is framed exactly by the mirror 10. An arrow 19 on the lid 2 then indicates the point B. The mounting for the table may alternatively use levelling screws, a lockable gimbal system, or a free suspension system for the table with suitable damping. The centre of the mirror may be transparent and the base of the box 1 may have a corresponding hole so that a ground point may be seen from above. The box and lid may be of any shape provided the target 14 is twice the size of the mirror 10. The target 14 may be luminous, and a telescope may be fitted over the aperture 15. The box and lid may each be provided with an extensible rule to enable the box or lid to be spaced a known distance from a wall.
GB2696062A 1962-07-13 1962-07-13 Improvements in or relating to surveying instruments Expired GB968640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2696062A GB968640A (en) 1962-07-13 1962-07-13 Improvements in or relating to surveying instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2696062A GB968640A (en) 1962-07-13 1962-07-13 Improvements in or relating to surveying instruments

Publications (1)

Publication Number Publication Date
GB968640A true GB968640A (en) 1964-09-02

Family

ID=10251905

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2696062A Expired GB968640A (en) 1962-07-13 1962-07-13 Improvements in or relating to surveying instruments

Country Status (1)

Country Link
GB (1) GB968640A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589014A (en) * 1966-01-20 1971-06-29 Stanley Horace Frederick Sarl Surveying instruments
EP2284546A3 (en) * 2009-07-30 2011-07-06 Research In Motion Limited Method and system for testing and calibrating an accelerometer of an electronic device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589014A (en) * 1966-01-20 1971-06-29 Stanley Horace Frederick Sarl Surveying instruments
EP2284546A3 (en) * 2009-07-30 2011-07-06 Research In Motion Limited Method and system for testing and calibrating an accelerometer of an electronic device
US8626471B2 (en) 2009-07-30 2014-01-07 Blackberry Limited Method and system for testing and calibrating an accelerometer of an electronic device
US8909498B2 (en) 2009-07-30 2014-12-09 Blackberry Limited Method and system for testing and calibrating an accelerometer of an electronic device

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