GB210612A - A composite instrument for surveying - Google Patents

A composite instrument for surveying

Info

Publication number
GB210612A
GB210612A GB148523A GB148523A GB210612A GB 210612 A GB210612 A GB 210612A GB 148523 A GB148523 A GB 148523A GB 148523 A GB148523 A GB 148523A GB 210612 A GB210612 A GB 210612A
Authority
GB
United Kingdom
Prior art keywords
sighting
instrument
observer
line
mirror
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
GB148523A
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.)
ALBERT WILLIAM LUCY
Original Assignee
ALBERT WILLIAM LUCY
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 ALBERT WILLIAM LUCY filed Critical ALBERT WILLIAM LUCY
Priority to GB148523A priority Critical patent/GB210612A/en
Publication of GB210612A publication Critical patent/GB210612A/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00—Measuring angles
    • G01C1/08—Sextants

Abstract

210,612. Lucy, A. W. Jan. 17, 1923. Angle-measuring instruments; clinometers.-An instrument of the type in which sights B, Care provided to define the line from the observer to a distant object, and in which a mirror E attached to an arm moving over a graduated scale D is adjustable about a central axis F to reflect a second object to the observer's eye, is adapted for use as a clinometer by the provision of a member H mounted to hang freely from the axis F, such member carrying a sighting line H<1> which, in conjunction with an axial line on the mirror, serves to define a vertical datum plane. To enable the observer to maintain the direct and reflected sighting lines in a vertical plane the member H may carry a spirit level arranged to be observed bv reflection in the mirror during the sighting. The instrument may be provided with a straight edge for use as an alidade. The instrument may also be enclosed and may be provided with fixed mirrors for deflecting the direct sighting line, thus decreasing the distance between the sights.
GB148523A 1923-01-17 1923-01-17 A composite instrument for surveying Expired GB210612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB148523A GB210612A (en) 1923-01-17 1923-01-17 A composite instrument for surveying

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB148523A GB210612A (en) 1923-01-17 1923-01-17 A composite instrument for surveying

Publications (1)

Publication Number Publication Date
GB210612A true GB210612A (en) 1924-02-07

Family

ID=9722828

Family Applications (1)

Application Number Title Priority Date Filing Date
GB148523A Expired GB210612A (en) 1923-01-17 1923-01-17 A composite instrument for surveying

Country Status (1)

Country Link
GB (1) GB210612A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644993A (en) * 1950-05-04 1953-07-14 Humbert R Rogant Line holder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644993A (en) * 1950-05-04 1953-07-14 Humbert R Rogant Line holder

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