GB433866A - Improvements in or relating to surveying and like optical instruments - Google Patents

Improvements in or relating to surveying and like optical instruments

Info

Publication number
GB433866A
GB433866A GB543734A GB543734A GB433866A GB 433866 A GB433866 A GB 433866A GB 543734 A GB543734 A GB 543734A GB 543734 A GB543734 A GB 543734A GB 433866 A GB433866 A GB 433866A
Authority
GB
United Kingdom
Prior art keywords
telescope
sextant
tube
glass
index
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
GB543734A
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
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 Individual filed Critical Individual
Priority to GB543734A priority Critical patent/GB433866A/en
Publication of GB433866A publication Critical patent/GB433866A/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
    • G01C1/08—Sextants
    • G01C1/10—Sextants including an artificial horizon

Abstract

433,866. Sextant-type instruments. OWEN, H. E. L., 73, Perham Road, West Kensington, London. Feb. 19, 1934, No. 5437. [Class 97 (ii)] A surveying-instrument of the sextant type is adapted for attachment by axial movement to and coaxially upon the cylindrical holder of the object glass cell of a telescope, monocular or binocular viewing instrument. The cylindrical box 4, Figs. 2 and 3 of the sextant is fitted to a tubular carrier 7 arranged in line with viewing apertures and the horizon glass 1, the silvered portion of which occupies a small portion of the whole field of the telescope &c. The tube 7 is attached to the cylindrical holder of the object glass cell as by screwing or bayonet joint. The index glass is adjusted by worm gear from a milled head 17. In a modified construction the plate 3 supporting the horizon and index glasses is attached over an aperture in a length of tube 7<x>, Figs. 7 and 8, forming the carrier for attachment to the telescope &c., a lateral extension 7b being formed on the tube to accommodate the index glass.
GB543734A 1934-02-19 1934-02-19 Improvements in or relating to surveying and like optical instruments Expired GB433866A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB543734A GB433866A (en) 1934-02-19 1934-02-19 Improvements in or relating to surveying and like optical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB543734A GB433866A (en) 1934-02-19 1934-02-19 Improvements in or relating to surveying and like optical instruments

Publications (1)

Publication Number Publication Date
GB433866A true GB433866A (en) 1935-08-19

Family

ID=9796186

Family Applications (1)

Application Number Title Priority Date Filing Date
GB543734A Expired GB433866A (en) 1934-02-19 1934-02-19 Improvements in or relating to surveying and like optical instruments

Country Status (1)

Country Link
GB (1) GB433866A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953060A (en) * 1957-02-15 1960-09-20 Ilon Ind Inc Position finding device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953060A (en) * 1957-02-15 1960-09-20 Ilon Ind Inc Position finding device

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