GB725862A - Improvements in or relating to artificial horizons - Google Patents

Improvements in or relating to artificial horizons

Info

Publication number
GB725862A
GB725862A GB11254/53A GB1125453A GB725862A GB 725862 A GB725862 A GB 725862A GB 11254/53 A GB11254/53 A GB 11254/53A GB 1125453 A GB1125453 A GB 1125453A GB 725862 A GB725862 A GB 725862A
Authority
GB
United Kingdom
Prior art keywords
image
plane
liquid
slit
instrument
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
GB11254/53A
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.)
Kollsman Instrument Corp
Original Assignee
Kollsman Instrument Corp
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 Kollsman Instrument Corp filed Critical Kollsman Instrument Corp
Publication of GB725862A publication Critical patent/GB725862A/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
    • G01C15/14—Artificial horizons

Abstract

725,862. Artificial horizons ; levels. KOLLSMAN INSTRUMENT CORPORATION. April 23, 1953 [Dec. 10, 1952], No. 11254/53. Class 97 (2). A horizontal reference is provided by means of an illuminated slit 16, the light rays passing through a liquid 20 and being reflected from the surface of the concave mirror 21 which forms a chamber for the liquid, and forming an image of the slit in the plane AB by reflection from the pellicle 12. The instrument itself is levelled by making the image coincide with a mark in the plane AB. For use in a sextant or for levelling an external object, a sighting system is provided comprising an objective 11 and an eye-piece 13. An image of the object (reflected from a rotatable mirror on the axis of the optical system in the case of a sextant) is formed in the plane AB and the object adjusted (or mirror rotated) until its image coincides with that of the slit. A trap 30 is provided to prevent loss of liquid should the instrument become inverted.
GB11254/53A 1952-12-10 1953-04-23 Improvements in or relating to artificial horizons Expired GB725862A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US725862XA 1952-12-10 1952-12-10

Publications (1)

Publication Number Publication Date
GB725862A true GB725862A (en) 1955-03-09

Family

ID=22108557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11254/53A Expired GB725862A (en) 1952-12-10 1953-04-23 Improvements in or relating to artificial horizons

Country Status (1)

Country Link
GB (1) GB725862A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763419A (en) * 1986-10-16 1988-08-16 Whitman Iii Hobart A Optical viewing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763419A (en) * 1986-10-16 1988-08-16 Whitman Iii Hobart A Optical viewing system

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