GB191213320A - A New or Improved Artificial Horizon for Sextants and like Instruments. - Google Patents

A New or Improved Artificial Horizon for Sextants and like Instruments.

Info

Publication number
GB191213320A
GB191213320A GB191213320DA GB191213320A GB 191213320 A GB191213320 A GB 191213320A GB 191213320D A GB191213320D A GB 191213320DA GB 191213320 A GB191213320 A GB 191213320A
Authority
GB
United Kingdom
Prior art keywords
sextants
instruments
new
artificial horizon
improved artificial
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
Inventor
Robert Percy Melsome
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
Application granted granted Critical
Publication of GB191213320A publication Critical patent/GB191213320A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

13,320. Melsome, R. P. June 6. Sextants.-An artificial horizon for sextants &c. consists of a weighted balance a carrying wires e<1>, e<2> for longitudinal adjustment, and a ring g carrying a wire g<2> for transverse adjustment. The balance a can oscillate about the axis b, and the ring g has ball bearings g<1> around its edge so that it can rotate about the axis of the telescope c. Correct adjustment is obtained when the images of the wires e<1>, e<2>, g<2> coincide.
GB191213320D 1912-06-06 1912-06-06 A New or Improved Artificial Horizon for Sextants and like Instruments. Expired GB191213320A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191213320T 1912-06-06

Publications (1)

Publication Number Publication Date
GB191213320A true GB191213320A (en) 1913-06-05

Family

ID=32641021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191213320D Expired GB191213320A (en) 1912-06-06 1912-06-06 A New or Improved Artificial Horizon for Sextants and like Instruments.

Country Status (1)

Country Link
GB (1) GB191213320A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005938A (en) * 1975-09-05 1977-02-01 Ho Shiaw Lei Horizon indicating device for marine sextant
US4172662A (en) * 1976-09-08 1979-10-30 Carl Zeiss Stiftung Eyepiece for measurement of lengths and angles by a microscope
US4576478A (en) * 1981-09-11 1986-03-18 Cohen Edwin J Optical instrument for measuring angles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005938A (en) * 1975-09-05 1977-02-01 Ho Shiaw Lei Horizon indicating device for marine sextant
US4172662A (en) * 1976-09-08 1979-10-30 Carl Zeiss Stiftung Eyepiece for measurement of lengths and angles by a microscope
US4576478A (en) * 1981-09-11 1986-03-18 Cohen Edwin J Optical instrument for measuring angles

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