GB368124A - Improvements in position and altitude finders - Google Patents

Improvements in position and altitude finders

Info

Publication number
GB368124A
GB368124A GB1165931A GB1165931A GB368124A GB 368124 A GB368124 A GB 368124A GB 1165931 A GB1165931 A GB 1165931A GB 1165931 A GB1165931 A GB 1165931A GB 368124 A GB368124 A GB 368124A
Authority
GB
United Kingdom
Prior art keywords
sight
scale
bar
groove
ship
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
GB1165931A
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 GB1165931A priority Critical patent/GB368124A/en
Publication of GB368124A publication Critical patent/GB368124A/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
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

368,124. Departure rules &c. LEWIS, E. H., 327, Rielle Avenue, Verdun, Quebec, Canada. April 20, 1931, No. 11659. [Class 97 (ii).] A position and altitude finder comprises a fixed scale and sight, a transverse scale slidable towards and away from the fixed sight, and a movable sight mounted on the transverse scale and adapted to be brought into line with a sighted object. In the form shown, baseboard 15 is horizontally supported on a tripod with three spaced parallel grooves 17, 18, 19 in the board 15 pointing along the ship's course when the instrument is used at sea. A bar 22 which is maintained at right-angles to the groove 17 is provided with runners 24 sliding in the grooves 17, 18, 19. When in its extreme foremost position the bar 22 lies against a stop 20 and its rear edge coincides with the zero of a scale along the groove 17. A sight pin 26 is fixed at the other end of the groove 17 and sight pins 30, 31 are mounted on blocks 28, 29 slidable along a groove in the bar 22. The bar 22 and sliding blocks 28, 29 may be movable by shafts and pinions operated by thumb screws. The distance between the sight 26 and zero mark i of the groove 17 is divided into a percentage scale and a fractional scale. The bar 22 has evenly spaced scales e, f on its back edge and on its top face a scale indicating the percentage by which the distance from the sight 26 to the graduation exceeds the distance between the sight 26 and the zero point i. A vertical graduated post carrying two adjustable sight pins may slide in the groove 17 or may be fixed to the bar 22 and is used for determining altitudes. A scale of angles around the pin 26 may be marked on the board 15. Two observations of a distant object taken with a known displacement of the instrument between the observations enable the distance of the ship from the object and the distances from the object and ship of the foot of the normal from the object on to the ship's course to be determined.
GB1165931A 1931-04-20 1931-04-20 Improvements in position and altitude finders Expired GB368124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1165931A GB368124A (en) 1931-04-20 1931-04-20 Improvements in position and altitude finders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1165931A GB368124A (en) 1931-04-20 1931-04-20 Improvements in position and altitude finders

Publications (1)

Publication Number Publication Date
GB368124A true GB368124A (en) 1932-03-03

Family

ID=9990307

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1165931A Expired GB368124A (en) 1931-04-20 1931-04-20 Improvements in position and altitude finders

Country Status (1)

Country Link
GB (1) GB368124A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320325A (en) * 1996-12-13 1998-06-17 Robert Moran Navigators aid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320325A (en) * 1996-12-13 1998-06-17 Robert Moran Navigators aid

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