GB368124A - Improvements in position and altitude finders - Google Patents
Improvements in position and altitude findersInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2320325A (en) * | 1996-12-13 | 1998-06-17 | Robert Moran | Navigators aid |
-
1931
- 1931-04-20 GB GB1165931A patent/GB368124A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2320325A (en) * | 1996-12-13 | 1998-06-17 | Robert Moran | Navigators aid |
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