GB191503122A - Improvements in or connected with Magnetic Compasses. - Google Patents
Improvements in or connected with Magnetic Compasses.Info
- Publication number
- GB191503122A GB191503122A GB191503122DA GB191503122A GB 191503122 A GB191503122 A GB 191503122A GB 191503122D A GB191503122D A GB 191503122DA GB 191503122 A GB191503122 A GB 191503122A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pin
- sighting
- dial
- compass
- newman
- 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
- G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
- G01C17/02—Magnetic compasses
- G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
- G01C17/10—Comparing observed direction with north indication
- G01C17/12—Comparing observed direction with north indication by sighting means, e.g. for surveyors' compasses
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Telescopes (AREA)
Abstract
3122. Newman, A. S., and Newman & Sinclair. Feb. 26. Prismatic compasses. - A compass is provided with a telescope mounted diametrically over the dial and having a sighting-pin and a mirror or prism so as to view the object and the figures on the dial together in focus with the pin. A tube c carrying the eye lens d, object lens d', and sighting- pin c<1> is mounted diametrically over the compass case a and carries a mirror or prism e having two silvered surfaces e<2>, e<3>, so that the figures on the compass dial a<2> are viewed erect through the eye lens d in focus with the sighting-pin and the object. The object is seen inverted, but the tube may be provided with an erecting telescopic eyepiece so as to give a magnified erect image of the object.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191503122T | 1915-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191503122A true GB191503122A (en) | 1916-02-24 |
Family
ID=32649112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191503122D Expired GB191503122A (en) | 1915-02-26 | 1915-02-26 | Improvements in or connected with Magnetic Compasses. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB191503122A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2970510A (en) * | 1959-02-20 | 1961-02-07 | Edward F Mixner | Combined sight tube and magnetic compass |
-
1915
- 1915-02-26 GB GB191503122D patent/GB191503122A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2970510A (en) * | 1959-02-20 | 1961-02-07 | Edward F Mixner | Combined sight tube and magnetic compass |
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