GB104421A - Improvements in Transparent Military Protractors Applicable to Gun-Charts. - Google Patents
Improvements in Transparent Military Protractors Applicable to Gun-Charts.Info
- Publication number
- GB104421A GB104421A GB598116A GB598116A GB104421A GB 104421 A GB104421 A GB 104421A GB 598116 A GB598116 A GB 598116A GB 598116 A GB598116 A GB 598116A GB 104421 A GB104421 A GB 104421A
- Authority
- GB
- United Kingdom
- Prior art keywords
- protractors
- military
- transparent
- charts
- gun
- 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
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
Abstract
104,421. Archibold, A. W. April 26, 1916. Protractors.-A transparent military protractor for direction of artillery fire is constructed, as shown in Fig. 1, of fan shape and divided by radii and concentric arcs. The point of the fan is the zero mark. The protractor is used for superposing on a map with a view to drawing a map of a particular district upon a portion of its upper surface; or squared grids representing scales of 1/10000, 1/20000, and 1/40000 may be supplied with the protractor for attaching to its upper surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB598116A GB104421A (en) | 1916-04-26 | 1916-04-26 | Improvements in Transparent Military Protractors Applicable to Gun-Charts. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB598116A GB104421A (en) | 1916-04-26 | 1916-04-26 | Improvements in Transparent Military Protractors Applicable to Gun-Charts. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB104421A true GB104421A (en) | 1917-03-08 |
Family
ID=32245818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB598116A Expired GB104421A (en) | 1916-04-26 | 1916-04-26 | Improvements in Transparent Military Protractors Applicable to Gun-Charts. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB104421A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4351045A (en) * | 1979-07-05 | 1982-09-21 | Townshend James M | Tracking error measurement |
CN100591302C (en) * | 2008-05-01 | 2010-02-24 | 姚蔚 | Tooth axial angle protractor |
-
1916
- 1916-04-26 GB GB598116A patent/GB104421A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4351045A (en) * | 1979-07-05 | 1982-09-21 | Townshend James M | Tracking error measurement |
CN100591302C (en) * | 2008-05-01 | 2010-02-24 | 姚蔚 | Tooth axial angle protractor |
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