GB134125A - Improvements in or relating to Dials and Pointers of Indicating Apparatus and the like. - Google Patents
Improvements in or relating to Dials and Pointers of Indicating Apparatus and the like.Info
- Publication number
- GB134125A GB134125A GB42119A GB42119A GB134125A GB 134125 A GB134125 A GB 134125A GB 42119 A GB42119 A GB 42119A GB 42119 A GB42119 A GB 42119A GB 134125 A GB134125 A GB 134125A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dial
- radial
- lines
- transparent
- indicating
- 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
- G01C17/20—Observing the compass card or needle
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Abstract
134,125. Simoens, G., and Davies, W. E. Jan. 7, 1919. Magnetic compasses. -In compasses, surveying instruments and other indicating apparatus, t h e movable pointer is fixed to a transparent graduated dial and two parallel radial lines are provided one of which is formed on the transparent cover and the other on the base of the apparatus; these lines when visually coincident give the required reading of the angular position free from parallax. As shown in Fig. 1 a compass dial 1 is made of a thin sheet of celluloid, mica, or other transparent material, and the magnetic needle 2 is screwed or fixed at the centre axis 4 to the dial. The radial indicating line 3 on the base of the casing, which may be transparent, is ingrained thereon and the top radial line on the cover is made of wire or thread. The dial may be formed of a ring or rim of opaque material, the cut-away centre portion allowing the reading obtained by the radial lines to be observed. In the case of dials having two sets of graduations :for positive and negative values two sets of radial indicating lines may be provided which pass through the zeros of the two scales respectively when the dial and pointer is in the position of rest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB42119A GB134125A (en) | 1919-01-07 | 1919-01-07 | Improvements in or relating to Dials and Pointers of Indicating Apparatus and the like. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB42119A GB134125A (en) | 1919-01-07 | 1919-01-07 | Improvements in or relating to Dials and Pointers of Indicating Apparatus and the like. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB134125A true GB134125A (en) | 1919-10-30 |
Family
ID=32407342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB42119A Expired GB134125A (en) | 1919-01-07 | 1919-01-07 | Improvements in or relating to Dials and Pointers of Indicating Apparatus and the like. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB134125A (en) |
-
1919
- 1919-01-07 GB GB42119A patent/GB134125A/en not_active Expired
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