GB442817A - Improvements in magnetic compasses - Google Patents
Improvements in magnetic compassesInfo
- Publication number
- GB442817A GB442817A GB1340535A GB1340535A GB442817A GB 442817 A GB442817 A GB 442817A GB 1340535 A GB1340535 A GB 1340535A GB 1340535 A GB1340535 A GB 1340535A GB 442817 A GB442817 A GB 442817A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- bowl
- clamp
- binnacle
- linwood
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supports Or Holders For Household Use (AREA)
Abstract
442,817. Magnetic compasses. JOHNSON, C. H., Linwood Works, Linwood, near Paisley. May 7, 1935, No. 13405. [Class 97 (ii)] The bowl 1 of a liquid compass is housed within a two-part clamp including a lower clamp tube 2 and an upper clamp tube 3. The clamp tubes are provided with out-turned flanges 4, 5 by means of which they are clamped together. An inturned flange 7 on the tube 3 secures the cover glass 8 and an inturned flange 6 on the tube 2 clamps a flexible diaphragm 11 against the margin 13 of the conical bottom 14 of the bowl. A flexible diaphragm 16 spaced above the diaphragm 11 forms a sealed air chamber 20 and an expansion chamber 17 communicating with the interior of the bowl through ports 18. A ring 27 rotatably mounted on the top of the tube 3 is provided with a pair of spaced parallel wires 30 and may be locked after setting by screw 33. The magnet 39 and indicating needle NS are carried by a dome 35 cut away locally at 38 to preserve the diametral continuity of the needle. The bowl is supported within a binnacle 21 by lozenge-shaped spongerubber pads 22 interposed between the flanges 4, 5, and a shelf 23 on the binnacle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1340535A GB442817A (en) | 1935-05-07 | 1935-05-07 | Improvements in magnetic compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1340535A GB442817A (en) | 1935-05-07 | 1935-05-07 | Improvements in magnetic compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB442817A true GB442817A (en) | 1936-02-17 |
Family
ID=10022355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1340535A Expired GB442817A (en) | 1935-05-07 | 1935-05-07 | Improvements in magnetic compasses |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB442817A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2157435A (en) * | 1984-04-13 | 1985-10-23 | Suunto Oy | Vibration attenuator |
| GB2245063A (en) * | 1990-06-11 | 1991-12-18 | Sisteco Limited Oy | Compass |
-
1935
- 1935-05-07 GB GB1340535A patent/GB442817A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2157435A (en) * | 1984-04-13 | 1985-10-23 | Suunto Oy | Vibration attenuator |
| AU580286B2 (en) * | 1984-04-13 | 1989-01-12 | Suunto Oy | Vibration attenuator |
| GB2245063A (en) * | 1990-06-11 | 1991-12-18 | Sisteco Limited Oy | Compass |
| GB2245063B (en) * | 1990-06-11 | 1994-05-11 | Sisteco Limited Oy | Compass |
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