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Liquid compass
Liquid compass.
Bowl: Dark green painted brass, glazed bottom. Inside of bowl painted white with four black painted lubber lines. Mounted in brass gimbal ring 9.4" (24.0 cm)
Card: Diameter 7.1" (18.0 cm). Paper of the Kelvin light dry type, gradusted to 1/4 points. The N point is indicated by an 'Owl'.
Needle: Six needle magnets suspended below card on a thread framework in the Kelvin manner.
Pivot: Brass pivot stem fitted with a steel pivot point is attached to centre of bottom glass. The pivot point engages in jewelled pivot cup carried at the centre of the card.
O.A. Height 4.0" (10.2 cm)
Bowl: Dark green painted brass, glazed bottom. Inside of bowl painted white with four black painted lubber lines. Mounted in brass gimbal ring 9.4" (24.0 cm)
Card: Diameter 7.1" (18.0 cm). Paper of the Kelvin light dry type, gradusted to 1/4 points. The N point is indicated by an 'Owl'.
Needle: Six needle magnets suspended below card on a thread framework in the Kelvin manner.
Pivot: Brass pivot stem fitted with a steel pivot point is attached to centre of bottom glass. The pivot point engages in jewelled pivot cup carried at the centre of the card.
O.A. Height 4.0" (10.2 cm)
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Object Details
| ID: | ACO0508 |
|---|---|
| Type: | Liquid compass |
| Display location: | Not on display |
| Creator: | Johansson, C. |
| Date made: | circa 1935 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 100 mm x 315 mm x 235 mm |
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