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Liquid compass
Liquid compass
Bowl: Brown painted brass. Inside of bowl white with two lubber lines painted on side. A heavy balancing weight fitted in bottom. Mounted in gimbal ring 6.8" (17.5 cm)
Card: Diameter 5" (12.7 cm) Mica covered with paper, white with black markings, graduated to 1/4 points. Underside of card is fitted with a black painted brass plate carrying the needles and the pivot cap.
Needle: Two magnets of circular section 3.5" (9.0 cm) long attached to card by a brass plate.
Pivot: Jewelled pivot cup, carried at centre of card, rests on a steel pivot point which is mounted in a brass stem secured to base of bowl.
O.A. Height 3.75" (9.5 cm)
Bowl: Brown painted brass. Inside of bowl white with two lubber lines painted on side. A heavy balancing weight fitted in bottom. Mounted in gimbal ring 6.8" (17.5 cm)
Card: Diameter 5" (12.7 cm) Mica covered with paper, white with black markings, graduated to 1/4 points. Underside of card is fitted with a black painted brass plate carrying the needles and the pivot cap.
Needle: Two magnets of circular section 3.5" (9.0 cm) long attached to card by a brass plate.
Pivot: Jewelled pivot cup, carried at centre of card, rests on a steel pivot point which is mounted in a brass stem secured to base of bowl.
O.A. Height 3.75" (9.5 cm)
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Object Details
| ID: | ACO0529 |
|---|---|
| Type: | Liquid compass |
| Display location: | Not on display |
| Creator: | Ludolph, W. |
| Date made: | circa 1920 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 98 mm; Diameter: 173 mm |