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Liquid compass - aircraft compass
Liquid compass
Bowl: Grey painted brass, filler plug at side, expansion chamber at base. Inside of bowl painted white. Has a black wire lubber line under verge glass. Fitted with a rotating verge ring which is graduated to 360 degs carrying two parallel wires in the N-S line, for grid steering. A glass cover is fitted to verge ring, also a verge ring lock. Mounted in grey painted brass casing. Dia. 5"(12.7cm) without any means of damping vibrations.
Card: Wire spider of eight elements, N-S red, N point marked by a red diamond, other elements black. The ends are turned down at right angles. Attached to pivot at centre.
Needle: Two needle magnets mounted below spider.
Pivot: Inverted type, with pivot stem attached to bridge at base of bowl.
Bowl: Grey painted brass, filler plug at side, expansion chamber at base. Inside of bowl painted white. Has a black wire lubber line under verge glass. Fitted with a rotating verge ring which is graduated to 360 degs carrying two parallel wires in the N-S line, for grid steering. A glass cover is fitted to verge ring, also a verge ring lock. Mounted in grey painted brass casing. Dia. 5"(12.7cm) without any means of damping vibrations.
Card: Wire spider of eight elements, N-S red, N point marked by a red diamond, other elements black. The ends are turned down at right angles. Attached to pivot at centre.
Needle: Two needle magnets mounted below spider.
Pivot: Inverted type, with pivot stem attached to bridge at base of bowl.
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Object Details
| ID: | ACO0405 |
|---|---|
| Type: | Liquid compass - aircraft compass |
| Display location: | Not on display |
| Creator: | Henry Hughes & Son Limited |
| Date made: | circa 1940 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 80 mm; Diameter: 145 mm |