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Dry bowl compass
Bowl-Brass, weighted at base and suspended in brass gimbal ring. Glass has centre boss into which is screwed a magnet, length 6" (15.2cm) by 1/3" (0.6cm) with rounded tip at thread end.
Needle-Edge bar with centre ring for gimbal suspension. Rests on bell-shaped support which has soft iron tip. Wax blobs on one end.
Pivot-Steel spike in brass tube. Mounting attached to base of bowl.
Mounted in ACO stand 7.75" (19.6cm) square
Needle-Edge bar with centre ring for gimbal suspension. Rests on bell-shaped support which has soft iron tip. Wax blobs on one end.
Pivot-Steel spike in brass tube. Mounting attached to base of bowl.
Mounted in ACO stand 7.75" (19.6cm) square
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Object Details
| ID: | ACO0018 |
|---|---|
| Type: | Dry bowl compass |
| Display location: | Not on display |
| Creator: | Captain Edye |
| Date made: | circa 1844 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 270 mm x 195 mm x 195 mm |