+
-
Type 6/18
Aperiodic compass attached to a wooden stand
Bowl: Brass, painted black. Filler plug at side, expansion chamber at base of bowl. Mounted on three legs fitted with pin and helical spring suspension. Inside of bowl painted white. Fixed arrow line mounted inside bowl below verge glass, this line is fitted with a cup to prevent card ( spider) coming off pivot. A rotatable verge ring, graduated to 1/2 points, carries six parallel wires (for grid steering).
Card: Spider of eight elements, marked at N, S, E & W.
Needle: Has two magnetic needles slung under the card.
Pivot: Unsighted, but presumed to be of bare needle type attached to base of bowl.
On ACO wooden stand 7" x 7" x 6.75" ( 17.8 x 17.8 x 6.75cm)
Bowl: Brass, painted black. Filler plug at side, expansion chamber at base of bowl. Mounted on three legs fitted with pin and helical spring suspension. Inside of bowl painted white. Fixed arrow line mounted inside bowl below verge glass, this line is fitted with a cup to prevent card ( spider) coming off pivot. A rotatable verge ring, graduated to 1/2 points, carries six parallel wires (for grid steering).
Card: Spider of eight elements, marked at N, S, E & W.
Needle: Has two magnetic needles slung under the card.
Pivot: Unsighted, but presumed to be of bare needle type attached to base of bowl.
On ACO wooden stand 7" x 7" x 6.75" ( 17.8 x 17.8 x 6.75cm)
For more information about using images from our Collection, please contact RMG Images.
Object Details
| ID: | ACO0318 |
|---|---|
| Type: | Aperiodic Compass - Aircraft |
| Display location: | Not on display |
| Creator: | Campbell, Colin |
| Date made: | 1918 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 170 mm x 175 mm x 190 mm |
Your Request
If an item is shown as “offsite”, please allow eight days for your order to be processed. For further information, please contact Archive staff:
Email: library@rmg.co.uk
Tel: +44 (0)20 8312 6516 (during Library opening hours)
Click “Continue” below to continue processing your order with the Library team.