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Projector compass
Liquid compass-miniature
Bowl- Transparent plastic, with plastic expansion chamber at base, brass filler plug at top.
Card- Dia:0.75" (1.8cm) Mica (?) with microscopic graduations to 1degree cut through it.
Needle- Two needles of square section mounted on underside of card.
Pivot: Stem attached to base of bowl, point engages in brass cap at centre of card.
Bowl- Transparent plastic, with plastic expansion chamber at base, brass filler plug at top.
Card- Dia:0.75" (1.8cm) Mica (?) with microscopic graduations to 1degree cut through it.
Needle- Two needles of square section mounted on underside of card.
Pivot: Stem attached to base of bowl, point engages in brass cap at centre of card.
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Object details
| ID: | ACO0785 |
|---|---|
| Type: | Projector compass |
| Display location: | Not on display |
| Creator: | Deutsche Seewarte |
| Date made: | 1945 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 12 mm; Diameter: 22 mm |
| Parts: | Projector compass |