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Alidade
alidade
A heavy grey painted brass alidade with wide cross piece which holds a spigot to fit into compass verge glass, and a locking lever. The fore sight is an open frame with thread, with a dark glass and mirror reflector for celestial observations. Back sight contains slit, peep-hole with prism and dark shades.
For use on small repeaters associatid with Plath and Patin transmitting magnetic compasses.
(see ACO2524 and 548)
O.A. Height 6.5" (16.5 cm)
In fitted wooden box 9.1" x 5.5" x 5.5" (32.2 x 14.0 x 14.0 cm) : containing two shadow pins.
A heavy grey painted brass alidade with wide cross piece which holds a spigot to fit into compass verge glass, and a locking lever. The fore sight is an open frame with thread, with a dark glass and mirror reflector for celestial observations. Back sight contains slit, peep-hole with prism and dark shades.
For use on small repeaters associatid with Plath and Patin transmitting magnetic compasses.
(see ACO2524 and 548)
O.A. Height 6.5" (16.5 cm)
In fitted wooden box 9.1" x 5.5" x 5.5" (32.2 x 14.0 x 14.0 cm) : containing two shadow pins.
For more information about using images from our Collection, please contact RMG Images.
Object Details
| ID: | ACO0825 |
|---|---|
| Type: | Alidade |
| Display location: | Not on display |
| Creator: | Plath, C. |
| Date made: | circa 1940 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 105 mm x 175 mm x 95 mm |
| Parts: | Alidade |