Steward Angle of Sight instrument Mk1
Combined clinometer and sighting compass
Product details: Steward Angle of Sight instrument Mk1 | JH Steward | Magnetic compasses | Military | Material: Brass
This is a device that combines the functions of a prismatic aiming compass with that of a clinometer / abney level. When stood upright the clinometer can be disengaged allowing vertical angles to be measured on the white scale. When the sights are also released a vertical angle can be sighted as with the service pattern clinometer. The clinometer scale can be locked for convenient reading. If the large visor is raised the compass card is also unlocked. To read the compass, the clinometer card must be rotated out of the way by holding the device upside down. This will show the green compass card which can be read using the prism.
The instrument shows the broad arrow (crows feet) indicating that it was a military instrument. There is a name in ink on the case saying 'A.W. Warrington' but I have not been able to find more information that gives a positive identification. There was a scientist of that name but that would not explain the broad arrow (government property) on the item. The name could also have been added by a later owner making it impossible to trace today.
More information / other collections:
angle of sight
Data sheet
- Year
- 1916
- Serialnumber
- 299
- Type of use
- Military
- Material
- Brass
- graduation
- deg
- measuring range
- -90..90 (clino)
360 (heading) - accuracy
- 0.5 (heading)
1 (clino) - fine reading
- direct (analog)
- Size instrument (l x w x h) in m
- 0.08 x 0.10 x 0.03
- weight instrument in kg
- 0.3
- Size case (l x w x h) in m
- 0.09 x 0.11 x 0.05
- weight case & in kg
- 0.1
- country obtained from
- United Kingdom
You might also like
8 other products in the same category:
Combined clinometer and sighting compass
Product details: Steward Angle of Sight instrument Mk1 | JH Steward | Magnetic compasses | Military | Material: Brass