Sighting device for a ballistic projectile apparatus
AssigneeEidgenossische Waffenfabrik
InventorWeber Hans
Life of this patent
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Abstract
The ring-shaped sighting device comprises an annular ring-shaped space the axial height of which decreasing from a window provided in the annular space for observing the level of the liquid to the opposite side. Hence, the uneven bottom forms a displacer for the liquid present in the annular space, so that the volume of this liquid versus its surface can be maintained of a low value on the entire periphery of the annular space. In this way, thermal dilatation of the liquid has no significant importance on the level of the liquid which guarantees an indication largely independent of the temperature.
Claims12
A sighting device for indicating the degree of inclination of a launcher, having a tubular barrel, comprising:
- an annular vessel system surrounding said barrel, said vessel system defining a coherent annular space having a bottom, configured for containing a liquid forming at least approximately on the entire periphery of said annular space a free surface said vessel system further including a displacer disposed within said space for diminishing the volume of said liquid to establish a large free liquid surface relative to the volume of said fluid.
A sighting device for indicating the degree of inclination of the barrel of a ballistic object launcher, comprising
- an exterior tubular ring having a first substantially transparent observation window and a central axis;
- an interior tubular ring configured for operative engagement within said exterior ring;
- a continuous chamber defined by said interior and exterior rings having a first end defined by a first annular barrier lying in a radial plane substantially perpendicular to said axis, and a second end defined by a second annular barrier having a first segment lying in a radial plane, and a second segment lying in a plane oriented at a first angle from said axis, said chamber including;
- a first semi-cylindrical section of a first axial dimension and a second semi-cylindrical section of a second axial dimension shorter than said first axial dimension, wherein
- said window is adjacent said first section.
Dependencies are inferred from the claim text.