Sighting telescopes with displaceable eyeguards

Claim 1

In a telescope provided with internal illumination means transmitting light to an eyepiece, the improvement consisting of an eye guard displaceably mounted at said eyepiece, biassing means urging said eye guard to an end position from which it is movable by the application of pressure when an observer looks into the telescope, shutter means being arranged in the telescope between the internal illumination means and the eye guard, said shutter means comprising at least one rigid blade mounted for movement in a direction transverse to the direction of movement of the eye guard, magnet means connected for displacement with movement of the eye guard, said magnet means comprising respective elements fixed relative to said at least one blade and to the eye guard in positions such that relative movement occurs between said elements with displacement of the eye guard from said end position, and said relative movement displaces said at least one blade in said transverse direction, from a position in said light path occupied when the eye guard is in said end position and in which said at least one blade prevents the omission of light from the eyepiece, to a position outside said light path reached when said eye guard is moved away from said end position.