Leica Camera Ag

Konstantin Aab

Stefan Uwe Best

Michael Peter Drucker

A device for controlling a central shutter, in which a plurality of shutter leaves () are mounted on a circularly annular leaf carrier () such that they can be pivoted on a pivoting arm (), and in which, as actuating device for the pivoting movement of the shutter leaves (), an annular cam plate () is mounted on the leaf carrier () concentrically with respect to the shutter opening (), such that it can be rotated continuously in one direction, it being possible for the rotation of the cam plate () to be blocked by mechanical engagement into a cam trough () in front of an actuating flank () of a cam, is distinguished by the fact that, for mechanical blocking purposes, there is a push rod () of a solenoid, which push rod () can be moved perpendicularly with respect to the plane of the cam plate ().

Device for controlling a central shutter

A device for synchronizing shutter blades, which are each fastened to a swivel arm which is mounted rotatably on a swivel pin on a circular-ring-shaped blade carrier, is distinguished in that a synchronizing ring disc () is arranged concentrically with respect to the blade carrier within a circle connecting the swivel pins () and is coupled in a form-fitting manner to each of the swivel arms ().

Device for synchronizing shutter blades

A central shutter for camera objectives, said central shutter having a ring-shaped leaf carrier () surrounding the shutter aperture (), on which leaf carrier at least two studs () are disposed arranged in a circularly symmetrical manner in relation to each other, on which studs sickle-shaped shutter leaves () are pivotably mounted, and having an electric motor drive pivoting the shutter leaves () over the shutter aperture (), is distinguished in that the drive includes a motorized rotatable winding ring () which is realized as a flat ring disk and rests on the leaf carrier (), a cam ring () realized as a flat ring disk is rotatably mounted in the winding ring (), sawtooth-shaped cams () being provided on a ring surface thereof, wherein the winding ring () and the cam ring () are coupled to each other by means of at least one tension spring () that can be tensioned in the direction of rotation of the winding ring () and the pivoting movement of the shutter leaves () can be controlled by coupling to the cam ring ().

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Edermünde-Grifte, Germany

Konstantin Aab