Patent ID: 8678682
Filing Date: 2014-03-25
Classification: G03B

Abstract:
1. A device for controlling a central shutter, in which a plurality of shutter leaves ( 3 ) are mounted on a circularly annular leaf carrier ( 1 ) such that they can be pivoted on a pivoting arm ( 4 ), and in which, as actuating device for the pivoting movement of the shutter leaves ( 3 ), an annular cam plate ( 5 ) is mounted on the leaf carrier ( 1 ) concentrically with respect to the shutter opening ( 2 ), such that it can be rotated continuously in one direction, it being possible for the rotation of the cam plate ( 5 ) to be blocked by mechanical engagement into a cam trough ( 8 ) in front of an actuating flank ( 6 ) of a cam, characterized in that, for mechanical blocking purposes, there is a push rod ( 9 , 10 ) of a solenoid, which push rod ( 9 , 10 ) can be moved perpendicularly with respect to the plane of the cam plate ( 5 ).