Lens shutters

Claim 2

A photographic lens shutter including first blade means operable to move into the open and closed position and to fully expose the lens aperture in the open position, second blade means manually presettable as a diaphragm and operable to close the lens aperture, electronic timing means being provided to cause said second blade system into the closed position after a time interval beginning with the opening of said first blade system, said first blade means being movable by a driving mechanism having a cooperating stop blocking said driving mechanism when the blades of said first blade means have reached the open position, said second blade means having a driving mechanism cooperating with an electromechanical locking device operable by said electronic timing means to release said driving mechanism for said second blade means, a release member on said driving mechanism of said second blade means, said release member in the end phase of the movement of said driving mechanism of said second blade means being engageable with said stop to release said driving mechanism of said first blade means.

Claim 3

The photographic lens shutter of claim 1, wherein said stop cooperating with said first blade means is formed as a lever catch, and wherein said driving mechanism of said second blade means includes a ring movable into the cocked position against the bias of a spring, and wherein said electromechanical locking device has a spring-loaded stop lever provided with a catch edge and an armature on one eNd cooperating with an electromagnet connected in the circuit of said electronic timing device.

Claim 4

The photographic lens shutter of claim 2 wherein said driving mechanisms of said first and second blade means are operable to be transferred simultaneously into the cocked position.

Claim 5

The photographic lens shutter of claim 3 wherein said driving mechanism of the first blade means is operably connected with said driving mechanism of said second blade means during the cocking movement.

Claim 6

The photographic lens shutter of claim 4 wherein said second blade means is engaged by a manual actuating mechanism for presetting the required aperture.

Claim 7

The photographic lens shutter of claim 4 wherein for time exposures said second blade means has a catch lever associated therewith and being acted upon both by a range setter and the shutter release to give time exposures, said range setter being operable to actuate a cutout switch for said electronic timing means.

Claim 8

A photographic lens shutter including first blade means operable to move into the open and closed position and to fully expose the lens aperture in the open position, second blade means presettable as a diaphragm and operable to close the lens aperture before the return of said first blade means to the closed position, electronic timing means being provided to cause said second blade system into the closed position after a time interval beginning with the opening of said first blade system, said first blade means being movable by a driving mechanism having a cooperating lever catch blocking said driving mechanism when the blades of said first blade system have reached the open position, said second blade means having a driving mechanism cooperating with an electromechanical locking device operable by said electronic timing means for releasing said driving mechanism for said second blade means, a release member on said driving mechanism of said second blade means, said release member in the end phase of the movement of said driving mechanism of said second blade means being engageable with said lever catch to release said driving mechanism of said first blade means.

Claim 9

A photographic lens shutter including first blade means operable to move into the open and closed position and to fully expose the lens aperture in the open position, second blade means presettable as a diaphragm and operable to close the lens aperture before the return of said first blade means to the closed position, electronic timing means being provided to cause said second blade system into the closed position after a time interval beginning with the opening of said first blade system, said first blade means being movable by a driving mechanism having a cooperating lever catch blocking said driving mechanism when the blades of said first blade system have reached the open position, said second blade means having a driving mechanism cooperating with an electromechanical locking device operable by said electronic timing means for releasing said driving mechanism for said second blade means, a release member on said driving mechanism of said second blade means, said release member in the end phase of the movement of said driving mechanism of said second blade means being engageable with said lever catch to release said driving mechanism of said first blade means.

Claim 10

The photographic lens shutter of claim 7 wherein said driving mechanism of said second blade system includes a ring movable into the cocked position against the bias of a spring and wherein said electromechanical locking device has a spring-loaded stop lever provided with a catch edge engageable with said ring and an armature on one end of said stop lever cooperating with an electromagnet connected in the circuit of said electronic timing device.

Claim 11

The photographic lens shutter of claim 8 wherein the driving mechanism of said first blade means is connected to a driving disc and wherein said driving disc is engageable with said ring for moving said first and second blade means simultaneously into the cocked position.

Claim 12

The photographic shutter of claim 9 wherein for time exposures said second blade means has a catch lever associated therewith and being acted upon both by a range setter and the shutter release to give time exposures, said range setter being operable to actuate a cutout switch for said electronic timing means.