Exposure-making shutters Diaphragms

GPHYSICS G03Photography G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ACCESSORIES THEREFOR

G03B9/00Exposure-making shutters Diaphragms

G03B9/02Diaphragms G03B9/04Single movable plate with two or more apertures of graded size G03B9/06Two or more co-operating pivoted blades G03B9/07with means for presetting the diaphragm G03B9/08Shutters G03B9/10Blade or disc rotating or pivoting about axis normal to its plane G03B9/12Two relatively-adjustable aperture-defining members moving as a unit G03B9/14Two separate members moving in opposite directions G03B9/16Two separate members moving in the same direction G03B9/18More than two members G03B9/20each moving in a single direction first to open and then to reclose G03B9/22each moving in one direction to open and then in opposite direction to close G03B9/24Adjusting size of aperture formed by members when fully open so as to constitute a virtual diaphragm that is adjustable G03B9/26incorporating cover blade or blades G03B9/28Roller blind or flexible plate G03B9/30Single blind with multiple slots or other aperture G03B9/32Double blind G03B9/34with adjustable slot with mechanism controlling relative movement of blinds to form slot G03B9/36Sliding rigid plate G03B9/38Single rigid plate with multiple slots or other apertures G03B9/40Double plate G03B9/42with adjustable slot with mechanism controlling relative movement of plates to form slot G03B9/44Curved track and plate G03B9/46Flap shutters pivoting about axis in plane of flap G03B9/48Double flap G03B9/50Louvre type G03B9/52Barrel shutters G03B9/54Conical shutters Rotating plate with axis of rotation inclined to optical axis of shutter G03B9/58Means for varying duration of "open" period of shutter G03B9/60by varying speed of movement of obturating members G03B9/62by varying interval of time between end of opening movement and beginning of closing movement G03B9/64Mechanism for delaying opening of shutter G03B9/66Means for cocking shutter separete from means for releasing shutter G03B9/68Cocking effected by movement of film G03B9/70with flash-synchronising contacts