Abstract: A compactly constructed shutter and support apparatus in a camera permits placement of the shutter in close proximity with a film strip to minimize weight and moment of inertia of the shutter for rapid repetitive starting and stopping of the shutter in response to control signals to a drive mechanism.

Abstract: A motion picture camera having a start sequence digital circuit, by which various component elements in the camera related to photographic operations are sequentially and automatically operated with a predetermined relationship, when the trigger operating member of the camera is actuated, and a stop sequence digital circuit, by which the abovementioned various elements are sequentially and automatically stopped with a predetermined relationship, when the trigger operating member is released.

Abstract: In a motion picture camera capable of using a sound film, a blocking device for selectively stopping operation of a shutter and a shifting device for moving a pinch roller to or out of resilient contact with a capstan are controlled by a common electromagnetic device operating in response to actuation of a trigger device.

Abstract: Thin walled components, which are moving or capable of movement, are stopped or clamped by the cooperation between an electromagnet core and an independent short-circuit component. The mobile component is always in contact with the core of the electromagnet and with the short-circuit component such that no noise is produced when the mobile component is stopped or clamped.

Abstract: A motion picture camera with a release device capable of selective control of rotative movement of the shutter blade in the camera for a normal motion picture sequence and for a single frame slot depending upon the position of a selector therefor. The release device is provided with the single stop lever arranged between the shutter blade and a release member to be pivoted in either of two planes, perpendicular to each other. For a motion picture sequence, as the pivotal movement of the stop lever is limited to only one of the planes, it is retained in operative engagement with the release member so long as the latter is pressed, thus permitting a number of revolutions of the shutter blade in sequence.

Abstract: For a motion picture projector, a mode controller is coupled through control members to a dual clutch assembly to selectively transmitted drive as required from a unidirectional input to supply and take-up devices. Particularly, the mode controller is a manually operable mode selector for adjusting a control rod carrying dual control cams to selectively actuate respective supply and take-up drive transmitting clutches to free, slip, and positive drive conditions, as well as to actuate other projector components. Responsive to conditioning of the clutches, and projector components such as shuttle retractor and other control mechanisms, the projector is changed from one mode of operation to another.

Abstract: A motion picture camera wherein a rotary shutter can be arrested in a first or a second angular position in which its blade respectively overlies and is out of register with the light-admitting aperture. In order to terminate a long exposure which is started with stoppage of the shutter in the second angular position, the user must close an auxiliary switch serving to energize an electromagnet which starts an electric motor for the shutter and simultaneously withdraws a tooth of a pivotable intercepting lever from the path of movement of two projections on the shutter. The first projection approaches and engages the tooth when the shutter is to be arrested in the first position, and the second projection approaches and engages the tooth in the second position of the shutter.

Abstract: In a movie camera a control frequency generator for producing a picture and sound synchronizing sinusoidal control frequency using a rotating member of the camera such as a running gear made from a soft magnetic material and having a magnetically discontinuous region formed therein, a permanent magnet having one pole thereof placed in the vicinity of the discontinuous region, and a magnetic flux sensing device placed between the region and the pole of the permanent magnet for sensing the flux changes within the magnetic circuit during rotation of the camera gear and thereby producing the synchronizing control frequency.