US 4,072,409 A · Release device of motion picture camera

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. When the selector is manually switched to the single frame position, a disengage actuator is brought into cooperation with both of the shutter blade and the stop lever in such a manner that just after an exposure aperture is covered by the shutter blade to terminate a single frame exposure, the disengage actuator causes a pivotal movement of the stop lever in the other plane which in turn causes the stop lever to be taken out of the operative engagement with the release member as the stop lever is pivoted in the first-named plane regardless of the fact that release member is pressed. This results in operative engagement of the stop lever with the shutter blade to stop the shutter blade in the exposure aperture closed position.

Claims17

Dependent claims

A motion picture camera comprising:

(a) an exposure aperture,
(b) rotatable shutter means arranged for selectively uncovering and covering said exposure aperture by the rotational movement,
(c) stop means arranged normally for latching said shutter means at a position in which the shutter means fully covers the exposure aperture, said stop means being movable in either of at least a first and a second predetermined plane of substantially different orientation and releasing the latching of the shutter means of the movement in said first plane,
(d) release means manually operable from the outside of said camera and arranged upon acutation for displacing said stop means in said first plane from its latching position to its unlatching position against said shutter means, said release means being operatively engageable with the stop means, so long as the stop means is retained in said first plane, and
(e) disengaging means responsive to the rotational operation of said shutter means for displacing said stop means in at least said second plane to break off the operative engagement with said release means and thereafter for causing said stop means to return to its latching position against said shutter means once during each revolution of the shutter means,
thereby only one single frame shot being made possible despite the fact that said release means remains held in the actuated position.

3 more elements

A motion picture camera comprising;

(a) an exposure aperture,
(b) rotatable shutter means arranged for selectively uncovering and covering said exposure aperture by the rotational operation,
(c) stop means arranged normally for latching said shutter means at a position in which the shutter means fully covers said exposure aperture, said stop means being movable in either of at least a first and a second predetermined plane of substantially different orientation and releasing the latching of the shutter means by the movement in said first plane,
(d) release means arranged upon actuation for displacing said stop means in said first plane from its latching position to its unlatching position against said shutter means, said release means being operatively engageable with the stop means, so long as said stop means is retained in said first plane,
(e) electro-magnet means controlling actuation of said release means,
(f) switch means electrically connected to said electro-magnet means for controlling energization and deenergization of said electro-magnet means,
(g) control means manually operable from the outside of said camera for switching control of said switch means, and
(h) disengaging means responsive to the rotational operation of said shutter means for displacing said stop means in at least said second plane to break off the operative engagement with said release means and thereafter for causing said stop means to return to its latching position against said shutter means once during revolution of the shutter means,
whereby only one single frame shot being made possible despite the fact that said release means remains held in the actuated position.

6 more elements

A motion picture camera comprising;

(a) an exposure aperture,
(b) rotatable shutter means arranged for selectively uncovering and covering said exposure departure by the rotational operation and for stopping at a position where said exposure aperture is fully covered,
(c) release means arranged upon actuation thereof to be displaced in a predetermined direction to effect a camera release,
(d) stop means for arresting said shutter means at said position, and stop means being arranged at least upon camera release to be operatively engaged with said release means and displaced in a predetermined direction from an arresting position against said shutter means, thereby said shutter means being rendered rotative to uncover said exposure aperture, and
(e) disengaging means responsive to the rotational operation of said shutter means so as to be brought into actuating engagement with at least one of said release means and said stop means for displacing at least one of said release means and said stop relative to the other in a direction substantially different from the corresponding aforesaid predetermined direction to break off the operative engagement between said release means and said stop means and thereafter for causing said stop means to arrest said shutter means at said position once during each revolution of the shutter means,
thereby only one single frame shot being made possible despite the fact that said release means remains held in the actuated position.

3 more elements

Dependencies are inferred from the claim text.

Release device of motion picture camera

Life of this patent

Release device of motion picture camera

Life of this patent

Abstract

Claims17