Motor-driven apparatus for camera
AssigneeMinolta Camera Kabushiki Kaisha
InventorKayoshi Tsujimoto
Life of this patent
Estimating the term…
Abstract
A motor-driven apparatus for use in a camera equipped with a shutter device which is normally maintained in a close position after the termination of an exposure and adapted to be shifted to an open position in response to the shutter release operation, comprises a motor for driving the film; a switch opened during the transportation of the film and closed upon the termination of the transportation of the film; an electric circuit for producing signals only when the shutter device is shifted from the open position to a closed position; and a semi-conductor control circuit connected in series with the switch between the motor and the cells, the semi-conductor control circuit being rendered conductive by signals from the electric circuit and rendered non-conductive when the switch is opened.
Claims21
A motor-driven apparatus for a film exposing camera including a body, a manual-release member, an objective lens, a shutter device normally biased to be closed and opened for an exposure against its normal bias in response to movement of said release member to its operative position, said motor driven apparatus comprising:
- means for transfering said film, including a motor driven for transference of said film;
- means for producing a signal only when said shutter device has been transferred from its opened condition to its closed condition;
- first switch means operable between an open position and a closed position;
- semi-conductor switch means made conductive for driving said motor upon receipt of said signal when said first switch means is in its closed position and being made non-conductive when said first switch means is opened;
- and
- means responsive to said film transfering means for opening said first switch means at a moment during the transference of said film and closing said first switch means upon termination of the transference of said film.
A motor-driven apparatus for a film exposing camera including a body, a manual release member, an objective lens, a shutter device charged after termination of an exposure of said film to light traversing said objective lens and released to be opened in response to movement of said release member to its operative position, said motor-driven device comprising:
- means for transferring said film, including a motor-driven for transferrence of said film;
- means for producing a signal in response to the charging of said shutter device;
- first switch means transferrable between an open position and a closed position;
- semi-conductor switch means made conductive for driving said motor upon receipt of said signal when said first switch means is in its closed position and being made non-conductive when said first switch means is opened;
- and
- means responsive to said film transferring means for opening said first switch means at a moment during the transferrence of said film and closing said first switch means upon termination of the transferrence of said film.
A self-processing camera for use with self-processing film units having a frame size larger than conventional 35 mm film, which comprises:
- an objective lens having a long focal length;
- a manual release member;
- a shutter device normally biased to be closed and opened only for an exposure in response to movement of said release member to its operative position;
- means for transfering one of said film units which has been exposed towards the outside of said camera, said film transfering means having a motor-driven for the transference of the exposed film unit;
- means for producing a signal only at the movement when said shutter device has been moved from its open condition to closed condition;
- semi-conductor switch means made conductive for driving said motor upon receipt of said signal;
- means responsive to said film transfering means for making said semi-conductor switch means non-operative in relation with the transference of the exposed film unit;
- a first housing accomodating said film transfering means, said means for making said semi-conductor switch means non-operative and said film units;
- and
- a second housing accommodating said objective lens, said release member, said shutter device and said producing means, said second housing being spaced apart from said first housing so that light from a scene to be photographed which has passed through said objective lens can expose one of said film units within said second housing at a substantially uniform light distribution over the entire surface of the film unit.
A motor-driven apparatus for a film exposing camera including a manual release member, and a shutter device normally biased to be closed and opened only in response to the movement of said release member to its operative position, said motor-driven apparatus comprising:
- means for transfering said film, including a motor driven for transference of said film;
- means for producing a signal only at the moment when said shutter device has been moved from its open position to closed position;
- semi-conductor switch means made conductive for driving said motor upon receipt of said signal;
- and
- means for response to said film transfering means for making said semi-conductor switch means non-conductive to stop the driving of said motor at a moment during the transference of said film.
Dependencies are inferred from the claim text.