Abstract: A camera having an exposure control device or, more particularly, having a digital control circuit for controlling exposure. Sequence control over a photographing operation and control over a display operation are both accomplished by the same sequence control circuit, which is simplified and yet permits selection between self-timer photographing and ordinary photographing operations.

Abstract: A co-ordination control system for a camera and a motor drive unit with separate electrical power sources one of which has a higher voltage than the other. The system is provided with an interface circuit including two switching elements arranged to cooperate with a common release button and connected between the circuitries of the camera and the unit so that the higher voltage of the source in the unit is prevented from being applied to the circuitry of the camera. For remotely controlled photographic purposes, the system is further provided with a control circuit for actuating these two switching elements in time-displaced relation to each other.

Abstract: A motor drive apparatus constructed to be not only attachable to cameras having mechanical coupling parts of two different types which are ordinarily not interchangeable. A change-over switch inserted in the mode signal transmission line of the motor drive apparatus closes when the apparatus is attached to a camera of the former type and opens when it is attached to a camera of the latter type.

Abstract: A camera assembly including a motor drive unit is formed with a base casing having a very small thickness dimension which conforms to and is removably mounted on the bottom panel of the camera housing. A grip fixedly secured to the base casing and upwardly extending along the right front corner of the camera housing facilitates stable manual holding of the camera, and also houses an electric motor located internally within the grip. A speed reduction gear train located within the base casing connects the motor to a film winding mechanism in the camera housing, and a battery is located in an attachment casing removably mounted on the bottom of the base casing by a locking device which enhances the portability of the camera by facilitating removal of the attachment casing from the base casing.

Abstract: In the disclosed camera and power winder arrangement, a power winder winds the film and contains a rewinder. A detector responds to rewinding movement of the film past a predetermined position, and a control circuit responds to the detector's sensing that the film has stopped moving past the predetermined position by braking the film rewind source.

Abstract: A film advance error detection system for synchronizing the operation of shutter cocking and film winding mechanisms with a motor drive unit therefor. This system utilizes three transducers positioned adjacent the sprocket wheel, film perforations and rewinding spindle to pick up signals whose frequencies are related to their speeds. By processing the signals in combination with an output signal of a phase difference compensator, it is made possible to provide, in a selective manner, a display representative of the film advane error and reeling end in the winding and rewinding operations along with the automatic stoppage of rotation of the motor.

Abstract: In the system disclosed, a motor drives a winding arrangement and a rewinding arrangement for advancing and rewinding the film in a camera in response to a first switch device that forms an electrical signal indicating completion of an exposure in the camera and a second switch device that indicates that the film has been rewound; the first and second switch devices being electrically connected to each other. The exposure completion and advance completion signals in the winding mode, and rewind stop completion signals in the rewind mode are multiplexed along the same line between the camera and the unit.

Abstract: In the disclosed device, forward and reverse rotation of a motor is used to wind and rewind a camera. A first semi-conductor switching element becomes conductive during winding and a second semi-conductor switching element becomes conductive during rewinding, the switching elements being connected in series across a power source. A selector switch has its fixed terminals connected to opposite poles of the power source. The motor is connected between the armature of the selector switch and the point between the switching elements. Driving circuits operate the switches so that the motor is driven in one direction when the selector switch is in one position and the reverse direction when the selector switch is in the other position and arranged to brake the motor after rewinding has stopped.

Abstract: A motor drive unit for a camera having variable winding speed characteristics functions so as to operate in a manner suited to environmental conditions such as temperature. This is done by changing the gear ratio from the motor to one of two values near the point of maximum efficiency and the point of maximum power output of the characteristic curve of the motors. Timer-controlled change of film frequency variation for providing a combined effect with the gear ratio is also disclosed.

Abstract: A camera having an exposure control device or, more particularly, having a digital control circuit for controlling exposure. Sequence control over a photographing operation and control over a display operation are both accomplished by the same sequence control circuit, which is simplified and yet permits selection between self-timer photographing and ordinary photographing operations.

Abstract: The disclosed device winds film in a continuous rapid-sequence mode or a non-continuous single-frame mode. A disengagement arrangement responds to a winding completion signal after each frame is wound in the continuous mode and disengages the transmission during the subsequent shutter release, but allows the transmission to remain engaged in the non-continuous mode and at the end of a winding sequence in the continuous mode. According to one embodiment, the disengagement arrangement contains an electromagnet that also actuates the camera's shutter release in the continuous mode.

Abstract: A camera having an exposure control device or, more particularly, having a digital control circuit for controlling exposure. Sequence control over a photographing operation and control over a display operation are both accomplished by the same sequence control circuit, which is simplified and yet permits selection between self-timer photographing and ordinary photographing operations.

Abstract: In the disclosed camera, a manually operated film advance lever and a shutter button are arranged conveniently to be operated when the camera is held for a horizontal shot, i.e., an exposure during which the film frame is oriented horizontally. A coupling arrangement, in an adapter suitable for mounting on the camera, engages a camera film winder and shutter release and contains a second winding lever and a second shutter release button both oriented in a position suitable for taking a vertical shot.

Abstract: A motor wind up device which is automatically stopped after completion of photography of a roll of film in a camera. A control circuit of the motor controlling the wind up operation is changed over from a stop state to a wind up state by means of a signal produced when the shutter has run. When the motor is once stopped when over-torque is detected at the termination of the film to carry out the release operation, no shutter operation signal is produced because the shutter has not yet been completely wound up so that the motor will not run. When the film is terminated at the beginning of wind up operation, the device prevents the production of a false shutter operation completion signal even if the shutter does not run.

Abstract: In the combination of a camera and a motor drive unit, an exposure adjusting device is provided. This exposure adjusting device is manually controllable either by rotating a diaphragm adjusting ring that is in engagement with a presetting ring. This rotation is followed up by a scanning member which is coupled to a variable resistor that is connected in a control circuit for an exposure meter to attain correct adjustment of the diaphragm value and shutter time in conformity with the available light conditions. This exposure adjusting device also is automatically controllable through operative connection of the diaphragm scanning member with a control member which is provided in the unit. The control member movement is initiated and terminated by means of an electromagnetic actuator and arrest respectively with electrical power supply from a unit battery.

Abstract: A single lens reflex camera capable of the high speed continuous photographing. It achieves high speed continuous photography by means of an automatic winding up device, designed so that, in order to shorten the photographing time, the mirror and the diaphragm are kept in the state wherein the first photograph is taken during the continuous photography.

Abstract: An automatic winding up device for a camera, in which a device for detecting the winding up completion signal supplied from the camera body as well as a delay device starting to operate by the detection of the winding up completion signal by the detecting device are disclosed. These devices operate in such a manner that the current supply to the winding up motor is maintained during the operation of the delay device. This acts to overload the motor for a certain time determined by the delay device after the completion of the winding up operation and overloads the winding up mechanism of the camera body. The current supply to the motor is interrupted after lapse of a time determined by the delay device so as to stop the motor. The winding up member is driven in the reversed direction by the reaction of the overload exercised on the winding up mechanism so that the load exercised on the camera is released at the termination of the winding up operation.

Abstract: In a winding up device of a camera settable to an operative position at a phase of exposure completion and to an inoperative position at a phase of winding up completion, there is provided an electromagnetic clutch in transmitting means for transmitting driving force from a drive source of the winding up device. Electrical supply of power to the drive source or winding up motor and the electromagnetic clutch are controlled through a detecting means for detecting the phase of winding up completion to effect rapid changeover between the connection and separation of the driving force of the winding up motor to and from a winding member of the camera, thereby a continuous winding up operation is performed with ease. Power is cut off to the winding up motor switching device and to an electromagnetic clutch switching means to make the film winding up mechanism powerless before a device for stopping the wind up action begins to work.

Abstract: In a motor drive unit for a camera, a body is provided with a camera attaching surface, a portion of which holds a dust shielding cover which receives a winding member of the camera. A set screw is adapted to mount the body onto the camera. A control drives a wind-up motor after each exposure of the camera.

Abstract: The brake transistor connected across the winding of a film winding motor is provided with a capacitor connected to the base so that when the power supply for the motor is stopped, the charging of the capacitor is initiated and causes flow of a base current to the transistor.