Abstract: A motor driven camera in which a reversible motor is used to wind and rewind the film, and to perform some reciprocative camera function. The camera is constructed so that film will be wound in the forward direction of the motor. The reciprocative camera function is performed by reversing the direction of the motor. An additional shifting step is necessary to rewind the film, the film being rewound when the motor is in the reverse mode and the shifting step is completed. Examples of reciprocative camera functions include lens focus, and retracting a flash or lens cover.

Abstract: A focal length switching type camera wherein the focal length switching operation is initiated by a focal length switching and operating device, and a motor for driving a moving device is energized according to information from the focal length switching and operating device. The moving device moves a lens unit for holding a lens in a direction of an optical axis.

Abstract: An exposure control device for a camera capable of changing f numbers having a device for detecting an f number of a taking lens which constitutes factor A, a photometering device for detecting brightness of a subject as factor B, a device for detecting film speed as factor C, a memory containing a plurality of exposure values adapted to be addressed by a value of at least one factor selected from the group consisting of A, B, and C wherein the exposure values are predetermined by varying the value of the one factor and assuming the non-selected factor is constant, and a control device for determining a difference between a detected value and the assumed constant value of the non-selected factor, correcting the address of the exposure value based on the difference, and reading the corrected exposure value.

Abstract: A focal length switching type camera wherein a lens unit having a photographic lens is selectively moved to one of at least two predetermined normal positions to thereby be able to switch at least two focal lengths, and a judgement device judges whether or not the lens unit is in the predetermined normal position. An actuator device is actuated if the judgement device judges that the lens unit is not in the normal position. The actuator device is alarm means or a light emitting member for giving an alarm that the lens unit is not in the normal position.

Abstract: Automatic focus adjusting device comprising a range finding means which generates a signal corresponding to a distance to an object to be photographed; means for setting a photographing lens to a position corresponding to the output signal from the range finding means; a primary judging means which judges whether or not a diaphragm setting is within the range in which fixed focus photographing is possible or not; and a secondary judging means which judges whether an output signal from the range finding means is at a level capable of operating an automatic focusing means, wherein the secondary judging means judges only when the primary judging means judges that a diaphragm setting is not within the range in which fixed focus photography is possible and the automatic focusing means is operated only when the secondary judging means judges the output signal is at a level capable of operating the automatic focusing means.

Abstract: A range finder for measuring the distance of an object to be measured by the steps of radiating the spot light to the object, forming an image of the reflected ray of light by image forming means and measuring the distance of the object from the output of an element which is disposed at a position substantially corresponding to the image forming position and of which output varies in accordance with the light-receiving position on the light-receiving surface. PSD are used as the element. A focussing detector which includes a semiconductor position detection element PSD placed at a position corresponding to the film surface in a camera or the like and detects the focussing state on the basis of the electric output from the semiconductor position detection element PSD.

Abstract: A device for the pressure fixing of a toner image contains a pair of pressure fixing rolls arranged in parallel to each other. An image record carrier is fed in between said pressure fixing rolls which, for the pressure fixing of the toner image, are pressed against each other through a pressure bar by means of a plurality of pressure generators. Said pressure generators are positioned displaceably in the axial direction of said pressure fixing rolls to adjust a load distribution depending upon the width of said record carrier.

Abstract: An optical printing device includes a photosensitive means having a photosensitive surface and an optical print head. The optical print head has a plurality of arrays of a plurality of light emitting devices selectively energized and an optical means to form light images from the light emitting devices on the photosensitive surface.A plurality of the light emitting device arrays are arranged in a plurality of rows, with the light emitting devices aligned in a common direction with the arrays.The optical means comprises a plurality of graded index optical fiber arrays of which the optical axes are directed perpendicularly to the aforesaid photosensitive surface.

Abstract: A photoconductive member for electrophotography wherein an electric field is established across a light amplification layer comprising a first transparent electrode, a field-effect light-emitting layer, a second photoconductive layer and a second electrode after the first photoconductive layer has been uniformly charged when a light image impinges on the first photoconductive layer, the portion of the field-effect light-emitting layer corresponding to the light image emits light to the first photoconductive layer, whereby an electrostatic image is formed on the first photoconductive layer by both the light image impinged thereon and the light emitted from the field-effect light-emitting layer.

Abstract: After uniformly charging one insulator side of an insulator mesh the other side of which is subjected to electroconductive treatment, the ion flow controlled by recording signals is irradiated for a short period of time on the insulator mesh to obtain a charge distribution wherein the charge on the insulator side is neutralized corresponding to the dots to be recorded. Via mesh apertures which have been freed from the charge by neutralization, the ion flow is irradiated for a time far longer than the above-said short time on an insulating recording substrate, to obtain thereon an electrostatic latent image having an amplified charge distribution.

Abstract: Informations recorded in a master medium are first magnetically transferred to a temporary copy medium. The transferred informations are repeatedly reproduced with at least one reproducing magnetic head. The feature of the invention resides in the magnetic transfer means wherein the magnetic transfer field is generated from mechanically rotating or oscillating permanent magnet means.