Abstract: In a single lens reflux camera an electromagnetic release initiates operation of an automatic diaphragm control, a mirror driver, and a shutter driver, in that order. The electromagnetic release device includes a mechanical output terminal for controling each mechanism and an electric input terminal. The electromagnetic release device is provided in a flat space above the bottom exterior wall of the camera.

Abstract: The present invention relates to a control system consisting of a semi-conductor integrated circuit for a camera, particularly a control system from providing secure operation as well as a reduction of complexity. The system provides for separation of actuating signals from the low level signals for the integrated circuit so as to prevent added noise of the actuating signals from mixing with the low level signal.

Abstract: A method and an apparatus is disclosed for detecting the sharpness of the object image suited for optical instruments such as a camera and for adjusting the focus of the optics by means of photoelectric means presenting a non-linear resistance-illumination characteristics such as CdS or CdSe. Such an object image may be formed by means of the optics on the above mentioned photoelectric means presenting the electrodes at both ends along the longer side of a photoelectric semiconductor whose longer side is extremely long as compared with the shorter side as well as on the above mentioned photoelectric means presenting the electrodes at both ends along the shorter side of the photoelectric semiconductor. An object distance measuring system which digitally displays the distance between camera and photographing object when an automatic focusing operation is carried out is also disclosed.

Abstract: A camera system is composed of a flash and a camera in which the diaphragm and shutter time control as well as the indicating mechanism are automatically switched into a flash mode in response to the charge accumulation completion signal from the electronic flash discharge device.

Abstract: A camera having an indication system to determine suitable diaphragm aperture value by measuring the light penetrating through a photographing lens and to indicate the same digitally, wherein when said diaphragm aperture value exceeds the limit value of exposure control of a camera, a warning indication is given by the indication means to indicate the fact that the diaphragm aperture value is outside of control limit, and the number of input/output lead wires to the indication means is reduced. Thus simplifying the set-up.

Abstract: The present invention relates to a method and a device for detecting visibility of the image of an object for adjusting the focus of an optical system. The invention is especially suitable to an optical instrument such as camera, using photo-electric conversion elements having non-linear resistance -- intensity of illumination characteristics such as cadmium sulfide CdS or cadmium selenide CdSe, etc. The invention is characterized in that the photo-electric effect of the above mentioned photo-electric conversion elements will have mutually reverse characteristics depending on the properties inherent to the photo-electric conversion elements, to the arrangement of the electrode and the electric circuit, and further on the state of the image of an object formed on said photo-electric conversion elements. An electric circuit to enhance object image visibility is disclosed which makes use of these characteristics.

Abstract: In a shutter-time-preference single lens reflex camera, in which the shutter time control is done with a predetermined shutter time, and diaphragm value is determined by an output information of a photometric means which measures a transmission light of a photographing lens and the above predetermined shutter time information, a camera actuating means provided in the camera body is put into operation through a magnet means provided in the camera body so that the aperture of the photographing is controlled in accordance with the above predetermined diaphragm value, and then the shutter time control is performed. Further, the camera includes an electric driving device and the driving of the electric driving device is controlled by a safety switch which, in turn, is controlled for its ON and OFF conditions by the completion of the exposure operations such as the operation of the shutter rear screen.

Abstract: A temperature compensating device for devices comprising semiconductors. The temperature compensating device comprises a temperature compensating circuit, such as a circuit including a diode, and a current control circuit which adjusts the quantity of the electric current flowing through the temperature compensating circuit. The temperature characteristic of the temperature compensating circuit is mutually compensatory with that of the output of the device comprising semiconductors. When the temperature characteristic of the output of said temperature compensating circuit differs from that of the output of such semiconductor device, the current control circuit causes a current which corresponds to the difference between the temperature coefficient of the compensating circuit and that of the semiconductor device to flow through the temperature compensating circuit, so that satisfactory temperature compensation can be accomplished.

Abstract: A roll film camera of the type in which the film may be contained either in a magazine of normal film frame capacity removably mounted within the camera body or in a magazine of large film frame capacity detachably mounted on the rear of the camera body and in which the film transport and shutter tensioning mechanisms are operatively connected with each other by means of a single operating member. The film transport mechanism is provided with clutch means arranged between said single operating member and the driving means for the camera side takeup spool upon attachment of the large capacity film magazine to the camera body for disconnecting the takeup spool driving means from the single operating member.

Abstract: A camera which permits mounting of an electric film rewinding device and which is provided with a compartment for inserting a film containing magazine. In the wall of the compartment, there is an opening which is provided with means for mounting and dismounting a manual film rewinding device in addition to electric rewinding device mounting means arranged at the same opening, so that the electric or manual film rewinding device can be interchangeably mounted on and detached from the camera.

Abstract: An operating apparatus provided with a rotary actuator which is driven by a motor to operate two actuating means for the shutter and film-winding mechanisms of an associated camera in timed relation. The motor is associated with a control circuit including a delay circuit responsive to the voltage of a power supply source connected to the motor, by which the initiation of the braking of the motor is controlled with respect to the termination of duration of the film winding operation so that when the motor is stopped from rotating, the rotary actuator assumes with high accuracy a predetermined operating position ready to operate the actuating means for the shutter mechanism regardless of variation of the voltage of the power supply source.

Abstract: The present invention relates to a photo-electric conversion element suitable for use in a system for detecting object image visibility and a method for detecting object image visibility employing the same and also relates to a device therefor. The photo-electric conversion element is characterized by having a first electrode at both ends of the direction along with a short side of a photo-semiconductor which has an extremely shorter short side as compared to its long side, and having a second electrode discretely formed at both ends of the direction along with its long side. Further an element with electrical characteristics being non-linear is connected to or formed at each of the above mentioned electrodes.

Abstract: A camera being so composed as having an electric driving device which has a means to detect completion signals for each of such actions as film wind up, shutter release, film rewinding preparation and film rewinding, wherein an electric motor is controlled by said signals to perform each action of film wind up, shutter release and film rewinding automatically and in time sequence.

Abstract: An image sharpness detecting system employing two photoconductive cells of different geometry which permits detection of an optimum degree of sharpness of an image formed thereon regardless of variation in the direction of light distribution of the image relative to the electrodes of the cells. Differences between light response characteristics of these two cells due to the different geometry thereof are compensated for by providing optical means such as filter arranged between the cells, whereby the system is made accurately and reliably responsive to variation of light distribution even at low total light levels.

Abstract: This invention relates to a system for automatic focus adjustment of an optical system particularly adapted for use in a photographic camera which utilizes non-linear resistance versus illumination response characteristics which are prominent in photoconductive cells such as cadmium sulfide and cadmium selenide cells. In one embodiment, a pair of photoconductive cells, one of which has a photoconductive surface having elongated side portions which contact the electrodes along the length of the elongated side portions and another cell which has an elongated photoconductive surface and shortened end portions and which contact the electrodes only at the shortened end portions, are arranged so that portions of an image-forming light beam entering through an objective of the camera are directed to the photoconductive surfaces on which similar real images of an object are formed.

Abstract: A system for detecting the distinction of the object image characterized in that respectively on a photoelectric transducing element presenting electrodes on both extremities along the longer sides of a photoelectric semiconductor presenting considerably short sides as compared with the long sides and on a photoelectric transducing element presenting electrodes on both extremities along the shorter sides of a photoelectric semiconductor presenting considerably short sides as compared with the long sides an object image is formed by means of an optics and that the distinction of the above mentioned object image is detected by detecting the electric characteristics variable corresponding to the distinction of the above mentioned object image, of each of the above mentioned photoelectric transducing elements.

Abstract: An automatic shutter control system for a camera includes a continuous rotatable motor coupled to a pair of separately engageable electromagnetic clutches. The clutches are respectively operable, when engaged, for releasing the shutter to commence exposure and for winding up the shutter after exposure has terminated. When camera operation is initiated, the first clutch is engaged to release the shutter and to trigger the start of a manually selectable exposure duration. At the conclusion of the selected duration, the first clutch is disengaged and the second clutch is engaged to begin the wind-up of the shutter. An inertial sensor on the motor terminates the wind-up operation and disengages the second clutch when the increased torque on the motor from wind-up reaches a predetermined value.