Abstract: The present invention refers to a system for digitally indicating the digital input information, and particularly for avoiding the flickering of the indication state of the indication means in case the input information varies. The system includes a control means for conveying the digital input information to the indication means periodically to update the content of the indication means at the end of a determined period. When input information varies excessively, it is detected and immediately conveyed to the indication means independently of the update at the end of the determined period. Accordingly, the system is quite efficient as an indication system for a continuously varying input information.

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: An electric motor drive device for a camera includes an operation switch interlocked with a starting operation member, a memory circuit arranged to memorize the operated movement of the operation member through the output of the operation switch, and an electric motor control circuit which is controlled by the output of the memory circuit. The motor is arranged to be brought into an inhibited state in response to a signal produced by the operation of the operation member and to be released from the inhibited state into a driven state when the memory circuit is inverted by another signal. The latter signal is produced during a returning movement of the operation member in its operation. The memory circuit is provided with a semiconductor switch for allowing power to be supplied to the memory circuit only when it is in operation so as to avoid unnecessary power consumption.

Abstract: In the arrangement disclosed, a photographic camera operates both with an electronic flash that generates a charge completion signal and a flash without a charge completion signal. In the camera, two switching elements shift between a time constant set for the flash with the charge completion signal and a second time for a flash without the charge completion signal. A control signal responds to the time constant circuit to control an exposure in response to the time constant circuit.

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: An exposure control device is disclosed which has an extremely high accuracy as compared with the prior art, the error range being within a one-eighth step. For such a highly accurate control of exposure time, a value of exposure time to be determined is converted to a binary code of n bits, of which the lowest one bit is weighed one-eighth step. Based on the decimal number corresponding to the upper m bits of the binary code, the frequency of the control signal is adjusted and is used in reading out the lower (n-m) bits of the same binary code, whereby the period of actuation of the shutter is determined.

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: 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 photographic device includes means for automatic control of the quantity of light from an electronic flash by comparing the brightness of a main object to be photographed with the brightness of a sub-object to be photographed, and the shutter of the camera opens during the time in response to the brightness of a sub-object to be photographed.

Abstract: The present invention relates to various kinds of the flash light photographic systems consisting of a combination of either of the below mentioned cameras with either of the below mentioned flash light device;a camera CD presenting an input terminal of the information for controlling the diaphragm and the output terminal of the information for the set aperture,a flash light device SD presenting the output terminal of the information for controlling the diaphragm and the input terminal of the information of the set aperture,a camera CT presenting an input terminal of the information for controlling the diaphragm,a camera CA presenting an output terminal of the information of the set aperture,a flash light device ST presenting an output terminal of the information for controlling the diaphragm,a flash light device AS presenting an input terminal of the information of the set aperture.

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 the exposure control system disclosed, a first photoelectric element responds to light from a scene to be photographed. A second photoelectric element is a spot sensor set to respond from a portion of the scene to be photographed. An exposure control circuit which is coupled to the first and second photoelectric elements controls the shutter and aperture on the basis of at least the relationship between the responses of the first and second photoelectric elements.

Abstract: The present invention relates to an integrated circuit body suited to be applied for a TTL single reflex camera, by arranging at least two of the three circuit parts, namely the indication circuit part presenting an indication function, the light sensing circuit part presenting a light sensing function and the control-operation circuit part.

Abstract: An automatic camera being simple in handling and composition and provided with an accessory selectively mounted on the camera body or with an aperture value setting information device mounted on the camera body, so that the camera operation may select either the shutter time priority mode or the aperture value priority mode.

Abstract: An apparatus for checking the voltage of a power source battery in a photographic camera is disclosed. In simple form, this apparatus comprises first and second series circuits connected in parallel with each other to the battery, the first one of which has a luminous diode and a resistor, and the second one of which has two luminous diodes and a resistor, the characteristics of the luminous diodes and resistors being so selected that, when the actual voltage is dropped from a predetermined level, a difference between the brightnesses of the luminous diodes of the first and second circuits results to apprise the camera operator of the drop in battery voltage.

Abstract: In the camera disclosed, depending upon whether the shutter preference or aperture preference mode is selected, a computer establishes a computed value on the basis of a preset value and other ambient conditions. A number of separate comparators compare the respective values to a single reference wave form and turn off respective gates when the analog voltages achieve predetermined relationships to the reference wave form. The gates passed pulses from a common source from the beginning of the reference wave form until the respective gates are shut off. The values are thus digitized and displayed within the camera.

Abstract: A flash unit is slidable between a retracted position in a camera body and a pop-up position outside the body. A switch enables a flash exposure control in response to movement of the flash unit out of the camera body and disables the exposure control when the flash unit is moved into the camera body. An override switches the switch to the disabling position when the flash unit is moved outside of the body and forms a discharge circuit for the flash main capacitor.

Abstract: A digital information transmitting and displaying system for a photographic camera in which a plurality of electric signals bearing respective digits, or symbols or combinations thereof constituting a photographic information, such as an exposure value, are transmitted in sequence through a common channel from a camera control circuit device to a digital read-out device arranged to be visible in the view finder of the camera.

Abstract: An exposure control apparatus operating with selection of the diaphragm preselection and shutter preselection automatic exposure control modes is provided with first and second signal shapers arranged to cooperate with a lens aperture mechanism through a common intermediate member. Upon setting of a desired diaphragm value in the lens aperture mechanism, the intermediate member is driven along with the first signal shaper in exactly corresponding relation.

Abstract: An automatic exposure control apparatus for controlling the diaphragm of the camera in accordance with the preselected shutter time and the exposure value, in which a digital-to-analog converter having a counter responsive to the number of pulses supplied from a clock pulse generator through a gate produces a time variable output capable of attaining a certain level dependent upon the preselected shutter time and a light value as photoelectrically sensed, that is, an exposure value and, which is detected by a first comparator. The output of the first comparator is applied to the gate, so that the converter is set to memorize the exposure value therein.