Abstract: Method and apparatus using shutter blade and photocell lens arrangement for automatically controlling exposure of a photographic film by evaluating selected spectral scene light frequencies during certain ambient light portions of an exposure interval and evaluating additional spectral frequencies during a flash portion of the interval.

Abstract: An electromagnetic relay is disclosed having a ground connection in the form of a bent lead wire soldered on to an end of the asembly on an exterior side of the yoke. A base member of the relay, which comprises insulating material, has on its exterior side grooves in which the bent lead wire is guided from the housing to a pattern point on the connection side. It is thereby possible to manufacture the relay in the normal case without a ground connection and, where required, to subsequently apply the ground connection.

Abstract: The disclosed camera is focused manually with a helicoidally movable lens barrel and fine focused automatically by movement of the lens mount along the lens' optical axis. The lens mount is automatically started at a predetermined position, such as a mid position, in its movable range, and the automatic operation is disabled when the mount reaches either limit of its movable range.

Abstract: An electrical power sharing device comprising a single power inlet feeding two power outlets alternately for periods of time as determined by the ambient temperature, the device including a bimetallic strip contacting the profile of a continuously rotating cam and opening and closing the electrical connections between the power inlet and the power outlets during each revolution of the cam for periods determined by the profile of the cam at the point contacted by the bimetallic strip as determined by the ambient temperature.

Abstract: An equal input output learning device that can be added to or built into any musical instrument facilitating the teaching and improvisation of music and muscial theory using the musical instrument itself which device consists of a plurality of 12 switches representing the equal tempered 12 tone Chromatic scale, and which switches can be easily activated and changed by the player, as desired, using switches separately or in any combination, and, which switches when activated show all notes of the pitch classes chosen by indicators on the musical instrument together with indicators on the switches themselves.

Abstract: A system is disclosed for automatically controlling the shutter in a camera in accordance with ambient scene light level. While the shutter is opening, incident light is weighted at only one-half the value at which it is weighted after the shutter has been fully opened. A switchable voltage divider is utilized to accomplish the weighting function in accordance with shutter blade position.

Abstract: In the slit exposure shutter disclosed, front and rear shutter blades carry permanent magnets along a passage of electromagnets which are excited to repel the permanent magnets and cause the blades to float in the gaps of the electromagnets.

Abstract: A focussing system of the type which emits radiation from the camera towards the subject, with the radiation reflected from the subject being incident upon a receiving transducer generating an electrical signal from which focus-control information is derived. The emitted radiant-power level is automatically controlled in dependence upon camera-to-subject distance, preferably in dependence upon the power level of the reflected-back radiation incident upon the receiving transducer, even when the focus-control information required for primary system operation is independent of such power level.

Abstract: Disclosed is a single lens reflex camera having an electrically driven focal plane shutter. A locking arrangement locks the shutter curtains in their start positions before shutter release to prevent unintentional actuation of an exposure due to faulty operation of switches, shock, or the like. Upon completion of the upward movement of the quick return mirror, the locking mechanism is disabled.

Abstract: In a typical power system, a motor bus is fed by a main power system; and, an auxiliary system is provided to alternatively feed the motor bus. When a fast transfer from the main power to the auxiliary power system is desired, for example, in case of fault occurring in the main system, the inventive method transfers power in a synchronous mode; that is, power is transferred from the auxiliary system to the motor bus when the phase difference of the auxiliary system with respect to the frequency of the residual voltage on the motor bus is essentially zero degrees.

Abstract: Apparatus for preventing a malfunction of an electric shutter device is disclosed which comprises a source voltage detection circuit and a demagnetizing device connected with the output terminal of the detection circuit. The source voltage detection circuit produces a signal at its output terminal when the detected voltage is below a certain determined value. The device connected with the output terminal of the detection circuit is responsive to the signal to demagnetize the magnet of the shutter device.

Abstract: An exposure display device for a camera including a metering device for effecting metering while dividing a phototaking picture plane into a plurality of areas and for emitting a plurality of photoelectric conversion signals corresponding to those areas and processing circuitry for operating and emitting a proper exposure signal from the output signals of the metering device comprises comparing circuitry for comparing the plurality of photoelectric conversion signals with the proper exposure signal and emitting the result of the comparison, and a display device for displaying the comparison results emitted by the comparing circuitry while causing the comparison result to correspond to the divided areas.

Abstract: A photographic camera includes exposure control apparatus for determining automatically if the camera is adjusted to achieve a suitable exposure. This determination is made taking into account the exposure latitude of film in the camera. The control apparatus includes film data-retrieval apparatus for receiving both film speed and film exposure latitude data. A light-level sensing circuit determines scene brightness, and diaphragm and shutter control mechanisms provide data relating to the aperture size and shutter speed, respectively, at which the camera is set. A microprocessor computes an exposure value that is based on scene brightness and film speed. The microprocessor then uses the computed exposure value to compute a range of acceptable exposure values corresponding to the film exposure latitude. The microprocessor also computes an exposure value that is anticipated based on the aperture size and shutter speed at which the camera is set.

Abstract: A diaphragm control apparatus for camera comprises a correcting circuit for correcting error in aperture stopping-down caused by a time lag from the generation of a signal for blocking the aperture stopping-down motion to the actuation of a blocking device in response to the signal.

Abstract: This invention is concerned with an electronic control system that uses a common two wire lead with a plurality of detector units connected in parallel thereto in order to control a plurality of electrical loads. The common two wire lead is connected to a single master controller. Control modules or control elements have RF signals matched individually to each detector are mounted on the controller and move the loads coupled to each detector. This system finds great acceptance in regulating solenoid motors such as found in model railroad train layouts.

Abstract: In the camera and film winding apparatus disclosed, a motor is adapted to wind the film and a driving arrangement supplies the motor with a first signal to drive the motor so that the film is wound at a normal speed between frames, but at a lower speed than at the normal speed from the film loading position to the photographic start position.

Abstract: A processor of sheets of photosensitive material includes an entrance opening through which sheets enter the processor, developer, fix and wash tanks; a dryer; an exit opening through which the sheets exit the processor; and a transport system for transporting the sheets through the processor. Signals from a film sensor positioned proximate the entrance opening indicate when a leading edge and a trailing edge of each sheet enters the processor. An encoder provides signal pulses for each incremental movement of a drive shaft which drives the transport system. The signal pulses, which provide an indication of the linear travel of the sheets through the processor, are counted. Based upon the signals from the film sensor and the counted pulses, a signal is provided when the trailing edge of the last sheet passes out of the developer tank, so that the speed of the transport can be changed without affecting the developing of the images on the last sheet.

Abstract: A focus position indicating device for a camera including an array of electrically activatable display elements such as light emitting diodes or liquid crystal elements, the number of which are activated being dependent upon the state of focusing. A drive contrast signal is converted into a digital signal and compared with the count output of a continuously-cycling digital counter. The output of the counter is also decoded into a set of signals one of which is activated for each possible state of the counter output. The decoder output signals are gated by the output of a comparator circuit with the outputs of the gates connected to drive the display elements.

Abstract: In a photographic camera, an electrically powered memory device stores data obtained by sensing detectable means on a filmstrip, but loses stored data upon a power diminution below a minimum level necessary for memory retention. When electrical power is resumed above such minimum level to a predetermined higher level, a film drive is operated to rewind the filmstrip at least until the detectable means previously sensed during film advance have been returned past the sensing device. Then, the film drive is operated to re-advance the filmstrip substantially the same distance it was rewound. During re-advance, the sensing device again senses the detectable means to restore lost data to the memory device.

Abstract: A processor of photosensitive material includes an automatic control system for providing anti-oxidation replenishment. The control system includes a real time clock for providing an indication of the time of day, and means for storing a schedule of operating hours of the processor. The control system controls anti-oxidation replenishment as a function of the time of day and the schedule of operation. In one embodiment, the control system provides anti-oxidation replenishment on a twenty-four hour basis (even during non-operating hours) by operating the developer circulation pump and the anti-oxidation replenishment pump on a periodic basis during non-operating hours. In another embodiment, which is particularly useful when there are restrictions against leaving on electric power to the processor during non-operating hours, the control system adds a bulk amount of anti-oxidation replenishment at the time of turn-off of the processor.