Abstract: A screen printing machine comprises a conveyor for conveying a substrate to a positioning station, an XY.theta. table on which the substrate is to be put, and a printing device for printing a pattern onto the substrate in a printing station. The XY.theta. table is movable in an XY.theta. plane in the positioning station and also movable along a Z-direction perpendicular to the XY.theta. plane. The machine further comprises a device for moving the printing device between the printing station and a waiting station, an image processing device and a driving device for the XY.theta. table. The image processing device recognizes a position of the substrate and calculates the respective amount of movement of the XY.theta. table in the XY.theta. plane necessary for making the predetermined relative positional relation between the printing device and the substrate. The driving device moves the XY.theta. table, based on the amounts of movement calculated by the image processing device.

Abstract: A control device for periodic flash photographies is provided with an actuation timing setting circuit in which actuation timings of a camera are manually set and a timer control circuit which generates a first signal at every set actuation timing and a second signal a given period of time before every set actuation timing. The first signal is applied to a camera release electromagnet of the camera for a camera release operation. The second signal is applied to a voltage booster circuit of an electronic flash device or an external power source for an electronic flash device, so that a control transistor of the voltage booster circuit is made conductive by the second signal to supply current to the base of an oscillation transistor of the voltage booster circuit for the oscillation thereof, whereby the voltage booster circuit generates a high voltage applied to a main capacitor of the electronic flash device for the charging thereof.

Abstract: An interval timer periodically provides a release signal output to a camera for controlling photographic operation by carrying out one exposure cycle and a successive automatic film winding operation. The interval timer provides circuitry for setting the interval between the occurrence of the successive release signals and includes first and second terminals adapted to be connected with the camera, the release signal being transmitted to the camera through the first terminal. Circuitry within the interval timer is responsive to a first reply signal transmitted from the camera at the second terminal for examining the time of the arrival of the first reply signal at the second termial to determine whether or not the time falls into a predetermined condition for controlling the operation of the interval timer circuitry for periodically producing the release signal.

Abstract: A lamp control circuit for energizing a data imprinting lamp in response to an actuation of a flash trigger switch in a camera, for a given period so that data images illuminated by the lamp are imprinted on a film with a suitable exposure. The control circuit includes a series connection of a SCR element and a capacitor, a trigger circuit for applying a single pulse to the control terminal of the SCR element, a capacitor discharge circuit for discharging with a given time constant the capacitor that has been charged through the SCR element, and a switching circuit for energizing the lamp while the terminal voltage of the capacitor is above a threshold level. The trigger circuit has a high input impedance to protect the control circuit from high voltage which otherwise may be applied thereto through a camera synchro terminal to which the input terminal of the trigger circuit is connectable.

Abstract: An electrical drive which includes a motor for actuation of a film wind-up and shutter mechanism subsequent to exposure of a film frame and a mechanism for decoupling drive from the motor at the end of each wind-up and shutter charge action and also during this action if something occurs a fault preventing correct action of the film wind-up and shutter charge mechanism, whereby damage to the mechanism, the motor and film is prevented. The drive is correctly positioned with respect to a camera by a mechanism which also serves to provide electrical connection between a shutter control circuit and a drive control circuit, whereby the number of elements required to be precisely positioned with respect to the camera is less and manufacturing and assembly cost is reduced.

Abstract: Dating information is applied to camera film from date information displaying circuitry which receives decoded electronic time signals generated by a chronometer. A first power source energizes the chronometer and a second power source energizes the decoder and display circuitry and other components such as the exposure control circuit. A monitor is provided to enable the camera operator to observe the date information. Manually operable switches are provided to independently actuate the dating apparatus and the exposure control circuit as well as to independently operate the display circuitry and the monitor.In a modified embodiment, logic and switching circuitry are provided to monitor and date either exposure data obtained from a light measuring circuit and analog/digital converter or the date information generated by the chronometer. A manually independently operable switch for actuating the display circuitry is ganged with the switching circuit to expose the date information on the film.

Abstract: A fan having forward-curved blades, such as a sirrocco fan or cross-flow fan, wherein the width of the outlet of an air passage between the adjacent two blades is 0.28 to 0.52 of the pitch of the blades at the inlet of the air passage, and the width of the inlet of the air passage is 0.85 to 1.2 of the width of the outlet thereof. The fan having blades of this construction has improved efficiency and reduced aerodynamic noise level in operation.

Abstract: A camera is provided with a multi-exposure control system for obtaining proper exposure by either preselecting the diaphragm or the shutter speed and then respectively automatically controlling the shutter speed or the diaphragm aperture in accordance with the intensity of scene light passing through the diaphragm aperture. Structure is provided for obtaining a proper exposure by causing the diaphragm to be either fully opened or at its smallest aperture where with a preselected shutter speed an intermediate diaphragm aperture is not satisfactory. The exposure indicating device obtains an output voltage from an output circuit for computing exposure control voltages in response to step members representing steps of the diaphragm for stopping-down the diaphragm from its fully opened condition to a preselected value so that the output represents the shutter speed to be controlled with the preselected diaphragm aperture.

Abstract: An automatic exposure control circuit for a single lens reflex camera of the TTL light measuring type in which light entering through an eyepiece, in addition to light entering through an objective lens, is compensated for accurate exposures of the film. The automatic exposure control circuit of the invention is characterized in that, even if the characteristics of the circuit components for the two measured values of light are not exactly identical with each other, predetermined correct shutter control characteristics can be obtained through the provision of voltage control means for trigger levels, by which arrangement, marked improvement is achieved from the view point of mass production.

Abstract: The multi-exposure control device is provided with an automatic mechanism for stopping-down the diaphragm from an open position prior to exposure. A diaphragm adjusting ring stops the stopping-down operation at the pre-selected diaphragm aperture. An automatic exposure time control signal is generated from the light passing through the objective lens and stopped-down diaphragm aperture. A shutter speed selecting member provides a first mode for manual selection of the shutter speed and a second mode for automatic shutter exposure control.The device is switchable between a manual exposure control mode wherein both the shutter speed and diaphragm aperture are manually selected prior to exposure and an automatic exposure control mode having an automatic shutter speed control or automatic diaphragm aperture control.