Abstract: A camera has an arrangement which includes a strobe as a built-in part or to which the strobe can be detachably secured, the strobe being arranged to move to up and down positions. The camera is provided with a strobe operating device for moving the strobe from the up position to the down position, a selecting switch for selecting single shooting and continuous shooting, and a controlling arrangement. The controlling arrangement actuates the strobe operating device to move the strobe to the down position after the completion of photography when the single shooting is selected by the selecting switch. When the continuous shooting is selected by the selecting means and while the camera is continuing a photographic operation, the controlling means maintains the strobe at the up position without actuating the strobe operating means even after the completion of photography.

Abstract: The present invention provides a camera system comprising: a zoom driving means driven by a battery as a power source, for varying a focal length of a taking lens; other driving means driven from the battery as a power source; a detecting means for detecting whether the other driving means are being executed or the other driving means are to be executed; and a control means for prohibiting the execution of the zoom driving means when the detecting means detects the fact that the other driving means are being executed or that the other driving means are to be executed.

Abstract: A shaped article of gypsum possessing heretofore unattainable high strength, a method for the production of the shaped article, and a method for the production of inclusion water indispensable to the hardening by hydration of the production of the shaped article of gypsum are disclosed.

Abstract: A shaped article of gypsum possessing heretofore unattainable high strength, a method for the production of the shaped article, and a method for the production of inclusion water indispensable to the hardening by hydration of the production of the shaped article of gypsum are disclosed.

Abstract: A shaped article of gypsum possessing heretofore unattainable high strength, a method for the production of the shaped article, and a method for the production of inclusion water indispensable to the hardening by hydration of the production of the shaped article of gypsum are disclosed.

Abstract: The present invention relates to a magnetic recording medium for a magnetic disk unit or the like and, more particularly, to a magnetic recording medium having its recording layer made of a magnetic alloy film with uniform magnetic characteristics. The present magnetic recording medium comprises a non-magnetic substrate, at least two sputtered layers of chromium thin film having a bow-like columnar structure which chromium thin film is laminated on the substrate, another sputtered layer of a magnetic alloy thin film laminated on the chromium thin film, and a protective layer laminated on the magnetic alloy thin film. The present invention is effective in reducing modulation of regenerative output relatively independent of a texture roughness of the substrate.

Abstract: In a flash photographing apparatus, a flash device is arranged to slow the rise of flashing characteristic thereof at the initial stage of flashing. To attain this purpose, the electric charge of a first capacitor is impressed via an inductance onto a flash tube at the initial stage of flashing. Following this, the electric charge of a second capacitor is directly impressed on the flash tube without passing through the inductance.

Abstract: A data communication system in which data communication between a camera and an accessory such as a strobe is performed by transmitting items of data in sequence in synchronism with clock pulses. If the data communication is not performed normally, the system detects an error in this communication, and the operation of performing data communication using these items of data is recommenced.

Abstract: A light measuring circuit including a light sensing device for sensing light and producing a signal representative of the light sensed, a compressing circuit for compressing the signal, a capacitor having one terminal connected to a predetermined voltage, a charging circuit responsive to the compressing circuit for charging the capacitor, a detecting circuit for responding to the voltage level of the capacitor, a switch for shorting the capacitor when closed for initiating charge of the capacitor by opening, and a delay circuit coupled to one of the charging circuits and the switch for delaying the onset of charge of the capacitor.

Abstract: In a system for setting the aperture in a camera for flash photography, a minimum aperture is computed in response to parameters such as distance to an object, stroboscopic guide number and film sensitivity. In one embodiment, a predetermined aperture value is preestablished in the system and the computed minimum aperture is compared therewith. Where the computed minimum aperture is below such predetermined aperture value, such computed minimum aperture is used in flash photography. On the other hand, when the computed minimum aperture is above such predetermined aperture value, an aperture larger than the predetermined minimum aperture value is used in flash photography. Other embodiments for flash aperture setting are also set forth.

Abstract: This invention provides a method for the manufacture of a high-expansion type absorbent polymer by first causing an absorbent polymer which is obtained by polymerization of a monomer and is possessed of an alkali salt of acrylic acid as a component of polymer to be cross-linked at the time of azeotropic dehydration thereof with a cross-linking agent possessing two or more functional groups in the presence of an inorganic salt and subsequently drying the cross-linked polymer. By the method of this invention, there can be obtained a high-expansion type absorbent material which absorbs water quickly and forms a gel not viscid but permeable to gas. This absorbent material is highly advantageously used as absorbent for sanitary materials free from leaking water and as a water-retaining agent for agricultural applications hardly causing rotton plant roots.

Abstract: A camera system capable of performing flash photography is arranged to perform pre-flashing to detect beforehand the quantity of flash light to be obtained by main flashing. The system makes a display to show whether the flash light quantity thus detected assures an adequate exposure.

Abstract: An electronic flash apparatus having a first trigger circuit for causing a main light source to start firing, a first capacitor for firing the main light source, a second trigger circuit for causing a preliminary light source to start firing, a second capacitor for firing the preliminary light source, and a circuit for producing a trigger signal for preliminary lighting when a preliminary illumination is carried out, wherein the second capacitor is connected in common to the main and preliminary light sources, and there is provided a preliminary lighting changeover circuit responsive to selection of a bounced-flash mode for changing the application of the trigger signal from the second trigger circuit to the first trigger circuit.

Abstract: The disclosed flash device is of the kind that incorporates an integrated processing circuit requiring a stable voltage, but one and the same battery supplies both a booster circuit and the processing circuit. The device avoids the drop in voltage to the processing circuit when the booster circuit draws current after a flash by means of a detector circuit that detects the flash or the operation of the booster circuit. A switching circuit responds to the output of the detector circuit and supplies the charge on a back-up capacitor to the integrated processing circuit. Thus, in the event of a flash, the processing circuit which is normally operated by power from the battery is protected from a supply voltage drop by the supply of a voltage from the back-up capacitor.

Abstract: A flash device for a photographic camera is arranged either to inhibit a flashing action or to shift the control mode of the camera from flash photography to daylight photography in cases where an object to be photographed is located outside of the adequately operatable range of distance. A pre-flashing action is performed to detect a distance to the object when a main capacitor is charged to a given level before the capacitor is amply charged for flash photography. Then flash photographing is performed at an aperture value determined on the basis of the detected distance when the distance is within the adequately operatable distance range. In the case where the detected distance is outside of the adequately operatable distance range, the main capacitor is further charged for an increased flashing power.

Abstract: In a flash device arranged to determine the aperture value of a photo-taking lens according to the measured level of a reflection light obtained by preliminary flashing and to control main flashing according to a light control level corresponding to the aperture value, when a light diffusing panel is arranged in front of a main flashing part for a wider flash illuminating angle, another light diffusing panel which gives an equal light reducing effect is also arranged for a preliminary flashing part. The light quantity of preliminary flashing is thus reduced in proportion to the degree of reduction in the light quantity of main flashing, so that the aperture value set by preliminary flashing and the light controllable range of main flashing for photographing can be made to be always in agreement with each other.

Abstract: A document issuing apparatus wherein images of different forms and images of data to be printed on the forms are stored in memory. Form images and data images are combined, edited, and printed to produce a series of sets of transaction control slips in an order dependent upon classification information contained in the data to be printed.

Abstract: A high speed copying machine transports a sheet from a sheet stack to a stop gate at very high speed, and then transports the sheet from the stop gate to a transfer point on the drum at a speed matching the peripheral speed of the drum. The time required to rotate a point on the drum from the exposure position to the transfer point is actually greater than the time required to transport a sheet from the sheet stack to the stop gate, which is very near the transfer point.

Abstract: An image data storing device according to the invention includes a data compression/expansion device between the main memory of a CPU and an auxiliary memory device, such that image data are transmitted between the main memory and the data compression/expansion device, while data which are obtained by compressing the image data are transmitted between the data compression/expansion device and the auxiliary memory device.

Abstract: In the disclosed electronic flash, camera operation at various depths of field is made possible by producing a diaphragm-setting signal in response to a preliminary flash directed at a preliminary object, converting this signal to a digital value, and adjusting the main flash in response to light reflected from a main object and in response to the digitally memorized diaphragm setting signal.