摘要:
An electronic flash device having a slave emission function and a standby mode, includes a setting member for setting the slave emission function, activation means activated in response to an input generated upon the function setting operation of the setting member, and power supply control means for controlling a power supply of the electronic flash device to be turned on based on the activation of the activation means.
摘要:
A camera system including an electronic flash device with a slave emission function, includes an electronic flash device including: a light-receiving unit for receiving a steep optical signal; a light-emitting unit for slave-emitting illumination light toward an object in response to the optical signal received by the light-receiving unit; a timer for starting a time measurement operation in response to the optical signal input to the light-receiving unit, and permitting an operation of the light-emitting unit after an elapse of a predetermined period of time; an attachment member used for attaching/detaching the device to/from a camera body; and a data communication function unit for exchanging various data including photographing information with the camera body via the attachment member; and a camera body electrically connected to the electronic flash device. In the camera system, the data communication function unit delays a synchronous time set by the camera body side in correspondence with the measurement time of the timer.
摘要:
An electronic flash control system and method for a high-speed repeating flash having a main capacitor which stores energy for flashing, a discharge element, a switching apparatus, a control unit and a photometric unit. The switching apparatus causes the discharge element to flash multiple times during the exposure operation of the camera based on a signal from the control unit generated in accordance with the duty ratio. The duty ratio for each flash is determined by the control unit based on a signal from the photometric unit representative of the quantity of light from the previous flash of the discharge element. As the control system does not perform real-time control, delays of the control system do not adversely affect accuracy.
摘要:
An exhaust air hood has a tubular body and at least one plate member having a chamber inside thereof. The plate member has a planar configuration including widths gradually decreasing toward two longitudinal ends of the plate member, the chamber having an opening at each longitudinal end of the plate member. The exhaust air hood discussed is capable of reducing backflows through exhaust air ports caused by wind pressure, thus enabling a proper ventilation system to be achieved.
摘要:
An electronic flash apparatus is capable of discriminating the presence or absence of connection to a camera, and also the state of a connected camera. When the flash apparatus is connected to a camera capable of information transfer, the time required to transfer information is minimal. At least some of the terminals that connect the flash apparatus to the camera perform multiple functions. Different currents are supplied to certain terminals depending upon whether a connected camera is in an information transfer state or a flash photographing state. Terminal voltage detection controls certain functions, including varying certain terminal voltage.
摘要:
A paper feeder of a label printer makes printing successively on a continuous printing paper on which a multiplicity of label papers are affixed. The paper feeder includes a control device for moving back the continuous printing paper by a length obtained by adding a fixed length capable of continuously making the next printing subsequently to a final printing position of the printing paper upon resumption of the printing operation when the movement of the printing paper is stopped by completion of the printing operation to an adjustment length for settling a printing position and makes printing successively from a fixed position of the label paper upon resumption after the printing operation is stopped. In this case, the adjustment length is set to a sum of a length from the printing start position of the printing paper upon resumption of the printing operation to a label position detection sensor disposed ahead in the backward direction and a length required to cause the printing paper to reach a constant speed upon resumption of the printing operation.
摘要:
A multi-chamber inclined ball mill comprises a base, a frame-shaped support member rotatably supported on the base, and a grinding chamber rotatably supported on the frame-shaped support member. The grinding chamber is constituted of at least three cylindrical chambers each provided with outwardly tapered protrusions at its opposite ends and the cylindrical chambers integrally formed so that their longitudinal axes mutually intersect at the centers thereof and form a common grinding space at their region of intersection. The grinding chamber is supported on the frame-shaped support member such that the longitudinal axes of the cylindrical chambers intersect the axis of rotation of the frame-shaped support member at a single point and at one and the same angle.
摘要:
A light emission controlling device for an electronic flash apparatus includes a first photometric unit for metering a first region of an object field in a weighted manner and outputting first photometric informaiton with a lapse of time; a second photometric unit for metering a second region of the object field in a weighted manner and outputting second photometric information with a lapse of time; a comparing unit for comparing the first photometric information with the second photometric information; and a controlling unit for determining timing for outputting a light emission stop signal on the basis of the relationships between the first photometric information and the second photometric information.
摘要:
A resin composition for use in a powder paint. The composition is either a composition (I) compriisng (A) a polyester resin containing both carboxyl and hydroxyl groups, (B-1) a vinyl monomer containing both (beta-methyl)glycidyl and hydroxyl groups and (C) a blocked isocyanate in a weight ratio of 60-96:3-40:1-20, or a composition (II) comprising (A) a polyester resin containing both carboxyl and hydroxyl groups, (B-2) a (beta-methyl) glycidyl group-containing vinyl polymer, (B-3) a hydroxyl group-containing vinyl polymer, and (C) a blocked isocyanate in a weight ratio of 60-96:3-40:3-40:1-20.
摘要:
A PWM inverter including a saturable core and a main circuit comprising a series circuit of a main winding and a resistor in which switching means applies a DC voltage across the main circuit by time ratio control with the polarity inverted alternately, and the on-off control of the switching means is accomplished by using a saturable transformer with a saturable core.