Abstract: An electromagnetic shutter apparatus for a camera includes a first and a second notched disc which are adapted to rotate in response to a film winding operation, a resilient member operatively connecting the notched discs, and a detent member capable of engaging with and disengaging from the second disc in response to a shutter operation. The detent member prevents an inadvertent operation from occurring during a film winding and a shutter release operation. The apparatus also comprises an unlocking member which unlocks a film winding mechanism in ganged relationship with a shutter drive member which is electromagnetically driven to open the shutter, and a constraining member which can be moved into engagement with the unlocking member in response to an external operation to thereby prevent the unlock operation, thus permitting a desired multiple exposure process.

Abstract: In an angioscope for observing the condition of a blood vessel, a microscope comprises an optical system for forming a blood vessel or vascular image illuminated by a reflecting illumination device on a camera tube; a monitor device for magnifying and projecting the vascular image formed on the camera tube onto the screen of a television receiver by known magnification; a size measuring means for projecting on the screen of the monitor a size measuring index with magnification proportional to the magnification of the vascular image by utilizing the steps of superimposing the index upon the vascular image projected on the screen of the television monitor, relatively displacing the index from the vascular image, and measuring a size of a blood vessel from a size of the index and the magnification; and/or a flow rate arithmetic monitor device for calculating a flow rate of the blood flowing through the blood vessel by detecting the time required for movement of a red blood cell in the blood vessel projected on t

Abstract: An integrating time detector derives an integrating time interval within a reduced period of time, by decreasing a reference voltage against which an integrated voltage is compared in accordance with a time function stored in a computer.

Abstract: A switch for a camera employs a switching element which is formed of pressure sensitive conductive rubber or conductive rubber, to which an external pressure may be applied to cause it to bridge across a pair of conductive contacts, thus turning the switch on and off. The switch is disposed on the surface of a camera so as to be accessible to an external pressure.

Abstract: An electrophotographic apparatus comprising a corona charger, a photosensitive and electrostatic-charge retentive drum including an electrically conductive substrate and a photosensitive layer having a narrower width than that of a record paper, and a screening member inserted between the corona charger and a peripheral part of the photosensitive and electrostatic-charge-retentive member for gradually decreasing a quantity of electrostatic charge charged at side edge portions of the photosensitive layer in a direction toward the side edges of the photosensitive layer, whereby black line and stripe can be prevented from appearing along the side edges of the record paper.

Abstract: A release electromagnet comprises a permanent magnet assembly including a pair of yokes disposed in parallel relationship with each other, and a permanent magnet held between the yokes for attracting an armature, a winding disposed on one of the yokes which when energized produces a magnetic flux to reduce the attraction effect upon the armature, and a member of non-magnetic material disposed between and connecting the yokes together to reduce the energy required to release the armature.

Abstract: The disclosed data recorder utilizes a common tape recorder to which a computer unit is docked. In the computer unit, a display indicates if the reproducing or recording mode of the tape recorder is correct so that an operator may change the recorder operating mode.

Abstract: An electrical shutter including a first electromagnet for initiating opening of the shutter and a second electromagnet for initiating closing of the shutter. Each of the electromagnets has an operational time lag associated therewith, and the time lag of the first electromagnet is greater than the time lag of the second electromagnet. The control circuit of the present invention includes delay means, in the form of a variable resistor, for delaying the energization of the second electromagnet to compensate for the difference in the time lags of the first and second electromagnets.

Abstract: A focus detection system is provided in which an image of an object is projected onto an array comprising a plurality of light acceptor elements, formed by photoelectric elements, to cause them to produce photoelectric signals in accordance with the distribution of light intensity of the image. The photoelectric signals are converted into digital equivalents, and an absolute magnitude of a difference between digital signals of adjacent elements is calculated. These absolute magnitudes are arranged in the sequence of their magnitude, and a given number of them is accumulated, starting from the largest one. The accumulated value is utilized as the value of an evaluation function which indicates the sharpness of the image.

Abstract: Charged neutralizer apparatus including a charge neutralizing brush which is formed thin conductive wires brought into proximity with a charged body to cause a discharge thereof is disclosed herein. A spacer member is provided to prevent direct contact between the thin conductive wires and the charged body and defines a narrow clearance therebetween. The brush is disposed in a movable manner and adapted to move under its own weight or by biasing means, in following relationship with the changed body to thus enable an elimination of charge at any position of the charged body.

Abstract: A single lens reflex camera is provided which has a planar area for mounting a light emitting component such as an electronic flash thereon. The planar area is defined by at least a portion of top surface of a body of the camera which is located on one side of a pentaprism housing disposed centrally on the top surface, and is at a lower level than the remainder of the top surface which is located on the opposite side of the pentaprism housing. The planar area is formed with a threaded bore for mounting the light emitting component, and is also provided with a terminal connector having a plurality of terminals inclusive of a synchro contact terminal, an illumination control signal terminal and a power supply terminal.

Abstract: A focus correcting device for use in a rangefinder camera is operable to correct for a displacement of the focal point of an imaging optics which results from a change in the diaphragm aperture of an apertured diaphragm. An interlocking mechanism operationally couples a rangefinder with a focus adjusting mechanism of the imaging optics. Means is disposed in the interlocking mechanism or the focus adjusting mechanism to correct for a displacement of the focal point as the particular diaphragm aperture is established.

Abstract: An optical information reading-out apparatus which makes use of a focusing and tracking mechanism including first and second leaf springs for connecting an objective lens supporting body to first and second supporting members, respectively, and adapted to be moved in tracking and focusing directions when subjected to a magnetic force or to the action of piezoelectric elements.

Abstract: A diaphragm control circuit for a camera responds to a shutter release operation by causing a reverse rotation of a stepping motor to return a diaphragm mechanism to its initial position. Subsequently, the circuitr causes a forward rotation of the motor in accordance with the amount of light received by the camera in order to cause the diaphragm mechanism to establish a proper diaphragm aperture before an opening operation of a shutter is allowed.

Abstract: An apparatus for endoscopic photography includes a camera and a light source unit which may be coupled to an endoscope to permit a picture to be taken of the interior of a coeliac cavity. An operating signal is converted into a high frequency signal by means of a conversion circuit which is disposed in one of the camera and the light source unit while a recovery circuit for recovering the operating signal from the high frequency signal is disposed in the other of the camera and the light source unit. In this manner, a communication of the operating signal between the camera and the light source unit is enabled through d.c. feed lines disposed within the endoscope which are utilized to feed a film winding d.c. motor.

Abstract: Apparatus for automatically synchronizing a camera with an electronic flash is provided in accordance with the teachings of the present invention. The inventive apparatus determines if a photographing mode employing an electronic flash has been established by detecting whether or not a power source of the electronic flash is enabled. Upon a detection of a photographing mode employing an electronic flash, an exposure period synchronized with the operation of the electronic flash is automatically established. However, when no electronic flash is to be utilized, an exposure period appropriate to an automatic photographing mode is established.

Abstract: A camera with operation indicator for auto-strobo unit which includes a light emitting element which indicates the completion of a flashlight illumination by the strobo unit. The operation indicator includes a separate light emitting element located within the finder of the camera to provide a luminous indication within the finder whether a flashlight illumination from the strobo unit has been properly given.