Abstract: A needle crystal in the form of a capsule comprising fullerene molecules such as C60 and a C60 platinum derivative and having a hollow portion (a fullerene shell capsule) is provided. The fullerene shell capsule which has been prepared by the liquid-liquid interface precipitation method, which comprises (1) a step in which a solution containing a first solvent dissolving fullerene therein is combined with a second solvent in which the solubility of fullerene is lower than in the above first solvent; (2) a step in which a liquid-liquid interface is formed between the above solution and the above second solvent; and (3) a step in which a carbon fine wire is precipitated on the above liquid-liquid interface, has a novel characteristic in its form and can be used as a catalyst supporting material, a raw material for a plastic composite material, a storage material for gas such as hydrogen, a catalyst for fuel cell, or the like.

Abstract: A needle crystal in the form of a capsule comprising fullerene molecules such as C60 and a C60 platinum derivative and having a hollow portion (a fullerene shell capsule) is provided. The fullerene shell capsule which has been prepared by the liquid-liquid interface precipitation method, which comprises (1) a step in which a solution containing a first solvent dissolving fullerene therein is combined with a second solvent in which the solubility of fullerene is lower than in the above first solvent; (2) a step in which a liquid-liquid interface is formed between the above solution and the above second solvent; and (3) a step in which a carbon fine wire is precipitated on the above liquid-liquid interface, has a novel characteristic in its form and can be used as a catalyst supporting material, a raw material for a plastic composite material, a storage material for gas such as hydrogen, a catalyst for fuel cell, or the like.

Abstract: A camera system includes a camera body and a lens in which a motor circuit and an electric circuit are arranged and are supplied with electric power from a power source in the camera body. Ground contact terminals for the motor circuit and the electric circuit are separately arranged in the lens, and the motor circuit and the electric circuit are electrically connected to the power source negative terminal through the separate ground contact terminals.

Abstract: An optical accessory comprises a bayonet type mount which can be freely mounted by rotation to a camera body having a camera mount of a bayonet type, a switch related to a power source and an operating member for actuating the switch. The optical accessory mount has a mounting claw arranged for pushing the operating member, the length of said mounting claw being so set that the mounting claw pushes the operating member for actuating the switch when the mounting by rotation of the optical accessory to the camera body is almost completed.

Abstract: Recording of information on and/or reproduction of information from a magnetooptical recording medium is effected as follows. A light beam from an objective lens is irradiated on a track of the recording medium. The objective lens is driven in a direction perpendicular to the track such that the beam spot and the track have a predetermined positional relationship therebetween. A magnetic field modulated according to information to be recorded is applied to the beam spot irradiated position of the recording medium by a magnetic field applying device. A relative position between the objective lens and the magnetic field applying device in the direction perpendicular to the track is detected. The recording of information is effected on the recording medium by applying the magnetic field according to the information while changing the beam spot irradiated position on the recording medium with respect to the track.

Abstract: An optical head for information recording and/or reproduction has a light source, a deflecting mirror, an adjusting mechanism and an objective lens. A light beam generated by the light source is deflected by the deflecting mirror to be directed to a recording and/or reproducing surface of a recording medium while adjusting the position of the deflecting mirror by the adjusting mechanism. The light beam deflected by the deflecting mirror is converged on the recording and/or reproducing surface of the recording medium by the objective lens.

Abstract: In a method or apparatus for reading information from each of a plurality of information tracks arranged in a longitudinal direction on an information recording medium by relatively moving the information recording medium the orthogonally to the longitudinal direction of the tracks relative to a sensor array for reading information from the information tracks, wherein relative skew between the direction of arrangement of sensors of the sensor array and the longitudinal direction of the track is detected, and information is read from the information tracks while the recording medium and the sensor array are relatively moved in the longitudinal direction of the information tracks and, if desired, while the sensor array and the recording medium are relatively moved in such a manner as to compensate for deviation of an information reading area of an information track from a proper position caused by the skew in the course of the relative movement, based on the result of the detection.

Abstract: A guide rail mounting structure using a motor comprises a motor, a chassis to which the motor is fixed, and a guide rail positioned in contact with the stator portion of the motor.

Abstract: A mount device for an interchangeable lens having a bayonet type mount member capable, upon rotation relative to a mount member on a camera body, of coupling with or decoupling from the latter, and a plurality of electrical connection terminals arranged, upon completion of a coupling operation of both mount members, to contact with the equal number of electrical connection terminals on the camera body so that communication become possible between the lens and the camera body. The axial rear ends of the terminals on the lens project outwardly from the rear end surface of the mount member on the lens and the rear end surface of the rearmost lens.

Abstract: A camera having a motor-driven diaphragm device comprises a diaphragm driving motor disposed within the camera; a diaphragm driving member which is driven by the motor to open or close the diaphragm aperture of a photo-taking lens; and a change-over switch to shift the rotating direction of the motor depending on the opening or closing of a switch which operates in association with a shutter release button. The diaphragm aperture is stopped down by the driving force of the motor when the release button is depressed and is opened to the fully open position thereof by reverse rotation of the motor when the release button is no longer depressed.

Abstract: An electro-magnetically driven shutter is arranged to make an exposure by driving shutter blades to travel with driving members with power supply effected to an electro-magnetic drive source and to cut off the power supply upon completion of the travel of the shutter blades. The shutter blades are kept in their travel completed positions by locking the driving members with spring members and then, in response to a film winding action, the driving members are unlocked by pushing back the driving members in a travel starting direction with the shutter blades being brought by inertia back to their travel start positions respectively.

Abstract: An electromagnetic drive device for a focal plane shutter having a tubular yoke and a cylindrical permanent magnet concentrically fixed to the yoke by clamping apparatus. A moving coil in a space between the permanent magnet cylinder and the yoke rotates about the axis of the permanent magnet and is drivingly connected through a shaft to blades of a leading or trailing curtain of the shutter, wherein a pair of holes are formed in one of the end surfaces of the permanent magnet cylinder symmetrical with respect to the axis thereof. The running characteristic of the shutter blades can be adjusted when the distribution of magnetic flux density is previously adjusted by turning the permanent magnet with the use of a tool engaged in the holes.

Abstract: The disclosed device controls the speed of a camera's motor driven film feed. Upon detection of the initiation of a blank frame feed operation, the high speed frame mode is selected to automatically feed the film a predetermined number of frames and then automatically return to a preset frame speed mode. Upon detection of the initiation of a film load operation, the slow speed frame mode is selected.

Abstract: A mechanically controlled shutter with a latch for holding the closing curtain in a charged position arranged upon running off of the opening curtain to start operation which then terminates at running off of the closing curtain to control the shutter time, wherein there is provided a keeper for holding the closing curtain latch in the charged position independently of the closing curtain latch, whereby after actuation of a camera release operation and before the opening curtain runs off, the keeper is actuated to release out of holding connection with the closing curtain.

Abstract: A light shading device for a camera in which a soft and elastic light shading curtain has a base part which is fixed on a flat support surface, in the region of the shutter running path. The free end of the shading curtain is brought into elastic contact with the shutter curtain by way of a step provided on the support, the step serving to incline the free end of the light shading curtain with respect to the support surface.

Abstract: The disclosed camera includes a viewfinder which displays a display member representing a preset aperture value in its view field, and is capable of operating in open aperture and stopped down aperture manual exposure modes as well as a shutter priority automatic exposure control mode. A retracting arrangement retracts the display member from the view field in response to a shift either to the stopped down or the shutter priority automatic exposure control mode.

Abstract: The disclosed camera ordinarily uses an electromagnetic release device. A supplemental mechanical release device is enabled only when the electromagnetic release device's battery is absent from the battery case. The release operation is then carried out by the mechanical release device.

Abstract: In the disclosed camera system, a spring arrangement to drive an automatic exposure mechanism of a camera and a magnet arrangement to control starting and stopping of the AE mechanism of the camera are provided within an electric drive device, and the automatic exposure control of the camera is carried out by mounting the electric drive device on the camera. Facilities, when energized by a power supply, are set to supply driving power to a motor for cocking the shutter, and an arrangement supplies power from the power source to the magnet arrangement for actuating the magnet arrangement. The present invention eliminates disadvantages of prior camera systems, namely, inferior response characteristic of the magnet and erroneous operations by the release action, and a large number of connecting terminals.

Abstract: A fixing member having a screw part to be attached to the cable release mounting screw hole of a release button of a camera and a cover member made of an elastic material are unified into one body and are arranged to be attachable to and detachable from the cable release mounting part of the release button.

Abstract: A device for releasing shutter hold particularly for a single lens reflex camera including a shutter hold release device having a release mechanism for releasing the shutter hold wherein the driving power for the release mechanism is charged into the release mechanism in operative engagement of the charge of mirror driving power in a mirror driving mechanism of the device.