Abstract: A lens shutter camera includes a distance adjusting mechanism which is operated by the rotation of a single ring in one direction as it is driven by a drive source such as a motor. A distance adjustment is performed by a movement of a movable taking lens barrel in the direction of an optical axis thereof. Rotation of the ring in the other direction operates a lens shutter mechanism to open the shutter blades. A shutter closing spring is charged by a shutter controlling electromagnet, and is enabled to close the shutter blades.

Abstract: A wick for burning a liquid fuel, having a liquid fuel supplying section adapted to supply the liquid fuel and a combustion section connected to the upper end of the liquid fuel supplying section and adapted to evaporate the liquid fuel supplied through the liquid fuel supplying section thereby to burn the liquid fuel. The improvement comprises that a thin sheet body from heat resistance fibers is attached at least to a part of the combustion section and that the combustion section is separably coupled to the liquid fuel supplying section. The thin sheet body attached to the combustion section reduces the generation of tar on the latter, while the separable coupling between the liquid fuel supplying section and the combustion section permits an easy renewal of the combustion section solely when the tar deposition on the latter has become heavy.

Abstract: An automatic focusing apparatus for a camera comprises a first focusing optical system with a half mirror transmitting light from a subject, a second focusing optical system with a mirror to lead another light from the subject to the half mirror and a single focusing element for receiving said different lights thereby focusing detection.

Abstract: A lens shutter mechanism for camera includes a shutter opening/closing lever which opens or closes a shutter blade or blades. The lever is pivotally mounted on a movable shaft which is fixedly mounted on a shutter close lever. At the same time as an electromagnet, which is used to maintain the shutter open, is deenergized, the shutter close lever is operated to cause the shutter opening/closing lever to close the shutter blade or blades.

Abstract: A triaxial focal plane shutter includes a second blind winding drum which is rotatably supported by a pair of support members disposed above and below it. A first blind winding shaft extends through the second blind winding drum and the pair of support members, and fixedly carries a pair of first blind winding pulleys on its upper and lower ends, thereby allowing an independent rotation of the second blind winding drum and the first blind winding pulleys.

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 motor driven camera includes a reversible motor which is disposed within the body of a camera. The camera includes a transmission mechanism which transmits a drive from the motor to a film winding mechanism, a film rewind mechanism, a shutter charging assembly, an automatic focussing assembly or a zone focus assembly in a selective manner. The motor is disposed in a space in the camera body located below the film wind and rewind shafts. The drive shaft of the motor extends perpendicular to the optical axis of the camera lines.

Abstract: A water tight seal structure for a camera or other device comprises a step formed in the upper end of an opening provided in the frame of the device to pass a rotating shank body which forms a movable operating member of the device. Water repellent rubber is fixedly secured to the step. The inner peripheral surface or the upper surface of the water repellent rubber is maintained in tight engagement with the adjacent surface of the shank body to prevent an ingress of water into the device.

Abstract: A single-lens reflex camera comprises a gear rotated when a shutter button is depressed, a movable mirror rotated upward to the prescribed position, a stop-driving mechanism, and a control mechanism which transmits the rotation moment of the gear to the movable mirror and stop-driving mechanism to lift the movable mirror so that after the movable mirror is lifted, it actuates the stop-driving mechanism in the stop-down mode.

Abstract: A data recordable camera is provided with a timer circuit for providing a time data and a timing data, a data recording unit for converting the time data from the timer circuit into an optical image to expose a film, and data display unit for displaying the time data. The timing data is transferred to a motor drive device to determine the operation timing of the motor drive device.

Abstract: A bladed shutter is assembled into an interchangeable lens of a camera with a focal plane shutter, and comprises a plurality of shutter blades for opening and closing a taking light path, a pair of shutter opening and shutter closing rings for respectively opening and closing the shutter blades, a shutter opening governor for controlling the operation of the shutter opening ring, a shutter closing governor for controlling the operation of the shutter closing ring, a diaphragm mechanism for limiting the extent of rotation of the shutter opening ring to adjust the degree of opening of the shutter blades, a shutter cam for adjusting the degree of engagement between the shutter closing governor and the shutter closing ring, and a shutter charging mechanism interlocked with a drive lever provided on the part of the camera for energizing the shutter opening ring and the shutter closing ring.

Abstract: An X-contact device for a programmed shutter or a shutter of the type in which shutter blades also serve to determine a diaphragm aperture comprises means for detecting an end of a maximum opening period of the shutter, and an X-contact switch adapted to be closed by the detecting means. The switch, when closed, initiates an illumination of a strobo unit and the end of the maximum shutter opening period in order to provide a supplementary exposure added to a natural light exposure which has been maintained until that time.

Abstract: A focal plane shutter comprises a first and a second blind, a take-up and a winding drum supporting the opposite ends of the first blind, a take-up and a winding drum supporting the opposite ends of the second blind, a first blind winding pinion and a second blind winding pinion having an operationally integral relationship with the first and the second blind winding drum, respectively, and a pair of shutter winding sector-shaped gears in meshing engagement with the first and the second blind winding pinion, respectively, and adapted to rotate in response to a shutter charging command. Each of the sector-shaped gears have a hiatus which is located opposite to the associated pinion to release the meshing engagement when no shutter winding operation takes place. The sector-shaped gears and the pinions are located relative to each other in a manner such that rotation of the first blind winding pinion precedes rotation of the second blind winding pinion when a shutter winding operation is to be commenced.

Abstract: A bladed shutter comprises a plurality of shutter blades, also serving as a diaphragm, which are supported by a shutter opening ring and a shutter closing ring, both disposed in a concentric manner. The shutter opening ring is rotated in response to the actuation of a shutter release to drive the shutter blades in their opening direction. The rotation of the shutter opening ring is delayed by a governor. A shutter control circuit contained within a camera and including a photoelectric transducer element controls the rotation of the shutter closing ring, and enables its rotation to close the shutter blades when a photometric value reaches a proper exposure value. The speed of rotation of the shutter opening ring is changed under the control of the governor, by modifying the relative position of the governor to the shutter opening ring by means of a governor control circuit including a photoelectric transducer element which is provided externally of the camera.

Abstract: A photometric apparatus for single lens reflex camera and of the type in which an exposure value is determined by photometry of light which is transmitted through a photographic optical system and is reflected by at least one of the surfaces of a shutter blind and a film, said apparatus comprising a photoelectric transducer element for receiving light reflected by at least one of the surfaces of a shutter blind and a film, and an operational amplifier for biasing the photoelectric transducer element to maintain the voltage applied thereacross substantially null, thereby enabling a photometric output of the photoelectric transducer element to be effectively derived even when the amount of light received is minimal.

Abstract: A focal plane shutter includes a pair of pinions which are integrally provided on the winding drums of a first and a second screen, and a drive gear which is adapted for meshing engagement with the pinions and adapted to rotate to wind up the screens when a film winding operation is desired. The gear is provided with a hiatus of a circumferential length which releases the meshing engagement between the gear and the pinions, and which is normally located opposite to the pinions except for the screen winding operation. During the screen winding operation, the gear initially engages the pinion on the winding drum of the first screen and then engages the pinion on the winding drum of the second screen, thus assuring that the first screen runs first and then the second screen follows, completing a winding operation of both screens while they are in overlapping relationship.

Abstract: A daytime strobo apparatus is provided for a camera which includes an electric shutter, and a control circuit which controls the operation of the electric shutter in accordance with the amount of light incident on a photoelectric transducer element and which is operatively associated with or internally houses a strobo unit. The strobo apparatus comprises a strobo decision circuit in the control circuit which is responsive to the photoelectric transducer element, a decision level adjusting circuit for adjusting an input level from the transducer element to the decision circuit, an X-contact drive circuit responsive to the decision circuit, and the above strobo unit. The apparatus is operative to energize the strobo unit at a timing subsequent to the initiation of operation of the electric shutter which is determined by the operation of the various circuits.

Abstract: A photometric apparatus for single lens reflex camera and of the type in which an exposure value is determined by photometry of light which is transmitted through a photographic optical system and is reflected by at least one of the surfaces of a shutter blind and a film, said apparatus comprising a photoelectric transducer element for receiving light reflected by at least one of the surfaces of a shutter blind and a film, and an operational amplifier for biasing the photoelectric transducer element to maintain the voltage applied thereacross substantially null, thereby enabling a photometric output of the photoelectric transducer element to be effectively derived even when the amount of light received is minimal. The shutter blind is provided with a surface upon which at least two portions thereof have different coefficients of reflectivity to reduce adverse effects of reflected light upon the desired exposure period.

Abstract: A photometric apparatus for single lens reflex camera and of the type in which an exposure value is determined by photometry of light which is transmitted through a photographic optical system and is reflected by at least one of the surfaces of a shutter blind and a film, said apparatus comprising a photoelectric transducer element for receiving light reflected by at least one of the surfaces of a shutter blind and a film, and an operational amplifier for biasing the photoelectric transducer element to maintain the voltage applied thereacross substantially null, thereby enabling a photometric output of the photoelectric transducer element to be effectively derived even when the amount of light received is minimal. The photometric apparatus, including a photoelectric transducer element, a photometry switch and associated circuitry are mounted upon a printed circuit board mounted within the camera to position the transducer element to receive reflected light from the film or the shutter.

Abstract: An electrical focal plane shutter is provided of a type in which subsequent to a running of a first blind of the shutter, a second blind of the shutter is constrained from movement by an electromagnet until a desired exposure period passes, whereupon the electromagnet is deenergized to permit a running of the second blind. The electromagnet is controlled by an electromagnet control device including a light receiving element which is used for photometry. The shutter includes a shutter detent mechanism for preventing a shutter release operation when an electric storage battery contained in an associated camera is exhausted. The shutter further includes a high speed shutter operation control mechanism which assures against the instability of the operation of the electromagnet when the shutter is operating at a high speed, and also includes a manual shutter control mechanism for establishing a shutter operation period of a given length in a purely mechanical manner.