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| Number | Title | Issue Date |
| 7104708 | Sector drive unit for camera A sector drive unit for a camera includes sectors capable of opening and closing an aperture provided on a base plate. A first actuator drives the sectors to open and close the aperture, and a drive force transmitting mechanism transmits a driving force of the first... | 09/12/2006 |
| 4593985 | Automatic photographing device for video camera An automatic photographing device for a video camera which permits the photographer to enter the picture before the picture recording operation is started and times the picture recording operation to automatically stop after a predetermined period of time... | 06/10/1986 |
| 4563069 | Control system for carrying out focus detection and light measurement of a camera Disclosed is a control system for carrying out the focus detection and the light measurement of a camera by means of which after the termination of the exposure the next focus detection and the next light measurement are controlled systematically so as to... | 01/07/1986 |
| 4550997 | Automatic exposure control circuit An automatic exposure control circuit of a photographing camera having a shutter blade associated with an electromagnet driven by a driving circuit is disclosed, which is featured by having a film sensitivity information detector for detecting the film se... | 11/05/1985 |
| 4544257 | Automatic exposure control for a camera shutter The specification discloses an automatic shutter timing control for a camera. A voltage supply is applied to a capacitor (38). An electronic switch such as a PMOS gate (44) has conductive and non-conductive states and is connected across the capacitor (38... | 10/01/1985 |
| 4497563 | Programmed automatic exposure control An automatic exposure control method and device has photometry means for detecting the brightness of a subject and providing an output signal in response thereto, a shutter, driving means for driving the shutter toward a full aperture, closing means for c... | 02/05/1985 |
| 4491405 | Camera suitable for flash photography The present invention has two photometric circuits, namely photointegrating circuits, one of them is for day light photography and other is for flash photography. Normally the photointegrating circuit for flash photography is retained inoperatable, but wh... | 01/01/1985 |
| 4491404 | Flash photography system There is provided a flash photography system which allows control of a relation between a light emission duration of a flash device and a full-open time of an exposing aperture of a focal plane shutter in an ideal condition. In the system, an electronic f... | 01/01/1985 |
| 4474451 | Diaphragm control circuit for TTL automatic electronic flash A diaphragm control circuit associated with TTL automatic electronic flash is adapted to be used in a camera of the TTL direct photometry type and capable of photometry of light reflection from film surface. When the electronic flash is mounted on the cam... | 10/02/1984 |
| 4472044 | Semiconductor integration circuit A semiconductor switch circuit includes a switching transistor circuit having switching transistors connected in two stages, a follower circuit comprising a condenser for integration, a power source circuit, the switching transistor circuit connected betw... | 09/18/1984 |
| 4466727 | Shutter control circuit equipped with a flash light control signal circuit A camera shutter utilizes a single photoelectric element in conjunction with a shutter control circuit for controlling the automatic exposure operation of the shutter in dependence on the integrated value of the ambient light received from an object field... | 08/21/1984 |
| 4459007 | Apparatus for reflection photometry of a single lens reflex camera An apparatus for reflection photometry of a single lens reflex camera includes a first shutter blind, the surface of which exhibits a reflectivity which is nearly one-half the reflectivity of a film surface. During the time a photoelectric transducer elem... | 07/10/1984 |
| 4396269 | Shutter release locking device A camera comprises an automatic exposure control device having a comparing circuit adapted for comparing a time output signal indicating the time from the shutter aperture opening function with a proper output signal indicating an appropriate exposure tim... | 08/02/1983 |
| 4374615 | Exposure control circuit for cameras equipped with self-timer An exposure control circuit for cameras equipped with a self-timer comprises an RC integrating circuit including a capacitor and a resistance for determining an automatic shutter releasing period and a time constant setting circuit employing the same capa... | 02/22/1983 |
| 4367022 | Exposure control circuit for camera of TTL reflective photometry type An exposure control circuit for camera of TTL reflective photometry type includes a shutter blind of a lower reflectivity than that of a film. The circuit is arranged such that until a given proportion of the film surface becomes exposed as a result of ru... | 01/04/1983 |
| 4363542 | Camera and electronic flash combination A camera and electronic flash combination is provided which permits the electrical circuits of a camera and an electronic flash to be coupled to each other through four terminals, thus achieving an efficient transfer of signal between both units. The elec... | 12/14/1982 |
| 4353631 | Exposure information input circuit for electric shutter In an electric shutter having a photoelectric element, a time constant circuit for use in controlling exposure and a low brightness sensor circuit for use in connecting said photoelectric element in series with a comparator resistance and in sensing a low... | 10/12/1982 |
| 4350427 | Electromagnetic shutter release device for cameras An electromagnetic shutter release device is provided with an electromagnet including an armature. A control circuit including two delay circuits are connected to the electromagnet for energizing same for a first period upon the initiation of the shutter ... | 09/21/1982 |
| 4329030 | Integrating time detector for photographic apparatus 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.... | 05/11/1982 |
| 4318600 | Programmed shutter control circuit An electronic shutter control circuit comprises a photo-conductive material producing a signal to be applied to the first transistor, a second transistor having a base connected to its collector, the second transistor being serially connected to the first... | 03/09/1982 |
| 4317621 | Exposure control apparatus for use with a camera having electronic flash controlling capability An exposure control apparatus for use with a camera having electronic flash controlling capability and including a photometric circuit activated by a trigger switch which is operated in response to a shutter release operation is disclosed. The exposure co... | 03/02/1982 |
| 4305648 | Electric circuits for use in camera The electric circuit for use with a camera is capable of controlling exposure and alarming camera vibrations and obviating wrong display of a camera vibration alarm means and improper operation of a shutter of the camera.... | 12/15/1981 |
| 4300825 | Control of shutter closing for excessive object brightness In a camera shutter control system, film exposure is ensured even when object brightness is so high as to require a shutter speed faster than the maximum shutter speed available and at which shutter operation might not cause film exposure without the pres... | 11/17/1981 |
| 4279485 | Electromagnetic drive system for photographic shutters An electromagnetic drive system for actuating the shutter blades in photographic devices, preferably in picture taking cameras, comprises a permanent magnet mounted on a magnetically conductive base plate and a first and a second solenoid on either side o... | 07/21/1981 |
| 4273429 | Electric shutter device provided with an electric self-timer An electric shutter device wherein an armature lever is attracted by an electromagnet by making a large current flow to the electromagnet only when the operation of a self-timer ends so that a normal exposure operation may be thereby started in order to m... | 06/16/1981 |
| 4272170 | Photographic arrangement using various electronic flash devices In the arrangement disclosed, a photographic camera operates both with an electronic flash that generates a charge completion signal and a flash without a charge completion signal. In the camera, two switching elements shift between a time constant set fo... | 06/09/1981 |
| 4272168 | Photographic camera of automatic exposure control type A photographic camera of an automatic exposure control type has an electrical shutter of electromagnetic release type and also has a front cover slidably disposed across the front surface of a camera body between a first position in which it closes a taki... | 06/09/1981 |
| 4270851 | Automatic film sensitivity setting system for camera In an electric shutter control circuit capable of properly controlling exposure in response to information concerning exposure parameters, such as subject brightness, the trigger level of the switching circuit controlling the exposure operation is automat... | 06/02/1981 |
| 4269493 | Electromagnetic camera shutter control device An electromagnetic shutter control device for controlling opening and closing operation of the shutter of a compact folding camera includes a bobbin having a magnetic winding therearound, a stationary permanent magnet over which the bobbin fits for magnet... | 05/26/1981 |
| 4264163 | Exposure control apparatus with compensation for film reciprocity failure A camera includes a photographic film having a given film speed which decreases when the film is exposed to light which varies from a given illumination level. A camera shutter is controlled by a timing circuit adapted to produce an exposure which is adju... | 04/28/1981 |
| 4256391 | Flash responsive exposure time control system An exposure time control system includes a circuit which denergizes a shutter control circuit and an electromagnet and causes a shutter closure when an electronic flash device is triggered to fire an electronic flash tube. The system further includes a po... | 03/17/1981 |
| 4236801 | Exposure factor switching circuit An exposure factor switching circuit in a camera with an exposure control circuit having an emitter follower transistor adapted to apply a voltage through at least one transistor driven by a current flowing in the emitter thereof. A time constant circuit ... | 12/02/1980 |
| 4214825 | Shutter control means with auto strobo for electrical shutter camera A means for use with an auto strobo unit for a camera of the type having an electrical shutter comprises a delay circuit in the auto strobo unit which circuit includes a capacitor and a resistor connected in series and adapted to cooperate with the X cont... | 07/29/1980 |
| 4209245 | Long time exposure preventing device for camera with electronic flash A signal indicating that the correct exposure value has been achieved and a signal indicating the completion of flash are logically summed to provide a shutter closing signal. This ensures that the shutter will be closed even when the light emitted by the... | 06/24/1980 |
| 4196995 | Electronically operated magnetic control device for camera The disclose circuit energizes a magnetic winding of a shutter actuating device. A constant voltage circuit is connected across the magnetic winding, or between the power supply terminal of the magnetic winding and a basic potential to ensure that the res... | 04/08/1980 |
| 4195921 | Photographic apparatus with means for differently indicating the intensity of scene light for differently sensitive films A photographic apparatus which can accept cassettes for high-speed or lower-sensitivity film has a mechanical or electronic switch which automatically deactivates a light-emitting diode which serves to indicate the intensity of scene light as soon as a ca... | 04/01/1980 |
| 4190335 | Shutter controlling aid means for use with camera A means is provided for use with a camera of the type having an electrical shutter and which is adapted to utilize a strobo unit. The said means comprises a first circuit including a capacitor and a resistor connected in series across the X contacts of sa... | 02/26/1980 |
| 4188104 | Automatic control device for electronic flash A photographic device includes means for automatic control of the quantity of light from an electronic flash by comparing the brightness of a main object to be photographed with the brightness of a sub-object to be photographed, and the shutter of the cam... | 02/12/1980 |
| 4181413 | Electronic shutter control circuit An electronic shutter control circuit in a camera has an operational amplifier, a light receiving element connected between the input terminals of the operational amplifier and a logarithmic compression diode, one terminal of which is connected to the cat... | 01/01/1980 |
| 4180310 | Photometric circuit A novel photometric circuit for a camera is disclosed wherein the operational amplifiers common to conventional photometric circuits are eliminated from that part of the circuit which solves the exposure Apex indication equation: Sv +Bv | 12/25/1979 |
