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| Number | Title | Issue Date |
| 7338221 | Sector drive mechanism A sector drive mechanism includes an electromagnetic actuator including a rotor having four polarities, a C-shaped stator, and a current control portion that controls current applied to a first coil and a second coil, the C-shaped stator including a first magnetic p... | 03/04/2008 |
| 6152614 | Shutter assembly A shutter assembly has a first sector that moves in a first direction to allow a photographic light flux to pass through and moves in a second direction to block at least a part of the photographic light flux; a second sector that moves in the second dire... | 11/28/2000 |
| 5970268 | Shutter device of camera having a light blocking member with a variable starting position A shutter device having a first light blocking member which travels from a closed state to a fully open state for making exposure, and which is driven by a first motor. A second light blocking member travels from a predetermined position to a closed state... | 10/19/1999 |
| 5802415 | Dual coil actuator A dual coil actuator comprising a pair of independently moveable electrically conductive coils, is characterized in that a single magnet core generates a single magnetic field, and the coils are positioned around the single magnet core, spaced from each o... | 09/01/1998 |
| 5721995 | Lens-fitted photographic film unit having shutter with connection lever and crank lever In a lens-fitted photographic film unit, a connection lever makes one reciprocating movement when struck by a shutter actuating lever. The reciprocating movement of the connection lever is transmitted to a crank lever to a pair of shutter blades to cause ... | 02/24/1998 |
| 5546149 | Focal plane shutter A focal plane shutter for a camera comprises opening and closing blade units operable to open and close a shutter opening of the camera. Each blade unit has a leading blade and trailing blades in superposed relation to the leading blade. The leading blade... | 08/13/1996 |
| 5534961 | Belt drive shutter device A coupling device for controlling the shutter blades of a leaf type shutter. The coupling device includes two or more hubs that are each coupled to a shutter blade and a portion of a base and a continuous belt that is in contact with the hubs so that when... | 07/09/1996 |
| 5532787 | Photographic printing shutter A photographic printing shutter includes a pair of semicircular shutter bodies for cutting off printing light or allowing it to pass, at least one pair of rotatable shafts disposed substantially parallel to the axis of the printing light with the axis the... | 07/02/1996 |
| 5032863 | Camera shutter and viewfinder control apparatus A shutter device for a still video camera comprises first and second shutter blades, a latch member and an unlatch member. The latch member latches the first blade at its moved position where an image pickup element is exposed to an image light. The first... | 07/16/1991 |
| 4935659 | Ultrasonic motor An ultrasonic motor has first and second elastically vibrating rotatable means and third rotatable means interposed between the first and second rotatable means. The first and second rotatable means, which are made elastic disk members, generate mechanica... | 06/19/1990 |
| 4893142 | Device for activating motor-driven shutter blades A device for activating shutter blades relative to a shutter opening and utilizing a control signal from an electronic circuit includes an electric motor rotatable clockwise and counterclockwise according to a control signal from the electronic circuit, a... | 01/09/1990 |
| 4791442 | Camera shutter using an electrostrictive strain element as a driving source A camera shutter using an electrostrictive strain element as a driving source wherein, in order to make it possible to make the driving voltage small and to make an accurate exposure, when the shutter is released, first a reverse voltage is applied to an ... | 12/13/1988 |
| 4786930 | Lens shutter using an electrostrictive strain element as driving source means A lens shutter using an electrostrictive strain element as a driving source, arranging a shutter blades opening and closing lever and the electrostrictive strain element driving the opening and closing lever so that inertia forces acting on the opening an... | 11/22/1988 |
| 4650307 | Electromagnetic actuator An electromagnetic actuator operable with a source of electric current has two overlapping, oppositely movable armatures that are mounted on resiliently flexible cantilever spring members and coupled together by resiliently flexible spring elements, to pr... | 03/17/1987 |
| 4536069 | Two rotary blade camera shutter A first apertured shutter rotates almost a full revolution in a first direction, and a second apertured rotary shutter rotates almost a full revolution in an opposite direction before the apertures of both blades are present at the optical axis to effect ... | 08/20/1985 |
| 4527876 | Exposure control shutter of a camera An exposure control shutter of a camera having an exposure opening, comprising first and second plane shutter blades, each shutter blade having a relatively large aperture and a relatively small aperture. The first and second shutter blades, one being dis... | 07/09/1985 |
| 4183646 | Electrical shutter of electromagnetic release type for camera An electrical shutter includes a locating member which maintains a shutter drive member at rest at its start position and which is constrained in abutment against the drive member in conjunction with a charging member, which rotates in response to a film ... | 01/15/1980 |
| 4003067 | Automatic photographic shutter control apparatus Camera exposure control apparatus utilizing an electronic timing circuit connected to an electromagnet for controlling, through a drive member, the movement of a shutter which opens and closes to establish an exposure interval. A latch, actuated by moveme... | 01/11/1977 |
