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A fork with timer for providing a cue to a user after an elapsed period of time for indicating that another bite of food using the fork may be taken.
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| Number | Title | Issue Date |
| 8137013 | Electromagnetic shutter for imaging sensors A shutter mechanism for an optical system includes a linear track having a first end and a second end, a first magnetic assembly located adjacent the first end of the track and a second magnetic assembly located adjacent the second end of the track, the two magnetic... | 03/20/2012 |
| 7161745 | Aperture stop mechanism, illumination optical system, projection optical system, and projector An aperture stop mechanism is composed of a small number of components, and accurately controls the position of a member that defines the rim of an aperture. The aperture stop mechanism (2) includes an aperture base plate (21), two aperture blades (... | 01/09/2007 |
| 5854657 | Device for preventing entrance of backlight into optical view finder Device for preventing entrance of backlight into an optical view finder for preventing degradation of an image, including a zoom lens part for adjusting a size and angle of an image signal of an objective in planning a picture frame, a mirror shutter part... | 12/29/1998 |
| 5797055 | Focal plane shutter and method for producing same An extremely durable, super-high speed shutter with speeds of 1/8000 second or faster advantageously increases the blade acceptance rate, reduces the cost, prevents abnormalities such as light leaking between the curtains and the like, contributes to the ... | 08/18/1998 |
| 5608484 | Electromagnetic camera shutter An electromagnetic camera shutter including an electrically conductive shutter blade and electrically conductive springs for urging the shutter blade into a first or a second position from a compressed position between the first and the second position. A... | 03/04/1997 |
| 5489960 | Focal plane shutter device for a camera A focal plane shutter device is provided in which when a rear shutter diaphragm travels in a first direction to retract from a photographing image plane from a state where the rear shutter diaphragm and a front shutter diaphragm shade the photographing im... | 02/06/1996 |
| 5266993 | Focal-plane shutter apparatus A focal-plane shutter apparatus comprises a first plate located on a film-plane side of a mirror box, a second plate located on a film-plane side of the first plate, a third plate located on an opposite side of the first plate to the film-plane side there... | 11/30/1993 |
| 5121148 | Single lens reflex camera A camera 14 has a shutter 42 that is reciprocally movable by a motor 54 that is in positive engagement with the shutter 42. The motor 54 provides harmonic motion to the shutter 42 between its open and closed positions. A second motor 78 advances the film ... | 06/09/1992 |
| 4668067 | Photographic shutter In a photographic shutter, an opening blade and a closing blade are settable in respective tensioned positions from which the blades can be released to first uncover and then recover an exposure opening. A cam device is mounted for unidirectional rotation... | 05/26/1987 |
| 4621916 | Magnetic positioning and contouring of a blade mechanism There is disclosed an arrangement for magnetically maintaining a magnetically permeable and flexible blade mechanism of a photographic apparatus in a preselected orientation with respect to itself and a lens element despite movement of the blade mechanism... | 11/11/1986 |
| 4316661 | Electromagnetically operated shutter In a slit shutter such as a focal plane shutter of the two blade type, the shutter blades and electrically operated magnetic drive means therefor are arranged on opposite sides of respective rotatable transmission means with respect to the axes thereof an... | 02/23/1982 |
| 4313659 | Electromagnetically driven slit exposure shutter In the slit exposure shutter disclosed, front and rear shutter blades carry permanent magnets along a passage of electromagnets which are excited to repel the permanent magnets and cause the blades to float in the gaps of the electromagnets.... | 02/02/1982 |
| 4150890 | Device in camera shutter for maintaining separate blades in intimate contact with each other A plurality of separate shutter blades are arranged in a plane defined between a pair of base plates each having a shutter exposure aperture. Projections are provided on the base plates for urging the respective blades to be held in intimate contact with ... | 04/24/1979 |
| 4134658 | Shutter release system for a camera A shutter release system for a camera having an electric shutter, made so that when a power source battery is exhausted preventing a shutter control circuit from properly functioning, it is detected to block shutter release and an electric control mode is... | 01/16/1979 |
| 4115791 | Film-transporting and shutter-cocking mechanism for still cameras A film-transporting and shutter-cocking mechanism for still cameras of the type in which film is collected in a cassette by a rotary take-up member during forward transport of the film. An input element of the camera having a view finder is movable relati... | 09/19/1978 |
| 4112449 | Stop motion device for motor driven device In a motor driven device having a switch for opening and closing an electric circuit for driving a motor, a stop motion device adapted to transmit the drive of the motor to produce an output comprises first transmission means displaceable between a closin... | 09/05/1978 |
| 4082435 | Optical switch A bistable optical switch for use in control of fiber optic light transmission for blocking one path while opening another is provided having at least a single movable member which may be positionable within a guide member for interrupting at least one op... | 04/04/1978 |
| 4051502 | Multiple element focal plane shutter for photographic cameras Two sets of lamellas are moved across the image aperture in a photographic cameras, whereby the lamellas of each set move in different but parallel planes. Each lamella is coupled to a crank pin and the pins are, on the one hand, guided for movement in pa... | 09/27/1977 |
| 4051499 | Linear motor-driven focal plane shutter A leading blind and a trailing blind are made of opaque plastic sheet material. Each blind has a thin permanent magnet sealed within it along a plane approximately bisecting its thickness. Along the path of each blind is arranged at least one series of el... | 09/27/1977 |
| 4024555 | Focal plane shutter for cameras A focal plane shutter for cameras comprising two sets of shutter blades each of which comprises a plural number of opaque thin plates supported by two supporting arms, a partition plate for separating said two sets of shutter blades from each other, a pai... | 05/17/1977 |
| 4015277 | Shutter device for a camera A shutter device for a camera in which the film has frame perforations, is designed so that the operation means is functionally engaged with the film winding up mechanism in such a manner that the operation lever of the operation means moves as one body w... | 03/29/1977 |
| 3988754 | Fast operating slit shutter camera This invention is directed to a photographic camera having a slit shutter which utilizes two cover systems which operate above the plane of the image. These systems are movable perpendicularly to the direction of movement of the film within the camera. Ea... | 10/26/1976 |
