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Document |
Document Title |
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7544003 |
Driving assembly of camera shutter and diaphragm
A driving assembly of camera shutter and diaphragm comprises a first stator, a second stator, a coil set and a rotor. The coil set is installed between the first stator and second stator. A first...
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7367722 |
Front and rear curtain shutter device with start area
A shutter device includes a stationary plate having a plurality of driving electrodes movable element opposes the stationary plate and including a sheet subjected to an electret-forming process. A...
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7242123 |
Actuator, light quantity adjusting apparatus, and stepping motor
An actuator maintains high efficiency, can react to an increase in pole, has a high part fit, and can be manufactured at low cost while it is thinned. The actuator includes a magnet which is formed...
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7182530 |
Electrode shutter device with start area
A shutter device includes a stationary plate having a plurality of driving electrodes movable element opposes the stationary plate and including a sheet subjected to an electret-forming process. A...
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6800970 |
Motor and optical apparatus using the same
A motor includes a cylindrical magnet, first outer magnetic pole portions which are formed by gapping part of a cylinder from the distal end in the axial direction of the motor, and which oppose...
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6394668 |
Shutter for camera
A shutter for a camera has a sector driven by a movable board having plural spiral-shaped coil patterns concentrically arranged thereon for generating a repulsive or attractive magnetic field with...
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6033131 |
Hybrid silicon-based micro-electromagnetic light shutter
A hybrid, micro-electromagnetic light shutter includes a silicon body having a top surface with an arcuate groove formed on the top surface. A recess and a light aperture are formed in the top...
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5881449 |
Method of making a microceramic electromagnetic light shutter
A method of making a microceramic electromagnetic light shutter, includes forming a micromolded bottom ceramic portion in the green state with a sacrificial fiber having a first and second end...
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5708893 |
Microceramic electromagnetic light shutter
A microceramic electromagnetic light shutter is disclosed including a unitary ceramic body having an internal cavity. A conductive coil is formed in the internal cavity. The unitary ceramic body...
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4724452 |
Shutter
A shutter is disclosed for use as a high-speed shutter in a camera or an electronic device. The shutter comprises a planar aperture blade which is mounted for reciprocative movement. The aperture...
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4671638 |
Moving coil electromagnetic actuator and shutter employing same
In an electromagnetic actuator of the type having a planar coil armature mounted for movement in a magnetic field by a plurality of planar flexure springs, the flexure springs lie entirely in the...
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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...
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4623233 |
Electromagnetically driven shutter device
An electromagnetically driven shutter device in which a first coil drives shutter blades to control an aperture and shutter time. A second coil controls the moving distance, that is maximum...
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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...
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4558938 |
Twin rotatable electromagnetically driven blade mechanism
There is disclosed an extremely thin electromagnetic rotatable shutter arrangement wherein a stationary magnetic arrangement is intermediate spaced apart portions of armature blades.
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4558937 |
Electromagnetic blade mechanism
There is disclosed an improved electromagnetic actuator for use in shutter applications. Included in the actuator is a magnetic arrangement for minimizing the effects of forces on the actuator...
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4531820 |
Electromagnetic actuator generating equal and opposing force vectors
An electromagnetic actuator is disclosed which develops generally equal and opposing force vectors acting on an armature. This is done by constructing and arranging a permanent magnet assembly, the...
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4514064 |
Electromagnetic shutter
The electromagnetic shutter consists of a plurality of shutter sectors made of plastic material, printed electric coils operatively coupled with the shutter sectors, and permanent magnets fixed to...
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4497557 |
Electromagnetic shutter mechanism
A compact shutter mechanism is disclosed for controlling the unblocking and blocking of a light admitting opening through which light passes along a given path. Included in the mechanism is a...
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4487493 |
Electromagnetically driven shutter
An electromagnetically driven shutter includes combined diaphragm-shutter blades, the opening and closing of which is controlled by a swingable coil arranged in magnetic fields to travel forwards...
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4415252 |
Electromagnetically operated shutter
An electromagnetically operated shutter includes a conductive member which has a number of radial components from the center of rotation of a sector ring, and is arranged on a plane parallel with...
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4413895 |
Electromagnetic actuator having a compliant armature
An electromagnetic actuator of the type having an armature positioned for movement in a magnetic gap is characterized by the armature being sufficiently compliant so as to allow the armature to...
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4349264 |
Electromagnetically driven shutter
In an electromagnetically driven shutter of the type having a shutter driving rotor arranged to rotate on the optical axis of a photograph-taking lens, the shutter driving rotor is provided with a...
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4348094 |
Rotor of electromagnetically driven device for exposure control
Disclosed is an electromagnetically driven device for a camera so designed that an exposure control blade opening and closing sector ring, serving as rotor on the base plate of which sector ring...
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4324471 |
Electromagnetic drive device for camera
An electromagnetic drive device is described for use in a camera to electromagnetically drive the diaphragm or shutter blades. A conductive coil pattern is positioned on the opposite sides of a...
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4319822 |
Electromagnetically operated shutter
An electromagnetically operated shutter device includes a magnetic body and permanent magnets which form a magnetic circuit in the magnetic body. A positioning member for seating the magnets within...
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4079400 |
Optical blade drive apparatus
An optical blade drive apparatus for use in an optical instrument includes a linear motor system which electromagnetically actuates a blade ring for rotation at a high speed. The linear motor...
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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...
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3987473 |
Electromagnetic focal plane shutter
A leading blind and a trailing blind are made of rigid material such as metal sheet and each is provided with at least one permanent magnet. Along the path of the blinds are arranged...
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3654845 |
PHOTOGRAPHIC SHUTTER WITH ELECTRO-MAGNETIC DRIVE MEANS
A photographic shutter having a shutter blade drive ring provided with magnetic coils disposed in the magnetic field of a magnet which is fixed in the housing. When the coils are energized, they...
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