Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7367721 | Bi-stable mechanical photographic shutter An electromagnetically operable rotary shutter is rendered bi-stable by the use of two linear electric motors, one to open the shutter and a second to close the shutter together with a latch that holds the shutter in either an open or a closed position in the absenc... | 05/06/2008 |
| 6899472 | Electromagnetic drive An electromagnetic unit is provided for a lens barrel in which a light exposure controlling unit for controlling an amount of light is integrated. The electromagnetic unit is employed as a drive source for driving shutter blades, and a direction of the movement of a... | 05/31/2005 |
| 6724428 | Shutter and lens apparatus of a digital camera with a stepless focusing function This invention discloses a shutter and lens apparatus including a lens housing for receiving a multi-function support. The multi-function support includes a lens seat fitting with a lens and two solenoid valves attached on its bottom. A shutter slice and a diaphragm... | 04/20/2004 |
| 6157100 | Electromagnetic drive for a focal-plane shutter An electromagnetic drive for a focal-plane shutter of a camera having two light-excluding shutter curtains, each of the two shutter curtains being having its own electric drive motor, which is a linear motor constructed from permanent magnets and electrom... | 12/05/2000 |
| 5081481 | Camera with a shutter A camera, comprising; a shutter for controlling a light amount from outside of camera to a photosensitive material therein; a first driver for actuating shutter, in which a driving movement moves between first position and second position so that the shut... | 01/14/1992 |
| 4462672 | Control circuit for an electromagnetically driven programming shutter The electromagnetically driven programming shutter includes magnets and shutter blade driving coils provided on the respective shutter blades of the shutter and electromagnetically cooperating with the magnets and the shutter blades are actuated for openi... | 07/31/1984 |
| 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 |
| 4171897 | Electromagnetically operated shutter mechanism An electromagnetically operated shutter mechanism comprising first and second shutter members supported for movement in the opposite directions to each other for selectively closing and opening an exposure aperture. Permanent magnets are respectively moun... | 10/23/1979 |
| 4121235 | Electromagnetically operated shutter mechanism An electromagnetically operated shutter mechanism comprising first and second shutter members supported for movement in the opposite directions to each other for selectively closing and opening an exposure aperture. Permanent magnets are respectively moun... | 10/17/1978 |
| 4112450 | Shutter device for a photographic camera A shutter device for a photographic camera uses an electromagnetic driving means for moving back and forth shutter blades to admit light rays to the film for a controlled length of time. In spite of the use of the electromagnetic driving means the shutter... | 09/05/1978 |
