Claims
- 1. A focal-plane shutter comprising a base member having an aperture, shutter blades for opening and closing said aperture, and pivotal support means on said base member operable in a parallelogrammatic configuration to move said blades between open and closed positions to thereby open and close said aperture, said pivotal support means having adjusting means for adjusting the tilt of one blade relative to another blade to provide for parallel movement of said blades and uniformity of exposure of said aperture during opening and closing of said aperture by said blades.
- 2. A focal-plane shutter comprising a base plate having an aperture, two sets of shutter blades for opening and closing said aperture, said two sets of shutter blades each being provided with a plurality of opaque plates, and pivotal arm means pivotably connected to said base plate at two spaced pivot connections and pivotably connected to at least one plate of one set of shutter blades at two spaced pivot connections in a substantially parallelogrammatic configuration such that the plates are moveable between open and closed positions to thereby open and close said aperture, and adjusting means on said pivotal arm means for adjusting the orientation of one plate of one set of shutter blades relative to one plate of another set of shutter blades to provide for parallelism of said plates of said two sets of shutter blades and uniformity of exposure of said aperture as said blades open and close said aperture.
- 3. A focal-plane shutter comprising a base plate having an aperture, two sets of shutter blades for opening and closing said aperture, said two sets of shutter blades each being provided with a plurality of opaque plates, a pair of arm means for pivotably supporting said plates on said base plate in a substantially parallelogrammatic configuration for movement between open and closed positions to thereby open and close said aperture, and adjusting means on said arm means and on said base plate for adjusting inclination of one plate relative to another plate to thereby provide for parallel movement of said blades as said blades open and close said aperture.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-61939 |
May 1988 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 346,100, filed May 2, 1989, now U.S. Pat. No. 4,954,860.
US Referenced Citations (7)
Divisions (1)
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Number |
Date |
Country |
Parent |
346100 |
May 1989 |
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