Electromagnet apparatus and apparatus for adjusting exposure of

Details Electromagnet apparatus and apparatus for adjusting exposure of Electromagnet apparatus and apparatus for adjusting exposure of

1995-09-28

1996-08-20

Gellner, Michael L.

3542711, 3542351, G03B 908, G03B 907

Patent

active

055483674

ABSTRACT:
The present invention relates to an exposure adjusting apparatus having a bobbin in the form of a cylinder through which a photographing light beam is able to pass and around which a coil comprising an insulating and coated conductive wire is wound, a core fixed to and supported by the bobbin to cover at least a portion of the surface of the coil around the bobbin and having a V-shaped cut portion serving as a first pole head, the force of which acts in a direction of the surface of the coil, a rotor rotatively supported around the center of winding of the coil and having a V-shaped projection opposing the V-shaped cut portion of the core.

REFERENCES:
patent: 3185063 (1965-05-01), Ford et al.
patent: 4100558 (1978-07-01), Koike et al.
patent: 4227792 (1980-10-01), Rentschler
patent: 4609273 (1986-09-01), Kaise
patent: 4695145 (1987-09-01), Kawamoto

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