Electromagnetic device for providing a hard stop for moving blad

Details Electromagnetic device for providing a hard stop for moving blad Electromagnetic device for providing a hard stop for moving blad

1996-11-18

1998-07-14

Perkey, W. B.

Photography

Camera detail

Shutter

396468, 396508, G03B 902, G03B 908

Patent

active

057818169

ABSTRACT:
An hard stop is disclosed for use with an aperture mechanism that has at least one blade moveable along a path between a closed position and at least one open position, and at least one hard stop piston that is moveable between a first position, out of the blade path, and a second position, in the blade path, to position the blade in the open position when an edge of the blade contacts the hard stop piston. The hard stop includes a nonmagnetic piston; a ferromagnetic C-core, having first and second pole tips, a magnet attached to the piston and a coil wrapped around the midportion of the C-core. When current is applied in one direction through the coil it causes the magnet and attached piston to move in a first direction to the first position and held in such position by the attraction of the magnet to the first pole tip of the C-core and causes the magnet and attached piston to move to the second position when current is applied in an opposite direction to the coil where it is held in such position by the attraction of the magnet to the second pole tip of the C-core.

REFERENCES:
patent: 3635141 (1972-01-01), Starp et al.
patent: 4760420 (1988-07-01), Lan
patent: 5432576 (1995-07-01), Gregory
patent: 5619296 (1997-04-01), Furlani et al.

Affiliated with

Also associated with

Rating

Electromagnetic device for providing a hard stop for moving blad does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electromagnetic device for providing a hard stop for moving blad, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic device for providing a hard stop for moving blad will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1893562