Optic fiber shutter apparatus

Photocopying – Contact printing – Light boxes

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

355 71, G02B 2602, G02B 2772

Patent

active

047782544

ABSTRACT:
An apparatus for selectively shuttering a light aperture or channel which includes a shutter blade that is rapidly moved by magnetic force between spaced apart end positions. The shutter apparatus maintains the shutter blade stable in either of the two end positions by magnetic attraction, and preferably provides a third stable position for the shutter blade which is intermediate the two end positions, such that the shutter blade has three stable positions corresponding to full, partial and no shuttering of the aperture or channel. In one embodiment, the shutter blade is part of a flag carried by a torsion beam which is fixed at one end in a mount in a cantilever arrangement, and is free to twist about its longitudinal axis. An elongated permanent magnet extends transverse to the flag and presents poles of opposite polarity. An electromagnetic system effects the movement of the elongated permanent magnet, and hence the selective movement of the flag and shutter blade, by attracting and/or repelling the permanent magnet between two end stops. The electromagnetic system includes an E-shaped pole piece of ferromagnetic material which presents three poles. The two outermost poles each have an electrically conductive winding thereon, thereby forming first and second electromagnets. The middle and salient pole is equidistant between the end poles and facilitates the movement of the permanent magnet.

REFERENCES:
patent: 1964062 (1934-06-01), Jenkins
patent: 2461379 (1949-02-01), Hamilton
patent: 2687611 (1954-08-01), Larsen
patent: 2774276 (1956-12-01), Glasser et al.
patent: 2934647 (1960-04-01), Blake
patent: 3088388 (1963-05-01), Tredopp
patent: 3166635 (1965-01-01), Todt
patent: 3191516 (1965-06-01), Corcoran
patent: 3275831 (1966-09-01), Martin
patent: 3329074 (1967-07-01), Gosselin
patent: 3493292 (1970-02-01), Dostal
patent: 3654845 (1972-04-01), Fahlenberg et al.
patent: 3687042 (1972-08-01), Mizui et al.
patent: 3698099 (1972-10-01), Matsura
patent: 3704059 (1972-11-01), Bertram
patent: 3781092 (1973-12-01), Sussman et al.
patent: 4001844 (1977-01-01), McClintock
patent: 4033693 (1977-07-01), Payrhammer et al.
patent: 4082435 (1978-04-01), Zeitz
patent: 4088405 (1978-05-01), Pustka et al.
patent: 4165919 (1979-08-01), Little
patent: 4170731 (1979-10-01), Howell et al.
patent: 4332450 (1982-06-01), Griffith

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Optic fiber shutter apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optic fiber shutter apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optic fiber shutter apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1191121

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.