Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1976-04-28
1978-07-11
Cardillo, Jr., Raymond F.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
1791003V, 350 65, 350285, H04N 576, G11B 708, G02B 2717
Patent
active
041005767
ABSTRACT:
An optical beam controller for use in an image reproducing system, in which information is stored in the spiral track of a disc record and retrieved by scanning the track with a light beam, comprises first and second ring-shaped axially poled magnets. The second magnet has a pivot bearing and is supported upon a pin coaxially with and in such proximity to the first magnet as to be mechanically captivated upon the pin by that magnet while remaining free for tilting displacement with respect to a pair of orthogonal axes. A mirror is coupled to the second magnet for concurrent displacement therewith when an energized electromagnet, which reacts with the field of the second magnet, effects a desired displacement of that magnet and the mirror about one or both axes. A damper, disposed adjacent the second magnet, responds to the magnetic field of the second magnet to develop a counter electromagnetic force that reacts with the field of the second magnet to arrest any undesired movement of the second magnet about its support pin.
REFERENCES:
patent: 653881 (1900-07-01), Pollak
patent: 3624284 (1971-11-01), Russell
patent: 3673412 (1972-06-01), Olson
patent: 3946166 (1976-03-01), Wossidlo
patent: 4011003 (1977-03-01), Dragt
patent: 4021096 (1977-05-01), Dragt
Cardillo, Jr. Raymond F.
O'Connor Cornelius J.
Zenith Radio Corporation
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