Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1975-12-08
1978-02-14
Corbin, John K.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
350285, 358199, G02B 2717
Patent
active
040735672
ABSTRACT:
A pivoting mirror device for pivoting a pivoting mirror about two mutually perpendicular pivoting axes under the influence of electric control signals, in particular for a video player which reads information from a video disk with the aid of a light beam using optical means, the mirror being journalled so as to be pivotable to all sides and the device comprising electro-dynamic drive means which include permanent magnets and control coils for controlling the pivoting movements. The mirror is supported near its center, while permanent magnetic positioning means which co-operate with permanent magnetic means which are connected to the mirror continually subject the bearing to pressure. In order to obtain a high efficiency the permanent magnetic drive means are magnetized in such a way that the magnetic field lines, at least at the location of the control coils, extend substantially parallel to the reflecting surface of the mirror, while moreover at least a part of the turns of the control coils extend parallel to the reflecting surface and transversely to said field lines.
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patent: 1918358 (1933-07-01), Walton
patent: 2034583 (1936-03-01), Koch
patent: 2535495 (1950-12-01), James
patent: 3532408 (1970-10-01), Dostal
patent: 3544221 (1970-12-01), Putnam
patent: 3871663 (1975-03-01), Stave
patent: 3891299 (1975-06-01), Rushing
patent: 3946166 (1976-04-01), Wossidlo
Lakerveld Herman G.
van Rosmalen Gerard E.
Cohen Simon L.
Corbin John K.
de los Reyes B. W.
Trifari Frank R.
U.S. Philips Corporation
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