Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1978-03-13
1979-10-09
Konick, Bernard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
1791001B, 1791004R, 274 23R, H04N 576
Patent
active
041707834
ABSTRACT:
A signal pickup device is used in an apparatus for reproducing an information signal recorded in a track on a horizontal surface of a rotary recording medium. The signal pickup device comprises a reproducing stylus for tracing the track to reproduce the information signal. A cantilever arm is supported by way of a damper to be rotatable about substantially the proximal end thereof. The arm is movable in an axial direction thereof. The reproducing stylus is mounted at a free distal end of the arm. A permanent magnet member is fixed to the proximal end of the cantilever arm with the magnetic poles on the opposite lateral faces extending in the axial direction of said cantilever. A tracking control coil is mounted with a pair of winding surfaces extending substantially in a vertical direction, to confront the faces of the magnetic poles. A tracking control signal current is generated in response to a tracking error and supplied to the tracking control coil. The tracking control signal current flows in opposite directions through the pair of vertical winding surfaces. The permanent magnet member rotates about a hypothetically vertical axis for rotating the cantilever, due to a mutual reaction between the magnetic field and the tracking control signal current. Thus, the reproducing stylus is displaced so as to trace the track in a proper tracing position.
REFERENCES:
patent: 3381086 (1968-04-01), DeMoss
patent: 3527900 (1970-09-01), Muttick
patent: 3872241 (1975-03-01), Adler
patent: 3973080 (1976-08-01), Dickopp
patent: 3983318 (1976-09-01), Miller
patent: 3987255 (1976-10-01), Kawakami
patent: 4059277 (1977-11-01), DeStephanis
Faber Alan
Konick Bernard
Victor Company of Japan Ltd.
LandOfFree
Signal pickup device for reproducing an information signal recor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal pickup device for reproducing an information signal recor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal pickup device for reproducing an information signal recor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1967075