Patents by Inventor Joannes A. E. Van Der Kop

Joannes A. E. Van Der Kop has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5495369
    Abstract: An apparatus for recording an electric signal (A) on a magnetic record carrier (1) includes at least one pair of write heads (K.sub.1, K.sub.2) having a mechanically rigid coupling to each other and arranged on a head drum (40). The record carrier (1) is wrapped around the head drum through a wrapping angle .alpha.. The pair of heads (K.sub.1, K.sub.2) writes pairs of tracks (T.sub.1, T.sub.2 ; T.sub.3, T.sub.4 ; . . . ) on the record carrier. The apparatus further includes a signal separator (4) for dividing the electric signal into consecutive blocks, after which the signal blocks having odd sequence number (B.sub.1, B.sub.3, . . . ) are applied to a first output (5) and the signal blocks having even sequence number (B.sub.2, B.sub.4 . . . ) are applied to a second output (6). In a time-base correction circuit (7) the signal blocks (A.sub.1, A.sub.2) are time expanded or compressed. .alpha. Differs from 180.degree..
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: February 27, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Albert M. A. Rijckaert, Joannes A. E. Van Der Kop
  • Patent number: 5412515
    Abstract: An apparatus for recording an electric signal (A) on a magnetic record carrier (1) includes at least one pair of write heads (K.sub.1, K.sub.2) having a mechanically rigid coupling to each other and arranged on a head drum (40). The record carrier (1) is wrapped around the head drum through a wrapping angle .alpha.. The pair of heads (K.sub.1, K.sub.2) writes pairs of tracks (T.sub.1, T.sub.2 ; T.sub.3, T.sub.4 ; . . . ) on the record carrier. The apparatus further includes a signal separator (4) for dividing the electric signal into consecutive blocks, after which the signal blocks having odd sequence number (B.sub.1, B.sub.3, . . . ) are applied to a first output (5) and the signal blocks having even sequence number (B.sub.2, B.sub.4 . . . ) are applied to a second output (6). In a time-base correction circuit (7) the signal blocks (A.sub.1, A.sub.2) are time expanded or compressed. .alpha. Differs from 180.degree. .
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: May 2, 1995
    Assignee: U.S. Philips Corporation
    Inventors: Albert M. A. Rijckaert, Joannes A. E. Van Der Kop
  • Patent number: 5060092
    Abstract: In an apparatus for recording an electric signal on a magnetic record carrier (1) in tracks (T.sub.1, T.sub.2, . . . etc.) which are inclined relative to the longitudinal direction of the carrier the write head (4) comprises two head halves (K.sub.1, K.sub.2). The apparatus further comprises a signal source (3) for supplying a first and a second tracking signal (f.sub.1, f.sub.2) which are applied to the head halves (K.sub.1 and K.sub.2 respectively) of the write head for simultaneously recording the first and the second tracking signal, respectively in the first and the second track half of a track, in such a way that during the recording of consecutive tracks on a record carrier the first and the second tracking signals are recorded only in every n-th track (FIGS. 1 and 2a), n being an integer greater than 1 and preferably equal to 2. An apparatus for reproducing the electric signal recorded by means of said apparatus is also described.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: October 22, 1991
    Assignee: U.S. Philips Corporation
    Inventor: Joannes A. E. van der Kop
  • Patent number: 4816927
    Abstract: Rotatable head support (6) carries at least one magnetic head (7) which scans the tracks of a magnetic tape (1) guided across an arcuate guide surface (5) over an angle smaller than 180.degree.. The angle of inclination (.alpha.) of a head relative to a reference plane (100) is adjustable by a rack (13) and a pinion (15) to enable the tracks (26) to be followed at tape speeds (n.multidot.V.sub.0) which vary relative to a nominal tape speed (V.sub.0). Tape speed detection means (22) derive a control signal used to adjust the angle of inclination (.alpha.) in conformity with a formula containing the playback factor (n) and other parameters in order to enable a comparatively high tape speed (n.multidot.V.sub.0) to be used, starting from a specific maximum acceptable tracking error.
    Type: Grant
    Filed: November 4, 1987
    Date of Patent: March 28, 1989
    Assignee: U.S. Philips Corp.
    Inventors: Alvert M. A. Rijckaert, Joannes A. E. Van Der Kop