 Electric contact material and a manufacturing method therefor |
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| Nickel alloy |
| OF PREFERRED EMBODIMENT The alloy of the present invention comprises 8 to 34 atom% of Al, 2 to 70 ... |
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| Magneto-optic memory allowing direct overwrite of data |
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| Thin-film recording medium with soft magnetic layer |
| In one aspect, the invention includes an improvement in a longitudinal magnetic recording medium ... |
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| Metal thin film magnetic recording medium and manufacturing method thereof |
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| Fuel cells employing integrated fluid management platelet technology |
| OF THE BEST MODE The following detailed description illustrates the invention by way of example, ... |
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| Liftable driver's seat for automobiles |
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| Seat adjuster |
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| Self-stripping electrical connector and terminal |
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| Insulated wire termination device |
| OF THE INVENTION Referring now to the drawings, FIG. 1 illustrates partially in section an ... |
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Recording system having head transducers with controlled skew
| Details |
Inventors: Eggebeen, James A.;
Assignee: Carlisle Memory Products Group Incorporated (North Richland Hills, TX)
Primary Examiner: Psitos; Aristotelis M.
Assistant Examiner: Garland; Steven R.
Attorney, Agent or Firm: Samuels, Gauthier & Stevens
A magnetic recording system including a write head comprising a write transducer having a gap configured at an angular orientation with respect to direction of travel of an adjacent magnetic medium. Servo information is recorded by the write head into a servo, or higher coercivity, layer of the magnetic medium in a plurality of parallel, adjacent tracks and at an angle corresponding to the angular orientation of the write transducer. The servo information is at one of two frequencies, with adjacent tracks being at different frequencies with respect to each other. A read head includes a first transducer configured at an orientation corresponding to the angular orientation of the servo information. The first transducer and its related circuitry detect information from the parallel servo tracks, and generate an error signal indicating actual position of the second transducer as compared to its desired position with respect to the servo tracks. The error signal is used by a control circuit for positioning the first transducer. A second transducer is configured in tandem alignment to the first transducer, but is oriented at an angle sufficiently different from that of the first transducer so that the second transducer detects substantially none of the servo information. The second transducer reads and writes data in a data, or lower coercivity, layer of the magnetic medium. Circuitry is provided which uses the servo information for synchronization to achieve accurate reading and writing of data at a high level of lineal density in the magnetic medium. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The invention is best understood by reference to the figures wherein like parts are designated with like numerals throughout.
One presently preferred embodiment of the magnetic recording system of the present invention is illustrated in FIG.
1.
In particular, the system of FIG.
1 includes a housing 20, which is preferably comprised of a material such as brass or ceramic and configured in the form of a block having an interior cavity for securing magnetic cores or transducers (not shown).
To accomplish its purpose, the housing 20 is placed adjacent a magnetic medium 22 such as a magnetic tape, so that the transducers in the housing are positioned in proximity to the magnetic medium 22.
As the magnetic medium passes adjacent the housing 20, data is read or written on the magnetic medium by the transducers.
In the preferred embodiment of the present invention, the magnetic medium 22 is bimodal in construction, comprising at least two different magnetic layers having different coercivities, with the preferable configuration being in the form of a magnetic tape.
Such magnetic media, along with their method of manufacture are disclosed in U.
S.
Pat.
No.
4,237,189 to Deffeyes entitled "Polymodal Magnetic Recording Medium Process for Making and Verifying the Same and Compositions Useful Therein;" and in U.
S.
Pat.
No.
4,281,043 to Deffeyes entitled "Polymodal Magnetic Recording Medium and Compositions Useful Therein.
" Both of these Deffeyes references are hereby incorporated herein by reference.
A cross-sectional view of the magnetic medium 22 is presented in FIG.
1, illustrating the physical construction of the magnetic medium, as well as a schematic representation of the servo information that is placed within that medium.
Specifically, the medium 22 comprises a substrate 24 such as a polyethylene terephthalate for providing structural support to the other components of the magnetic medium Upon the substrate 24 is a layer of high coercivity material referred to herein as the servo layer 26
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Metal Working 
