Abstract: A system includes a self-servo-write (SSW) module and a control module. The SSW module generates servo signals and a control signal. The control module generates a first current to bias an actuator arm against a spring when the control signal is received and discontinues the first current to release the spring and accelerate the actuator arm when the SSW module generates the servo signals.

Abstract: An embodiment of a slider in accordance with the present invention for use in a hard disk drive having a rotatable disk can include a plurality of rails arranged across a surface of the slider such that an air bearing is formed when the slider is positioned over the disk and the disk is rotated such that the slider traverse a servo wedge of the disk. The surface of the slider further includes a trailing pad arranged near a trailing edge of the surface of the slider such that when the slider traverses debris having a height higher than minimum height, the air bearing increases such that the slider is not in communicative proximity with the disk for a time at least as long as a time for the slider to traverse the servo wedge.

Abstract: A disk drive includes a disk having a first servo burst written with advancing phase as a radial distance on the disk increases, and a second servo burst written with decreasing phase as a radial distance on the disk increases, and a transducing head, and a read channel. The disk drive also includes an element for shifting the phase of the signal produced by the first burst pattern with respect to the signal produced by the second burst pattern by an amount sufficient to substantially cancel distortion in a signal produced by the first servo burst with distortion in a signal produced by the second servo burst when the signal from the first servo burst is added to the signal from the second servo burst.

Abstract: A tourniquet is provided which is specifically structured to be easily and quickly applied to an extremity of a body and to be securely positioned in place on the extremity, the tourniquet being particularly structured for self-use by a wounded person under the stressful conditions of the battlefield and being structured to be used single-handedly.

Abstract: An embodiment of a slider in accordance with the present invention for use in a hard disk drive having a rotatable disk can include a plurality of rails arranged across a surface of the slider such that an air bearing is formed when the slider is positioned over the disk and the disk is rotated such that the slider traverse a servo wedge of the disk. The surface of thes lider further includes a trailing pad arranged near a trailing edge of the surface of the slider such that when the slider traverses debris having a height higher than a minimum height, the air bearing increases such that the slider is not in communicative proximity with the disk for a time at least as long as a time for the slider to traverse the servo wedge.

Abstract: Embodiments of the present invention enables the trimming and writing of servo bursts in a null burst servo pattern as multiple portions in multiple passes while still demodulating each of the servo bursts as a single burst to obtain PES. Alternatively, the servo bursts can be trimmed and written using different currents in different passes respectively so that a gap can be created in the radial direction between the servo bursts. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.

Abstract: The minor coherence-errors suffered during servowriting of bursts in a phase burst servo pattern may contribute to significant written-in runout of the resulting pattern. Embodiments of the present invention enables the servowriting of both the zig/zag bursts and/or the digital information of the phase burst pattern all in one single revolution so that the common coherence errors of the zig/zag bursts can be canceled during demodulation. Such single pass servowriting of both zig/zag bursts can be accomplished by either using additional phase-adjustment circuitry or by shifting the phase of the write clock to allow servowriting of the bursts and/or digital information all at edges of (different) integer clock cycles. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.

Abstract: The minor coherence-errors suffered during servowriting of bursts in a phase burst servo pattern may contribute to significant written-in runout of the resulting pattern. Embodiments of the present invention enables the servowriting of both the zig/zag bursts and/or the digital information of the phase burst pattern all in one single revolution so that the common coherence errors of the zig/zag bursts can be canceled during demodulation. Such single pass servowriting of both zig/zag bursts can be accomplished by either using additional phase-adjustment circuitry or by shifting the phase of the write clock to allow servowriting of the bursts and/or digital information all at edges of (different) integer clock cycles. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.

Abstract: A marine structure adapted to be at least partially submerged at an offshore body of water to drill wells into the ocean floor and to produce fluids therefrom. A corrosion deterrent system for protecting the submerged members of the structure comprises sacrificial anodes which are disposed about the structure's jacket.A drilling template carried on the jacket comprises means to a plurality of drilling conductors therein. At least one upright column incorporated into said drilling template is provided with discretely placed sacrificial anodes arranged to best protect the drill conductors.

Abstract: A protective sleeve for fitting about the periphery of the leg of an offshore structure. The sleeve comprises means for carrying and enclosing a plurality of conductors. It further includes one or more inner rings; an outer jacket is fixedly spaced from the rings to define longitudinal passages within which the respective conductors are fixedly positioned. The sleeve is capable of deflecting packed ice and floating objects which represent possible sources of damage to the structure or to conductors.

Abstract: There are described compounds of formula I, ##STR1## IN WHICH R is allyl, chlorine, bromine, phenyl, or phenyl substituted by one or more halogen or alkyl groups,One of X and Y is a group --CO--, --CHOH-- or --CH.sub.2 -- and the other is an exocyclic carbon-carbon bond linking the ferrocenyl or the R group respectively to the --A-- group,A contains 5, 6 or 7 carbon atoms and is an ethylenically unsaturated (the double bond being connected to the carbon atom which is connected to X), unsubstituted (except by X and Y) cyclic hydrocarbon group; or is a saturated cyclic hydrocarbon group substituted by X and Y and, when X is a group --CO--, optionally substituted on the carbon atom to which Y is attached by an --OH group, andX and Y are attached to adjacent carbon atoms on the A group. There are also described processes for the production of compounds of formula I and haematinic compositions containing them.

Abstract: These are described compounds of formula I, ##STR1## in which R is a cycloalkyl group, N IS 0, 1 OR 2,R' is hydrogen, phenyl, alkyl C 1 to 6, cycloalkyl C 4 to 6, alkyl-cycloalkyl C 5 to 8, or phenyl-(alkyl C 1 to 6),x is a whole number from 0 to 8, andy is a whole number from 0 to 5.There are also described processes for making the compounds and pharmaceutical, e.g. haematinic, compositions containing the compounds.

Abstract: A drill press that is hydraulically driven; the drill press including a turbine motor through which oil is pumped, and the motor having a rotor that is connected to the drill press spindle so to rotate the same.

Abstract: There are described compounds of formula I, ##SPC1##in which X is a saturated hydrocarbon group containing from 2 to 10 carbon atoms inclusive, andR is alkyl, phenyl, or phenyl substituted by one or more halogen or alkyl groups.There are also described processes for making the compounds and haematinic compositions containing them.

Abstract: There are described compounds of formula I, ##SPC1##in which R is alkyl, chlorine, bromine, phenyl, or phenyl substituted by one or more halogen or alkyl groups,One of X and Y is group --CO--, --CHOH-- or --CH.sub.2 -- and the other is an exocyclic carbon-carbon bond linking the ferrocenyl or the R group respectively to the -A- group,A contains 5, 6 or 7 carbon atoms and is an ethylenically unsaturated (the double bond being connected to the carbon atom which is connected to X), unsubstituted (except by X and Y) cyclic hydrocarbon group; or is a saturated cyclic hydrocarbon group substituted by X and Y and, when X is a group --CO-, optionally substituted on the carbon atom to which Y is attached by an -OH group, andX and Y are attached to adjacent carbon atoms on the A group. There are also described processes for the production of compounds of formula I and haematinic compositions containing them.