摘要:
An axisymmetric nozzle for a gas turbine engine has divergent flaps and seals disposed about a central longitudinal axis thereof. The divergent flaps and seals each have an inner surface defining cooling air inlet holes at an upstream portion, cooling air exit holes at a downstream portion, and cooling air channels disposed within the divergent flap and seal, and communicating at a first end with the inlet holes and at a second end with the exit holes for conducting cooling air therethrough. Some of the exit holes of the divergent flap are disposed along lateral edge regions thereof. The divergent seals are interposed between adjacent divergent flaps, and each include lateral edge regions extending laterally beyond the exit holes. The lateral edge regions of each divergent seal have an outer surface overlying at least a portion of the exit holes of an adjacent divergent flap.
摘要:
A nozzle system includes a multiple of circumferentially distributed convergent flaps, divergent flaps and inter-flap seals which circumscribe an engine centerline and define the radial outer boundary of a gas path. Each divergent flap includes a multiple of cooling channels with respective intakes and outlets. As the nozzle transitions between positions, the divergent flap seals move relative a divergent flap longitudinal axis to modulate the cooling airflow which enters the separate intakes.
摘要:
A cooled exhaust duct for use in gas turbine engines is provided. The cooled exhaust duct includes an axial centerline, a circumference, an annulus, and a plurality of radially expandable bands. The annulus is disposed between a first wall and a second wall, and extends along the axial centerline. The first wall is disposed radially inside of the second wall. Each of the plurality of radially expandable bands extends circumferentially within the annulus. The bands are axially spaced apart from one another. Each band includes a first portion attached to the first wall, a second portion attached to the second wall and an intermediate portion connected to the first and second portions. The bands create circumferentially extending compartments that inhibit axial travel of the cooling air within the annulus.
摘要:
The present invention provides a method and apparatus to restore the operating system of a personal internet communicator (PIC) to a “known good” operational state in the event of a catastrophic failure. In an embodiment of the invention, the hard drive of the personal internet communicator is organized in three partitions: 1) a partition for the operating system and related files; 2) a user data partition; and 3) a “restore” partition. The restore partition is hidden by modifying the type of partition that can be detected by the user or any operating system. Upon a catastrophic failure, the system can be returned to an operational state by performing a sector-by-sector restoration to copy an image of the operating system and related system files back to the operating system partition. In various embodiments of the invention, the PIC system state is continuously monitored by a “registry sniffing” routine that maintains a file containing data corresponding to the system state of the PIC. Subsequent to copying the operating system to the OS partition, as discussed above, the system state parameter file is used to modify the operating system to place the PIC in the configuration that existed prior to the catastrophic failure.
摘要:
In a personal Internet communication device, a security key is stored on the master boot record. Any bootable device attempting to write operating system files or software files must have an authorized signature key in order to be eligible to install files on the personal Internet communication device.
摘要:
A foldable viewer is disclosed herein for presenting a graphic scene, message or the like which includes a square blank sheet of pliable material having a viewing area defined on a selected one of its surface for carrying suitable graphic or display subject matter intended to be viewed by the user. In one form, the viewing area is defined by a pair of outlined bands arranged normal to each other having opposite ends of the bands terminating at the respective adjacent edges of the square blank sheet material. Construction of the viewer is accomplished by folding selected and predetermined portions of the blank sheet over upon itself to construct an enclosure with an opening at one end for viewing the interior thereof and for particularly viewing the graphic or message material carried on the interior viewing areas.
摘要:
In a personal Internet communication device, a security key is stored on the master boot record. Any bootable device attempting to write operating system files or software files must have an authorized signature key in order to be eligible to install files on the personal Internet communication device.
摘要:
The present invention provides a method and apparatus to restore the operating system of a personal internet communicator (PIC) to a “known good” operational state in the event of a catastrophic failure. In an embodiment of the invention, the hard drive of the personal internet communicator is organized in three partitions: 1) a partition for the operating system and related files; 2) a user data partition; and 3) a “restore” partition. The restore partition is hidden by modifying the type of partition that can be detected by the user or any operating system. Upon a catastrophic failure, the system can be returned to an operational state by performing a sector-by-sector restoration to copy an image of the operating system and related system files back to the operating system partition. In various embodiments of the invention, the PIC system state is continuously monitored by a “registry sniffing” routine that maintains a file containing data corresponding to the system state of the PIC. Subsequent to copying the operating system to the OS partition, as discussed above, the system state parameter file is used to modify the operating system to place the PIC in the configuration that existed prior to the catastrophic failure.
摘要:
The results of a calibration can be stored in a hard disk drive along with a hard disk condition indication. After the hard disk is re-started, it can be checked to see whether the stored hard disk condition indication is sufficiently close to a current hard disk condition indication. If the condition indication is sufficiently close, the stored calibration results can be used.
摘要:
The results of a calibration can be stored in a hard disk drive along with a hard disk condition indication. After the hard disk is re-started, it can be checked to see whether the stored hard disk condition indication is sufficiently close to a current hard disk condition indication. If the condition indication is sufficiently close, the stored calibration results can be used.