Abstract: A multiple station CD-ROM testing system includes a conveyance device, a first gripping device, a multiple station testing device having a number of testing stations arranged in a vertically stacked fashion, a second gripping device, a collection device, and a controlling device comprised of a single programmable logic control and a single personal computer. The conveyance device carries the CD-ROMs fed into the system forward. The first gripping device picks up the CD-ROMs on the conveyance device and positions the CD-ROMs into the testing stations of the multiple station testing device to have the CD-ROMs tested therein by means of the controlling device and removes the tested CD-ROMs out of the multiple station testing device and places them back to the conveyance device. The second gripping device picks up the tested CD-ROMs on the conveyance device and transfers the tested CD-ROMs to either a next process if the CD-ROMs pass the test or a flaw product collection device if the CD-ROMs fail the test.

Abstract: A wrist support is detachably connectable to a computer keyboard by means of two connector plates which are received within two cavities formed on the wrist support and movable between a stow position where the connector plates are completely received within the cavities and an extended position where an end of the connector plates is extended out of the wrist support to be pivotally connected to the keyboard. Each of the cavities has two side walls each having two spaced flanges defining therebetween a rail for receiving and guiding a lateral side edge of the plate so as to allow the movement of the plate within the cavity. The plate has first paws which are engageable with ends of the flanges to define the extended position and a second paw engageable with stop blocks provided in the cavity to define the stowed position. The second paw is releasable from the stop blocks to allow the connector plate to move from the stowed position to the extended position.

Abstract: A method for enabling traditional SCSI peripheral equipment to be compatible with a PLUG-AND-PLAY protocol comprising steps of: selecting an SCSI peripheral device as an object and assigning a predetermined identification number to the selected SCSI peripheral device; periodically detecting the signal status on an SCSI bus so as to change a specific signal level to thus communicate with a host computer which determines whether the assigned identification number is permitted; and delaying a time period during the detection of the signal status on the SCSI bus when the permission to assign an identification number has not been determined, and abandoning the assigned identification number when the same identification number has been found to be used by another SCSI peripheral device.

Abstract: A dynamic random access memory (DRAM) classification method is disclosed, including a test/classification apparatus controlled by a test/classification control process. The test/classification apparatus includes a programmable logic control (PLC), test devices, a conveyor device, electromagnetic driver devices, a man-machine interface, sensors and an alarm. The PLC is operated in accordance with the test/classification control process to control the test devices for performing test on DRAMs supplied from at least two supply rails. The electromagnetic driver devices are then used to move the DRAMs so tested to the conveyor device which in turn conveys the DRAMs to a particular collection position in accordance with the characteristic value obtained in the test, which characteristic value being within a particular class of DRAM associated with such a particular collection position, to achieve conveyance and classification of the DRAM.

Abstract: A dynamic random access memory (DRAM) testing apparatus includes a substantially upright support plate on which at least one elongated feeding chute is provided, having a channel co-extensive therewith for receiving and holding therein an IC bar which contains a number of DRAMs to be tested. The DRAMs are movable downward along the channel by means of gravity. A shifting mechanism, which is controlled by a control unit, sequentially transfers the DRAMs from the feeding chute to a testing device defining a holder for receiving the DRAM to carry out the test. The test is conducted by the control unit and the test result is transmitted thereto for classifying the DRAM being tested. The tested DRAM is then forwarded to a movable member to be conveyed thereby to a particular one of a plurality of out-feeding chutes which are associated with different classifications of the DRAMs. The DRAM is then moved from the out-feeding chute to an empty IC bars to be collected therein.

Abstract: A device for lenses of different lengths enables a user to replace different lenses of different lengths by only removing parts of the device without replacing a whole set of the device.

Abstract: A key underboard structure adapted to be used in a computer key board assembly having a plurality of movable keys, includes a lower board and an upper board connected together by means of bayonet engagement to sandwich therebetween a rubber pad with an electrical circuit board having a plurality of contacts corresponding to the keys interposed between the rubber pad the lower board. The rubber pad having a plurality of resilient caps received and extending through holes formed on the upper board and to each contain therein a contact pad. A driving device is constituted by a first member having one end pivoted to the upper board to overlap a second member which has an opposite end movably and rotatably received within an L-shaped member formed on the upper board.

Abstract: An automatic document feeder to be incorporated in a scanner document forwarding mechanism which comprises a reduction gear assembly driven by a motor and having at least one gear and a pair of mated rollers through which a document to be fed by the document feeder travels is disclosed. The document feeder includes a gear train having an input gear mechanically coupled to the gear of the reduction gear assembly of the scanner document forwarding mechanism via two idle gears to be driven thereby and an output gear mechanically coupled to the input gear via a pinion co-axially fixed to the input gear and engaging the output gear. A document driving roller is provided and co-axially fixed to the output gear to be driven thereby for engaging and driving the document to be fed into the scanner document forwarding mechanism. A document guide is provided close to the document driving roller for guiding the document therethrough toward the scanner document forwarding mechanism.

Abstract: A CD-ROM testing apparatus includes a frame on which a working table is supported. A CD-ROM tester is provided on the table, having a test system provided on one side of the tester for engage and actuate the control buttons and knobs of the CD-ROM and a pin card for engaging the back side slot of the CD-ROM provided on the opposite side. A CD-ROM transportation device is provided on the table for sequentially picking up one of a plurality of CD-ROMs carried on a cart and transporting the picked CD-ROM to the tester. A disk shifting device is provided to place a test disk into the CD-ROM located in the tester for test purpose. A personal computer and a programmable logic controller are provided to control the test operation of the testing apparatus and to store the test result.

Abstract: The present invention relates to a keyboard with a universally adjusting apparatus, the keyboard unit is engaged with a universally adjusting apparatus. The universally adjusting apparatus comprises a tray having a plurality of pins to insert into a plurality of slots formed on lower side of the keyboard unit for engagement, and a axle hole formed on lower side of the tray; a bearing block having a axle hole and a plurality of tap holes formed on lower side thereof; a jack post with a nut thereon and a bearing, upper end of the jack post inserting into the axle hole of the tray and lower end of the jack post inserting into the axle hole of the bearing block; a lower base having a plurality of tap holes on upper side thereof; and a plurality of screw studs having threads on both ends, each stud installed between bearing block and lower base and engaged with bearing block and lower base.

Abstract: A track ball base structure comprises a single-piece body having a housing being composed of a plurality of standing plates in the top of the body with extruding portions in the upper end of which to get secure connection to a cover, a central circular recess with an opening bottom to hold a ball therein, a plurality of ball bearing holes evenly distributed around the upper rim of the circular panel in the housing with an inner rectangular plate inside the uppermost of each hole for admitting ball bearings therein and at the same time holding them in place, multiple pairs of locking means and slots in both sides of the body for locking the detecting system as well as fixing the body substantially onto an integrated circuit plate. The present invention is characterized by providing a track ball base structure in a non-assembly manner. Therefore, the number of component parts required for the track ball is reduced and clearly any damage occurring under interconnection for each part can be eliminated.