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公开(公告)号：AU2003254102A8
公开(公告)日：2004-05-04
申请号：AU2003254102
申请日：2003-07-22
Applicant: IBM
Inventor： KARIDIS JOHN P , HENDRIKS FERDINAND
Abstract: A passive optical marker for use in accordance with an electronic whiteboard system that selectively allows a reflector associated with the optical marker to be exposed to a light emitting source. Thus, the optical marker of the present invention selectively provides information pertaining to the location of the optical marker and pen-up/pen-down states.
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Patent Agency Ranking
公开(公告)号：AU2003254102A1
公开(公告)日：2004-05-04
申请号：AU2003254102
申请日：2003-07-22
Applicant: IBM
Inventor： HENDRIKS FERDINAND , KARIDIS JOHN P
Abstract: A passive optical marker for use in accordance with an electronic whiteboard system that selectively allows a reflector associated with the optical marker to be exposed to a light emitting source. Thus, the optical marker of the present invention selectively provides information pertaining to the location of the optical marker and pen-up/pen-down states.
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公开(公告)号：SG42812A1
公开(公告)日：1997-10-17
申请号：SG1995002165
申请日：1994-06-13
Applicant: IBM
Inventor： HENDRIKS FERDINAND , KHANNA VIJAYESHWAR D , CRONE ROBERT MICHAEL
Abstract: An air bearing slider has both front and rear pads extending from a generally planar body, both pads having faces opposed to a recording medium and separated by a gap that is substantially in excess of any fly height of the slider. Both surfaces exhibit extremely small taper angles that enable "inlet throttling" of air beneath the slider. Such inlet throttling provides the slider with a fly height that is substantially independent of relative speed changes between the slider and a recording medium. A preferred embodiment includes front and rear pads that are convex in the direction of movement of the recording medium e.g. are "forward swept". Such convexity enables substantial resistance to fly height changes in response to skew alteration.
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公开(公告)号：DE3475364D1
公开(公告)日：1988-12-29
申请号：DE3475364
申请日：1984-08-29
Applicant: IBM
Inventor： HENDRIKS FERDINAND , TAYLOR RUSSELL HIGHSMITH
IPC: G01B21/00 , B25J9/10 , B25J9/14 , B25J19/02 , G01B11/00 , G01B11/24 , G01B21/20 , G05D3/20 , H01L21/68 , B25J13/08
Abstract: This precision probe uses optical feedback in the X and Y dimensions to locate a microprobe (3) in the airspace over a test pad (1-2), and uses pressure feedback in the Z dimension to control Z approach and penetration.The precision probe inspects a target (1-1) by coarse positioning a guided microprobe to make contact at a selected probe pad (1-2). Guidance is optical, by light reflected, from a target by a dual mirror focusing system of concave mirror (4) and flat mirror (5), to a transducer. Up and down Z positioning of the microprobe is carried out by a shaft positioned by an air diaphragm (9) which is driven to the target by applied air pressure delivered via an air tube (10), providing the desired penetration of microprobe to microtarget. The probe is retracted by atmospheric pressure.In operation, the microprobe is coarsely positioned by the computer (2) and the coarse positioner in the air space above the X-Y coordinates for the probe pad. but tolerances may be such that the microprobe is not precisely positioned within the airspace periphery of the probe pad. Assuming that the precision required is greater than the tolerances available or desired, fine positioning is required. Fine positioning with guidance sensing, using computer preparation of fine positioning control signals and control signal responsive mechanisms built into the microprobe, accomplishes the fine positioning. Precision X-Y positioning is carried out by the voice coil microactuators (11,13), respectively in response to computer control signals delivered via the control cable (14).
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公开(公告)号：CA1150341A
公开(公告)日：1983-07-19
申请号：CA360012
申请日：1980-09-10
Applicant: IBM
Inventor： HENDRIKS FERDINAND
Abstract: FLUID PRESSURE AND VELOCITY SENSING APPARATUS Apparatus for measuring fluid pressure and velocity, and in particular for maintaining an aspirator air velocity constant under varying atmospheric conditions. A precisely controlled air velocity is provided by a reference air source whose frequency is derived from a crystal oscillator. The total air pressure from the aspirator wind tunnel is compared with the total air pressure from the reference air source using a matched thermistor pair technique to convert the pressure difference into an electrical error signal which is used to control the main air source for the aspirator wind tunnel such that the error signal is maintained at zero, thereby maintaining the air velocity in the aspirator constant.
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公开(公告)号：CA1070749A
公开(公告)日：1980-01-29
申请号：CA293420
申请日：1977-12-19
Applicant: IBM
Inventor： GIORDANO FRANCIS P , HENDRIKS FERDINAND
Abstract: AXIAL DROPLET ASPIRATOR There is described a droplet aspirator for an ink jet printer. The aspirator includes a housing having a tunnel therein, which is spaced from an ink jet nozzle which emits an ink jet stream which passes through the tunnel. A gas stream is also directed through the tunnel at substantially the same velocity as the ink jet stream for reducing the aerodynamic effects on adjacent ink droplets. The tunnels cross-sectional area is substantially constant from one plane to the next when measured in any given plane transverse to the longitudinal axis, for maintaining the velocity of the gas stream constant. The tunnel has a circular crosssection when used in a nozzle per spot system, and when used in an analog deflected system, has an entrance of one geometry, with the tunnel changing in geometry along its longitudinal axis to a different geometry at its exit. Preferably, in the analog deflected system, the entrance geometry is circular and the exit geometry is elliptical or rectangular.
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