| Patent Number |
Title Of Patent |
Date Issued |
| RE34095 |
Digitizer stylus with pressure transducer |
October 13, 1992 |
| A stylus switch is activated automatically when the tip of the stylus is pressed against a digitizer tablet with sufficent force. The pressure switch inlcudes a transducer in the form of an ink layer having electrical resistance which varies as a function of the pressure applied thereon. |
| D358601 |
Ribbon cassette for a printer |
May 23, 1995 |
|
| D327476 |
Digitizing stylus |
June 30, 1992 |
|
| D322250 |
Digitizing stylus |
December 10, 1991 |
|
| D320787 |
Digitizing stylus |
October 15, 1991 |
|
| D284084 |
Digitizer |
June 3, 1986 |
|
| D280725 |
Cursor |
September 24, 1985 |
|
| 5581052 |
Pressure sensitive stylus having resiliently compressible tip element |
December 3, 1996 |
| A stylus for use with a digitizer tablet has a tip element that includes a front portion with a tip for engaging the surface of the tablet, and a back portion of the tip element within the stylus housing. The back portion of the tip element is adapted to apply pressure to a pressure |
| 5416280 |
Digitizer tablet using relative phase detection |
May 16, 1995 |
| In a digitizer and method for laying out and using the tablet of the digitizer, wherein the tablet provides unambiguous binary code outputs. The digitizer may employe a cordless transducer and signal processing circuitry providing relative phase detection for determining coarse locat |
| 5405205 |
Sheet medium transport system, particularly for printers and plotters |
April 11, 1995 |
| The invention disclosed herein provides a method and apparatus for counteracting the effects of a localized drag on a sheet medium as it is being moved by a drive system, for example, in a printer or plotter to prevent misregistration of the sheet medium with the X-axis drive system |
| 5383733 |
Ribbon cassette for a printer |
January 24, 1995 |
| A cassette for ribbon for a printer, particularly a thermal printer, is disclosed. The cassette is configured to be stably mounted to a print carriage of a thermal printer, or to a storage turret mounted to the printer for storing a number of cassettes, and to be transferred by a pas |
| 5369227 |
Stylus switch status determination in a digitizer tablet having a cordless stylus |
November 29, 1994 |
| A digitizer tablet with a cordless transducer which is capable of providing to the tablet information relating not only to the position of the pointing device but also with respect to the status of any button switches on the transducer. This is obtained by providing a plurality of os |
| 5333005 |
Apparatus for raising and lowering plotter marking devices |
July 26, 1994 |
| Apparatus especially X-Y plotters having a marking device for marking a surface. A support is provided for supporting the marking device. The support is movable along an axis of the housing while the marking device can be selectively raised and lowered relative to the surface. The raisin |
| 5303624 |
Apparatus for cutting sheet media |
April 19, 1994 |
| Motor-driven cutting apparatus for cutting sheet media are disclosed, particularly for use with plotter and printer apparatus. The cutting apparatus of one embodiment comprises two cutting members in which at least one of the cutting members is moved both angularly and linearly, e.g. |
| 5267802 |
Ribbon cassette storage and transfer apparatus for a printer |
December 7, 1993 |
| Apparatus is disclosed for use with printers (or plotters) for storing and transferring ink-containing ribbon cassettes between a print head and a storage location. The printers (or plotters) are of the type which include a print head that is not as wide as the width of the medium to be |
| 5267401 |
Method and apparatus for gauging reel diameters in a reel-to-reel sheet material transport syste |
December 7, 1993 |
| Method and apparatus are disclosed for determining the diameter of sheet material wound on a reel, and for setting the tension on sheet material as it is wound on the reel. According to one embodiment, the diameter of a take-up reel including sheet material wound thereon is determined fr |
| 5229551 |
Hysteresis compensation for a digitizer tablet |
July 20, 1993 |
| A digitizer tablet providing hysteresis compensation in which the X and Y coordinates of a pointing device are measured at different times. In order to enable the tablet to report X and Y coordinates that when displayed will more accurately reflect the pointing device movements, a correc |
| 5214448 |
Belt-drive tensioning system which uses a pivoting member |
May 25, 1993 |
| A belt drive tensioning system for a motor drive positioning system, especially for X-Y digital plotters. The tensioning system employs spring-loading involving pivoting motion of a motor-mounted plate relative to a fixed plate to accurately preset and maintain constant the desired b |
| 5210380 |
Digitizer with serpentine-type conductor grid having uniform conductor repeat increments |
May 11, 1993 |
| Disclosed herein are position determining apparatus and conductor structures or grids therefor. The conductor structure for each axis includes a number of conductors which are run in a serpentine-type path each with uniform repeat increment. The repeat increment, which is the spacing |
| 5194699 |
Digitizer tablet with fixed incremented grid portions |
March 16, 1993 |
| An electromagnetic digitizer tablet comprising an array of conductors having plural, spaced, similar active portions regularly and uniformly distributed throughout the active tablet region, together with additional structure to distinguish pointing device positions over the similar activ |
| 5191480 |
Optical accessory for digitizer cursors |
March 2, 1993 |
| An accessory for improving the accuracy, and/or facilitating the use, and/or improving aesthetics and/or ergonomics of digitizer cursors is disclosed. The accessory mounts an optical element to the position-sighting aperture on the cursor. In all embodiments, the accessory or accesso |
| 5179254 |
Dynamic adjustment of filter weights for digital tablets |
January 12, 1993 |
| A digitizer table which employs low pass filtering of raw coordinate data to reduce noise and jitter. A weighted filtering is employed, in which the new position data is averaged with a previous average or previous position data before being reported. The weighting factor applied to the |
| 5173793 |
Liquid crystal shutter for backlit digitizer |
December 22, 1992 |
| A digitizer system comprises a source of a light for producing an image, a shutter, and a transparent or translucent digitizer tablet. The source is positioned to direct the image to the tablet via the shutter. The shutter comprises a liquid crystal layer and transparent planar conductor |
| 5157227 |
Digitizer tablet with regional error correction |
October 20, 1992 |
| A digitizer tablet exhibiting improved regional error correction comprises evaluation of two linear equations to correct the generated raw coordinates. The equations contain certain constants unique to tablet regions exhibiting similar error patterns. These constants are empirically |
| 5153570 |
Magnification assembly for digitizer cursor |
October 6, 1992 |
| An assembly utilizable with a digitizer cursor for increasing the accuracy of position determinations made by the operator is disclosed. The assembly comprises in combination a magnifying lens and a connector for attaching the magnifying lens to the cursor in a region about the cross-hai |
| 5153386 |
Digitizer tablet with illuminable working surface |
October 6, 1992 |
| A digitizer tablet is provided in which the working surface is illuminated by a light source which includes optical structure located over the grid or electrode array of the position determining structure of the digitizer to provide a surface-lit tablet, or beneath the grid or electrode |
| 5113042 |
Digitizer tablet with reduced radiation susceptibility |
May 12, 1992 |
| A digitizer tablet capable of reduced coordinate wobble due to beat interference between an induced display scan rate and the tablet scan rate by introducing a controlled delay to change the time between successive samples to increase the beat frequency to the point where it can be e |
| 5111005 |
Graphics tablet with N-dimensional capability |
May 5, 1992 |
| A digitizer tablet and puck(cursor) for use therewith, characterized that in one aspect the puck is provided with at least one additional control which will provide the user with the ability to control at least one N-dimensional signal in addition to the normal X-Y coordinate data. In |
| 5109141 |
Digitizer stylus with z-axis side control |
April 28, 1992 |
| Stylus for digitizer tablet, with the stylus provided with a finger-actuated side control for controlling the magnitude of a Z-axis signal. The side control remains in the position placed by the user, and preferably comprises a slide switch mounted on the side of the stylus housing. |
| 5101487 |
Method for retrieving compressed data from a memory storing a look-up table |
March 31, 1992 |
| A method for storing a k-bit output value for each of a plurality of m-bit input values in a memory having an n-bit word stored at each of 2.sup.n n-bit addresses, wherein m, n and k are positive integers, m>n>k and m-n.gtoreq.k, the method comprising the steps of storing a first k |
| 5066833 |
Low power sensing apparatus for digitizer tablets |
November 19, 1991 |
| A digitizer tablet consuming less power than is required of current tablets comprises short duration fast rise time energizing pulses, and a resonant circuit in the induced signal detector tuned to the frequency of the pulse repetition rate or preferably a higher frequency. Peak detector |
| 5065145 |
Method and apparatus for producing signals corresponding to the position of a cursor |
November 12, 1991 |
| A method and apparatus for indicating the position of a cursor on a surface in first and second different directions. The cursor is mounted on a member such as a gantry, and the gantry is guided for movement in the first direction on a carriage. The carriage is mounted for movement in th |
| 5061828 |
Digitizer stylus with Z-axis side pressure control |
October 29, 1991 |
| A digitizer stylus with Z-axis side pressure control, comprising a nib front end resiliently mounted on the stylus housing and cooperating with a Hall-effect transducer such that side pressure on the nib, used like a calligraphic pen or brush, modifies the Hall-effect output, which can b |
| 5055831 |
Cursor for digitizer tablet |
October 8, 1991 |
| A novel cursor construction for a digitizer tablet, wherein the cursor coil is wound on a one-sided bobbin which is then seated in a blind hole of a transparent base, with a crosshair molded into the base and aligned with the coil. |
| 5051545 |
Digitizer with serpentine conductor grid having non-uniform repeat increment |
September 24, 1991 |
| Disclosed herein are position determining apparatus and conductor structures or grids therefor. The conductor structure for each axis includes a number of conductors, at least one of which is run in a serpentine path with a non-uniform repeat increment. The repeat increment, which is |
| 5028744 |
Digitizer with illuminable working surface |
July 2, 1991 |
| Digitizer tablet and digitizer tablet structure having an illuminable working surface are disclosed. A space between a top translucent layer having the working surface and a source of light is provided so as to eliminate or minimize undesirable lighting effects at the working surface. |
| 5014044 |
Magnification assembly for digitizer cursor |
May 7, 1991 |
| An assembly utilizable with a digitizer cursor for increasing the accuracy of position determinations, wherein the cursor has cross-hairs for enabling the positioning of the cursor at a desired point on a digitizing surface, comprises in combination a magnifying lens and a connector for |
| 5004872 |
Digitizer tablet with pressure stylus |
April 2, 1991 |
| A digitizer tablet using a pressure-sensitive pointing device preferably containing a linear transducer is provided with the means to convert linear pressure signals to logarithmically-related output counts. The conversion means is programmable to allow outputting of a logarithmically |
| 5004871 |
Digitizer stylus having side switch |
April 2, 1991 |
| A stylus having a pressure sensitive side switch for use with digitizer apparatus is disclosed. The pressure sensitive side switch is activated by the application of pressure thereto substantially normal to the axis of the stylus by the finger of a user. In the illustrated embodiments, t |
| 5001306 |
Distributed optical fiber device for digitizer tablet |
March 19, 1991 |
| An optical device comprising a sheet of optical fibers having different lengths so that the fiber ends are distributed uniformly over a given area. The device is mounted in a digitizer tablet above or below its electrode array. When light is pumped into the free fiber ends, a pattern |
| 4999462 |
Position determining and digitizing method and device |
March 12, 1991 |
| A coordinate determining system, tablet, and method wherein the tablet is formed of a sequence of triangular electrodes extending in a first direction, with alternate electrodes having their apexes extending in opposite directions perpendicular to the first direction, and the bases of |
| 4996393 |
Digitizer tablet with split-current conductor array |
February 26, 1991 |
| An electromagnetic digitizer system employing an interleaved array of individual conductors each in a W configuration bent into plural sections to define plural parallel portions distributed in different segments of a tablet such that each section comprises a center conductor portion |
| 4992630 |
Digitizer tablet with user customization of stylus proximity and pressure |
February 12, 1991 |
| A digitizer tablet provided with menus over the marginal areas in the non-linear boundaries of the regular electrode array. Coordinate signals from the menu areas are processed to vary a parameter of the processing circuitry for the coordinate value outputs. |
| 4990726 |
Digitized controller for position locator |
February 5, 1991 |
| A digitizer tablet uses sequenced wire addressing to derive time-related voltages correlated to the location of the addressed wires. The voltages are digitized, and an algorithm followed to determine by interpolation the exact position of a pointing device over the addressed wires. The |
| 4988836 |
Digitizer tablet with integral storage |
January 29, 1991 |
| A digitizer tablet providing secure storage therein for the cables, clips, stylus, and cursor is disclosed. A recess molded in the bottom surface of the tablet is partially covered by a plate so that a rectangular pocket is formed. Two channels are also molded in the bottom surface of th |
| 4985602 |
Self-locking support for digitizer cover |
January 15, 1991 |
| A digitizer tablet is disclosed having a movable cover and a support which automatically stably holds the cover open when the cover is opened. The digitizer tablet comprises a base structure, a cover pivotably connected thereto and a support coupled to the cover and to the base structure |
| 4952757 |
Low-power electromagnetic digitizer tablet |
August 28, 1990 |
| A low-power electromagnetic digitizer table employing triangular-shaped electrodes arrayed in a single plane. A pointing device coil when energized induces signal voltages in the electrodes underneath. The electrodes are scanned in timed relation, and the induced voltages digitized a |
| 4943689 |
Backlit digitizer tablet |
July 24, 1990 |
| A backlit digitizer tablet providing uniform illumination of the working surface, comprising biaxial fluorescent lamps supplying wide-area light emission under a sandwich top construction including an apertured shield electrode, a first clear spacer, an electrode array, a second clear |
| 4936683 |
Optical tablet construction |
June 26, 1990 |
| An optical digitizer or tablet employing a linear image sensor behind a microlouver strip and extending along a coordinate axis of a coordinate axes plane. In one embodiment, a non-directional light source floods the plane, and a cursor is provided with a reflector that reflects incident |
| 4857903 |
Electro-optical mouse with improved resolution for compensation of optical distortion |
August 15, 1989 |
| An electro-optical mouse has a four-quadrant photodetector, each quadrant producing a voltage proportional to the amount of light impinging thereon. The mouse slides over a surface having optically contrasting, i.e. reflecting and nonreflecting, indicia thereon. The position of the mouse |
