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| Number | Title | Issue Date |
| 7388528 | Coding method and device for determining absolute angular position Method for coding at least one datum using three digital signals A, B, C delivered on respectively one channel, in which the third signal C is delivered by a combination of the first two signals A, B in order to form m binary triplets, where m | 06/17/2008 |
| 7365654 | Absolute angle detection apparatus In an absolute angle detection apparatus, sectors are obtained by dividing 360° by an even number, each sector having combinations of first and second code lines. The first code lines are Gray codes including third code lines that do not appear the same even when a... | 04/29/2008 |
| 7355165 | Optical encoder and method for using same An optical encoder, a system and a method for outputting a signal are provided. The optical encoder and the system have a shaft extending from an interior of a housing. A circuit board having a light emitting element and a light detector is connected to the housing.... | 04/08/2008 |
| 7352293 | Multi-mode encoder output generator Various apparatus and methods of a multi-mode encoder output generator are disclosed. ... | 04/01/2008 |
| 7348545 | System and method for optical encoding on two opposed surfaces of a pattern medium An optical encoder system is disclosed with a single pattern medium having a first coded pattern disposed on the first side, a second coded pattern disposed on the second side, a first optical encoder disposed toward the first side, and a second optical encoder disp... | 03/25/2008 |
| 7345597 | Process to determine the absolute angular position of a motor vehicle steering wheel A method for determining absolute value of a rotational angle includes imaging a segment of a code track onto a sensor such that the sensor generates a corresponding output signal. The track includes a code in the form of a light and dark transition pattern over an ... | 03/18/2008 |
| 7289041 | Absolute position chain encoder An absolute position encoder for identifying which of a plurality of loci a moveable member occupies comprises a plurality of data tracks in which binary data is encoded to form a series of n-bit words, each of the plurality of loci being associated with one of the ... | 10/30/2007 |
| 7256713 | Absolute angle detecting device An absolute angle detecting device is provided. The absolute angle detecting device is composed of a first detecting element group that outputs a Gray code string for angle detection that detects a rotating angle in one sector of the multi-rotation body at required ... | 08/14/2007 |
| 7167194 | Printing a code on a product A method for printing is described. The method includes providing a printing system for printing a code on a product moving in a direction. The code is constructed from a plurality of pixels in a first data set indicating the positions of the pixels and generates a ... | 01/23/2007 |
| 7046172 | Dual optical angular encoder To monitor the reliability of the information provided by a dual optical angular encoder, comprising two pairs of cells for detecting marks borne by a disc, at a given instant, the sequences of at least four successive states taken by the two groups of cells before ... | 05/16/2006 |
| 7031031 | Position measuring system A method for the functional control of a position measuring system that includes placing a scanning unit at a position with respect to a graduation, generating a first scanning signal and a second scanning signal during the displacing, forming a first measured posit... | 04/18/2006 |
| 6970108 | Encoder interface An encoder interface device that permits automatic discovery of an unknown encoder that is physically connected to the interface device, so as to enable correct operation. The device permits discovery of characteristics of an unknown encoder including the primary qu... | 11/29/2005 |
| 6966118 | Absolute angle detecting device The present invention provides an absolute angle detecting device capable of achieving a resolution of 1.5 degrees or less by which 360 degrees can be divided without a remainder, using two code pattern rows and eight detecting elements. The absolute angle detecting... | 11/22/2005 |
| 6946650 | Sensor The relative position of two members is determined based upon a detected relative intensities of first and second colors of light. The intensity balance associated with relative occlusion of first and second color filter portions on one member by a mask on the other... | 09/20/2005 |
| 6768426 | Position detection apparatus A position detection apparatus including a detection unit for an absolute track including a plural number of ABS heads for absolute track, in which the separation between neighboring heads is broadened. The n ABS heads 10-1 to 10-n are ar... | 07/27/2004 |
| 6552717 | OHAI technology user interface A variety of methods and systems for presenting and delivering user application input choices. One-handed or vocal user input provides chords or syllables. The invention includes systems and methods for presenting user application input choices, chord or ... | 04/22/2003 |
| 6330522 | Rotational angle detector and method A rotor is fixed to a steering shaft to rotate with the steering shaft, and outer and inner slits are formed along different circles on the rotor. Outer and inner sensors, which detect the presence or absence of the slits, generate reflective codes and ar... | 12/11/2001 |
| 6130425 | Rotating detecting device of multi-rotation body Disclosed is a rotation detecting device of a multi-rotation body, in which a code plate of an incremental encoder is fixedly mounted to a first rotor which is rotatably supported on a housing; a small-diameter portion and a large-diameter portion are for... | 10/10/2000 |
| 6127948 | Bidirectional synthesis of pseudorandom sequences for arbitrary encoding resolutions A pseudorandom sequence is bidirectionally synthesized for any arbitrary encoding resolution. The synthesis of such a pseudorandom sequence includes providing within the sequence a conventionally disallowed code (e.g., an all zeroes or an all ones code) a... | 10/03/2000 |
| 6025785 | Multiple code formats in a single garage door opener including at least one fixed code format and at least one rolling code format A barrier movement actuating receiver learns and responds to fixed code type access codes and rolling code type access code wherein the actuating receiver includes a programmer for programming the actuating receiver to accept fixed or rolling type access ... | 02/15/2000 |
| 5774068 | Absolute signal detecting method and absolute encoder A code plate has an m-bit signal track read out in parallel for providing the starting position of an AC servo motor for commencing rotation when power is first turned ON. An n-bit signal track accompanied by an incremental signal track is provided on the... | 06/30/1998 |
| 5650779 | Position encoder A sensor failure detection circuit for a position encoder, the sensor failure detection circuit receiving from a first set of at least one position sensor position signals which change state at a high resolution and from a second set of at least one posit... | 07/22/1997 |
| 5565864 | Absolute encoder An encoder includes a code plate, a detector, a transformer, and first and second calculators. The code plate is formed with an absolute pattern including a plurality of bit patterns, each bit pattern formed by a predetermined number of bits and represent... | 10/15/1996 |
| 5408286 | Signal generating device with selective pattern reading A signal generating device has a pattern carrying unit with separated or connected patterns. Contact members of a signal reader make contact with the patterns and one of the patterns is selected for reading by a selector.... | 04/18/1995 |
| 5178063 | Method and apparatus for automatic numbering of forms on a rotary printing press Computer controlled numbering of consecutive business forms is provided for both computer controlled presses and in the form of a retrofit unit for conventional rotary presses. The retrofit unit includes a disk provided with radially oriented metallic str... | 01/12/1993 |
| 4970387 | Position transducer having absolute position compensation A scale (110) having apertures representing a binary code (113A-113E) and other apertures (115, 116, 111) generating two compensation signals and moire fringes in cooperation with a mask (105) having tilted apertures (112A) is scanned by a light beam (101... | 11/13/1990 |
| 4914437 | Encoder for measuring both incremental and absolute positions of moving elements An optical encoding system for determing the absolute and the incremental positions of a movable member relative to a stationary member. For example, three stationary light sources may be supported by the stationary member for emitting three narrow light ... | 04/03/1990 |
| 4901073 | Encoder for measuring the absolute position of moving elements An optical encoding system for determining the absolute position of a movable member relative to a stationary member. For example, a bar-code scanner may be supported by a stationary member for scanning bar-code symbols in its field of view. An encoding b... | 02/13/1990 |
| 4736187 | Encoder for measuring both incremental and absolute positions of moving elements An optical encoding system for determining the absolute and the incremental positions of a movable member relative to a stationary member. For example, three stationary light sources may be supported by the stationary member for emitting three narrow ligh... | 04/05/1988 |
| 4621256 | Apparatus for measuring rate of angular displacement A shaft angle encoder comprises a code disc (21) mountable coaxially upon a rotary shaft (20) whose angular position is to be continuously measured. Coarse-bit angular position data are encoded digitally in Gray code by a pattern of opaque and transparent... | 11/04/1986 |
| 4524347 | Position encoder A position measuring device includes a conventional encoder, a scale member and an index member together arranged to provide two periodic waveforms of the same frequency and in quadrature with one another. Errors in the waveforms are corrected, and the co... | 06/18/1985 |
| 4311987 | Validity check process for data supplied by digital displacement detectors and detectors using this process A checking process for data supplied by a digital detector with coded tracks. This detector is designed to supply two words of the same format: one word A in Gray code and one word D in Gray code complemented and shifted back by a half coding point. The a... | 01/19/1982 |
| 3935568 | Universal analog-to-digital converter using the same information disc for different output codes A device for converting mechanical positions into an electric signal output. The device includes a position indicator track having a plurality of segments representing mechanical positions. A signal means is coupled to the elements whose mechanical positi... | 01/27/1976 |
