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7994886 |
Fault tolerant solid state push button control system with built in diagnostic
A contactless switch module, which is actuatable between a closed circuit position and an open circuit position, a plurality of magnetic field sensing sensors, and a plurality of magnets. The...
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7715349 |
Method and apparatus for bit mapping enhanced-dedicated physical control channel (E-DPCCH) information in UMTS wireless communication system
In a 3GPP standards Release 6 UMTS system, in order to avoid searching at NodeB for a maximum E-DPCCH-associated metric at discrete possible valid index values, or over disjoint possible valid...
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7420477 |
Method for an enhanced absolute position sensor system
An absolute position of a rotating axis is sensed at a desired resolution by employing two or more absolute encoders of a resolution that is lower than the desired resolution. A first absolute...
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7400269 |
Coding element with integrated limit switch
An optical encoder. The optical encoder includes a coding element, an emitter, and a detector. The coding element has a track with a track pattern. The track pattern includes a plurality of...
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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...
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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...
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7126108 |
Photodetector array arrangement for optical encoders
An optical encoder utilizes a photodetector array having at least two photodetectors with different surface areas that generate different amounts of photocurrent when they are simultaneously lit by...
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7091883 |
Absolute position encoder
A transducer, a method and a coding pattern for determining a kinematic measurable variable are disclosed. A transducer comprises a first device part which is moveable in or through a corresponding...
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6992602 |
Joystick controller
A joystick controller has a body (10), an operating shaft (12) and a ball-and-socket joint (14) mounting the operating shaft for universal pivotal movement relative to the body (10) about a pivot...
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6890060 |
Recording head driving method, recording head, ink-jet printer
An ink jet printer has a line head having heating elements (121d) for ejecting ink droplets from nozzles, in which the plurality of heating elements (121d) are arrayed in a direction substantially...
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6867412 |
Scale structures and methods usable in an absolute position transducer
An absolute position-sensing device is usable to measure the relative position of two elements. An absolute scale includes an integrated track extending along a measuring axis of the scale. The...
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6812861 |
Method for automatically generating several electrical pulses using numeric default values, in particular for stimulating an incremental encoder
The invention relates to a method for automatically generating several electrical pulses using numeric default values, in particular for simulating an incremental encoder for a sequential, digital...
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6693565 |
Position transducer
There is provided a position transducer (1) capable of accurately detecting an n-bit code by n ABS detectors from one ABS track. When an INC value is under j or over k, signal output from each of...
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6683545 |
Multiturn rotary encoder with detector devices on a shared side of a printed circuit board
In a multiturn rotary encoder, a first code disk is arranged with an input shaft for detecting the angular position of the input shaft within one rotation. To detect the number of rotations of the...
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6542088 |
Multiturn rotary encoder with multiple code carriers coupled by a reduction gear
A multi-turn rotary encoder that includes a first code carrier connected with an input shaft, a scanning device that scans the first code carrier and generates an absolute position of the input...
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6528783 |
Position sensor and circuit for optical encoder
An electronic circuit for measuring the position of a spatially periodic intensity pattern of incident radiation includes an array of detectors (1); two or more correlator units (2, 3) each having...
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6147342 |
Encoding system for determining the position of a cylinder rod along a path of movement
An encoding system for determining the position of a cylinder rod along a path of movement, the encoding system including a sequence of code segments located on the rod along the path of movement,...
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6100822 |
Optical sensing system using multiple detectors at various positions for generating position signals
The present invention discloses an optical sensing system which uses a plurality of detectors installed at various positions next to an optical panel to generate a position signal for indicating...
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5852413 |
Virtual absolute position encoder
A rotary stage (26) is positionable in precise angular increments that are determined by a virtual absolute position encoder disk (106). The angular increments are determined to a 2,400 arc-second...
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5825307 |
Absolute linear encoder and method of production utilizing index and counter channels
An absolute linear encoder includes an index channel and at least two counter channels. The spacing between markings on the index channel is constant, and the spacing between markings on the first...
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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...
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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...
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5225830 |
Combination optical and capacitive absolute position apparatus and method
A combined optical and capacitive absolute positioning encoding system uses a plurality of metallized strips deposited onto a glass scale substrate. A movable transceiver is positioned adjacent to...
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5173693 |
Position encoder using a pseudo-random coding sequence
Two fragments from a single maximal length sequence of length 2(x/2) -1 are interleaved to produce a new sequence of bits. The lengths of the fragments are such that they have no common factors....
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4998105 |
Absolute position encoder
An absolute position encoder comprising a rotary code plate for obtaining sine wave outputs of a plurality of channels each having a different number of cycles per revolution, A/D converters for...
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4947166 |
Single track absolute encoder
An absolute encoder providing a multi-bit output binary code indicative of the position of a rotary or linear scale. The encoder employs a code track, which contains a serial code, and a clock...
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4920341 |
Magnetic rotary encoder device
A magnetic rotary encoder which is reduced in overall size and production cost and wherein little torsional force around an axis of a rotary shaft is applied to a bearing for the rotary shaft from...
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4806860 |
Overlapped magnetoresistive displacement detecting transducers having closely spaced longitudinal centers
A magnetoresistive detection head for detecting relative displacement of a magnetic recording medium relative to the detection head includes two sets of magnetoresistive elements which change their...
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4794251 |
Apparatus for measuring lengths or angles
An apparatus for measuring differences by incrementally counting graduations has additional equidistant graduations as well as a corresponding sensor and evaluation device. The intervals between...
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4774464 |
Magnetic rotary sensor for detecting absolute position of rotating body
A magnetic rotary sensor has a rotary drum carrying thereon magnetically recorded codes representative of discrete positions obtained by dividing one rotation of the drum into a predetermined...
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4772872 |
Alignment system for encoders
An improved encoder alignment system is disclosed which provides an indication of the extent of misalignment and a measure of the rate at which the misalignment may be changing. The invention is...
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4730110 |
Shaft position encoder
A multi-turn shaft position encoder employs a plurality of encoder discs with successive speed reductions of 1:2n and the generation of n+1 bits of binary data representative of the angular...
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4572952 |
Position sensor with moire interpolation
A position sensor has a scale consisting of tracks of indicia in the form of bar patterns acting on a detector having a two-dimensional array of sensitive elements. One track has indicia with a...
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4533902 |
Precision angle transducer using nonprecision rotors
An angle transducer includes input rotor and reference rotor assemblies that are mounted for rotation upon a common shaft and that cooperate with respective moveable input stator and fixed...
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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...
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4445112 |
Positional encoders with plug-together modules
An encoder for producing multidigit code word signals corresponding to the position and movement of a shaft or some other movable member, comprising a housing, a photocell board or some other...
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4443788 |
Optical encoder system
An optical code disc includes a fine track which provides a high resolution signal, at least one V scan natural binary track synchronized to the fine track by lead and lag detectors, and Gray code...
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4442423 |
Optical position sensor including a specially designed encoder plate
An optical position sensor for monitoring displacements of a movable body is disclosed. The sensor includes a light source transmitter, a light sensing receiver, a digital switching device, and a...
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4427970 |
Encoding apparatus
A sequence of or controls pulse-transfer stages supplies or controls pulses between a start limit and a stop limit in the sequence. The device whose position is to be encoded selects and controls a...
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4427972 |
Modular shaft encoder system for non-binary counts
An encoder system which provides non-power of two, unambiguous, even counts, the system having a modular configuration to permit a substantial portion of the system to comprise standardized...
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4343977 |
Electronic controlled heat cooking apparatus
An electronic controlled heat cooking apparatus employs a microprocessor for the purpose of controlling a heating operation. The microprocessor is responsive to a timer time period set by a timer...
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4342025 |
Arrangement for determining the position, especially the angular position, of a movable body
An arrangement for determining the position, especially the angular position, of a movable body comprises a plurality of tracks which are movable with the body past individual detecting locations...
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4274053 |
Magnetic rotary encoder for detection of absolute values of angular displacement
A magnetic rotary encoder for detecting the absolute value of an angular displacement using magneto-resistors is disclosed. A drum, disk or cup-shaped rotary member is attachable to a rotatable...
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4224604 |
Digital optical display with magnetic code plate indexing
A digital optical display device incorporated in a scale including a movable measuring member, a code plate with opaque and transparent areas, a stationary light source irradiating the code plate,...
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4201911 |
Shaft angle digitizer
An analog to digital shaft position digitizer including a pair of driven members where one member with "fine" reference intelligence and increment intelligence thereon is driven at a higher speed...
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4161726 |
Digital joystick control
A digital joystick control includes an elongated shaft member having a spherical ball at one end thereof. First and second socket members are coupled to the joystick to provide a swivel joint...
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4078232 |
Optical analog to digital converter
a Bourdon tube is situated down hole in an oil well or the like, and has attached thereto a coded wheel which rotates an amount determined by the sensed down hole pressure. The wheel has a number...
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4041483 |
Absolute incremental hybrid shaft position encoder
An incremental type shaft position encoder which provides a distinguishable signal at each of a plurality of predetermined shaft rotational positions, and which further provides a unique electrical...
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4031386 |
Optical transducer encoding apparatus
An optical transducer encoding system for use with mechanical counting means such as intermittent movement type counting mechanisms is illustrated using a stationary support means thereof as a...
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4015253 |
Rotary digital channel selection apparatus
A combination control knob and encoder drum unit, which has a number of indexing indentations corresponding to the number of desired stable positions thereof, is sized to pass through an opening in...
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