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| Number | Title | Issue Date |
| 8154427 | Multiturn rotary encoder and method of operating a multiturn rotary encoder A multiturn rotary encoder includes: a single-turn unit, including a code carrier and a single-turn evaluation unit for processing single-turn position signals to form a single-turn code word; a first multiturn unit, including at least one first multiturn code carri... | 04/10/2012 |
| 7292028 | Apparatus for sensing the absolute-value angle of a shaft An apparatus serves to sense the absolute value of the rotational position of a shaft (14). The apparatus has a first single-turn rotary encoder (30) that is arranged at one end (20) of the shaft (14) and is arranged to sense the latter's... | 11/06/2007 |
| 7193533 | Operating element with settable selectivity An operating element with a settable operating characteristic for generating numerical control values A converts position signals P corresponding to the position of a linear sensor element into control values A using an assignment characteristic curve. Different ass... | 03/20/2007 |
| 7142132 | Methods and systems for multi-state switching using at least one ternary input and at least one discrete input Systems, methods and devices are described for placing a controlled device into a desired operating state in response to the position of a multi-position actuator. Two or more switch contacts provide input signals representative of the position of the actuator. Cont... | 11/28/2006 |
| 7091884 | Analog position encoder A position-measuring circuit is described for use with an analog position encoder of the kind comprising a code member and at least two sensors for sensing successive marks on the code member during relative movement between the code member and sensors, the sensors ... | 08/15/2006 |
| 7060969 | Rotating machine having rotation sensors Three rotation sensors circumferentially arranged at 90 degree intervals in a disk code wheel attached to a motor's output shaft respectively output a signal corresponding the rotational speed of the wheel. An error component of one period (one-periodic component) o... | 06/13/2006 |
| 7030368 | Method for operating a position measuring device and position measuring device suitable therefor A position measuring operation system for determining positions of a first object and a second object, which can be moved in relation to the first object, including a position measuring system having a light source that is operated in a pulsed manner and an evaluati... | 04/18/2006 |
| 7023503 | Image sensor with photosensitive thin film transistors An image sensor array includes image sensors having photo TFTs to generate photocurrent in response to received images. The photo TFTs each have their respective gate electrodes shorted to source electrodes to increase generated photocurrent. Storage capacitors are ... | 04/04/2006 |
| 7017274 | Multi-turn angle transducer A multiturn angle measuring device (1) with a first dimensional standard (9) that is non-rotatably connected to an input shaft (2) and which is sampled by a first scanning unit (10) to determine the angular position of the input shaft. Ad... | 03/28/2006 |
| 6972404 | Optical control device having a controller that controls track movement of a driven member through a drive unit with reflecting regions An optical control device includes a drive member formed with a plurality of reflecting regions along a second track and movable along the second track for driving a driven member to move along a first track. An optical unit emits a light beam that is incident upon ... | 12/06/2005 |
| 6956198 | Rapid high resolution position sensor for auto steering A position sensor for determining the angular position of a steering wheel. The shaft of the steering wheel is connected to a code disk and turn ring of the sensor so that when steering wheel is rotated, the coded disk and turn ring are also rotated. The code disk i... | 10/18/2005 |
| 6925169 | Information entry device The objective of this invention is to protect the information entry such as a PIN from theft by observation of the finger movement based on the conventional fixed arrangement of entry keys. The present invention is an information entry device including: keys ... | 08/02/2005 |
| 6914543 | Method for initializing position with an encoder A method for detecting an absolute rotational position of an electromechanical device or the at least one component thereof comprising determining a first absolute position of the electromechanical device or the at least one component thereof based on a commutation ... | 07/05/2005 |
| 6903661 | Photoconductive encoder wheel A photoconductive encoder structure has a grating cogwheel made of light-pervious materials, a sensor and two luminescence elements perpendicular to each other. An incident surface of the grating cogwheel surrounds a protruding surface, and protruding wheel parts di... | 06/07/2005 |
| 6765501 | High performance rotary axis A high performance rotary axis. An upper and lower unit are coupled together by a pair of bearings to permit relative rotation between the units. The bearings are biased relative to others along a link to reduce play between the bearings. A processor and sensor prov... | 07/20/2004 |
| 6683543 | Absolute encoder based on an incremental encoder An encoder that includes a sensing device that senses encoding marks on a sensing surface that also includes one or more reference marks. The sensing device generates first and second encoder signals when the encoding marks pass the sensing device. The en... | 01/27/2004 |
| 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 shaft within one revolution, and a digital code word is prese... | 04/01/2003 |
| 6525675 | Position encoder for determining the angle or position and the total angle on distance moved An angular position/position encoder is provided for determining the position of a moving part through evaluation of the direction-specific changes in the measured values recorded and for serial output in binary form of the position determined in this way... | 02/25/2003 |
| 6469642 | Method, selector switch and selector device for securely sensing a selector switch position A method, a selector switch and selector device, is provided for secure position detection of a selector switch, which can be operated in at least two positions, particularly in a vehicle. In the method, a code word composed of a data part and a test part... | 10/22/2002 |
| 6351224 | Encoding device An encoding device in which signals generated thereof can be efficiently propagated comprises a housing and a tracing ball rotatably arranged on said housing. An encoding assembly including a pair of encoding wheels is mechanically arranged adjacent to sa... | 02/26/2002 |
| 6226569 | Absolute value transmitter acting as a rotation transmitter for registration of a steering angle of a motor vehicle A rotary transmitter for registration of the steering angle of a motor vehicle, with a transmitter component (49) on which is provided a coding (51) of a predetermined number n of locally sequentially digital words (Wi) with a width of m bits (... | 05/01/2001 |
| 6144369 | Signal processing system When the ball of a mouse is rotated, an up/down counter outputs a count N according to the direction of rotation and the amount of rotation. A controller compresses the count N to seven-bit data according to a conversion table. The controller also attache... | 11/07/2000 |
| 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 and second channels is predetermined so that the positions... | 10/20/1998 |
| 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 |
| 5457371 | Binary locally-initializing incremental encoder A binary locally-initializing incremental position encoder (112) for determining the position of an object, i.e. a robot arm (102). The inventive position encoder (112) is adapted to be coupled to the object (102) and includes first, second, third and fou... | 10/10/1995 |
| 5274203 | "Smart" position transducer system for elevators An elevator system (FIG. 1) employing a microprocessor-based group controller (FIG. 2 ) communicating with the cars (3, 4) using car position and velocity information provided by a "smart" primary position transducer (SPPT) system to control the motion of... | 12/28/1993 |
| 5049879 | Position encoder utilizer special gray code A position encoder includes a plurality of encoded elements or disks, each of which has indicia representative of a bit of a five bit digital word of a Gray code. Each disk is mechanically coupled to a lever or movable member. A sensor is positioned adjac... | 09/17/1991 |
| 5038243 | Local initialization for incremental encoder A position encoder for monitoring the position of a robot arm includes an incremental encoder section which can be initialized locally by an initialization section. The initialization section comprises three engaged encoder gears with relative prime numbe... | 08/06/1991 |
| 4933673 | Encoder An encoder for detecting the state of movement of a scale having a plurality of tracks consisting of arranged predetermined codes comprises first detecting device for reading the codes of the plurality of tracks and detecting data comprising a row of the ... | 06/12/1990 |
| 4922247 | Encoder mount An encoder is rigidly mounted to a component shaft and allowed to float with it, saving the expense of a flexible coupling and improving accuracy. An easily assembled detent prevents rotation of the encoder housing with the shaft.... | 05/01/1990 |
| 4901072 | Position detector utilizing gray code format A position detector is provided with an encoded element having indicia representative of a bit pattern of a pair of bits of a Gray code and a pair of sensors responsive to this indicia. The encoded element is capable of being mechanically coupled to a mov... | 02/13/1990 |
| 4864302 | Data entry systems for converting an analog instrument to machine-readability Bar codes are shown for measurement of volumes of liquids, e.g., the amount of milk collected in a dairy milking operation, and correlation therewith to identification of the source of the liquid, such as a cow. In the preferred embodiment, infrared or la... | 09/05/1989 |
| 4788422 | High resolution rotary encoder having appositely rotating disks A rotary encoder having first and second slit disks are disposed between a light emitting diode and a light sensor coaxially in proximity to each other, the two slit disks each having a large number of slits formed radially at equal intervals in a periphe... | 11/29/1988 |
| 4782327 | Computer control A computer control includes a control member movably mounted for movement in two dimensions wherein orthogonally related gratings are moved to the corresponding directions to generate pairs of quadrature related signals. Circuitry produces binary signals ... | 11/01/1988 |
| 4740690 | Absolute combinational encoders coupled through a fixed gear ratio An encoder system and technique is disclosed for providing greater resolution for position indications. The encoder includes multiple small absolute encoders coupled through a fixed gear ratio to provide an increase in the number of positions which may be... | 04/26/1988 |
| 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 position of the respective discs as the input shaft ro... | 03/08/1988 |
| 4712088 | Multistage angle encoder with an improved allocation of coarse code information to fine code information A multistage angle encoder includes a fine code disc which is connected via a reducing gear with at least one coarse code disc. In order unambiguously to allocate the coarse code information on the coarse code disc to the fine code information on the fine... | 12/08/1987 |
| 4667096 | Position measuring system comprising at least two scanning units A position measuring system for measuring the relative position of two objects movable with respect to one another includes a housing which rotatably supports a shaft connected with the first object. A first graduation disk with a first incremental gradua... | 05/19/1987 |
| 4555625 | Precision drum encoder Disclosed is a highly precise encoding structure utilizing incremental or absolute encoding techniques. The drum configuration allows the use of less expensive materials and the capability to manufacture such a device in a labor-saving and therefore less ... | 11/26/1985 |
| 4511798 | Meter encoding register with tapered aperture in baffle insert A multiple shaft meter including register characterized by an electrical signal generating system including illuminating source and a plurality of encoding photocells. A light baffle plate is disposed between the illumination source in the photocells and ... | 04/16/1985 |
