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Class Information
Number: 341/6
Name: Coded data generation or conversion > Digital pattern reading type converter > With directional discrimination
Description: Subject matter in which the digital pattern carrier and the pattern reading device have bidirectional motion therebetween, and includes circuitry or structure to distinguish the direction of such movement.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8659448 Movement detection device Feb. 25, 2014
8552892 Signal sample trigger apparatus, data acquisition system and method of sampling an analogue signal Oct. 8, 2013
8546743 Encoder in which the relative displacement between the encoder scale and encoder head is detected Oct. 1, 2013
7369063 Encoder signal processing circuit including a direction determining/counting unit May. 6, 2008
6999006 Rotation position detecting device Feb. 14, 2006
6967595 Input method of encoder signals Nov. 22, 2005
6696984 Apparatus and method for sensing rotary switch handling direction of monitor Feb. 24, 2004
6606036 Apparatus and method for sensing rotary switch handling direction of monitor Aug. 12, 2003
6541760 Rotation detecting apparatus detecting rotation operation by light transmission to prevent invalid detection Apr. 1, 2003
6525675 Position encoder for determining the angle or position and the total angle on distance moved Feb. 25, 2003
6507292 Positional encoder assembly Jan. 14, 2003
6430479 Methods, apparatus and computer program products for determining the vertical speed of an aircraft Aug. 6, 2002
6323786 Absolute-value encoder device Nov. 27, 2001
6300884 Method for decoding a quadrature encoded signal Oct. 9, 2001
6246343 Increment encoder failure detection Jun. 12, 2001
6058358 Device for direction of rotation recognition and plausibility testing in absolute angular position measuring devices especially with serial transmission of actual positions detected May. 2, 2000
6043483 Apparatus and method using an indexed-encoder to sense the absolute position of an object with a single set of optics Mar. 28, 2000
5977765 Speed, direction, and acceleration sensor for a rotating shaft having a rotor with teeth having unequal spacing Nov. 2, 1999
5774068 Absolute signal detecting method and absolute encoder Jun. 30, 1998
5663933 Meter circuit Sep. 2, 1997
5608394 Position detecting method and apparatus Mar. 4, 1997
5602544 Absolute encoder and method of generating its current position Feb. 11, 1997
5537322 System and method for determining a gradient speed of a shaft driven by an internal combustion engine Jul. 16, 1996
5461375 Forward/backward counting device Oct. 24, 1995
5264844 Apparatus for detecting rotational angular position for internal combustion engine Nov. 23, 1993
5264789 Method of determining the direction of rotation of a member using a rotor having a predetermined pattern of exciter surfaces Nov. 23, 1993
5257024 Search position encoder Oct. 26, 1993
5239297 Position-encoded screw and method and system for calibrating a position-encoded screw Aug. 24, 1993
5200683 Method for optimizing sampling rates for position tracking for motion control systems Apr. 6, 1993
5187479 Backlash compensation circuit for use with an incremental encoder Feb. 16, 1993
5012239 High resolution position sensor circuit Apr. 30, 1991
5007057 Power source monitor and a rotary encoder with such a monitor Apr. 9, 1991
4982189 Encoder with wide index Jan. 1, 1991
4922176 Electronic absolute coordinate encoder for positional control devices May. 1, 1990
4918443 Method for determining a rotational angle of a rotary body Apr. 17, 1990
4892312 Operating device for TV game machine Jan. 9, 1990
4864300 Rotating high-resolution shaft encoder utilizing capacitive sensing Sep. 5, 1989
4831376 Optical analog-to-digital converter and transducer May. 16, 1989
4829248 Hall effect sensing apparatus and method May. 9, 1989
4811254 Displacement detector for an encoder Mar. 7, 1989
4782329 Displacement detector for an encoder Nov. 1, 1988
4780703 Rotary encoder apparatus Oct. 25, 1988
4774494 Position encoder employing three or more colors Sep. 27, 1988
4737710 Hall-effect array for sensing second spatial derivative of magnetic field Apr. 12, 1988
4694279 Vector electronic control device Sep. 15, 1987
4644157 Optical rotation detecting apparatus Feb. 17, 1987
4630928 Length measuring device Dec. 23, 1986
4623831 Rotor position sensing apparatus for motors Nov. 18, 1986
4607956 Position detecting apparatus Aug. 26, 1986
4603238 Fast indexing encoder apparatus Jul. 29, 1986

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