Abstract: An acoustic device includes a rotary operator and a base supporting the rotary operator so that the rotary operator is rotatable. The base includes a braking unit configured to be brought into contact with the rotary operator to cause a braking force to act on the rotary operator and an adjuster configured to adjust the braking force caused by the braking unit. The braking unit includes a plurality of contact members configured to be brought into contact with the rotary operator to cause the braking force to act on the rotary operator. The braking force acting on the rotary operator by the plurality of the contact members varies depending on an adjustment amount by the adjuster.

Abstract: A power management system includes a sensor interface that receives sensor data samples during operation of a vehicle. A storage device stores the sensor data samples for multiple points in time along a route segment traveled by the vehicle. One or more processors analyze the sensor data samples to detect a historical pattern of the vehicle. The one or more processors determine time efficient operational parameters for the vehicle in response to a destination and an estimated travel time to the destination. The estimated travel time may be based on predicted conditions of the vehicle indicated by the historical pattern. The time efficient operational parameters may be selected to decrease the estimated travel time. At least one of the sensor data samples may include telemetry data.

Abstract: An electronic device, such as a smart watch, incorporating a fluid-based pressure-sensing device is disclosed. The fluid-based pressure-sensing device includes an enclosure, a pressure sensor, a diaphragm and a sensing medium. The enclosure includes an opening and the pressure sensor is disposed inside the enclosure. The diaphragm hermetically seals the opening, and the sensing medium transfers a pressure exerted on the diaphragm to the pressure sensor. The sensing medium can be liquid oil filling a space of the enclosure, and the diaphragm is a polymer material. The pressure-sensing device may sense an environmental pressure, which may be used by the electronic device to modify its operations, change information that is displayed, and so on.

Abstract: A robot includes a base, a robot arm provided to be turnable around a turning axis with respect to the base, and an encoder including a mark configured to turn around the turning axis according to the turning of the robot arm and an imaging element configured to image the mark, the encoder detecting a state of the turning of the robot arm using a signal output from the imaging element. The encoder includes a telecentric optical system disposed between the imaging element and the mark.

Abstract: An encoder without a stopping structure comprises a rotating shaft (1), an axis sleeve (2), a stopping base (4), a positioning elastic trip (5), a spacer (6), a partition plate (7), at least one movable arm (8), at least one electric brush (9) and at least one main body (11), and they are sequentially arranged from bottom to top. There is not any stopping structure on the rotating shaft (1) and the stopping base (4). The rotating shaft (1) can be rotated 360 degrees or more. The electric brush (9) has a plastic covered part (91), a bent part (92), an elastic arm (93) and a brush head (94) forming an integrated structure. The plastic covered part (91) is covered in a movable arm (8). The bent part (92) connects the plastic covered part (91) and the elastic arm (93) and bends the elastic arm (93) toward the plastic covered part (91). The elastic arm (93) comprises a main arm (931) with long strip ring body and a branch arm (932).

Abstract: An encoder without a stopping structure comprises a rotating shaft (1), an axis sleeve (2), a stopping base (4), a positioning elastic trip (5), a spacer (6), a partition plate (7), at least one movable arm (8), at least one electric brush (9) and at least one main body (11), and they are sequentially arranged from bottom to top. There is not any stopping structure on the rotating shaft (1) and the stopping base (4). The rotating shaft (1) can be rotated 360 degrees or more. The electric brush (9) has a plastic covered part (91), a bent part (92), an elastic arm (93) and a brush head (94) forming an integrated structure. The plastic covered part (91) is covered in a movable arm (8). The bent part (92) connects the plastic covered part (91) and the elastic arm (93) and bends the elastic arm (93) toward the plastic covered part (91). The elastic arm (93) comprises a main arm (931) with long strip ring body and a branch arm (932).

Abstract: 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 carrier and a first multiturn evaluation unit for processing first multiturn position signals to form a first multiturn code word that indicates the number of revolutions covered by input shaft; and a second multiturn unit, including at least one second multiturn code carrier and a second multiturn evaluation unit for processing second multiturn position signals to form a second multiturn code word that likewise indicates the number of revolutions covered by the input shaft. The functioning of the multiturn units is ascertainable by the multiturn code words generated independently of each other.

Abstract: A rotary encoder includes a case made of insulating resin, a rotatable operation shaft, a slidable brush fixed to the operation shaft, and a signal contact embedded in a surface of the case. The slidable brush has a contacting section slidable on a surface of the case on a predetermined circumference according to a rotation of the operation shaft. The signal contact has an upper surface flush with the surface of the case, a first side surface connected to the upper surface at a first corner having a right angle, a second side surface connected to the upper surface at a second corner having a right angle, and a lower surface opposite to the upper surface. The first and side surfaces are positioned on the predetermined circumference. The lower surface has a width smaller than a width of the upper surface. This rotary encoder has a small size and outputs a signal precisely.

Abstract: In one embodiment of the present invention, a rotary encoding switch is disclosed such as used in the function setting for relays or similar. In one embodiment, a particularly secure function setting for relays or similar may be achieved by means of a rotary encoding switch with a number of switch stages with separations between the switch stages which are not constant.

Abstract: 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 device for oil or natural gas production and a second device part which is stationary relative to said first device part. To detect both the directions of movement and the respective position in a simple constructional and inexpensive way without the need for return movement up to ends of the range of movement, the first and/or second device part comprises a coding pattern which is changing along a direction of movement and of which position-specific patterns can be scanned by a scanning means which is arranged on the respective other device part. By scanning such a specific coding pattern during mutual relative movement of said objects or device parts a corresponding scanning signal can then be converted by an evaluation unit into a kinematic measurable variable.

Abstract: A digital incremental encoder for generating an output signal indicative of an angular position, a direction of rotation, and a speed of rotation of a shaft. A counter receives a PWM signal indicative of the angular position of the shaft and a clock signal from an angular position sensor, and generates a multi-bit output. A latch latches the multi-bit output, a first bit and a second bit of which are used to generate the output signals that include the first bit. The first bit and the second bit may be XOR'd together to generate an XOR output included in the output signals. A direction of rotation may be derived from a quadrature phase relationship between the first bit and the XOR output. The angular position sensor may be an NCAPS or MT-NCAPS. A linear position sensor may be used instead of an angular position sensor to generate the PWM signal.

Abstract: A procedure for determining an absolute position of an object, which includes scanning a code pattern from a series of code patterns, wherein each code pattern of said series of code patterns unambiguously defines one absolute position and comprises a plurality of code elements. Forming a code word with a plurality of bits by the scanning the code pattern. Checking the plurality of bits of the code word for reliability, and if one of said plurality of bits fails to attain predetermined criteria, it is assigned an error code. Predetermining a series of bit strings, with one absolute position being unambiguously assigned to each one of the series of bit strings. Comparing the bits of the code word with the predetermined series of bit strings, and if a match of all of the bits of the code word and the predetermined series of bits strings occurs, assigning a corresponding absolute position to the code word, and upon comparison for a match, any bits assigned an error code are not taken into account.

Abstract: Rotary electronic component of the invention has a contact board and an elastic contact. The contact board, including an annular contact having an arc-segmental portion split by a slit with a predetermined width and signaling contacts disposed at spaced positions and in electrical continuation with the arc-segmental portion, is fixed in a resin molding with the annular contact exposed on the top plane of the resin molding. The elastic contact slides on the contact board along the annular contact. In this rotary electronic component, a stress occurring when the annular contact is fixed by molding on to the contact board is relaxed owing to presence of the slit. Thus, a rotary electronic component generating an electric signal with a stabilized waveform over a long time can be obtained.

Abstract: A rotary encoder has housing case provided with common electrode and signal electrode disposed to an area narrower than the entire circumference, or an angular range of generally ½ of the circumference in concentrical with central hole of housing case, and sliding contact in a confronting manner to the electrodes, the sliding contact provided with four combinations of contacts points arranged at four equally divided angular positions, or every 90 degrees along the same circumference about the rotary axis, each of the combinations comprises contact point on inner side for connectively sliding on common electrode and two contact points on outer side for connectively sliding on signal electrode. The rotary encoder of this structure can reduce the cost by decreasing a width of material needed for fabrication of electrodes, and decrease distances for contact points to slide on electrodes, to thereby improve durability to sliding abrasion.

Abstract: A compact low profile fader has an elongate support and a manually settable slider mounted for linearly slidable relative to the elongate support. A drive transmission operably interconnecting the slider and a digital encoder so that movement of the slider produces a digital output signal from the digital encoder. The digital encoder has a rotatable encoder disk and is mounted so that its longitudinal direction of extent is in alignment with that of the elongate support. The drive transmission includes a drive pulley and a loop of cord which is wound around the pulley. The pulley drives the rotatable encoder and has a helical groove in its peripheral surface. The cord is engaged in the helical groove and with the slider so that movement of the latter causes the pulley, and thereby the rotatable encoder disk, to be rotated.

Abstract: An admixture of thermoplastic polymer (such as thermoplastic elastomer), cured elastomeric polymeric material (such as thermoset elastomer), and magnetizable (ferrite) powder provide a thermoplastic elastomer featuring a relatively high loading of a magnetizable material. The admixed magnetizable thermoplastic elastomer composition, optionally cured, provides robust material properties along with good forming properties for molding magnetic components. This material is advantageous for a magnetic target wheel in an encoder.

Abstract: Rotary electronic component of the invention has a contact board and an elastic contact. The contact board, including an annular contact having an arc-segmental portion split by a slit with a predetermined width and signaling contacts disposed at spaced positions and in electrical continuation with the arc-segmental portion, is fixed in a resin molding with the annular contact exposed on the top plane of the resin molding. The elastic contact slides on the contact board along the annular contact. In this rotary electronic component, a stress occurring when the annular contact is fixed by molding on to the contact board is relaxed owing to presence of the slit. Thus, a rotary electronic component generating an electric signal with a stabilized waveform over a long time can be obtained.

Abstract: A rotary encoder has housing case provided with common electrode and signal electrode disposed to an area narrower than the entire circumference, or an angular range of generally ½ of the circumference in concentrical with central hole of housing case, and sliding contact in a confronting manner to the electrodes, the sliding contact provided with four combinations of contacts points arranged at four equally divided angular positions, or every 90 degrees along the same circumference about the rotary axis, each of the combinations comprises contact point on inner side for connectively sliding on common electrode and two contact points on outer side for connectively sliding on signal electrode. The rotary encoder of this structure can reduce the cost by decreasing a width of material needed for fabrication of electrodes, and decrease distances for contact points to slide on electrodes, to thereby improve durability to sliding abrasion.

Abstract: In one aspect, in a device such as a printer, an encoder system method initializes the system to produce analog output signals that fall outside the detection range of an A/D converter of the system. In another aspect, in a device such as a printer, an encoder system method initializes the system without converting analog signal levels into corresponding digital values.

Abstract: A compact low profile fader has an elongate support (10) and a manually settable slider (12) mounted for linearly slidable relative to the elongate support (10). A drive transmission (16) operably interconnecting the slider (12) and a digital encoder (14) so that movement of the slider (12) produces a digital output signal from the digital encoder (14). The digital encoder (14) has a rotatable encoder disk (46) and is mounted so that its longitudinal direction of extent is in alignment with that of the elongate support (10). The drive transmission (16) includes a drive pulley (60) and a loop of cord (18) which is wound around the pulley (62). The pulley (60) drives the rotatable encoder (46) and has a helical groove in its peripheral surface. The cord (18) is engaged in the helical groove and with the slider (12) so that movement of the latter causes the pulley (260), and thereby the rotatable encoder disk (46), to be rotated.

Abstract: A current sensing system including a carrier strip, the carrier strip disposed so as to be associated with a current carrying conductor, wherein when an electrical current flows through the conductor, the electrical current flowing through the conductor creates a magnetic field having a magnetic flux, wherein the magnetic flux is responsive to the electrical current flow, a Hall effect sensor disposed relative to the carrier strip such that the Hall effect sensor is communicated with the magnetic field, wherein the Hall effect sensor generates an electrical signal responsive to the magnetic flux and a metering device in communication with the Hall effect sensor, wherein the metering device processes the electrical signal so as to create a processed signal responsive to the electrical current flow.

Abstract: 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 input shaft, a multiturn part is provided with further code disks in the form of magnet bodies which are driven geared down. A printed circuit board having detector devices for scanning the first code disk and the magnet bodies is positioned between the first code disk and the multiturn part. The detector devices of the first code disk and of the magnet bodies are mounted on one common side of a printed circuit board which is opposite the first code disk.

Abstract: A potentiometer and logic circuitry attached to a common substrate. In one aspect the potentiometer and logic circuitry is an integrated potentiometer mounted on an upper surface of a circuit board with circuitry on a lower surface of the circuit board. The circuitry conducts the position and movement of the potentiometer into potentiometer output signals.

Abstract: The present invention relates to a potentiometer assembly including a position sensing device and an integrated control circuit to form a potentiometer assembly providing an encoded output signal representing a position of a user operable control means. The encoded output signal may be in the form of a digital data signal or an encoded analogue signal representing the position of the user operable control means so that an external device, such as a Digital Signal Processor (DSP) or microprocessor, may read and decode the encoded output signal. In particular, the present invention is suitable for use in compact electronic equipment, such as mobile phones and hearing instruments. Such equipment will benefit from the versatile functionality of the potentiometer assembly according to the present invention allowing a broad range of applications to be supported.

Abstract: A brush encoder includes a coding-plate support member, to which a coding plate is fixed, and a brush support member, to which a brush is fixed, the brush having a base portion and resilient contact strips. The brush support member includes a support surface to which the base portion of the brush is mounted; at least one through slot through which the resilient contact strips of the brush extend to come in sliding contact with the coding plate; and a fulcrum portion, which contacts the base portion of the brush in the vicinity of a border between the base portion and the resilient contact strips, so as to serve as a fulcrum about which the brush is biased to rotate in a direction to make the base portion contact the support surface when the resilient contact strips are pressed against the coding plate.

Abstract: A rear-mount integrated rotary encoder comprises a mechanical portion and a printed circuit board portion. The mechanical portion of a rear mount integrated rotary encoder comprises a housing including a bushing for receiving one end of a rotatable. The rotatable shaft passes through an open front portion of the housing and is mechanically connected to exposed rotatable circuit contacting members. The printed circuit board portion has an encoder contact pattern formed thereon. The printed circuit board has an area larger than the cross sectional area of the housing. The encoder contact pattern surrounds an aperture in the circuit board. The rotatable shaft of the rotary encoder is passed through the aperture such that the rotatable circuit contacting members contact the encoder contact pattern on the circuit board. The housing includes projections, substantially orthogonal to the circuit board, for engaging a feature of the circuit board for securing the integrated encoder in an assembled state.

Abstract: 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 present at an output of the scanning device and a second code carrier for measuring the number of revolutions of the input shaft. A reduction gear is arranged between and coupled to the first and second code carriers. The second code carrier includes a magnetic body with at least one north and south pole and a substrate with a spatial arrangement of sensor elements integrated therein, which are sensitive to magnetic fields, is associated with the magnetic body.

Abstract: A positional encoder assembly including a positional encoder, an interface unit releasably connectable with the positional encoder for connecting the positional encoder with a data bus, and connection elements providing for connection of the interface unit with the positional encoder and for disconnection of the interface unit therefrom upon displacement of the interface unit relative to the positional encoder.

Abstract: A potentiometer and logic circuitry attached to a common subtrate.

Abstract: An integrated digital electronic encoder that converts mechanical movement of a device input into a signal that can be applied to particular purposes is described. The encoder and associated signal conditioning and processing circuitry are embedded together as a single unit for simplicity of assembly into particular applications, and reliability. The integrated digital electronic encoder includes a substrate with first and second substantially opposed major surfaces, and a digital encoder formed on the first major surface of the substrate. The encoder comprises an actuation shaft, and the encoder is configured to generate electrical signals in response to movement of the actuation shaft. Electronic circuitry is attached to the second major surface of the substrate, preferably using surface mount technology. The electronic circuitry is electrically connected with the digital encoder to process the signals produced by the encoder.

Abstract: A brush encoder includes a coding-plate support member, to which a coding plate is fixed, and a brush support member, to which a brush is fixed, the brush having a base portion and resilient contact strips. The brush support member includes a support surface to which the base portion of the brush is mounted; at least one through slot through which the resilient contact strips of the brush extend to come in sliding contact with the coding plate; and a fulcrum portion, which contacts the base portion of the brush in the vicinity of a border between the base portion and the resilient contact strips, so as to serve as a fulcrum about which the brush is biased to rotate in a direction to make the base portion contact the support surface when the resilient contact strips are pressed against the coding plate.

Abstract: A volume control knob for use with a laptop computer uses the engagement between the springs and the connecting plates to generate different messages. The messages will then be transmitted to the chip received in the secondary control device. With the messages received by the chip, the volume of the laptop computer is controlled.

Abstract: An electrical apparatus having at least one parametrizable function and which includes at least one potentiometer having an actuation member, cooperating with notched indexation devices demarcating several discrete positions of the actuation member. Each discrete position corresponds to a desired value of a parameter. An analogue/digital conversion and interpretation circuit receives an analogue voltage delivered by the potentiometer, dependent on the discrete position taken by the actuation member, and delivers a digital signal representative of the position of the actuation member and hence of the desired value of the parameter.

Abstract: A rotary switch includes a plurality of first electrical contacts disposed at a common radius and a plurality of second electrical contacts mounted for rotation against said first electrical contacts at said common radius. The first electrical contacts include at least one contact representing a selectable logic level and other first contacts electrically isolated from the at least one contact. The second electrical contacts electrically couple the logic level contact(s) with a unique combination of the isolated contacts in each of the respective switch positions.

Abstract: The present invention relates to a mechanical coder. The mechanical coder includes a gear-shaped and conductive signal-separating wheel having a plurality of recesses. Each of the recesses of the signal-separating wheel is filled with insulating material to form a plurality of insulating portions. The surface of the signal-separating wheel is smooth so that the topography is avoided. The mechanical coder further includes a terminal module consisting of a first terminal, a second terminal and a common terminal. The common terminal is coupled to the conductive portion so that the common terminal is normally “ON”. The first terminal and the second terminal are coupled to the opposite side of the signal-separating wheel, respectively.

Abstract: A position sensor including a rotational shaft (7), a plurality of brushes (13, 15, 17, 19) supported by the rotational shaft (7), a housing (3), a printed circuit board (21) fixed to the housing (3), a main conductor (M) provided on the printed circuit board (21) and contacting with the brushes (13, 15, 17, 19) for generating a primary signal in accordance with which a predetermined number of positions has been attained by the rotational shaft (7), and a subordinate conductor (S) provided on the circuit board (21) and contacting with the brushes (13, 15, 17, 19) for generating a secondary signal in accordance with the which a predetermined number of positions has been attained by the rotational shaft (7). The secondary signal keeps the same voltage level around a predetermined position. According to the present invention, the predetermined position of the rotational shaft (7) may be detected accurately. Further, the cost of the position sensor may be reduced.

Abstract: A device for detecting a position of a moving body is provided in which a position of a moving body such as a window glass of a power window device can be detected with high accuracy, initial positions can be set without complicated adjustment, such can be realized with a simple structure and at a low cost, and assemblability can be greatly improved. In the device for detecting a position of a moving body, fixed contacts press-contact a flange portion of a ring gear from a side opposite a side at which a cover plate is disposed. Accordingly, the fixed contacts can be installed after the ring gear. In a state in which the ring gear is provisionally installed, press-contact force of the fixed contacts is not applied to the ring gear. As a result, the ring gear does not rise and positional deviation does not occur, and therefore, the assemblability can be greatly improved.

Abstract: A position detecting device comprises a pattern member having conductive patterns arranged in plural tracks; a slidable member having plural sliding pieces capable of sliding on the conductive patterns, wherein each of the sliding pieces assumes either a conductive state in contact with one of the conductive patterns or a non-conductive state not in contact with the conductive pattern; a signal processing device for detecting sets of the conductive patterns and the sliding pieces in conductive state, by transmitting electrical signals through the conductive patterns and the sliding pieces; and a discriminating device for identifying the relative position between the conductive patterns and the sliding pieces when the the conductive patterns and the sliding pieces in conductive state are detected at least a predetermined number of times or over at least a predetermined period of time.

Abstract: A pulse generator includes a code plate which is provided with a plurality of grounding land portions and a plurality of pulse generating land portions having a potential different from a potential of the grounding land portions, arranged in a direction of rotation about a specific position, and a pair of interconnected contact terminals which are rotated in one direction about the specific position of the code plate to come successively into contact with the grounding land port ions and the pulse generating land portions. The positional relationship between the contact terminals and the grounding land portions and the pulse generating land portions is such that when one of the contact terminals comes into contact with the pulse generating land portions during the rotation of the contact terminals, the other contact terminal is brought into contact with the grounding land portion.

Abstract: An absolute position encoder converts absolute mechanical position to a digital output value. A single-track, rotary embodiment of the encoder includes several conductive pick-up segments that are symmetrically arranged along a circular pick-up track, with each pick-up segment connected to a respective output terminal. A metallic rotor of the encoder comprises a plurality of contacts that are positioned in alignment with the pick-up track such that the contacts slidably contact different pick-up segments as the rotor is rotated. The contacts on the rotor are conductively interconnected, and are maintained at a common voltage via a sliding connection between the rotor and a collector ring. The output of the encoder is a cyclical Gray code sequence, which may be used in combination with a ROM look-up table to accurately track position. Linear and multi-track embodiments are also disclosed.

Abstract: A position recognition arrangement for a selector lever in motor vehicles, in which a separate recognition switch is assigned to every valid and selectable position. The recognition switches are actuated simultaneously in a transition area from one position to the adjacent position. Preferably, the recognition switches are formed by mutually separate contact paths which extend in the operating direction of the selector lever, of which at least the respective adjacent contact paths are offset with respect to one another perpendicularly to the operating direction and overlap one another at least in a transition area relative to the perpendicular line with respect to the operating direction.

Abstract: An absolute position encoder converts absolute mechanical position to a digital output value. A single-track, rotary embodiment of the encoder includes several conductive pick-up segments that are symmetrically arranged along a circular pick-up track, with each pick-up segment connected to a respective output terminal. A metallic rotor of the encoder comprises a plurality of contacts that are positioned in alignment with the pick-up track such that the contacts slidably contact different pick-up segments as the rotor is rotated. The contacts on the rotor are conductively interconnected, and are maintained at a common voltage via a sliding connection between the rotor and a collector ring. The output of the encoder is a cyclical Gray code sequence, which may be used in combination with a ROM look-up table accurately track position. Linear and multi-track embodiments are also disclosed.

Abstract: An apparatus for position detection using signal patterns created by use of a fixed disk having three conductive patterns disposed thereon. The first and second patterns are annular conductive paths which are concentric with respect to one another and the third pattern consists of radially extending conductive portions which are electrically connected to the second pattern. A brush carried by a rotating member whose position is sought to be determined is maintained in contact with the first and third pattern. In this manner an electrical signal variation is encountered as the radially extending conductive portions are encountered by the brush upon rotation thereof. This variation is thus correlated to the pattern defined on the third pattern. A microprocessor is used to add and subtract signals as the brush is rotated from a reference position based upon an indicia of motor direction.

Abstract: A contact type rotary encoder, comprising a printed wiring board having annular comb-shaped electrodes, and an arcuate electrode printed thereon, and a rotary member having three through-holes positioned around the center thereof at substantially equal angular intervals, and at different distances from the center of the rotary member. The contact type rotary encoder further comprises electrically conductive balls rotatably fitted in the through-holes and positioned to roll on the electrodes.

Abstract: 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.

Abstract: The search position encoder includes a generally planar medium, a search probe and a device for moving the probe generally parallel to the surface of the planar medium, and indexing device for locating the actual position of the probe relative to a fixed location on the generally planar medium. A plurality of gratings consisting of alternating strips of conducting and non-conducting materials are arranged on or adjacent to the medium parallel to orthogonal axes of the medium, and a device for sensing the movement of the probe in a plane parallel to the gratings. The location of the probe may then be determined based upon the sensing of the passage of the probe relative to the gratings.

Abstract: An apparatus and method for simulating a mechanical detent in a manually operable rotary digital encoder typically used to control a display or readout in an associated electronic system. The output from the encoder to the electronic system is suspended for a predetermined time when the encoder shaft is rotated past a predetermined preset point. While the encoder output is suspended, the output signal V.sub.o to the electronic system is set at a level indicative of the preset point. The system user is thus able to quickly locate the preset point without overshooting it. If the user does, in fact, want to adjust the encoder past the preset point, the delay is of such a duration that it will have expired by the time the user repositions his hand on the encoder knob, thus allowing adjustment of the encoder to continue beyond the preset point.

Abstract: A pen-type computer input device is used to move a cursor on the display of a computer system or enter data such as of figures, letters, numerals, or the like into a computer system. The pen-type computer input device includes a shank, a ball rotatably supported on the tip end of the shank, the ball having a plurality of identifiable regions on an outer peripheral surface thereof, and a circuit including a sensor unit for detecting the identifiable regions in response to rotation of the ball, and for detecting the directions in which the ball rotates and the distances by which the ball moves two perpendicular directions in a plane, and producing an output signal representative of the directions and distances. Since the sensor unit can detect the distance by which the pen-type computer input device moves without any mechanical motion transmitting mechanism incorporated in the shank, the pen-type computer input device may be small in size and can be handled with ease.

Abstract: An absolute encoder for detecting the absolute (as opposed to the relative) rotational displacement of an encoder shaft includes a pair of pitch signals recorded on tracks and an associated signal processing circuit. The pair of pitch signals have different periods (wave lengths) which are such that they have no common factors. The signal processing circuit includes magnetic sensors for producing absolute position data indicative of the degree of displacement of the encoder shaft, on the basis of the pitch signals. Through the use of a pair of pitch signals having periods with no common factor, a high degree of resolution is obtained, without having no significantly increase the number of pitch signal tracks.

Abstract: An improved encoder for indicating angular position or rotation of a shaft, and particularly a digital encoder for use with materials handling vehicles, includes an index mark in an index band of the encoder that is made wider than the marks in the data tracks. Associated detecting circuitry is responsive to the wide index mark for creating a dead band around a neutral position of the encoder to permit the free movement of the encoder shaft by an angular amount determined by the width of the index band. The wide index band enlarges the tolerance permitted in the return of the shaft to its neutral position and when installing the encoder on a shaft. When an encoder having a wide index band is used with a control handle, such as in positioning devices and accelerators on materials handling vehicles, the control handle has an improved feel and response.