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7408318 |
Motor drive unit
A motor drive unit is adapted to detect a motor lock-up condition (in which an electric motor is accidentally locked during driving) based on the fact that motor drive current increases in that...
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6492911 |
Capacitive displacement encoder
A capacitive motion encoder, for sensing the position of a moving object relative to a stationary object, includes at least one stationary element, coupled to the stationary object and a moving...
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6433449 |
Galvanometer unit
A galvanometer unit includes a limited-rotation motor with a load element such as a mirror attached to a shaft extending from the motor. In a servo loop that controls the angular position of the...
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6218803 |
Position sensing with variable capacitance transducers
For enabling precise operation of an oscillating device, such as a galvanometric optical scanner, a capacitive position transducer is provided with strategically located internal capacitive...
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6211641 |
Capacitive resolver
The present invention provides a capacitive resolver (100). The capacitive resolver (100) includes a charge plate (102), a sensing plate (106), and an interrupter plate (400) positioned between the...
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5910781 |
Capacitive angle detector
A capacitive angle detector according to the present invention is capable of detecting a rotating angle with a high precision. The capacitive angle detector includes a first member, a second member...
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5598153 |
Capacitive angular displacement transducer
Measuring device for the measurement of a rotor angle including a capacitive angular displacement transducer generating an output that varies with an angular displacement of a shaft. A first stator...
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5420488 |
Vacuum nozzle having dynamically adjustable placement force
An apparatus and a method therefor is capable of automated and/or robotic assembly. The apparatus includes a vacuum nozzle (201) for aspirating and securing a component (202, 204). A spring (312)...
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5200683 |
Method for optimizing sampling rates for position tracking for motion control systems
An auxiliary resolver position tracking (RPT) system for an industrial robot includes a resolver excitation and monitoring system which is powered by an uninterruptable power supply which includes...
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5198739 |
Software controllable circuit for resolver excitation switching in a motion control system
An auxiliary resolver position tracking (RPT) system for an industrial robot includes a resolver excitation and monitoring system which is powered by an uninterruptable power supply which includes...
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5077635 |
Capacitive position sensor
A capacitive position sensor includes a capacitor arrangement assembled of a stator (5) and a rotor (6). The stator supports at least three coplanar electrodes (21, 22, 23) having the shape of...
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5051671 |
Proximity sensor and control
Sensor circuitry which detects the presence or absence of material and activates a motor responsive thereto, having a capacitor which emits electric signal responsive to the presence of the...
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4986410 |
Machine control apparatus using wire capacitance sensor
A system for controlling the operating speed of a can machine having an input conveyor for temporarily storing cans while moving them along a path toward the machine includes a metal wire...
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4963806 |
Servo positioning apparatus
A notch filter, used in a servo loop, for dampening a mechanical resonance of a mechanism to be servo-controlled, including a serial T-type filter with a capacitor-resistor (CR) network having a...
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4958115 |
Capacitively commutated brushless DC servomotors
There are disclosed both one and two-dimensional, high resolution, brushless DC servomotors that are linear, rotary, planar and cylindrical in nature. All of these employ a capacitive method for...
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4851835 |
Capacitive rotary transmitter for controlling and positioning displaced objects
A capacitive linear or rotary transmitter for controlling and positioning displaced objects by measuring the displacement, angle or speed of the displaced object is formed, in one embodiment as a...
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4755731 |
Optical scanning transducer
There is provided an optical scanning apparatus having an angular positioning means that is generally comprised of a variable capacitor including a rotor disc with a plurality of equally spaced...
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4737699 |
Capacitive position transducer
A capacitive position transducer for detecting position changes or producing position feedback signals in a servorecorder comprises a rhombic transmitter electrode connected to a voltage source and...
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4720698 |
Capacitive encoder having multiple precision outputs
A capacitive position encoder which provides a digital output indication of the relative position between two plates. One of the plates includes first and second conductive input areas which are...
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4694235 |
Capacitive position sensor
A capacitive position sensor for sensing changes in the position of a rotating element, in which there are two sets of stationary capacitive surfaces, one set forming a first integral unit, the...
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4682004 |
Measuring arrangement having a capacitive measuring electrode and a working tool with integrated electrode
In a measuring arrangement for measuring or regulating spacing on thermal working machines (for example, flame cutting installations), two capacitive electrodes are arranged at different spacings...
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4629957 |
Sensing apparatus
A sensing apparatus has a probe displacement with respect to a support arm and to a reference position. The probe has a flat disc mounting three transducers which are spaced apart from one another...
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4630047 |
Capacitive-type position and reference angular rotation detecting apparatus
There is provided a capacity type rotation detecting apparatus which comprises a first insulating circular plate having on one surface thereof at least one pair of sets of electrode pieces arranged...
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4567410 |
Capacitive article density monitor
A capacitance article density monitor which is adjusted to have a zero voltage output when no articles are positioned adjacent a sensor and wherein the output of the circuit may be utilized...
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4527108 |
Linear actuator with magnets
Device for moving a member linearly is composed of at least two permanent magnets, a driving coil, circuit for supplying the driving coil with current, a moving member, and a detector. The two...
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4499465 |
Capacitive-type incremental and reference angular rotation detecting apparatus
There is provided a capacity type rotation detecting apparatus which comprises a first insulating circular plate having on one surface thereof at least one pair of sets of electrode pieces arranged...
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4481451 |
Electronically controlled positioner for pneumatic actuators
An electronically controlled apparatus for controllably positioning pneumatic actuators includes, in a first embodiment, first means for selectively flowing compressed fluid to the actuator and...
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4476415 |
Feedback transducer
A transducer for generating a feedback signal representative of the position of a movable member includes a signal generating mechanism for providing an electrical feedback signal representative of...
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4467253 |
Differential signal decoder
A decoder decodes and accurately scales so-called "tribit" servo signals after the receipt of only one tribit pattern without the use of A.G.C. by storing the peak values of the position indicating...
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4463298 |
Instrument for keeping the distance constant between a tool and a workpiece to be processed
An instrument for maintaining a constant distance between a tool, such as a cutting torch, and a workpiece includes a sensing electrode connected to two different phase control system-building...
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4463299 |
Capacitive sensor motor control system
A servo motor system including a position sensor located within the motor air gap to virtually eliminate mechanical compliance in the servo loop. The transducer is of a capacitive type including...
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4456934 |
Linear positioning system
A linear servo system including a linear motor with a moving permanent magnet the flux of which interacts with current flow through a stator winding. A position servo loop controls the position of...
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4434391 |
Capacitive feedback transducer and closed loop instrument meter mechanism
A display pointer is driven back and forth along a predetermined path by a geared-down miniature d.c. servomotor in accordance with a command signal. The path is determined by an elongated printed...
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4410852 |
Angle-position transducer
Angle-position is determined by relative angular rotation between a capacitive track and a capacitive pick-up probe. The capacitive track is disposed along the region of angular interest. The...
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4409529 |
Prosthesis
A prosthesis comprising: (a) a gripping member; (b) an operating lever mounted to pivot about a pivot axis and operatively connected to the gripping member; (c) a power unit including an...
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4374383 |
Capacitive transducer for sensing a home position
A rotational shaft home position sensing transducer is provided which comprises a rotor mounted on the shaft having a planar surface with a first radial array of conductive elements on the surface...
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4341275 |
Measuring apparatus with electromagnetic force compensation and capacitive position sensor
An electromagnetically compensating measuring apparatus, as in force measuring or weighing devices, wherein a compensation coil is wound upon a coil form movable in the air gap of a stationary...
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4336483 |
Capacitive position sensor
Apparatus for positioning a projected image in response to input signals corresponding to the components of the commanded position of the image along a pair of orthogonal axes. The apparatus...
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4323829 |
Capacitive sensor control system
An electronic control system for controlling the operation of electromotive apparatus utilizes a capacitive sensor for sensing human touch and producing a command signal whose magnitude corresponds...
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4323903 |
Strip chart recorder with a differential capacitor serving as position sensor in a position servo for the recording pen
Strip chart recorders in which the curve is recorded by means of a rotatable pen (11) which traces the curve in a line of contact (14) being a generatrix of a supporting roller (15), suffer from a...
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4300226 |
Compensation apparatus for a servo system with periodic command signals
In a capacitance distance sensor apparatus in a focus servo loop for an optical disc playback and record system, stable high servo loop gain and small closed-loop error correction signals are...
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4298784 |
Arrangement for measuring the distance between a metallic workpiece and a processing tool
An arrangement for measuring the distance between a metallic workpiece and a processing tool includes, in addition to a sensing device having a reactance, a compensation sensing arrangement having...
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4263546 |
Displacement transducer system
A displacement transducer system for providing a signal indicative of the position of a member, comprising a pair of voltage controlled oscillators the frequency of which is determined by a pair of...
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4206400 |
Accelerometer
In order to facilitate construction of a compact, lightweight servoed accelerometer with capacitive pick-off, a one-piece support frame, adapted to be inserted within a cylindrical housing, is used...
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4183060 |
Capacitance distance sensor apparatus for video disc player/recorder
A non-contact type, capacitance distance sensing probe having one or two electrodes disposed about one end of an objective lens system in an optical video disc system is used with a focus control...
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4158171 |
Wafer edge detection system
A noncontact gauge for edge detecting of semiconductor wafers in a test rig which indexes between circuits in the semiconductor wafer to provide functional tests upon them. The noncontact gauge...
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4142144 |
Position detector
A transformerless capacitance detection device for picofarad level capacitances, used in a galvanometer for position feedback. A variable capacitor is connected between transistor emitter and...
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4092579 |
Brushless printed circuit resolver
A brushless printed circuit resolver for converting a shaft angular position to a voltage signal, defined by the envelope of a carrier, which indicates the mechanical angle. The brushless resolver...
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4082990 |
Electrostatic pickoff and torquer
An instrument which performs with precision either as a pickoff or torquer and which is not subject to geometrical errors due to the electrodes going out of round. The pickoff electrodes of the...
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4064539 |
Device for measuring quantities of electric charges or similar electric parameters
A device for measuring quantities of electric charges, or other electric parameters whose magnitudes can be obtained from measurements of quantities of electric charges. The device includes a...
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