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3869655 |
Motor controlled material spreading vehicles
A vehicle is provided with a material discharge apparatus operated by an auxiliary fluid driven motor and an adjustable control valve for the fluid motor. A control system for adjusting the valve...
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3867687 |
Servo gain control of liquid conductivity meter
A liquid conductivity measuring instrument uses a sensing cell having energizing and measuring electrodes and includes a variable gain servo system which is regulated by an attenuator. The...
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3857079 |
MACHINE TOOL UTILIZING A POTENTIOMETER FOR DETERMINING VARIOUS POSITIONS
Machine tool in which movement of the table over the base is produced by a torque-controlled motor and in which the table positions are determined by means of a potentiometer and of preset...
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3809988 |
AUTOMATIC LOAD WEIGHT BALANCING SYSTEM
An automatic load weight balancing system includes an automatic balancing signal generating section comprising a clutch directly or indirectly coupled to a drive shaft, a triple position signal...
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3796938 |
REMOTE CHANNEL OVER-RIDE SYSTEM
A receiver includes a remote-manual switching means and bi-directional motor means responsive to remote signals for driving a rotary switching means to provide potentials representative of selected...
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3789283 |
CONDITION CONTROL REVERSIBLE MOTOR SYSTEM
A condition control reversible motor system operates to rebalance a bridge circuit by means of a feedback potentiometer, the potentiometer wiper providing the energization potential to the bridge...
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3783356 |
NULL BALANCE INDICATING AND CONTROL APPARATUS AND PHASE SENSITIVE PULSE RESPONSIVE CIRCUITS FOR USE THEREIN
In apparatus and circuits especially suitable in instrumentation for indication and control of nuclear power plant coolant systems, a bridge contains in a sensing arm a resistance thermometer or a...
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3755726 |
CLOSED LOOP MOTOR CONTROLLED CONDITION RESPONSIVE SYSTEM
A condition responsive detection system having a feedback servo control to adjust the system response to compensate for normal operational variations in the monitored condition. The detection...
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3743912 |
SERVO-CONTROL SYSTEM
A servo-control system comprising a bridge circuit, a detector circuit, a motor, and a control circuit which functions as a pulsive switching circuit, said detector circuit being controlled by the...
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3740627 |
SERVO MOTOR DRIVEN R.F. ATTENUATOR
A system for cancelling or suppressing the amplitude of the carrier and sideband signals of a radio transmitter to facilitate analysis of spurious and noise outputs from the transmitter is...
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3733484 |
CONTROL FOR ELECTRON MICROPROBE
An electron microprobe has a holder for a sample to be analyzed. The holder is movable along an X-axis and a Y-axis, each at right angles to the electron beam directed at the sample. Drives, each...
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3731173 |
CONDITION CONTROLLED REVERSIBLE MOTOR SYSTEM
A condition controlled reversible motor system, disclosed as a temperature responsive system, operates to rebalance a bridge by means of a feedback potentiometer. The amplifier system connecting...
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3704405 |
POSITIONING DEVICE
A system for controlling a drive mechanism to selectively move a work member from an existing position to a desired position. The system includes a probe-like sensing member adapted to engage and...
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3700995 |
TRIM REFERENCE FOR HELICOPTER FEEL AUGMENTATION SYSTEM
In a feel augmentation system for helicopters in which a force is generated in response to sensed inputs to oppose the pilot's movement of the cyclic stick, a grip mounted thumbwheel controlled...
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3700984 |
DAMPENER CONTROL SYSTEM FOR LITHOGRAPHIC PRINTING PRESS
A dampening system for a lithographic printing press which has a plurality of feed motors for controlling the rate at which dampening fluid is supplied to the printing plate in the press. The...
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3700994 |
MACHINE-CONTROL SYSTEM
A machine-control system is disclosed wherein a potentiometer is connected to a moving machine part to produce a control signal which is compared with a reference voltage developed across a...
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3697849 |
ON-OFF SERVOMECHANISM CONTROLLED BY A WHEATSTONE BRIDGE
A pair of semiconductive switching elements connected in back-to-back relation with each other are energized by a first DC source connected to a bridge circuit including at least two...
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3694711 |
APPARATUS FOR DETECTING FAULTS IN ELONGATED FLEXIBLE MATERIAL
Apparatus for passing wire from a reversible supply drum through or past at least one fault detector to a reversible take-up drum and, upon detection of a fault, for automatically decelerating and...
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3663881 |
CONTINUOUS POSITION SENSING SYSTEM
A system for the precise and spatially-continuous determination of position along a predetermined path, capable of efficient operation even over relatively large distances. The system employs a...
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3662246 |
DIGITAL CONTINUOUS POTENTIOMETER SERVO FEEDBACK ELEMENT
A servo system feedback element including a potentiometer in association with commutating and logic circuitry for providing a continuous and non-ambiguous saw-tooth follow-up output.
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3653059 |
POLARITY REVERSING MEANS FOR MOVING PEN GRAPHICAL RECORDER
A circuit for a moving pen graphical recorder has a first polarity reversing switch coupled between a servoamplifier and a servomotor which drives the pen, and a second polarity reversing switch...
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3644816 |
MANUAL AND AUTOMATIC MASTER-SLAVE CONTROL SYSTEM
A control system including a slave member and a master member for maintaining the slave member in alignment with the master member in response to the movements thereof. Means are provided for...
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3636428 |
SYNCHRO SERVOSYSTEM IN WHICH A POTENTIOMETER WITH UNIQUE CHARACTERISTICS REPLACES THE RECEIVER
Potentiometer structures for synchro systems and synchro systems utilizing such structures. One or more potentiometers are employed in place of the usual rotor and stator inductive transformer...
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3631328 |
ELECTRONIC CONTROL MARINE SEARCHLIGHT
Disclosed herein in a searchlight which is supported for movement about horizontal and vertical axes and a control member for remote operation of the searchlight. The control member is supported...
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3628121 |
POTENTIOMETER SELF-SYNCHRONOUS MOTOR CONTROL SYSTEM
Apparatus for transmitting angular information with improved accuracy is disclosed as applied to transmitting the heading of a gyrocompass from the compass to a remote indicator. A transmitter...
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3617849 |
MOTOR CONTROL DAMPING CIRCUIT
The circuit controlling the motor which actuates a control potentiometer or the like is made up of operational amplifiers and resistors connected so that, at stall, the feedback loop is not...
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3609499 |
ELECTRONIC CHOPPER CIRCUIT
A servo system utilizing an electronic chopper for producing shaft rotation indicative of the amplitude of a DC input signal. The DC signal is converted to square wave form by shunting the signal...
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3581180 |
HIGH SPEED ABSOLUTE POSITION CONTROLS
An arrangement for controlling the positioning of a movable object by power drive means along a defined movement path in accordance with an applied digital position command which comprises power...
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3573816 |
PRODUCTION OF ELECTRIC CIRCUIT ELEMENTS
A method and apparatus is provided for producing electrical circuit elements at a high rate and with accurate electrical characteristics. An amplifier is provided with a DC voltage input which is...
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3548865 |
PRESSURE CONTROL APPARATUS
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3527991 |
SERVOMOTOR CONTROL SYSTEM IN WHICH GAIN IS VARIED IN RESPONSE TO MOTOR TEMPERATURE
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3510739 |
SELF-COMPENSATING SERVO SYSTEM
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3495145 |
POSITION-CONTROL SERVOMECHANISM
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3486092 |
CONTROL APPARATUS FOR AUTOMATIC WAREHOUSE SYSTEM
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3472142 |
CONTROL ARRANGEMENT FOR PHOTOGRAPHIC APPARATUS
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3470431 |
POSITION RESPONSIVE SWITCHING APPARATUS
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3467900 |
POSITIONING APPARATUS WITH CONTROLS EMPLOYING RESISTOR INCREMENTS
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3464004 |
AUTOMATIC BALANCING A.C. BRIDGE INCLUDING RESISTIVE AND REACTIVE BALANCING ELEMENTS CONNECTED ACROSS THE INPUT AND TO THE OUTPUT OF THE BRIDGE
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3457494 |
VOLTAGE REGULATION WITH CORRECTION SPEED PROPORTIONAL TO ERROR
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3452258 |
DIGITAL-ANALOG FEEDBACK CONTROL SYSTEM EMPLOYING SOLID STATE DIGITAL POTENTIOMETER
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3445071 |
METHOD AND APPARATUS FOR WINDING A PRECISION RESISTOR
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3444446 |
FINE-MEDIUM-COARSE SERVOMOTOR POSITION CONTROL
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3441817 |
MACHINE CONTROL SYSTEM FOR GENERATING RECTILINEAR AND CURVILINEAR GEOMETRICAL FORMS
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3432744 |
CONTROL CIRCUITS FOR CARD OPERATED BATCHER
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3428149 |
CONTROL APPARATUS FOR MATERIAL-UNIT STACKER
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3423656 |
SPLINE INTERPOLATOR WITH INTERPOLATING POTENTIOMETERS
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3419775 |
On-off and proportional position servo motor control system
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3418547 |
Step-servocontroller
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3406309 |
Reversible semiconductor direct current motor drive circuit
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3405336 |
Servo repositioning circuit in a servomotor drive system for compensating servomotor overtravel
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