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4578621 |
Stock advancing apparatus with dancer operated potentiometer speed control
A stock reel having a variable speed electric reel drive motor and a speed control potentiometer operated by a stock loop control arm for producing a variable control voltage correlative with the...
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4303875 |
Device for the remote control of the angular position of an aerial rotor
A device for the remote control of the angular position of an aerial rotor comprising a d.c. motor for the rotation of the rotor and a drive circuit adapted to cause the rotation of the motor in...
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4300080 |
Power driver control circuit for servo actuator
A power driver control circuit (38) provides control signals (44, 46, 48, 50, 52, 54) for switching transistors in a power driver (56) for an electromagnetic actuator (11) of the type used for...
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4290000 |
Power amplifier with current limiter circuit
A power amplifier is disclosed for controlling the current flow through a load, such as a d-c servo motor. The amplifier includes a plurality of switching elements connected in bridge fashion with...
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4282467 |
Controller system for rotary actuator
This invention relates to the hydraulic control field wherein an electronic controller provides the necessary electrical elements for controlling the movement of an actuator shaft from one...
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4220903 |
System for guiding a tool
A system for guiding a tool according to a predetermined direction includes a detector head which photoelectrically scans a line of the pattern with the line varying in width at predetermined...
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4112343 |
Bidirectional self balancing bridge
The disclosed system includes a direct-current bridge circuit and a bridge-balancing reversible motor coupled to the bridge circuit, together with a differential high-gain amplifier which is...
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4057755 |
Thermal conductivity detector circuit
There is disclosed a circuit which supplements a bridge-type detector circuit in order to minimize non-linearities resulting in measurements of thermal conductivity by such type bridges. An...
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4054825 |
Control arrangements
A control arrangement is described for angularly positioning a member such as an aerial structure in which a potentiometer has a continuous circumferential winding with two sets of tappings of at...
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3975669 |
Electronic damper motor control
There is disclosed a motor control circuit that is particularly useful for the control of a damper motor in a heating and ventilating system. The control circuit comprises a bridge circuit having a...
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3963051 |
System for the remote control of the jack cylinders of a hydraulically operated crane
A remote control system for the jack cylinders of a hydraulically operated crane includes a plurality of regulating valves for controlling respective jack cylinders, the regulation of each valve...
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3915325 |
Electronic control device
An electronically controlled return to dig assembly, which after initial indexing, automatically positions the tool on a tractor loader. The electronic assembly operates to compare current in...
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3752189 |
ELECTRICAL FEEDBACK SERVOVALVE
An electrical feedback signal for an electrohydraulic servovalve is provided by electrical strain gauge means influenced by the bending of a cantilever beam one end of which is constrained to move...
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3747849 |
CONTROL DEVICE FOR A HEATING INSTALLATION
A control device for a heating installation incorporating mechanism for influencing the temperature of a heat carrier, the control device possessing temperature-dependent resistors for sensing the...
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3739738 |
SAFETY CIRCUIT FOR ELECTRIC STEERING SYSTEM
Disclosed herein is a control circuit for monitoring the steering system of a marine propulsion device, which control circuit includes a first position sensing potentiometer adapted to be connected...
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3699427 |
PULSE GENERATING DIRECT-CURRENT MEASURING BRIDGES
A measuring bridge regulator in which the bridge diagonal circuit has a capacitor, and also, in parallel with the capacitor, a break-through device and the primary winding of an impulse...
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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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3674094 |
AUTOMATIC SLOPE CONTROLLER
A controller for a road finishing machine which is adapted to match the slope of the surface presently being prepared to the slope of an adjacent surface previously prepared embodying a first means...
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3673484 |
REMOTE SERVO CONTROL CIRCUIT FOR REMOTE CONTROLLED SWITCHES AND SWITCHBOARDS
A unique remote control circuit is used to permit the automatic control of switches and switchboards from a remote location. The remote control circuit of this invention permits such control with...
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3667024 |
BIDIRECTIONAL SERVOMOTOR SYSTEM
A servomotor system is disclosed which may be used for an antenna rotator or the like with a bidirectional AC motor controlled as to direction by a low voltage relay having double throw contacts. A...
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3662243 |
ELECTRICAL CIRCUIT FOR STEERING AND THROTTLE CONTROL OF A MARINE PROPULSION DEVICE
Disclosed herein is a steering control for the steerable unit of a marine propulsion device, such as a stern drive unit, which control includes a first potentiometer connected to a source of...
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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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3586952 |
MULTIFINAL ELEMENT SINGLE MASTER CONTROL SERVOSYSTEM
Servosystem for use with a plurality of movable accessories comprising a master variable resistor having a positionally adjustable member, a plurality of slave variable resistors each having a...
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3571688 |
PHASE DISCRIMINATING CONTROL APPARATUS FOR A BIDIRECTIONAL SOLID-STATE AC POSITION SERVOMOTOR CONTROL
A phase discriminating control apparatus which will provide one of two alternating current outputs depending upon which of two alternating current inputs to the apparatus is leading. Each of the...
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3548283 |
ON-OFF WHEATSTONE BRIDGE APPARATUS CONTROLLING THE OPERATION OF AN ELECTRIC SERVOMOTOR INCLUDING DYNAMIC BRAKING AT BALANCE
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3527993 |
SOLID STATE MOTOR DRIVEN ANTENNA ROTATOR CONTROL CIRCUIT
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3505578 |
"ON-OFF" MOTOR CONTROL FOR USE IN A RADAR SYSTEM
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3495143 |
PLURAL MOTOR CONTROL SYSTEM INCLUDING A REMOTE POSITIONING MOTOR AND A LOCAL INDICATING MOTOR SYNCHRONOUS THEREWITH
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3493830 |
SEEKING SWITCH SERVOCONTROL INCLUDING A UNIQUE COMMUTATOR
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3478254 |
APPARATUS FOR CONTROLLING THE AUTOMATIC POSITIONING OF A DRIVEN MEMBER
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3469354 |
SERVO-SYSTEM AND MULTIPLE-USE BUILDING INCLUDING THE SAME
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3467901 |
SERVOMOTOR CONTROL SYSTEM MOVED WITH SELECTOR DEVICE
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3465222 |
AUTOMATIC DIRECTION CONTROL FOR AN ELECTRICAL MOTOR
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3463981 |
"ON-OFF" SERVO CONTROL FOR A FLUID LEVEL SENSOR INCLUDING A DIFFERENTIAL TRANSFORMER PICKOFF WITH LIMIT OVERRIDE
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3456173 |
PROGRAMMING SYSTEM
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3454855 |
STEPPING SERVO IN WHICH A FIRST TRANSMITTER IS ADVANCED AND A SECOND FEEDBACK TRANSMITTER FOLLOWS
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3453510 |
LINEAR AND ROTARY DIRECT CURRENT STEPPING MOTORS AND CONTROL SYSTEM
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3441824 |
EMBOSSING MACHINE
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3441818 |
"ON-OFF" SERVO SYSTEM WITH DEAD ZONE COMPENSATION AND MAGNETIC SERVO AMPLIFIERS
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3437895 |
ROTATIONAL POSITIONING SYSTEM FOR ELECTRIC MOTORS
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3430117 |
TWO-PHASE SERVOMOTOR CONTROL INCLUDING MEANS TO DEENERGIZE THE REFERENCE WINDING AT NULL TO CONSERVE POWER
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3430053 |
METHOD FOR APERTURE CONTROL IN WHICH THE LOOP GAIN IS CAUSED TO VANISH WHEN THE ABSOLUTE VALUE OF THE ERROR IS LESS THAN A GIVEN VALUE AND IS CAUSED TO ASSUME ITS NOMINAL VALUE WHEN THE ABSOLUTE VALUE OF THE ERROR IS GREATER THAN A SECOND GIVEN VALUE
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3423657 |
TAP CHANGER CONTROL
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3412960 |
Method and apparatus for regulating the orientation of acceleration-controlled bodies
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3406322 |
Seeking switch remote motor control wherein each position is uniquely encoded by 2n conductors and 2n non-conductors
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3395323 |
Electrical motor positioning system
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3367859 |
Control device for electroplating bath
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3360702 |
Digital selector switch and indexing motor control system
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3329945 |
Controllable servomotor with balanceable circuit indicator
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3307083 |
Device for the control of the displacement of a movable element applicable especially to machine tools with numerical definition
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